DATACMNS-809 - Add Class-generating property accessor factory.

We now support generated PersistentPropertyAccessors when using Java 7 and if property/association name hashCodes are unique within a PersistentEntity.
Generated PersistentPropertyAccessors provide optimized access to properties. They use either MethodHandles or direct property/field access, depending on the visibility/final modifiers of the entity type and its members. A generated PersistentPropertyAccessor is injected into the originating class loader of the entity class to enable optimizations for package-default/protected member access.

Original pull request: #159.

src/main/java/org/springframework/data/mapping/model/BasicPersistentEntity.java

@@ -45,12 +45,13 @@ import org.springframework.util.StringUtils;
 
 /**
  * Simple value object to capture information of {@link PersistentEntity}s.
- * 
+ *
  * @author Oliver Gierke
  * @author Jon Brisbin
  * @author Patryk Wasik
  * @author Thomas Darimont
  * @author Christoph Strobl
+ * @author Mark Paluch
  */
 public class BasicPersistentEntity<T, P extends PersistentProperty<P>> implements MutablePersistentEntity<T, P> {
 
@@ -66,9 +67,11 @@ public class BasicPersistentEntity<T, P extends PersistentProperty<P>> implement
 	private P idProperty;
 	private P versionProperty;
 
+	private final PersistentPropertyAccessorFactory propertyAccessorFactory;
+
 	/**
 	 * Creates a new {@link BasicPersistentEntity} from the given {@link TypeInformation}.
-	 * 
+	 *
 	 * @param information must not be {@literal null}.
 	 */
 	public BasicPersistentEntity(TypeInformation<T> information) {
@@ -79,7 +82,7 @@ public class BasicPersistentEntity<T, P extends PersistentProperty<P>> implement
 	 * Creates a new {@link BasicPersistentEntity} for the given {@link TypeInformation} and {@link Comparator}. The given
 	 * {@link Comparator} will be used to define the order of the {@link PersistentProperty} instances added to the
 	 * entity.
-	 * 
+	 *
 	 * @param information must not be {@literal null}.
 	 * @param comparator can be {@literal null}.
 	 */
@@ -91,14 +94,15 @@ public class BasicPersistentEntity<T, P extends PersistentProperty<P>> implement
 		this.properties = new ArrayList<P>();
 		this.comparator = comparator;
 		this.constructor = new PreferredConstructorDiscoverer<T, P>(information, this).getConstructor();
-		this.associations = comparator == null ? new HashSet<Association<P>>() : new TreeSet<Association<P>>(
-				new AssociationComparator<P>(comparator));
+		this.associations = comparator == null ? new HashSet<Association<P>>()
+				: new TreeSet<Association<P>>(new AssociationComparator<P>(comparator));
 
 		this.propertyCache = new HashMap<String, P>();
 		this.annotationCache = new HashMap<Class<? extends Annotation>, Annotation>();
+		this.propertyAccessorFactory = new DefaultPersistentPropertyAccessorFactory();
 	}
 
-	/* 
+	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.data.mapping.PersistentEntity#getPersistenceConstructor()
 	 */
@@ -122,7 +126,7 @@ public class BasicPersistentEntity<T, P extends PersistentProperty<P>> implement
 		return this.idProperty == null ? false : this.idProperty.equals(property);
 	}
 
-	/* 
+	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.data.mapping.PersistentEntity#isVersionProperty(org.springframework.data.mapping.PersistentProperty)
 	 */
@@ -146,7 +150,7 @@ public class BasicPersistentEntity<T, P extends PersistentProperty<P>> implement
 		return idProperty;
 	}
 
-	/* 
+	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.data.mapping.PersistentEntity#getVersionProperty()
 	 */
@@ -154,7 +158,7 @@ public class BasicPersistentEntity<T, P extends PersistentProperty<P>> implement
 		return versionProperty;
 	}
 
-	/* 
+	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.data.mapping.PersistentEntity#hasIdProperty()
 	 */
@@ -162,7 +166,7 @@ public class BasicPersistentEntity<T, P extends PersistentProperty<P>> implement
 		return idProperty != null;
 	}
 
-	/* 
+	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.data.mapping.PersistentEntity#hasVersionProperty()
 	 */
@@ -170,7 +174,7 @@ public class BasicPersistentEntity<T, P extends PersistentProperty<P>> implement
 		return versionProperty != null;
 	}
 
-	/* 
+	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.data.mapping.MutablePersistentEntity#addPersistentProperty(P)
 	 */
@@ -197,9 +201,11 @@ public class BasicPersistentEntity<T, P extends PersistentProperty<P>> implement
 		if (property.isVersionProperty()) {
 
 			if (this.versionProperty != null) {
-				throw new MappingException(String.format(
-						"Attempt to add version property %s but already have property %s registered "
-								+ "as version. Check your mapping configuration!", property.getField(), versionProperty.getField()));
+				throw new MappingException(
+						String.format(
+								"Attempt to add version property %s but already have property %s registered "
+										+ "as version. Check your mapping configuration!",
+								property.getField(), versionProperty.getField()));
 			}
 
 			this.versionProperty = property;
@@ -208,7 +214,7 @@ public class BasicPersistentEntity<T, P extends PersistentProperty<P>> implement
 
 	/**
 	 * Returns the given property if it is a better candidate for the id property than the current id property.
-	 * 
+	 *
 	 * @param property the new id property candidate, will never be {@literal null}.
 	 * @return the given id property or {@literal null} if the given property is not an id property.
 	 */
@@ -244,7 +250,7 @@ public class BasicPersistentEntity<T, P extends PersistentProperty<P>> implement
 		return propertyCache.get(name);
 	}
 
-	/* 
+	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.data.mapping.PersistentEntity#getPersistentProperty(java.lang.Class)
 	 */
@@ -279,7 +285,7 @@ public class BasicPersistentEntity<T, P extends PersistentProperty<P>> implement
 		return information.getType();
 	}
 
-	/* 
+	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.data.mapping.PersistentEntity#getTypeAlias()
 	 */
@@ -312,7 +318,7 @@ public class BasicPersistentEntity<T, P extends PersistentProperty<P>> implement
 		}
 	}
 
-	/* 
+	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.data.mapping.PersistentEntity#doWithProperties(org.springframework.data.mapping.PropertyHandler.Simple)
 	 */
@@ -354,7 +360,7 @@ public class BasicPersistentEntity<T, P extends PersistentProperty<P>> implement
 		}
 	}
 
-	/* 
+	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.data.mapping.PersistentEntity#findAnnotation(java.lang.Class)
 	 */
@@ -372,7 +378,7 @@ public class BasicPersistentEntity<T, P extends PersistentProperty<P>> implement
 		return annotation;
 	}
 
-	/* 
+	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.data.mapping.MutablePersistentEntity#verify()
 	 */
@@ -383,7 +389,7 @@ public class BasicPersistentEntity<T, P extends PersistentProperty<P>> implement
 		}
 	}
 
-	/* 
+	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.data.mapping.PersistentEntity#getPropertyAccessor(java.lang.Object)
 	 */
@@ -393,10 +399,10 @@ public class BasicPersistentEntity<T, P extends PersistentProperty<P>> implement
 		Assert.notNull(bean, "Target bean must not be null!");
 		Assert.isTrue(getType().isInstance(bean), "Target bean is not of type of the persistent entity!");
 
-		return new BeanWrapper<Object>(bean);
+		return propertyAccessorFactory.getPropertyAccessor(this, bean);
 	}
 
-	/* 
+	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.data.mapping.PersistentEntity#getIdentifierAccessor(java.lang.Object)
 	 */
@@ -419,7 +425,7 @@ public class BasicPersistentEntity<T, P extends PersistentProperty<P>> implement
 
 		INSTANCE;
 
-		/* 
+		/*
 		 * (non-Javadoc)
 		 * @see org.springframework.data.mapping.IdentifierAccessor#getIdentifier()
 		 */
@@ -431,11 +437,11 @@ public class BasicPersistentEntity<T, P extends PersistentProperty<P>> implement
 
 	/**
 	 * Simple {@link Comparator} adaptor to delegate ordering to the inverse properties of the association.
-	 * 
+	 *
 	 * @author Oliver Gierke
 	 */
-	private static final class AssociationComparator<P extends PersistentProperty<P>> implements
-			Comparator<Association<P>>, Serializable {
+	private static final class AssociationComparator<P extends PersistentProperty<P>>
+			implements Comparator<Association<P>>, Serializable {
 
 		private static final long serialVersionUID = 4508054194886854513L;
 		private final Comparator<P> delegate;

src/main/java/org/springframework/data/mapping/model/DefaultPersistentPropertyAccessorFactory.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.data.mapping.model;
+
+import org.springframework.data.mapping.PersistentEntity;
+import org.springframework.data.mapping.PersistentPropertyAccessor;
+
+/**
+ * Default implementation of {@link PersistentPropertyAccessorFactory}. Accessors can access bean properties either via
+ * reflection or use generated classes with direct field/method access.
+ * 
+ * @author Mark Paluch
+ * @since 1.13
+ */
+public class DefaultPersistentPropertyAccessorFactory implements PersistentPropertyAccessorFactory {
+
+	private final ClassGeneratingPropertyAccessorFactory classGeneratingPropertyAccessorFactory = new ClassGeneratingPropertyAccessorFactory();
+
+	/* (non-Javadoc)
+	 * @see org.springframework.data.mapping.model.PersistentPropertyAccessorFactory#getPropertyAccessor(org.springframework.data.mapping.PersistentEntity, java.lang.Object)
+	 */
+	@Override
+	public PersistentPropertyAccessor getPropertyAccessor(PersistentEntity<?, ?> entity, Object bean) {
+
+		if (ClassGeneratingPropertyAccessorFactory.canGenerateAccessorClass(entity)) {
+			return classGeneratingPropertyAccessorFactory.getPropertyAccessor(entity, bean);
+		}
+		return new BeanWrapper<Object>(bean);
+	}
+
+}

src/main/java/org/springframework/data/mapping/model/PersistentPropertyAccessorFactory.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.data.mapping.model;
+
+import org.springframework.data.mapping.PersistentEntity;
+import org.springframework.data.mapping.PersistentPropertyAccessor;
+
+/**
+ * Factory to create {@link PersistentPropertyAccessor} for a given {@link PersistentEntity} and {@code bean}.
+ * 
+ * @author Mark Paluch
+ * @since 1.13
+ */
+public interface PersistentPropertyAccessorFactory {
+
+	/**
+	 * Returns a {@link PersistentPropertyAccessor} for a given {@link PersistentEntity} and {@code bean}.
+	 * 
+	 * @param bean
+	 * @return
+	 */
+	PersistentPropertyAccessor getPropertyAccessor(PersistentEntity<?, ?> entity, Object bean);
+
+}

src/test/java/org/springframework/data/mapping/model/BasicPersistentEntityUnitTests.java

@@ -17,6 +17,7 @@ package org.springframework.data.mapping.model;
 
 import static org.hamcrest.CoreMatchers.*;
 import static org.junit.Assert.*;
+import static org.junit.Assume.assumeThat;
 import static org.mockito.Mockito.*;
 
 import java.lang.annotation.Retention;
@@ -25,6 +26,7 @@ import java.util.Comparator;
 import java.util.Iterator;
 import java.util.List;
 
+import org.hamcrest.CoreMatchers;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
@@ -49,7 +51,7 @@ import org.springframework.test.util.ReflectionTestUtils;
 
 /**
  * Unit test for {@link BasicPersistentEntity}.
- * 
+ *
  * @author Oliver Gierke
  * @author Christoph Strobl
  */
@@ -181,6 +183,8 @@ public class BasicPersistentEntityUnitTests<T extends PersistentProperty<T>> {
 	@Test
 	public void returnsBeanWrapperForPropertyAccessor() {
 
+		assumeThat(System.getProperty("java.version"), CoreMatchers.startsWith("1.6"));
+
 		SampleMappingContext context = new SampleMappingContext();
 		PersistentEntity<Object, SamplePersistentProperty> entity = context.getPersistentEntity(Entity.class);
 
@@ -191,6 +195,25 @@ public class BasicPersistentEntityUnitTests<T extends PersistentProperty<T>> {
 		assertThat(accessor.getBean(), is((Object) value));
 	}
 
+	/**
+	 * @see DATACMNS-809
+	 */
+	@Test
+	public void returnsGeneratedPropertyAccessorForPropertyAccessor() {
+
+		assumeThat(System.getProperty("java.version"), not(CoreMatchers.startsWith("1.6")));
+
+		SampleMappingContext context = new SampleMappingContext();
+		PersistentEntity<Object, SamplePersistentProperty> entity = context.getPersistentEntity(Entity.class);
+
+		Entity value = new Entity();
+		PersistentPropertyAccessor accessor = entity.getPropertyAccessor(value);
+
+		assertThat(accessor, is(not(instanceOf(BeanWrapper.class))));
+		assertThat(accessor.getClass().getName(), containsString("_Accessor_"));
+		assertThat(accessor.getBean(), is((Object) value));
+	}
+
 	/**
 	 * @see DATACMNS-596
 	 */

src/test/java/org/springframework/data/mapping/model/ClassGeneratingPropertyAccessorFactoryDatatypeTests.java

@@ -0,0 +1,247 @@
+/*
+ * Copyright 2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.data.mapping.model;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.Matchers.equalTo;
+import static org.junit.Assert.*;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameters;
+import org.springframework.data.annotation.AccessType;
+import org.springframework.data.annotation.AccessType.Type;
+import org.springframework.data.mapping.PersistentProperty;
+import org.springframework.data.mapping.PersistentPropertyAccessor;
+import org.springframework.data.mapping.context.SampleMappingContext;
+import org.springframework.data.mapping.context.SamplePersistentProperty;
+
+import lombok.Data;
+
+/**
+ * Unit tests for {@link ClassGeneratingPropertyAccessorFactory}
+ *
+ * @author Mark Paluch
+ * @see DATACMNS-809
+ */
+@RunWith(Parameterized.class)
+public class ClassGeneratingPropertyAccessorFactoryDatatypeTests {
+
+	private final ClassGeneratingPropertyAccessorFactory factory = new ClassGeneratingPropertyAccessorFactory();
+	private final SampleMappingContext mappingContext = new SampleMappingContext();
+
+	private Object bean;
+	private String propertyName;
+	private Object value;
+
+	public ClassGeneratingPropertyAccessorFactoryDatatypeTests(Object bean, String propertyName, Object value,
+			String displayName) {
+
+		this.bean = bean;
+		this.propertyName = propertyName;
+		this.value = value;
+	}
+
+	@Parameters(name = "{3}")
+	public static List<Object[]> parameters() throws Exception {
+
+		List<Object[]> parameters = new ArrayList<Object[]>();
+
+		List<Class<?>> types = Arrays.asList(FieldAccess.class, PropertyAccess.class);
+
+		parameters.addAll(parameters(types, "primitiveInteger", Integer.valueOf(1)));
+		parameters.addAll(parameters(types, "primitiveIntegerArray", new int[] { 1, 2, 3 }));
+		parameters.addAll(parameters(types, "boxedInteger", Integer.valueOf(1)));
+		parameters.addAll(parameters(types, "boxedIntegerArray", new Integer[] { Integer.valueOf(1) }));
+		parameters.addAll(parameters(types, "primitiveShort", Short.valueOf("1")));
+		parameters.addAll(parameters(types, "primitiveShortArray", new short[] { 1, 2, 3 }));
+		parameters.addAll(parameters(types, "boxedShort", Short.valueOf("1")));
+		parameters.addAll(parameters(types, "boxedShortArray", new Short[] { Short.valueOf("1") }));
+		parameters.addAll(parameters(types, "primitiveByte", Byte.valueOf("1")));
+		parameters.addAll(parameters(types, "primitiveByteArray", new byte[] { 1, 2, 3 }));
+		parameters.addAll(parameters(types, "boxedByte", Byte.valueOf("1")));
+		parameters.addAll(parameters(types, "boxedByteArray", new Byte[] { Byte.valueOf("1") }));
+		parameters.addAll(parameters(types, "primitiveChar", Character.valueOf('c')));
+		parameters.addAll(parameters(types, "primitiveCharArray", new char[] { 'a', 'b', 'c' }));
+		parameters.addAll(parameters(types, "boxedChar", Character.valueOf('c')));
+		parameters.addAll(parameters(types, "boxedCharArray", new Character[] { Character.valueOf('c') }));
+		parameters.addAll(parameters(types, "primitiveBoolean", Boolean.valueOf(true)));
+		parameters.addAll(parameters(types, "primitiveBooleanArray", new boolean[] { true, false }));
+		parameters.addAll(parameters(types, "boxedBoolean", Boolean.valueOf(true)));
+		parameters.addAll(parameters(types, "boxedBooleanArray", new Boolean[] { Boolean.valueOf(true) }));
+		parameters.addAll(parameters(types, "primitiveFloat", Float.valueOf(1f)));
+		parameters.addAll(parameters(types, "primitiveFloatArray", new float[] { 1f, 2f }));
+		parameters.addAll(parameters(types, "boxedFloat", Float.valueOf(1f)));
+		parameters.addAll(parameters(types, "boxedFloatArray", new Float[] { Float.valueOf(1f) }));
+		parameters.addAll(parameters(types, "primitiveDouble", Double.valueOf(1d)));
+		parameters.addAll(parameters(types, "primitiveDoubleArray", new double[] { 1d, 2d }));
+		parameters.addAll(parameters(types, "boxedDouble", Double.valueOf(1d)));
+		parameters.addAll(parameters(types, "boxedDoubleArray", new Double[] { Double.valueOf(1d) }));
+		parameters.addAll(parameters(types, "primitiveLong", Long.valueOf(1L)));
+		parameters.addAll(parameters(types, "primitiveLongArray", new long[] { 1L, 2L }));
+		parameters.addAll(parameters(types, "boxedLong", Long.valueOf(1L)));
+		parameters.addAll(parameters(types, "boxedLongArray", new Long[] { Long.valueOf(1L) }));
+		parameters.addAll(parameters(types, "string", "hello"));
+		parameters.addAll(parameters(types, "stringArray", new String[] { "hello", "world" }));
+
+		return parameters;
+	}
+
+	private static List<Object[]> parameters(List<Class<?>> types, String propertyName, Object value) throws Exception {
+
+		List<Object[]> parameters = new ArrayList<Object[]>();
+
+		for (Class<?> type : types) {
+			parameters
+					.add(new Object[] { type.newInstance(), propertyName, value, type.getSimpleName() + "/" + propertyName });
+		}
+
+		return parameters;
+	}
+
+	/**
+	 * @see DATACMNS-809
+	 * @throws Exception
+	 */
+	@Test
+	public void shouldSetAndGetProperty() throws Exception {
+
+		PersistentProperty<?> property = getProperty(bean, propertyName);
+		PersistentPropertyAccessor persistentPropertyAccessor = getPersistentPropertyAccessor(bean);
+
+		persistentPropertyAccessor.setProperty(property, value);
+		assertThat(persistentPropertyAccessor.getProperty(property), is(equalTo((Object) value)));
+	}
+
+	private PersistentPropertyAccessor getPersistentPropertyAccessor(Object bean) {
+		return factory.getPropertyAccessor(mappingContext.getPersistentEntity(bean.getClass()), bean);
+	}
+
+	private PersistentProperty<?> getProperty(Object bean, String name) {
+
+		BasicPersistentEntity<Object, SamplePersistentProperty> persistentEntity = mappingContext
+				.getPersistentEntity(bean.getClass());
+		return persistentEntity.getPersistentProperty(name);
+	}
+
+	/**
+	 * @see DATACMNS-809
+	 */
+	@AccessType(Type.FIELD)
+	public static class FieldAccess {
+
+		int primitiveInteger;
+		int primitiveIntegerArray[];
+		Integer boxedInteger;
+		Integer boxedIntegerArray[];
+
+		short primitiveShort;
+		short primitiveShortArray[];
+		Short boxedShort;
+		Short boxedShortArray[];
+
+		byte primitiveByte;
+		byte primitiveByteArray[];
+		Byte boxedByte;
+		Byte boxedByteArray[];
+
+		char primitiveChar;
+		char primitiveCharArray[];
+		Character boxedChar;
+		Character boxedCharArray[];
+
+		boolean primitiveBoolean;
+		boolean primitiveBooleanArray[];
+		Boolean boxedBoolean;
+		Boolean boxedBooleanArray[];
+
+		float primitiveFloat;
+		float primitiveFloatArray[];
+		Float boxedFloat;
+		Float boxedFloatArray[];
+
+		double primitiveDouble;
+		double primitiveDoubleArray[];
+		Double boxedDouble;
+		Double boxedDoubleArray[];
+
+		long primitiveLong;
+		long primitiveLongArray[];
+		Long boxedLong;
+		Long boxedLongArray[];
+
+		String string;
+		String stringArray[];
+	}
+
+	/**
+	 * @see DATACMNS-809
+	 */
+	@AccessType(Type.PROPERTY)
+	@Data
+	public static class PropertyAccess {
+
+		int primitiveInteger;
+		int primitiveIntegerArray[];
+		Integer boxedInteger;
+		Integer boxedIntegerArray[];
+
+		short primitiveShort;
+		short primitiveShortArray[];
+		Short boxedShort;
+		Short boxedShortArray[];
+
+		byte primitiveByte;
+		byte primitiveByteArray[];
+		Byte boxedByte;
+		Byte boxedByteArray[];
+
+		char primitiveChar;
+		char primitiveCharArray[];
+		Character boxedChar;
+		Character boxedCharArray[];
+
+		boolean primitiveBoolean;
+		boolean primitiveBooleanArray[];
+		Boolean boxedBoolean;
+		Boolean boxedBooleanArray[];
+
+		float primitiveFloat;
+		float primitiveFloatArray[];
+		Float boxedFloat;
+		Float boxedFloatArray[];
+
+		double primitiveDouble;
+		double primitiveDoubleArray[];
+		Double boxedDouble;
+		Double boxedDoubleArray[];
+
+		long primitiveLong;
+		long primitiveLongArray[];
+		Long boxedLong;
+		Long boxedLongArray[];
+
+		String string;
+		String stringArray[];
+	}
+
+}

src/test/java/org/springframework/data/mapping/model/ClassGeneratingPropertyAccessorFactoryTests.java

@@ -0,0 +1,433 @@
+/*
+ * Copyright 2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.data.mapping.model;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.Matchers.equalTo;
+import static org.junit.Assert.*;
+
+import java.lang.reflect.Constructor;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameters;
+import org.springframework.data.annotation.AccessType;
+import org.springframework.data.annotation.AccessType.Type;
+import org.springframework.data.mapping.PersistentProperty;
+import org.springframework.data.mapping.PersistentPropertyAccessor;
+import org.springframework.data.mapping.context.SampleMappingContext;
+import org.springframework.data.mapping.context.SamplePersistentProperty;
+import org.springframework.data.mapping.model.subpackage.TypeInOtherPackage;
+
+/**
+ * Unit tests for {@link ClassGeneratingPropertyAccessorFactory}
+ *
+ * @author Mark Paluch
+ * @see DATACMNS-809
+ */
+@RunWith(Parameterized.class)
+public class ClassGeneratingPropertyAccessorFactoryTests {
+
+	private final ClassGeneratingPropertyAccessorFactory factory = new ClassGeneratingPropertyAccessorFactory();
+	private final SampleMappingContext mappingContext = new SampleMappingContext();
+
+	private Object bean;
+	private String propertyName;
+	private Class<?> expectedConstructorType;
+
+	public ClassGeneratingPropertyAccessorFactoryTests(Object bean, String propertyName, Class<?> expectedConstructorType,
+			String displayName) {
+
+		this.bean = bean;
+		this.propertyName = propertyName;
+		this.expectedConstructorType = expectedConstructorType;
+	}
+
+	@Parameters(name = "{3}")
+	public static List<Object[]> parameters() {
+
+		List<Object[]> parameters = new ArrayList<Object[]>();
+
+		List<String> propertyNames = Arrays.asList("privateField", "packageDefaultField", "protectedField", "publicField",
+				"privateProperty", "packageDefaultProperty", "protectedProperty", "publicProperty", "syntheticProperty");
+		parameters.addAll(parameters(new InnerPrivateType(), propertyNames, Object.class));
+		parameters.addAll(parameters(new InnerTypeWithPrivateAncesor(), propertyNames, InnerTypeWithPrivateAncesor.class));
+		parameters.addAll(parameters(new InnerPackageDefaultType(), propertyNames, InnerPackageDefaultType.class));
+		parameters.addAll(parameters(new InnerProtectedType(), propertyNames, InnerProtectedType.class));
+		parameters.addAll(parameters(new InnerPublicType(), propertyNames, InnerPublicType.class));
+		parameters.addAll(parameters(new ClassGeneratingPropertyAccessorPackageDefaultType(), propertyNames,
+				ClassGeneratingPropertyAccessorPackageDefaultType.class));
+		parameters.addAll(parameters(new ClassGeneratingPropertyAccessorPublicType(), propertyNames,
+				ClassGeneratingPropertyAccessorPublicType.class));
+		parameters.addAll(parameters(new SubtypeOfTypeInOtherPackage(), propertyNames,
+				SubtypeOfTypeInOtherPackage.class));
+
+		return parameters;
+	}
+
+	private static List<Object[]> parameters(Object bean, List<String> propertyNames, Class<?> expectedConstructorType) {
+
+		List<Object[]> parameters = new ArrayList<Object[]>();
+
+		for (String propertyName : propertyNames) {
+			parameters.add(new Object[] { bean, propertyName, expectedConstructorType,
+					bean.getClass().getSimpleName() + "/" + propertyName });
+		}
+
+		return parameters;
+	}
+
+	/**
+	 * @see DATACMNS-809
+	 * @throws Exception
+	 */
+	@Test
+	public void shouldSetAndGetProperty() throws Exception {
+
+		PersistentProperty<?> property = getProperty(bean, propertyName);
+		PersistentPropertyAccessor persistentPropertyAccessor = getPersistentPropertyAccessor(bean);
+
+		persistentPropertyAccessor.setProperty(property, "value");
+		assertThat(persistentPropertyAccessor.getProperty(property), is(equalTo((Object) "value")));
+	}
+
+	/**
+	 * @see DATACMNS-809
+	 * @throws Exception
+	 */
+	@Test
+	public void accessorShouldDeclareConstructor() throws Exception {
+
+		PersistentPropertyAccessor persistentPropertyAccessor = getPersistentPropertyAccessor(bean);
+
+		Constructor<?>[] declaredConstructors = persistentPropertyAccessor.getClass().getDeclaredConstructors();
+		assertThat(declaredConstructors.length, is(1));
+		assertThat(declaredConstructors[0].getParameterTypes().length, is(1));
+		assertThat(declaredConstructors[0].getParameterTypes()[0], is(equalTo((Class) expectedConstructorType)));
+	}
+
+	/**
+	 * @see DATACMNS-809
+	 */
+	@Test(expected = IllegalArgumentException.class)
+	public void shouldFailOnNullBean() {
+		factory.getPropertyAccessor(mappingContext.getPersistentEntity(bean.getClass()), null);
+	}
+
+	/**
+	 * @see DATACMNS-809
+	 */
+	@Test(expected = UnsupportedOperationException.class)
+	public void getPropertyShouldFailOnUnhandledProperty() {
+
+		PersistentProperty<?> property = getProperty(new Dummy(), "dummy");
+		PersistentPropertyAccessor persistentPropertyAccessor = getPersistentPropertyAccessor(bean);
+
+		persistentPropertyAccessor.getProperty(property);
+	}
+
+	/**
+	 * @see DATACMNS-809
+	 */
+	@Test(expected = UnsupportedOperationException.class)
+	public void setPropertyShouldFailOnUnhandledProperty() {
+
+		PersistentProperty<?> property = getProperty(new Dummy(), "dummy");
+		PersistentPropertyAccessor persistentPropertyAccessor = getPersistentPropertyAccessor(bean);
+
+		persistentPropertyAccessor.setProperty(property, null);
+	}
+
+	private PersistentPropertyAccessor getPersistentPropertyAccessor(Object bean) {
+		return factory.getPropertyAccessor(mappingContext.getPersistentEntity(bean.getClass()), bean);
+	}
+
+	private PersistentProperty<?> getProperty(Object bean, String name) {
+
+		BasicPersistentEntity<Object, SamplePersistentProperty> persistentEntity = mappingContext
+				.getPersistentEntity(bean.getClass());
+		return persistentEntity.getPersistentProperty(name);
+	}
+
+	/**
+	 * @see DATACMNS-809
+	 */
+	private static class InnerPrivateType {
+
+		private String privateField;
+		String packageDefaultField;
+		protected String protectedField;
+		public String publicField;
+		private String backing;
+
+		@AccessType(Type.PROPERTY) private String privateProperty;
+
+		@AccessType(Type.PROPERTY) private String packageDefaultProperty;
+
+		@AccessType(Type.PROPERTY) private String protectedProperty;
+
+		@AccessType(Type.PROPERTY) private String publicProperty;
+
+		private String getPrivateProperty() {
+			return privateProperty;
+		}
+
+		private void setPrivateProperty(String privateProperty) {
+			this.privateProperty = privateProperty;
+		}
+
+		String getPackageDefaultProperty() {
+			return packageDefaultProperty;
+		}
+
+		void setPackageDefaultProperty(String packageDefaultProperty) {
+			this.packageDefaultProperty = packageDefaultProperty;
+		}
+
+		protected String getProtectedProperty() {
+			return protectedProperty;
+		}
+
+		protected void setProtectedProperty(String protectedProperty) {
+			this.protectedProperty = protectedProperty;
+		}
+
+		public String getPublicProperty() {
+			return publicProperty;
+		}
+
+		public void setPublicProperty(String publicProperty) {
+			this.publicProperty = publicProperty;
+		}
+
+		@AccessType(Type.PROPERTY)
+		public String getSyntheticProperty() {
+			return backing;
+		}
+
+		public void setSyntheticProperty(String syntheticProperty) {
+			backing = syntheticProperty;
+		}
+	}
+
+	/**
+	 * @see DATACMNS-809
+	 */
+	public static class InnerTypeWithPrivateAncesor extends InnerPrivateType {
+
+	}
+
+	/**
+	 * @see DATACMNS-809
+	 */
+	static class InnerPackageDefaultType {
+
+		private String privateField;
+		String packageDefaultField;
+		protected String protectedField;
+		public String publicField;
+		private String backing;
+
+		@AccessType(Type.PROPERTY) private String privateProperty;
+
+		@AccessType(Type.PROPERTY) private String packageDefaultProperty;
+
+		@AccessType(Type.PROPERTY) private String protectedProperty;
+
+		@AccessType(Type.PROPERTY) private String publicProperty;
+
+		private String getPrivateProperty() {
+			return privateProperty;
+		}
+
+		private void setPrivateProperty(String privateProperty) {
+			this.privateProperty = privateProperty;
+		}
+
+		String getPackageDefaultProperty() {
+			return packageDefaultProperty;
+		}
+
+		void setPackageDefaultProperty(String packageDefaultProperty) {
+			this.packageDefaultProperty = packageDefaultProperty;
+		}
+
+		protected String getProtectedProperty() {
+			return protectedProperty;
+		}
+
+		protected void setProtectedProperty(String protectedProperty) {
+			this.protectedProperty = protectedProperty;
+		}
+
+		public String getPublicProperty() {
+			return publicProperty;
+		}
+
+		public void setPublicProperty(String publicProperty) {
+			this.publicProperty = publicProperty;
+		}
+
+		@AccessType(Type.PROPERTY)
+		public String getSyntheticProperty() {
+			return backing;
+		}
+
+		public void setSyntheticProperty(String syntheticProperty) {
+			backing = syntheticProperty;
+		}
+	}
+
+	/**
+	 * @see DATACMNS-809
+	 */
+	protected static class InnerProtectedType {
+
+		private String privateField;
+		String packageDefaultField;
+		protected String protectedField;
+		public String publicField;
+		private String backing;
+
+		@AccessType(Type.PROPERTY) private String privateProperty;
+
+		@AccessType(Type.PROPERTY) private String packageDefaultProperty;
+
+		@AccessType(Type.PROPERTY) private String protectedProperty;
+
+		@AccessType(Type.PROPERTY) private String publicProperty;
+
+		private String getPrivateProperty() {
+			return privateProperty;
+		}
+
+		private void setPrivateProperty(String privateProperty) {
+			this.privateProperty = privateProperty;
+		}
+
+		String getPackageDefaultProperty() {
+			return packageDefaultProperty;
+		}
+
+		void setPackageDefaultProperty(String packageDefaultProperty) {
+			this.packageDefaultProperty = packageDefaultProperty;
+		}
+
+		protected String getProtectedProperty() {
+			return protectedProperty;
+		}
+
+		protected void setProtectedProperty(String protectedProperty) {
+			this.protectedProperty = protectedProperty;
+		}
+
+		public String getPublicProperty() {
+			return publicProperty;
+		}
+
+		public void setPublicProperty(String publicProperty) {
+			this.publicProperty = publicProperty;
+		}
+
+		@AccessType(Type.PROPERTY)
+		public String getSyntheticProperty() {
+			return backing;
+		}
+
+		public void setSyntheticProperty(String syntheticProperty) {
+			backing = syntheticProperty;
+		}
+	}
+
+	/**
+	 * @see DATACMNS-809
+	 */
+	public static class InnerPublicType {
+
+		private String privateField;
+		String packageDefaultField;
+		protected String protectedField;
+		public String publicField;
+		private String backing;
+
+		@AccessType(Type.PROPERTY) private String privateProperty;
+
+		@AccessType(Type.PROPERTY) private String packageDefaultProperty;
+
+		@AccessType(Type.PROPERTY) private String protectedProperty;
+
+		@AccessType(Type.PROPERTY) private String publicProperty;
+
+		private String getPrivateProperty() {
+			return privateProperty;
+		}
+
+		private void setPrivateProperty(String privateProperty) {
+			this.privateProperty = privateProperty;
+		}
+
+		String getPackageDefaultProperty() {
+			return packageDefaultProperty;
+		}
+
+		void setPackageDefaultProperty(String packageDefaultProperty) {
+			this.packageDefaultProperty = packageDefaultProperty;
+		}
+
+		protected String getProtectedProperty() {
+			return protectedProperty;
+		}
+
+		protected void setProtectedProperty(String protectedProperty) {
+			this.protectedProperty = protectedProperty;
+		}
+
+		public String getPublicProperty() {
+			return publicProperty;
+		}
+
+		public void setPublicProperty(String publicProperty) {
+			this.publicProperty = publicProperty;
+		}
+
+		@AccessType(Type.PROPERTY)
+		public String getSyntheticProperty() {
+			return backing;
+		}
+
+		public void setSyntheticProperty(String syntheticProperty) {
+			backing = syntheticProperty;
+		}
+	}
+
+	public static class SubtypeOfTypeInOtherPackage extends TypeInOtherPackage{
+
+	}
+
+	/**
+	 * @see DATACMNS-809
+	 */
+	private static class Dummy {
+		private String dummy;
+		public String publicField;
+	}
+
+}

src/test/java/org/springframework/data/mapping/model/ClassGeneratingPropertyAccessorPackageDefaultType.java

@@ -0,0 +1,83 @@
+/*
+ * Copyright 2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.data.mapping.model;
+
+import org.springframework.data.annotation.AccessType;
+import org.springframework.data.annotation.AccessType.Type;
+
+/**
+ * @author Mark Paluch
+ * @see DATACMNS-809
+ */
+class ClassGeneratingPropertyAccessorPackageDefaultType {
+
+	private String privateField;
+	String packageDefaultField;
+	protected String protectedField;
+	public String publicField;
+	private String backing;
+
+	@AccessType(Type.PROPERTY) private String privateProperty;
+
+	@AccessType(Type.PROPERTY) private String packageDefaultProperty;
+
+	@AccessType(Type.PROPERTY) private String protectedProperty;
+
+	@AccessType(Type.PROPERTY) private String publicProperty;
+
+	private String getPrivateProperty() {
+		return privateProperty;
+	}
+
+	private void setPrivateProperty(String privateProperty) {
+		this.privateProperty = privateProperty;
+	}
+
+	String getPackageDefaultProperty() {
+		return packageDefaultProperty;
+	}
+
+	void setPackageDefaultProperty(String packageDefaultProperty) {
+		this.packageDefaultProperty = packageDefaultProperty;
+	}
+
+	protected String getProtectedProperty() {
+		return protectedProperty;
+	}
+
+	protected void setProtectedProperty(String protectedProperty) {
+		this.protectedProperty = protectedProperty;
+	}
+
+	public String getPublicProperty() {
+		return publicProperty;
+	}
+
+	public void setPublicProperty(String publicProperty) {
+		this.publicProperty = publicProperty;
+	}
+
+	@AccessType(Type.PROPERTY)
+	public String getSyntheticProperty() {
+		return backing;
+	}
+
+	public void setSyntheticProperty(String syntheticProperty) {
+		backing = syntheticProperty;
+	}
+
+}

src/test/java/org/springframework/data/mapping/model/ClassGeneratingPropertyAccessorPublicType.java

@@ -0,0 +1,94 @@
+/*
+ * Copyright 2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.data.mapping.model;
+
+import org.springframework.data.annotation.AccessType;
+import org.springframework.data.annotation.AccessType.Type;
+
+/**
+ * @author Mark Paluch
+ * @see DATACMNS-809
+ */
+public class ClassGeneratingPropertyAccessorPublicType {
+
+	private String privateField;
+	String packageDefaultField;
+	protected String protectedField;
+	public String publicField;
+	private String backing;
+	private Integer aa;
+	private int bb;
+
+	@AccessType(Type.PROPERTY) private String privateProperty;
+
+	@AccessType(Type.PROPERTY) private String packageDefaultProperty;
+
+	@AccessType(Type.PROPERTY) private String protectedProperty;
+
+	@AccessType(Type.PROPERTY) private String publicProperty;
+
+	private String getPrivateProperty() {
+		return privateProperty;
+	}
+
+	private void setPrivateProperty(String privateProperty) {
+		this.privateProperty = privateProperty;
+	}
+
+	String getPackageDefaultProperty() {
+		return packageDefaultProperty;
+	}
+
+	void setPackageDefaultProperty(String packageDefaultProperty) {
+		this.packageDefaultProperty = packageDefaultProperty;
+	}
+
+	protected String getProtectedProperty() {
+		return protectedProperty;
+	}
+
+	protected void setProtectedProperty(String protectedProperty) {
+		this.protectedProperty = protectedProperty;
+	}
+
+	public String getPublicProperty() {
+		return publicProperty;
+	}
+
+	public void setPublicProperty(String publicProperty) {
+		this.publicProperty = publicProperty;
+	}
+
+	@AccessType(Type.PROPERTY)
+	public String getSyntheticProperty() {
+		return backing;
+	}
+
+	public void setSyntheticProperty(String syntheticProperty) {
+		backing = syntheticProperty;
+	}
+
+	public Object set(Object e) {
+		aa = (Integer) e;
+		bb = (Integer) e;
+		return bb;
+	}
+
+	public static void main(String[] args) {
+
+	}
+}

src/test/java/org/springframework/data/mapping/model/subpackage/TypeInOtherPackage.java

@@ -0,0 +1,82 @@
+/*
+ * Copyright 2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.data.mapping.model.subpackage;
+
+import org.springframework.data.annotation.AccessType;
+import org.springframework.data.annotation.AccessType.Type;
+
+/**
+ * @author Mark Paluch
+ * @see DATACMNS-809
+ */
+public class TypeInOtherPackage {
+
+	private String privateField;
+	String packageDefaultField;
+	protected String protectedField;
+	public String publicField;
+	private String backing;
+
+	@AccessType(Type.PROPERTY) private String privateProperty;
+
+	@AccessType(Type.PROPERTY) private String packageDefaultProperty;
+
+	@AccessType(Type.PROPERTY) private String protectedProperty;
+
+	@AccessType(Type.PROPERTY) private String publicProperty;
+
+	private String getPrivateProperty() {
+		return privateProperty;
+	}
+
+	private void setPrivateProperty(String privateProperty) {
+		this.privateProperty = privateProperty;
+	}
+
+	String getPackageDefaultProperty() {
+		return packageDefaultProperty;
+	}
+
+	void setPackageDefaultProperty(String packageDefaultProperty) {
+		this.packageDefaultProperty = packageDefaultProperty;
+	}
+
+	protected String getProtectedProperty() {
+		return protectedProperty;
+	}
+
+	protected void setProtectedProperty(String protectedProperty) {
+		this.protectedProperty = protectedProperty;
+	}
+
+	public String getPublicProperty() {
+		return publicProperty;
+	}
+
+	public void setPublicProperty(String publicProperty) {
+		this.publicProperty = publicProperty;
+	}
+
+	@AccessType(Type.PROPERTY)
+	public String getSyntheticProperty() {
+		return backing;
+	}
+
+	public void setSyntheticProperty(String syntheticProperty) {
+		backing = syntheticProperty;
+	}
+}