DATAMONGO-1564 - Polishing.

Fix JavaDoc references and minor a import formatting issue.

Original pull request: #429.

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/AbstractAggregationExpression.java

@@ -44,6 +44,7 @@ abstract class AbstractAggregationExpression implements AggregationExpression {
 		return toDocument(this.value, context);
 	}
 
+	@SuppressWarnings("unchecked")
 	public Document toDocument(Object value, AggregationOperationContext context) {
 
 		Object valueToUse;
@@ -79,6 +80,7 @@ abstract class AbstractAggregationExpression implements AggregationExpression {
 		return Fields.fields(fieldRefs).asList();
 	}
 
+	@SuppressWarnings("unchecked")
 	private Object unpack(Object value, AggregationOperationContext context) {
 
 		if (value instanceof AggregationExpression) {
@@ -122,13 +124,13 @@ abstract class AbstractAggregationExpression implements AggregationExpression {
 		return Arrays.asList(this.value, value);
 	}
 
+	@SuppressWarnings("unchecked")
 	protected java.util.Map<String, Object> append(String key, Object value) {
 
 		if (!(this.value instanceof java.util.Map)) {
 			throw new IllegalArgumentException("o_O");
 		}
-		java.util.Map<String, Object> clone = new LinkedHashMap<String, Object>(
-				(java.util.Map<String, Object>) this.value);
+		java.util.Map<String, Object> clone = new LinkedHashMap<String, Object>((java.util.Map<String, Object>) this.value);
 		clone.put(key, value);
 		return clone;
 
@@ -142,7 +144,7 @@ abstract class AbstractAggregationExpression implements AggregationExpression {
 		if (value instanceof java.util.Map) {
 			return new ArrayList<Object>(((java.util.Map) value).values());
 		}
-		return new ArrayList<Object>(Arrays.asList(value));
+		return new ArrayList<Object>(Collections.singletonList(value));
 	}
 
 	protected abstract String getMongoMethod();

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/AccumulatorOperators.java

@@ -43,7 +43,7 @@ public class AccumulatorOperators {
 	/**
 	 * Take the numeric value referenced resulting from given {@link AggregationExpression}.
 	 *
-	 * @param fieldReference must not be {@literal null}.
+	 * @param expression must not be {@literal null}.
 	 * @return
 	 */
 	public static AccumulatorOperatorFactory valueOf(AggregationExpression expression) {
@@ -71,7 +71,7 @@ public class AccumulatorOperators {
 		}
 
 		/**
-		 * Creates new {@link ArrayOperatorFactory} for given {@link AggregationExpression}.
+		 * Creates new {@link AccumulatorOperatorFactory} for given {@link AggregationExpression}.
 		 *
 		 * @param expression must not be {@literal null}.
 		 */
@@ -83,7 +83,7 @@ public class AccumulatorOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated numeric value expression and calculates and
+		 * Creates new {@link AggregationExpression} that takes the associated numeric value expression and calculates and
 		 * returns the sum.
 		 *
 		 * @return
@@ -93,7 +93,7 @@ public class AccumulatorOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated numeric value expression and returns the
+		 * Creates new {@link AggregationExpression} that takes the associated numeric value expression and returns the
 		 * average value.
 		 *
 		 * @return
@@ -103,7 +103,7 @@ public class AccumulatorOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated numeric value expression and returns the
+		 * Creates new {@link AggregationExpression} that takes the associated numeric value expression and returns the
 		 * maximum value.
 		 *
 		 * @return
@@ -113,7 +113,7 @@ public class AccumulatorOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated numeric value expression and returns the
+		 * Creates new {@link AggregationExpression} that takes the associated numeric value expression and returns the
 		 * minimum value.
 		 *
 		 * @return
@@ -123,7 +123,7 @@ public class AccumulatorOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated numeric value expression and calculates the
+		 * Creates new {@link AggregationExpression} that takes the associated numeric value expression and calculates the
 		 * population standard deviation of the input values.
 		 *
 		 * @return
@@ -133,7 +133,7 @@ public class AccumulatorOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated numeric value expression and calculates the
+		 * Creates new {@link AggregationExpression} that takes the associated numeric value expression and calculates the
 		 * sample standard deviation of the input values.
 		 *
 		 * @return
@@ -214,9 +214,10 @@ public class AccumulatorOperators {
 		}
 
 		/* (non-Javadoc)
-		 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.AbstractAggregationExpression#toDocument(java.lang.Object, org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+		 * @see org.springframework.data.mongodb.core.aggregation.AccumulatorOperators.AbstractAggregationExpression#toDocument(java.lang.Object, org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
 		 */
 		@Override
+		@SuppressWarnings("unchecked")
 		public Document toDocument(Object value, AggregationOperationContext context) {
 
 			if (value instanceof List) {
@@ -296,9 +297,10 @@ public class AccumulatorOperators {
 		}
 
 		/* (non-Javadoc)
-		 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.AbstractAggregationExpression#toDocument(java.lang.Object, org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+		 * @see org.springframework.data.mongodb.core.aggregation.AccumulatorOperators.AbstractAggregationExpression#toDocument(java.lang.Object, org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
 		 */
 		@Override
+		@SuppressWarnings("unchecked")
 		public Document toDocument(Object value, AggregationOperationContext context) {
 
 			if (value instanceof List) {
@@ -378,9 +380,10 @@ public class AccumulatorOperators {
 		}
 
 		/* (non-Javadoc)
-		 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.AbstractAggregationExpression#toDocument(java.lang.Object, org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+		 * @see org.springframework.data.mongodb.core.aggregation.AccumulatorOperators.AbstractAggregationExpression#toDocument(java.lang.Object, org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
 		 */
 		@Override
+		@SuppressWarnings("unchecked")
 		public Document toDocument(Object value, AggregationOperationContext context) {
 
 			if (value instanceof List) {
@@ -460,9 +463,10 @@ public class AccumulatorOperators {
 		}
 
 		/* (non-Javadoc)
-		 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.AbstractAggregationExpression#toDocument(java.lang.Object, org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+		 * @see org.springframework.data.mongodb.core.aggregation.AccumulatorOperators.AbstractAggregationExpression#toDocument(java.lang.Object, org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
 		 */
 		@Override
+		@SuppressWarnings("unchecked")
 		public Document toDocument(Object value, AggregationOperationContext context) {
 
 			if (value instanceof List) {
@@ -542,9 +546,10 @@ public class AccumulatorOperators {
 		}
 
 		/* (non-Javadoc)
-		 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.AbstractAggregationExpression#toDocument(java.lang.Object, org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+		 * @see org.springframework.data.mongodb.core.aggregation.AccumulatorOperators.AbstractAggregationExpression#toDocument(java.lang.Object, org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
 		 */
 		@Override
+		@SuppressWarnings("unchecked")
 		public Document toDocument(Object value, AggregationOperationContext context) {
 
 			if (value instanceof List) {
@@ -624,9 +629,10 @@ public class AccumulatorOperators {
 		}
 
 		/* (non-Javadoc)
-		 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.AbstractAggregationExpression#toDocument(java.lang.Object, org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+		 * @see org.springframework.data.mongodb.core.aggregation.AccumulatorOperators.AbstractAggregationExpression#toDocument(java.lang.Object, org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
 		 */
 		@Override
+		@SuppressWarnings("unchecked")
 		public Document toDocument(Object value, AggregationOperationContext context) {
 
 			if (value instanceof List) {

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/AggregationFunctionExpressions.java

@@ -30,7 +30,7 @@ import org.springframework.util.Assert;
  * @author Christoph Strobl
  * @author Mark Paluch
  * @since 1.7
- * @deprecated since 1.10. Please use {@link AggregationExpressions} instead.
+ * @deprecated since 1.10. Please use {@link ArithmeticOperators} and {@link ComparisonOperators} instead.
  */
 @Deprecated
 public enum AggregationFunctionExpressions {

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/ArithmeticOperators.java

@@ -87,7 +87,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns the absolute value of the associated number.
+		 * Creates new {@link AggregationExpression} that returns the absolute value of the associated number.
 		 *
 		 * @return
 		 */
@@ -96,7 +96,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that adds the value of {@literal fieldReference} to the associated
+		 * Creates new {@link AggregationExpression} that adds the value of {@literal fieldReference} to the associated
 		 * number.
 		 *
 		 * @param fieldReference must not be {@literal null}.
@@ -109,7 +109,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that adds the resulting value of the given
+		 * Creates new {@link AggregationExpression} that adds the resulting value of the given
 		 * {@link AggregationExpression} to the associated number.
 		 *
 		 * @param expression must not be {@literal null}.
@@ -122,7 +122,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that adds the given {@literal value} to the associated number.
+		 * Creates new {@link AggregationExpression} that adds the given {@literal value} to the associated number.
 		 *
 		 * @param value must not be {@literal null}.
 		 * @return
@@ -138,7 +138,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns the smallest integer greater than or equal to the
+		 * Creates new {@link AggregationExpression} that returns the smallest integer greater than or equal to the
 		 * assoicated number.
 		 *
 		 * @return
@@ -148,7 +148,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that ivides the associated number by number referenced via
+		 * Creates new {@link AggregationExpression} that ivides the associated number by number referenced via
 		 * {@literal fieldReference}.
 		 *
 		 * @param fieldReference must not be {@literal null}.
@@ -161,7 +161,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that divides the associated number by number extracted via
+		 * Creates new {@link AggregationExpression} that divides the associated number by number extracted via
 		 * {@literal expression}.
 		 *
 		 * @param expression must not be {@literal null}.
@@ -174,7 +174,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that divides the associated number by given {@literal value}.
+		 * Creates new {@link AggregationExpression} that divides the associated number by given {@literal value}.
 		 *
 		 * @param value
 		 * @return
@@ -190,7 +190,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that raises Euler’s number (i.e. e ) on the associated number.
+		 * Creates new {@link AggregationExpression} that raises Euler’s number (i.e. e ) on the associated number.
 		 *
 		 * @return
 		 */
@@ -199,7 +199,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns the largest integer less than or equal to the associated
+		 * Creates new {@link AggregationExpression} that returns the largest integer less than or equal to the associated
 		 * number.
 		 *
 		 * @return
@@ -209,7 +209,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that calculates the natural logarithm ln (i.e loge) of the assoicated
+		 * Creates new {@link AggregationExpression} that calculates the natural logarithm ln (i.e loge) of the assoicated
 		 * number.
 		 *
 		 * @return
@@ -219,7 +219,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that calculates the log of the associated number in the specified base
+		 * Creates new {@link AggregationExpression} that calculates the log of the associated number in the specified base
 		 * referenced via {@literal fieldReference}.
 		 *
 		 * @param fieldReference must not be {@literal null}.
@@ -232,7 +232,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that calculates the log of the associated number in the specified base
+		 * Creates new {@link AggregationExpression} that calculates the log of the associated number in the specified base
 		 * extracted by given {@link AggregationExpression}.
 		 *
 		 * @param expression must not be {@literal null}.
@@ -245,7 +245,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that calculates the log of a the associated number in the specified
+		 * Creates new {@link AggregationExpression} that calculates the log of a the associated number in the specified
 		 * {@literal base}.
 		 *
 		 * @param base must not be {@literal null}.
@@ -262,7 +262,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that calculates the log base 10 for the associated number.
+		 * Creates new {@link AggregationExpression} that calculates the log base 10 for the associated number.
 		 *
 		 * @return
 		 */
@@ -271,7 +271,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that divides the associated number by another and returns the
+		 * Creates new {@link AggregationExpression} that divides the associated number by another and returns the
 		 * remainder.
 		 *
 		 * @param fieldReference must not be {@literal null}.
@@ -284,7 +284,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that divides the associated number by another and returns the
+		 * Creates new {@link AggregationExpression} that divides the associated number by another and returns the
 		 * remainder.
 		 *
 		 * @param expression must not be {@literal null}.
@@ -297,7 +297,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that divides the associated number by another and returns the
+		 * Creates new {@link AggregationExpression} that divides the associated number by another and returns the
 		 * remainder.
 		 *
 		 * @param value must not be {@literal null}.
@@ -314,7 +314,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that multiplies the associated number with another.
+		 * Creates new {@link AggregationExpression} that multiplies the associated number with another.
 		 *
 		 * @param fieldReference must not be {@literal null}.
 		 * @return
@@ -326,7 +326,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that multiplies the associated number with another.
+		 * Creates new {@link AggregationExpression} that multiplies the associated number with another.
 		 *
 		 * @param expression must not be {@literal null}.
 		 * @return
@@ -338,7 +338,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that multiplies the associated number with another.
+		 * Creates new {@link AggregationExpression} that multiplies the associated number with another.
 		 *
 		 * @param value must not be {@literal null}.
 		 * @return
@@ -354,7 +354,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that raises the associated number to the specified exponent.
+		 * Creates new {@link AggregationExpression} that raises the associated number to the specified exponent.
 		 *
 		 * @param fieldReference must not be {@literal null}.
 		 * @return
@@ -366,7 +366,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that raises the associated number to the specified exponent.
+		 * Creates new {@link AggregationExpression} that raises the associated number to the specified exponent.
 		 *
 		 * @param expression must not be {@literal null}.
 		 * @return
@@ -378,7 +378,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that raises the associated number to the specified exponent.
+		 * Creates new {@link AggregationExpression} that raises the associated number to the specified exponent.
 		 *
 		 * @param value must not be {@literal null}.
 		 * @return
@@ -394,7 +394,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that calculates the square root of the associated number.
+		 * Creates new {@link AggregationExpression} that calculates the square root of the associated number.
 		 *
 		 * @return
 		 */
@@ -403,7 +403,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that subtracts value of given from the associated number.
+		 * Creates new {@link AggregationExpression} that subtracts value of given from the associated number.
 		 *
 		 * @param fieldReference must not be {@literal null}.
 		 * @return
@@ -415,7 +415,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that subtracts value of given from the associated number.
+		 * Creates new {@link AggregationExpression} that subtracts value of given from the associated number.
 		 *
 		 * @param expression must not be {@literal null}.
 		 * @return
@@ -427,7 +427,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that subtracts value from the associated number.
+		 * Creates new {@link AggregationExpression} that subtracts value from the associated number.
 		 *
 		 * @param value
 		 * @return
@@ -443,7 +443,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that truncates a number to its integer.
+		 * Creates new {@link AggregationExpression} that truncates a number to its integer.
 		 *
 		 * @return
 		 */
@@ -452,7 +452,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that calculates and returns the sum of numeric values.
+		 * Creates new {@link AggregationExpression} that calculates and returns the sum of numeric values.
 		 *
 		 * @return
 		 */
@@ -462,7 +462,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns the average value of the numeric values.
+		 * Creates new {@link AggregationExpression} that returns the average value of the numeric values.
 		 *
 		 * @return
 		 */
@@ -472,7 +472,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns the maximum value.
+		 * Creates new {@link AggregationExpression} that returns the maximum value.
 		 *
 		 * @return
 		 */
@@ -482,7 +482,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns the minimum value.
+		 * Creates new {@link AggregationExpression} that returns the minimum value.
 		 *
 		 * @return
 		 */
@@ -492,7 +492,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that calculates the population standard deviation of the input values.
+		 * Creates new {@link AggregationExpression} that calculates the population standard deviation of the input values.
 		 *
 		 * @return
 		 */
@@ -502,7 +502,7 @@ public class ArithmeticOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that calculates the sample standard deviation of the input values.
+		 * Creates new {@link AggregationExpression} that calculates the sample standard deviation of the input values.
 		 *
 		 * @return
 		 */

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/ArrayOperators.java

@@ -48,7 +48,7 @@ public class ArrayOperators {
 	/**
 	 * Take the array referenced resulting from the given {@link AggregationExpression}.
 	 *
-	 * @param fieldReference must not be {@literal null}.
+	 * @param expression must not be {@literal null}.
 	 * @return
 	 */
 	public static ArrayOperatorFactory arrayOf(AggregationExpression expression) {
@@ -88,7 +88,7 @@ public class ArrayOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated array and returns the element at the
+		 * Creates new {@link AggregationExpression} that takes the associated array and returns the element at the
 		 * specified array {@literal position}.
 		 *
 		 * @param position
@@ -99,8 +99,8 @@ public class ArrayOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated array and returns the element at the
-		 * position resulting form the given {@literal expression}.
+		 * Creates new {@link AggregationExpression} that takes the associated array and returns the element at the position
+		 * resulting form the given {@literal expression}.
 		 *
 		 * @param expression must not be {@literal null}.
 		 * @return
@@ -112,8 +112,8 @@ public class ArrayOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated array and returns the element at the
-		 * position defined by the referenced {@literal field}.
+		 * Creates new {@link AggregationExpression} that takes the associated array and returns the element at the position
+		 * defined by the referenced {@literal field}.
 		 *
 		 * @param fieldReference must not be {@literal null}.
 		 * @return
@@ -129,7 +129,7 @@ public class ArrayOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated array and concats the given
+		 * Creates new {@link AggregationExpression} that takes the associated array and concats the given
 		 * {@literal arrayFieldReference} to it.
 		 *
 		 * @param arrayFieldReference must not be {@literal null}.
@@ -142,7 +142,7 @@ public class ArrayOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated array and concats the array resulting form
+		 * Creates new {@link AggregationExpression} that takes the associated array and concats the array resulting form
 		 * the given {@literal expression} to it.
 		 *
 		 * @param expression must not be {@literal null}.
@@ -159,7 +159,7 @@ public class ArrayOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated array and selects a subset of the array to
+		 * Creates new {@link AggregationExpression} that takes the associated array and selects a subset of the array to
 		 * return based on the specified condition.
 		 *
 		 * @return
@@ -169,7 +169,7 @@ public class ArrayOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated array and an check if its an array.
+		 * Creates new {@link AggregationExpression} that takes the associated array and an check if its an array.
 		 *
 		 * @return
 		 */
@@ -178,7 +178,7 @@ public class ArrayOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated array and retrieves its length.
+		 * Creates new {@link AggregationExpression} that takes the associated array and retrieves its length.
 		 *
 		 * @return
 		 */
@@ -187,7 +187,7 @@ public class ArrayOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated array and selects a subset from it.
+		 * Creates new {@link AggregationExpression} that takes the associated array and selects a subset from it.
 		 *
 		 * @return
 		 */
@@ -196,7 +196,7 @@ public class ArrayOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that searches the associated array for an occurrence of a specified
+		 * Creates new {@link AggregationExpression} that searches the associated array for an occurrence of a specified
 		 * value and returns the array index (zero-based) of the first occurrence.
 		 *
 		 * @param value must not be {@literal null}.
@@ -208,7 +208,7 @@ public class ArrayOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns an array with the elements in reverse order.
+		 * Creates new {@link AggregationExpression} that returns an array with the elements in reverse order.
 		 *
 		 * @return
 		 */
@@ -217,8 +217,8 @@ public class ArrayOperators {
 		}
 
 		/**
-		 * Start creating new {@link AggregationExpressions} that applies an {@link AggregationExpression} to each element
-		 * in an array and combines them into a single value.
+		 * Start creating new {@link AggregationExpression} that applies an {@link AggregationExpression} to each element in
+		 * an array and combines them into a single value.
 		 *
 		 * @param expression must not be {@literal null}.
 		 * @return
@@ -235,8 +235,8 @@ public class ArrayOperators {
 		}
 
 		/**
-		 * Start creating new {@link AggregationExpressions} that applies an {@link AggregationExpression} to each element
-		 * in an array and combines them into a single value.
+		 * Start creating new {@link AggregationExpression} that applies an {@link AggregationExpression} to each element in
+		 * an array and combines them into a single value.
 		 *
 		 * @param expressions
 		 * @return
@@ -254,9 +254,9 @@ public class ArrayOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that transposes an array of input arrays so that the first element
-		 * of the output array would be an array containing, the first element of the first input array, the first element
-		 * of the second input array, etc.
+		 * Creates new {@link AggregationExpression} that transposes an array of input arrays so that the first element of
+		 * the output array would be an array containing, the first element of the first input array, the first element of
+		 * the second input array, etc.
 		 *
 		 * @param arrays must not be {@literal null}.
 		 * @return
@@ -266,8 +266,8 @@ public class ArrayOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns a boolean indicating whether a specified value is in
-		 * the associated array.
+		 * Creates new {@link AggregationExpression} that returns a boolean indicating whether a specified value is in the
+		 * associated array.
 		 *
 		 * @param value must not be {@literal null}.
 		 * @return
@@ -573,13 +573,18 @@ public class ArrayOperators {
 				this.filter = new Filter();
 			}
 
+			/**
+			 * Creates new {@link InputBuilder}.
+			 *
+			 * @return
+			 */
 			public static InputBuilder newBuilder() {
 				return new FilterExpressionBuilder();
 			}
 
 			/*
 			 * (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.Filter.InputBuilder#filter(java.util.List)
+			 * @see org.springframework.data.mongodb.core.aggregation.ArrayOperators.Filter.InputBuilder#filter(java.util.List)
 			 */
 			@Override
 			public AsBuilder filter(List<?> array) {
@@ -591,7 +596,7 @@ public class ArrayOperators {
 
 			/*
 			 * (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.Filter.InputBuilder#filter(org.springframework.data.mongodb.core.aggregation.Field)
+			 * @see org.springframework.data.mongodb.core.aggregation.ArrayOperators.Filter.InputBuilder#filter(org.springframework.data.mongodb.core.aggregation.Field)
 			 */
 			@Override
 			public AsBuilder filter(Field field) {
@@ -603,7 +608,7 @@ public class ArrayOperators {
 
 			/*
 			 * (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.Filter.AsBuilder#as(java.lang.String)
+			 * @see org.springframework.data.mongodb.core.aggregation.ArrayOperators.Filter.AsBuilder#as(java.lang.String)
 			 */
 			@Override
 			public ConditionBuilder as(String variableName) {
@@ -615,7 +620,7 @@ public class ArrayOperators {
 
 			/*
 			 * (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.Filter.ConditionBuilder#by(org.springframework.data.mongodb.core.aggregation.AggregationExpression)
+			 * @see org.springframework.data.mongodb.core.aggregation.ArrayOperators.Filter.ConditionBuilder#by(org.springframework.data.mongodb.core.aggregation.AggregationExpression)
 			 */
 			@Override
 			public Filter by(AggregationExpression condition) {
@@ -627,7 +632,7 @@ public class ArrayOperators {
 
 			/*
 			 * (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.Filter.ConditionBuilder#by(java.lang.String)
+			 * @see org.springframework.data.mongodb.core.aggregation.ArrayOperators.Filter.ConditionBuilder#by(java.lang.String)
 			 */
 			@Override
 			public Filter by(String expression) {
@@ -639,7 +644,7 @@ public class ArrayOperators {
 
 			/*
 			 * (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.Filter.ConditionBuilder#by(org.bson.Document)
+			 * @see org.springframework.data.mongodb.core.aggregation.ArrayOperators.Filter.ConditionBuilder#by(org.bson.Document)
 			 */
 			@Override
 			public Filter by(Document expression) {
@@ -1177,7 +1182,7 @@ public class ArrayOperators {
 			 * <b>NOTE:</b> During evaluation of the in expression the variable references {@link Variable#THIS} and
 			 * {@link Variable#VALUE} are available.
 			 *
-			 * @param expression must not be {@literal null}.
+			 * @param expressions must not be {@literal null}.
 			 * @return
 			 */
 			Reduce reduce(PropertyExpression... expressions);

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/BooleanOperators.java

@@ -51,7 +51,7 @@ public class BooleanOperators {
 	}
 
 	/**
-	 * Creates new {@link AggregationExpressions} that evaluates the boolean value of the referenced field and returns the
+	 * Creates new {@link AggregationExpression} that evaluates the boolean value of the referenced field and returns the
 	 * opposite boolean value.
 	 *
 	 * @param fieldReference must not be {@literal null}.
@@ -62,7 +62,7 @@ public class BooleanOperators {
 	}
 
 	/**
-	 * Creates new {@link AggregationExpressions} that evaluates the boolean value of {@link AggregationExpression} result
+	 * Creates new {@link AggregationExpression} that evaluates the boolean value of {@link AggregationExpression} result
 	 * and returns the opposite boolean value.
 	 *
 	 * @param expression must not be {@literal null}.
@@ -105,7 +105,7 @@ public class BooleanOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that evaluates one or more expressions and returns {@literal true} if
+		 * Creates new {@link AggregationExpression} that evaluates one or more expressions and returns {@literal true} if
 		 * all of the expressions are {@literal true}.
 		 *
 		 * @param expression must not be {@literal null}.
@@ -118,7 +118,7 @@ public class BooleanOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that evaluates one or more expressions and returns {@literal true} if
+		 * Creates new {@link AggregationExpression} that evaluates one or more expressions and returns {@literal true} if
 		 * all of the expressions are {@literal true}.
 		 *
 		 * @param fieldReference must not be {@literal null}.
@@ -135,7 +135,7 @@ public class BooleanOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that evaluates one or more expressions and returns {@literal true} if
+		 * Creates new {@link AggregationExpression} that evaluates one or more expressions and returns {@literal true} if
 		 * any of the expressions are {@literal true}.
 		 *
 		 * @param expression must not be {@literal null}.
@@ -148,7 +148,7 @@ public class BooleanOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that evaluates one or more expressions and returns {@literal true} if
+		 * Creates new {@link AggregationExpression} that evaluates one or more expressions and returns {@literal true} if
 		 * any of the expressions are {@literal true}.
 		 *
 		 * @param fieldReference must not be {@literal null}.

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/ComparisonOperators.java

@@ -78,7 +78,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values.
+		 * Creates new {@link AggregationExpression} that compares two values.
 		 *
 		 * @param fieldReference must not be {@literal null}.
 		 * @return
@@ -88,7 +88,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values.
+		 * Creates new {@link AggregationExpression} that compares two values.
 		 *
 		 * @param expression must not be {@literal null}.
 		 * @return
@@ -98,7 +98,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values.
+		 * Creates new {@link AggregationExpression} that compares two values.
 		 *
 		 * @param value must not be {@literal null}.
 		 * @return
@@ -112,7 +112,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values and returns {@literal true} when the first
+		 * Creates new {@link AggregationExpression} that compares two values and returns {@literal true} when the first
 		 * value is equal to the value of the referenced field.
 		 *
 		 * @param fieldReference must not be {@literal null}.
@@ -123,7 +123,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values and returns {@literal true} when the first
+		 * Creates new {@link AggregationExpression} that compares two values and returns {@literal true} when the first
 		 * value is equal to the expression result.
 		 *
 		 * @param expression must not be {@literal null}.
@@ -134,7 +134,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values and returns {@literal true} when the first
+		 * Creates new {@link AggregationExpression} that compares two values and returns {@literal true} when the first
 		 * value is equal to the given value.
 		 *
 		 * @param value must not be {@literal null}.
@@ -149,7 +149,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values and returns {@literal true} when the first
+		 * Creates new {@link AggregationExpression} that compares two values and returns {@literal true} when the first
 		 * value is greater than the value of the referenced field.
 		 *
 		 * @param fieldReference must not be {@literal null}.
@@ -160,7 +160,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values and returns {@literal true} when the first
+		 * Creates new {@link AggregationExpression} that compares two values and returns {@literal true} when the first
 		 * value is greater than the expression result.
 		 *
 		 * @param expression must not be {@literal null}.
@@ -171,7 +171,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values and returns {@literal true} when the first
+		 * Creates new {@link AggregationExpression} that compares two values and returns {@literal true} when the first
 		 * value is greater than the given value.
 		 *
 		 * @param value must not be {@literal null}.
@@ -186,7 +186,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values and returns {@literal true} when the first
+		 * Creates new {@link AggregationExpression} that compares two values and returns {@literal true} when the first
 		 * value is greater than or equivalent to the value of the referenced field.
 		 *
 		 * @param fieldReference must not be {@literal null}.
@@ -197,7 +197,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values and returns {@literal true} when the first
+		 * Creates new {@link AggregationExpression} that compares two values and returns {@literal true} when the first
 		 * value is greater than or equivalent to the expression result.
 		 *
 		 * @param expression must not be {@literal null}.
@@ -208,7 +208,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values and returns {@literal true} when the first
+		 * Creates new {@link AggregationExpression} that compares two values and returns {@literal true} when the first
 		 * value is greater than or equivalent to the given value.
 		 *
 		 * @param value must not be {@literal null}.
@@ -223,7 +223,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values and returns {@literal true} when the first
+		 * Creates new {@link AggregationExpression} that compares two values and returns {@literal true} when the first
 		 * value is less than the value of the referenced field.
 		 *
 		 * @param fieldReference must not be {@literal null}.
@@ -234,7 +234,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values and returns {@literal true} when the first
+		 * Creates new {@link AggregationExpression} that compares two values and returns {@literal true} when the first
 		 * value is less than the expression result.
 		 *
 		 * @param expression must not be {@literal null}.
@@ -245,7 +245,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values and returns {@literal true} when the first
+		 * Creates new {@link AggregationExpression} that compares two values and returns {@literal true} when the first
 		 * value is less than to the given value.
 		 *
 		 * @param value must not be {@literal null}.
@@ -260,7 +260,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values and returns {@literal true} when the first
+		 * Creates new {@link AggregationExpression} that compares two values and returns {@literal true} when the first
 		 * value is less than or equivalent to the value of the referenced field.
 		 *
 		 * @param fieldReference must not be {@literal null}.
@@ -271,7 +271,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values and returns {@literal true} when the first
+		 * Creates new {@link AggregationExpression} that compares two values and returns {@literal true} when the first
 		 * value is less than or equivalent to the expression result.
 		 *
 		 * @param expression must not be {@literal null}.
@@ -282,7 +282,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values and returns {@literal true} when the first
+		 * Creates new {@link AggregationExpression} that compares two values and returns {@literal true} when the first
 		 * value is less than or equivalent to the given value.
 		 *
 		 * @param value
@@ -297,7 +297,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values and returns {@literal true} when the values
+		 * Creates new {@link AggregationExpression} that compares two values and returns {@literal true} when the values
 		 * are not equivalent.
 		 *
 		 * @param fieldReference must not be {@literal null}.
@@ -308,7 +308,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values and returns {@literal true} when the values
+		 * Creates new {@link AggregationExpression} that compares two values and returns {@literal true} when the values
 		 * are not equivalent.
 		 *
 		 * @param expression must not be {@literal null}.
@@ -319,7 +319,7 @@ public class ComparisonOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares two values and returns {@literal true} when the values
+		 * Creates new {@link AggregationExpression} that compares two values and returns {@literal true} when the values
 		 * are not equivalent.
 		 *
 		 * @param value must not be {@literal null}.

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/ConditionalOperators.java

@@ -33,6 +33,7 @@ import org.springframework.util.ClassUtils;
  * Gateway to {@literal conditional expressions} that evaluate their argument expressions as booleans to a value.
  *
  * @author Mark Paluch
+ * @since 1.10
  */
 public class ConditionalOperators {
 
@@ -67,7 +68,7 @@ public class ConditionalOperators {
 	}
 
 	/**
-	 * Creates new {@link AggregationExpressions} that evaluates an expression and returns the value of the expression if
+	 * Creates new {@link AggregationExpression} that evaluates an expression and returns the value of the expression if
 	 * the expression evaluates to a non-null value. If the expression evaluates to a {@literal null} value, including
 	 * instances of undefined values or missing fields, returns the value of the replacement expression.
 	 *
@@ -81,7 +82,7 @@ public class ConditionalOperators {
 	}
 
 	/**
-	 * Creates new {@link AggregationExpressions} that evaluates an expression and returns the value of the expression if
+	 * Creates new {@link AggregationExpression} that evaluates an expression and returns the value of the expression if
 	 * the expression evaluates to a non-null value. If the expression evaluates to a {@literal null} value, including
 	 * instances of undefined values or missing fields, returns the value of the replacement expression.
 	 *
@@ -180,7 +181,7 @@ public class ConditionalOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that evaluates a boolean expression to return one of the two specified
+		 * Creates new {@link AggregationExpression} that evaluates a boolean expression to return one of the two specified
 		 * return expressions.
 		 *
 		 * @param expression must not be {@literal null}.
@@ -193,7 +194,7 @@ public class ConditionalOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that evaluates a boolean expression to return one of the two specified
+		 * Creates new {@link AggregationExpression} that evaluates a boolean expression to return one of the two specified
 		 * return expressions.
 		 *
 		 * @param fieldReference must not be {@literal null}.
@@ -228,7 +229,8 @@ public class ConditionalOperators {
 	 * field references}, {@link AggregationExpression expressions}, values of simple MongoDB types or values that can be
 	 * converted to a simple MongoDB type.
 	 *
-	 * @see http://docs.mongodb.com/manual/reference/operator/aggregation/ifNull/
+	 * @see <a href=
+	 *      "http://docs.mongodb.com/manual/reference/operator/aggregation/ifNull/">http://docs.mongodb.com/manual/reference/operator/aggregation/ifNull/</a>
 	 * @author Mark Paluch
 	 */
 	public static class IfNull implements AggregationExpression {
@@ -306,7 +308,7 @@ public class ConditionalOperators {
 		/**
 		 * @author Mark Paluch
 		 */
-		public static interface IfNullBuilder {
+		public interface IfNullBuilder {
 
 			/**
 			 * @param fieldReference the field to check for a {@literal null} value, field reference must not be
@@ -326,7 +328,7 @@ public class ConditionalOperators {
 		/**
 		 * @author Mark Paluch
 		 */
-		public static interface ThenBuilder {
+		public interface ThenBuilder {
 
 			/**
 			 * @param value the value to be used if the {@code $ifNull} condition evaluates {@literal true}. Can be a
@@ -346,11 +348,11 @@ public class ConditionalOperators {
 			 * @param expression the expression yielding to the replacement value, must not be {@literal null}.
 			 * @return
 			 */
-			public IfNull thenValueOf(AggregationExpression expression);
+			IfNull thenValueOf(AggregationExpression expression);
 		}
 
 		/**
-		 * Builder for fluent {@link IfNullOperator} creation.
+		 * Builder for fluent {@link IfNull} creation.
 		 *
 		 * @author Mark Paluch
 		 */
@@ -361,7 +363,7 @@ public class ConditionalOperators {
 			private IfNullOperatorBuilder() {}
 
 			/**
-			 * Creates a new builder for {@link IfNullOperator}.
+			 * Creates a new builder for {@link IfNull}.
 			 *
 			 * @return never {@literal null}.
 			 */
@@ -370,7 +372,7 @@ public class ConditionalOperators {
 			}
 
 			/* (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.IfNull.IfNullBuilder#ifNull(java.lang.String)
+			 * @see org.springframework.data.mongodb.core.aggregation.ConditionalOperators.IfNull.IfNullBuilder#ifNull(java.lang.String)
 			 */
 			public ThenBuilder ifNull(String fieldReference) {
 
@@ -380,7 +382,7 @@ public class ConditionalOperators {
 			}
 
 			/* (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.IfNull.IfNullBuilder#ifNull(org.springframework.data.mongodb.core.aggregation.AggregationExpression)
+			 * @see org.springframework.data.mongodb.core.aggregation.ConditionalOperators.IfNull.IfNullBuilder#ifNull(org.springframework.data.mongodb.core.aggregation.AggregationExpression)
 			 */
 			@Override
 			public ThenBuilder ifNull(AggregationExpression expression) {
@@ -391,14 +393,14 @@ public class ConditionalOperators {
 			}
 
 			/* (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.IfNull.ThenBuilder#then(java.lang.Object)
+			 * @see org.springframework.data.mongodb.core.aggregation.ConditionalOperators.IfNull.ThenBuilder#then(java.lang.Object)
 			 */
 			public IfNull then(Object value) {
 				return new IfNull(condition, value);
 			}
 
 			/* (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.IfNull.ThenBuilder#thenValueOf(java.lang.String)
+			 * @see org.springframework.data.mongodb.core.aggregation.ConditionalOperators.IfNull.ThenBuilder#thenValueOf(java.lang.String)
 			 */
 			public IfNull thenValueOf(String fieldReference) {
 
@@ -407,7 +409,7 @@ public class ConditionalOperators {
 			}
 
 			/* (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.IfNull.ThenBuilder#thenValueOf(org.springframework.data.mongodb.core.aggregation.AggregationExpression)
+			 * @see org.springframework.data.mongodb.core.aggregation.ConditionalOperators.IfNull.ThenBuilder#thenValueOf(org.springframework.data.mongodb.core.aggregation.AggregationExpression)
 			 */
 			public IfNull thenValueOf(AggregationExpression expression) {
 
@@ -530,7 +532,8 @@ public class ConditionalOperators {
 	 * {@link AggregationExpression expressions}, values of simple MongoDB types or values that can be converted to a
 	 * simple MongoDB type.
 	 *
-	 * @see http://docs.mongodb.com/manual/reference/operator/aggregation/cond/
+	 * @see <a href=
+	 *      "http://docs.mongodb.com/manual/reference/operator/aggregation/cond/">http://docs.mongodb.com/manual/reference/operator/aggregation/cond/</a>
 	 * @author Mark Paluch
 	 * @author Christoph Strobl
 	 */
@@ -761,7 +764,7 @@ public class ConditionalOperators {
 		/**
 		 * @author Mark Paluch
 		 */
-		public static interface WhenBuilder {
+		public interface WhenBuilder {
 
 			/**
 			 * @param booleanExpression expression that yields in a boolean result, must not be {@literal null}.
@@ -791,7 +794,7 @@ public class ConditionalOperators {
 		/**
 		 * @author Mark Paluch
 		 */
-		public static interface ThenBuilder {
+		public interface ThenBuilder {
 
 			/**
 			 * @param value the value to be used if the condition evaluates {@literal true}. Can be a {@link Document}, a
@@ -817,7 +820,7 @@ public class ConditionalOperators {
 		/**
 		 * @author Mark Paluch
 		 */
-		public static interface OtherwiseBuilder {
+		public interface OtherwiseBuilder {
 
 			/**
 			 * @param value the value to be used if the condition evaluates {@literal false}. Can be a {@link Document}, a
@@ -862,7 +865,7 @@ public class ConditionalOperators {
 			}
 
 			/* (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.Cond.WhenBuilder#when(org.bson.Document)
+			 * @see org.springframework.data.mongodb.core.aggregation.ConditionalOperators.Cond.WhenBuilder#when(org.bson.Document)
 			 */
 			@Override
 			public ConditionalExpressionBuilder when(Document booleanExpression) {
@@ -874,7 +877,7 @@ public class ConditionalOperators {
 			}
 
 			/* (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.Cond.WhenBuilder#when(org.springframework.data.mongodb.core.query.CriteriaDefinition)
+			 * @see org.springframework.data.mongodb.core.aggregation.ConditionalOperators.Cond.WhenBuilder#when(org.springframework.data.mongodb.core.query.CriteriaDefinition)
 			 */
 			@Override
 			public ThenBuilder when(CriteriaDefinition criteria) {
@@ -885,7 +888,7 @@ public class ConditionalOperators {
 			}
 
 			/* (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.Cond.WhenBuilder#when(org.springframework.data.mongodb.core.aggregation.AggregationExpression)
+			 * @see org.springframework.data.mongodb.core.aggregation.ConditionalOperators.Cond.WhenBuilder#when(org.springframework.data.mongodb.core.aggregation.AggregationExpression)
 			 */
 			@Override
 			public ThenBuilder when(AggregationExpression expression) {
@@ -896,7 +899,7 @@ public class ConditionalOperators {
 			}
 
 			/* (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.Cond.WhenBuilder#when(java.lang.String)
+			 * @see org.springframework.data.mongodb.core.aggregation.ConditionalOperators.Cond.WhenBuilder#when(java.lang.String)
 			 */
 			@Override
 			public ThenBuilder when(String booleanField) {
@@ -907,7 +910,7 @@ public class ConditionalOperators {
 			}
 
 			/* (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.Cond.ThenBuilder#then(java.lang.Object)
+			 * @see org.springframework.data.mongodb.core.aggregation.ConditionalOperators.Cond.ThenBuilder#then(java.lang.Object)
 			 */
 			@Override
 			public OtherwiseBuilder then(Object thenValue) {
@@ -918,7 +921,7 @@ public class ConditionalOperators {
 			}
 
 			/* (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.Cond.ThenBuilder#thenValueOf(java.lang.String)
+			 * @see org.springframework.data.mongodb.core.aggregation.ConditionalOperators.Cond.ThenBuilder#thenValueOf(java.lang.String)
 			 */
 			@Override
 			public OtherwiseBuilder thenValueOf(String fieldReference) {
@@ -929,7 +932,7 @@ public class ConditionalOperators {
 			}
 
 			/* (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.Cond.ThenBuilder#thenValueOf(org.springframework.data.mongodb.core.aggregation.AggregationExpression)
+			 * @see org.springframework.data.mongodb.core.aggregation.ConditionalOperators.Cond.ThenBuilder#thenValueOf(org.springframework.data.mongodb.core.aggregation.AggregationExpression)
 			 */
 			@Override
 			public OtherwiseBuilder thenValueOf(AggregationExpression expression) {
@@ -940,7 +943,7 @@ public class ConditionalOperators {
 			}
 
 			/* (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.Cond.OtherwiseBuilder#otherwise(java.lang.Object)
+			 * @see org.springframework.data.mongodb.core.aggregation.ConditionalOperators.Cond.OtherwiseBuilder#otherwise(java.lang.Object)
 			 */
 			@Override
 			public Cond otherwise(Object otherwiseValue) {
@@ -950,7 +953,7 @@ public class ConditionalOperators {
 			}
 
 			/* (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.Cond.OtherwiseBuilder#otherwiseValueOf(java.lang.String)
+			 * @see org.springframework.data.mongodb.core.aggregation.ConditionalOperators.Cond.OtherwiseBuilder#otherwiseValueOf(java.lang.String)
 			 */
 			@Override
 			public Cond otherwiseValueOf(String fieldReference) {
@@ -960,7 +963,7 @@ public class ConditionalOperators {
 			}
 
 			/* (non-Javadoc)
-			 * @see org.springframework.data.mongodb.core.aggregation.AggregationExpressions.Cond.OtherwiseBuilder#otherwiseValueOf(org.springframework.data.mongodb.core.aggregation.AggregationExpression)
+			 * @see org.springframework.data.mongodb.core.aggregation.ConditionalOperators.Cond.OtherwiseBuilder#otherwiseValueOf(org.springframework.data.mongodb.core.aggregation.AggregationExpression)
 			 */
 			@Override
 			public Cond otherwiseValueOf(AggregationExpression expression) {

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/DateOperators.java

@@ -85,7 +85,7 @@ public class DateOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns the day of the year for a date as a number between 1 and
+		 * Creates new {@link AggregationExpression} that returns the day of the year for a date as a number between 1 and
 		 * 366.
 		 *
 		 * @return
@@ -95,7 +95,7 @@ public class DateOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns the day of the month for a date as a number between 1 and
+		 * Creates new {@link AggregationExpression} that returns the day of the month for a date as a number between 1 and
 		 * 31.
 		 *
 		 * @return
@@ -105,7 +105,7 @@ public class DateOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns the day of the week for a date as a number between 1
+		 * Creates new {@link AggregationExpression} that returns the day of the week for a date as a number between 1
 		 * (Sunday) and 7 (Saturday).
 		 *
 		 * @return
@@ -115,7 +115,7 @@ public class DateOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns the year portion of a date.
+		 * Creates new {@link AggregationExpression} that returns the year portion of a date.
 		 *
 		 * @return
 		 */
@@ -124,7 +124,7 @@ public class DateOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns the month of a date as a number between 1 and 12.
+		 * Creates new {@link AggregationExpression} that returns the month of a date as a number between 1 and 12.
 		 *
 		 * @return
 		 */
@@ -133,7 +133,7 @@ public class DateOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns the week of the year for a date as a number between 0 and
+		 * Creates new {@link AggregationExpression} that returns the week of the year for a date as a number between 0 and
 		 * 53.
 		 *
 		 * @return
@@ -143,7 +143,7 @@ public class DateOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns the hour portion of a date as a number between 0 and 23.
+		 * Creates new {@link AggregationExpression} that returns the hour portion of a date as a number between 0 and 23.
 		 *
 		 * @return
 		 */
@@ -152,8 +152,7 @@ public class DateOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns the minute portion of a date as a number between 0 and
-		 * 59.
+		 * Creates new {@link AggregationExpression} that returns the minute portion of a date as a number between 0 and 59.
 		 *
 		 * @return
 		 */
@@ -162,8 +161,8 @@ public class DateOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns the second portion of a date as a number between 0 and
-		 * 59, but can be 60 to account for leap seconds.
+		 * Creates new {@link AggregationExpression} that returns the second portion of a date as a number between 0 and 59,
+		 * but can be 60 to account for leap seconds.
 		 *
 		 * @return
 		 */
@@ -172,7 +171,7 @@ public class DateOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns the millisecond portion of a date as an integer between 0
+		 * Creates new {@link AggregationExpression} that returns the millisecond portion of a date as an integer between 0
 		 * and 999.
 		 *
 		 * @return
@@ -182,7 +181,7 @@ public class DateOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that converts a date object to a string according to a user-specified
+		 * Creates new {@link AggregationExpression} that converts a date object to a string according to a user-specified
 		 * {@literal format}.
 		 *
 		 * @param format must not be {@literal null}.
@@ -193,8 +192,8 @@ public class DateOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns the weekday number in ISO 8601 format, ranging from 1
-		 * (for Monday) to 7 (for Sunday).
+		 * Creates new {@link AggregationExpression} that returns the weekday number in ISO 8601 format, ranging from 1 (for
+		 * Monday) to 7 (for Sunday).
 		 *
 		 * @return
 		 */
@@ -203,7 +202,7 @@ public class DateOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns the week number in ISO 8601 format, ranging from 1 to 53.
+		 * Creates new {@link AggregationExpression} that returns the week number in ISO 8601 format, ranging from 1 to 53.
 		 *
 		 * @return
 		 */
@@ -212,7 +211,7 @@ public class DateOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns the year number in ISO 8601 format.
+		 * Creates new {@link AggregationExpression} that returns the year number in ISO 8601 format.
 		 *
 		 * @return
 		 */

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/LiteralOperators.java

@@ -56,7 +56,7 @@ public class LiteralOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that returns the associated value without parsing.
+		 * Creates new {@link Literal} that returns the associated value without parsing.
 		 *
 		 * @return
 		 */

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/SetOperators.java

@@ -83,7 +83,7 @@ public class SetOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares the previously mentioned field to one or more arrays and
+		 * Creates new {@link AggregationExpression} that compares the previously mentioned field to one or more arrays and
 		 * returns {@literal true} if they have the same distinct elements and {@literal false} otherwise.
 		 *
 		 * @param arrayReferences must not be {@literal null}.
@@ -94,7 +94,7 @@ public class SetOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that compares the previously mentioned field to one or more arrays and
+		 * Creates new {@link AggregationExpression} that compares the previously mentioned field to one or more arrays and
 		 * returns {@literal true} if they have the same distinct elements and {@literal false} otherwise.
 		 *
 		 * @param expressions must not be {@literal null}.
@@ -109,7 +109,7 @@ public class SetOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes array of the previously mentioned field and one or more
+		 * Creates new {@link AggregationExpression} that takes array of the previously mentioned field and one or more
 		 * arrays and returns an array that contains the elements that appear in every of those.
 		 *
 		 * @param arrayReferences must not be {@literal null}.
@@ -120,7 +120,7 @@ public class SetOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes array of the previously mentioned field and one or more
+		 * Creates new {@link AggregationExpression} that takes array of the previously mentioned field and one or more
 		 * arrays and returns an array that contains the elements that appear in every of those.
 		 *
 		 * @param expressions must not be {@literal null}.
@@ -135,7 +135,7 @@ public class SetOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes array of the previously mentioned field and one or more
+		 * Creates new {@link AggregationExpression} that takes array of the previously mentioned field and one or more
 		 * arrays and returns an array that contains the elements that appear in any of those.
 		 *
 		 * @param arrayReferences must not be {@literal null}.
@@ -146,7 +146,7 @@ public class SetOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes array of the previously mentioned field and one or more
+		 * Creates new {@link AggregationExpression} that takes array of the previously mentioned field and one or more
 		 * arrays and returns an array that contains the elements that appear in any of those.
 		 *
 		 * @param expressions must not be {@literal null}.
@@ -161,8 +161,8 @@ public class SetOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes array of the previously mentioned field and returns an
-		 * array containing the elements that do not exist in the given {@literal arrayReference}.
+		 * Creates new {@link AggregationExpression} that takes array of the previously mentioned field and returns an array
+		 * containing the elements that do not exist in the given {@literal arrayReference}.
 		 *
 		 * @param arrayReference must not be {@literal null}.
 		 * @return
@@ -172,8 +172,8 @@ public class SetOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes array of the previously mentioned field and returns an
-		 * array containing the elements that do not exist in the given {@link AggregationExpression}.
+		 * Creates new {@link AggregationExpression} that takes array of the previously mentioned field and returns an array
+		 * containing the elements that do not exist in the given {@link AggregationExpression}.
 		 *
 		 * @param expression must not be {@literal null}.
 		 * @return
@@ -187,7 +187,7 @@ public class SetOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes array of the previously mentioned field and returns
+		 * Creates new {@link AggregationExpression} that takes array of the previously mentioned field and returns
 		 * {@literal true} if it is a subset of the given {@literal arrayReference}.
 		 *
 		 * @param arrayReference must not be {@literal null}.
@@ -198,7 +198,7 @@ public class SetOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes array of the previously mentioned field and returns
+		 * Creates new {@link AggregationExpression} that takes array of the previously mentioned field and returns
 		 * {@literal true} if it is a subset of the given {@link AggregationExpression}.
 		 *
 		 * @param expression must not be {@literal null}.
@@ -213,7 +213,7 @@ public class SetOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes array of the previously mentioned field and returns
+		 * Creates new {@link AggregationExpression} that takes array of the previously mentioned field and returns
 		 * {@literal true} if any of the elements are {@literal true} and {@literal false} otherwise.
 		 *
 		 * @return
@@ -223,7 +223,7 @@ public class SetOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that tkes array of the previously mentioned field and returns
+		 * Creates new {@link AggregationExpression} that tkes array of the previously mentioned field and returns
 		 * {@literal true} if no elements is {@literal false}.
 		 *
 		 * @return

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/StringOperators.java

@@ -84,7 +84,7 @@ public class StringOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated string representation and concats the value
+		 * Creates new {@link AggregationExpression} that takes the associated string representation and concats the value
 		 * of the referenced field to it.
 		 *
 		 * @param fieldReference must not be {@literal null}.
@@ -97,7 +97,7 @@ public class StringOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated string representation and concats the result
+		 * Creates new {@link AggregationExpression} that takes the associated string representation and concats the result
 		 * of the given {@link AggregationExpression} to it.
 		 *
 		 * @param expression must not be {@literal null}.
@@ -110,7 +110,7 @@ public class StringOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated string representation and concats given
+		 * Creates new {@link AggregationExpression} that takes the associated string representation and concats given
 		 * {@literal value} to it.
 		 *
 		 * @param value must not be {@literal null}.
@@ -127,8 +127,8 @@ public class StringOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated string representation and returns a
-		 * substring starting at a specified index position.
+		 * Creates new {@link AggregationExpression} that takes the associated string representation and returns a substring
+		 * starting at a specified index position.
 		 *
 		 * @param start
 		 * @return
@@ -138,8 +138,8 @@ public class StringOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated string representation and returns a
-		 * substring starting at a specified index position including the specified number of characters.
+		 * Creates new {@link AggregationExpression} that takes the associated string representation and returns a substring
+		 * starting at a specified index position including the specified number of characters.
 		 *
 		 * @param start
 		 * @param nrOfChars
@@ -154,7 +154,7 @@ public class StringOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated string representation and lowers it.
+		 * Creates new {@link AggregationExpression} that takes the associated string representation and lowers it.
 		 *
 		 * @return
 		 */
@@ -163,7 +163,7 @@ public class StringOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated string representation and uppers it.
+		 * Creates new {@link AggregationExpression} that takes the associated string representation and uppers it.
 		 *
 		 * @return
 		 */
@@ -172,7 +172,7 @@ public class StringOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated string representation and performs
+		 * Creates new {@link AggregationExpression} that takes the associated string representation and performs
 		 * case-insensitive comparison to the given {@literal value}.
 		 *
 		 * @param value must not be {@literal null}.
@@ -185,7 +185,7 @@ public class StringOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated string representation and performs
+		 * Creates new {@link AggregationExpression} that takes the associated string representation and performs
 		 * case-insensitive comparison to the referenced {@literal fieldReference}.
 		 *
 		 * @param fieldReference must not be {@literal null}.
@@ -198,7 +198,7 @@ public class StringOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated string representation and performs
+		 * Creates new {@link AggregationExpression} that takes the associated string representation and performs
 		 * case-insensitive comparison to the result of the given {@link AggregationExpression}.
 		 *
 		 * @param expression must not be {@literal null}.
@@ -215,7 +215,7 @@ public class StringOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated string representation and searches a string
+		 * Creates new {@link AggregationExpression} that takes the associated string representation and searches a string
 		 * for an occurrence of a given {@literal substring} and returns the UTF-8 byte index (zero-based) of the first
 		 * occurrence.
 		 *
@@ -229,7 +229,7 @@ public class StringOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated string representation and searches a string
+		 * Creates new {@link AggregationExpression} that takes the associated string representation and searches a string
 		 * for an occurrence of a substring contained in the given {@literal field reference} and returns the UTF-8 byte
 		 * index (zero-based) of the first occurrence.
 		 *
@@ -243,7 +243,7 @@ public class StringOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated string representation and searches a string
+		 * Creates new {@link AggregationExpression} that takes the associated string representation and searches a string
 		 * for an occurrence of a substring resulting from the given {@link AggregationExpression} and returns the UTF-8
 		 * byte index (zero-based) of the first occurrence.
 		 *
@@ -261,7 +261,7 @@ public class StringOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated string representation and searches a string
+		 * Creates new {@link AggregationExpression} that takes the associated string representation and searches a string
 		 * for an occurrence of a given {@literal substring} and returns the UTF-8 code point index (zero-based) of the
 		 * first occurrence.
 		 *
@@ -275,7 +275,7 @@ public class StringOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated string representation and searches a string
+		 * Creates new {@link AggregationExpression} that takes the associated string representation and searches a string
 		 * for an occurrence of a substring contained in the given {@literal field reference} and returns the UTF-8 code
 		 * point index (zero-based) of the first occurrence.
 		 *
@@ -289,7 +289,7 @@ public class StringOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated string representation and searches a string
+		 * Creates new {@link AggregationExpression} that takes the associated string representation and searches a string
 		 * for an occurrence of a substring resulting from the given {@link AggregationExpression} and returns the UTF-8
 		 * code point index (zero-based) of the first occurrence.
 		 *
@@ -365,8 +365,8 @@ public class StringOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated string representation and returns a
-		 * substring starting at a specified code point index position.
+		 * Creates new {@link AggregationExpression} that takes the associated string representation and returns a substring
+		 * starting at a specified code point index position.
 		 *
 		 * @param codePointStart
 		 * @return
@@ -376,8 +376,8 @@ public class StringOperators {
 		}
 
 		/**
-		 * Creates new {@link AggregationExpressions} that takes the associated string representation and returns a
-		 * substring starting at a specified code point index position including the specified number of code points.
+		 * Creates new {@link AggregationExpression} that takes the associated string representation and returns a substring
+		 * starting at a specified code point index position including the specified number of code points.
 		 *
 		 * @param codePointStart
 		 * @param nrOfCodePoints

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/VariableOperators.java

@@ -127,7 +127,7 @@ public class VariableOperators {
 				}
 
 			};
-		};
+		}
 
 		/**
 		 * Starts building new {@link Map} that applies an {@link AggregationExpression} to each item of a referenced array

spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/aggregation/AggregationTests.java

@@ -58,9 +58,9 @@ import org.springframework.data.mapping.model.MappingException;
 import org.springframework.data.mongodb.core.CollectionCallback;
 import org.springframework.data.mongodb.core.MongoTemplate;
 import org.springframework.data.mongodb.core.Venue;
-import org.springframework.data.mongodb.core.aggregation.VariableOperators.Let.ExpressionVariable;
 import org.springframework.data.mongodb.core.aggregation.AggregationTests.CarDescriptor.Entry;
 import org.springframework.data.mongodb.core.aggregation.BucketAutoOperation.Granularities;
+import org.springframework.data.mongodb.core.aggregation.VariableOperators.Let.ExpressionVariable;
 import org.springframework.data.mongodb.core.index.GeospatialIndex;
 import org.springframework.data.mongodb.core.query.Criteria;
 import org.springframework.data.mongodb.core.query.NearQuery;
@@ -1621,9 +1621,8 @@ public class AggregationTests {
 						.as("finalTotal"));
 
 		AggregationResults<Document> result = mongoTemplate.aggregate(agg, Document.class);
-		assertThat(result.getMappedResults(),
-				contains(new Document("_id", "1").append("finalTotal", 9.450000000000001D),
-						new Document("_id", "2").append("finalTotal", 10.25D)));
+		assertThat(result.getMappedResults(), contains(new Document("_id", "1").append("finalTotal", 9.450000000000001D),
+				new Document("_id", "2").append("finalTotal", 10.25D)));
 	}
 
 	/**