DATAMONGO-1703 - Polishing.

Use lombok's Value for ObjectPathItem. Make methods accessible in DefaultDbRefResolver before calling. Use class.cast to avoid warnings. Update Javadoc.

Original pull request: #478.

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/DefaultDbRefResolver.java

@@ -316,6 +316,8 @@ public class DefaultDbRefResolver implements DbRefResolver {
 				return null;
 			}
 
+			ReflectionUtils.makeAccessible(method);
+
 			return method.invoke(target, args);
 		}
 

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/ObjectPath.java

@@ -15,6 +15,8 @@
  */
 package org.springframework.data.mongodb.core.convert;
 
+import lombok.Value;
+
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
@@ -32,8 +34,8 @@ import com.mongodb.DBObject;
  * when resolving more nested objects. This allows to avoid re-resolving object instances that are logically equivalent
  * to already resolved ones.
  * <p>
- * An immutable ordered set of target objects for {@link DBObject} to {@link Object} conversions. Object paths can be
- * constructed by the {@link #toObjectPath(Object)} method and extended via {@link #push(Object)}.
+ * An immutable ordered set of target objects for {@link DBObject} to {@link Object} conversions. Object paths
+ * can be extended via {@link #push(Object, MongoPersistentEntity, Object)}.
  *
  * @author Thomas Darimont
  * @author Oliver Gierke
@@ -139,7 +141,7 @@ class ObjectPath {
 
 			if (collection.equals(item.getCollection()) && id.equals(item.getIdValue())
 					&& ClassUtils.isAssignable(type, object.getClass())) {
-				return (T) object;
+				return type.cast(object);
 			}
 		}
 
@@ -180,37 +182,13 @@ class ObjectPath {
 	 *
 	 * @author Thomas Darimont
 	 * @author Oliver Gierke
+	 * @author Mark Paluch
 	 */
+	@Value
 	private static class ObjectPathItem {
 
-		private final Object object;
-		private final Object idValue;
-		private final String collection;
-
-		/**
-		 * Creates a new {@link ObjectPathItem}.
-		 *
-		 * @param object
-		 * @param idValue
-		 * @param collection
-		 */
-		ObjectPathItem(Object object, Object idValue, String collection) {
-
-			this.object = object;
-			this.idValue = idValue;
-			this.collection = collection;
-		}
-
-		Object getObject() {
-			return object;
-		}
-
-		Object getIdValue() {
-			return idValue;
-		}
-
-		String getCollection() {
-			return collection;
-		}
+		Object object;
+		Object idValue;
+		String collection;
 	}
 }