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SGF-407 - Modify the MappingPdxSerializer to allow for extensibility.

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This commit is contained in:
John Blum
2015-06-02 14:41:31 -07:00
parent 0c88727ec8
commit d6dc23a440
3 changed files with 136 additions and 70 deletions
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143
src/main/java/org/springframework/data/gemfire/mapping/MappingPdxSerializer.java
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@@ -15,6 +15,7 @@
*/
package org.springframework.data.gemfire.mapping;
import java.util.Collections;
import java.util.Map;
import org.springframework.beans.BeansException;
@@ -42,16 +43,17 @@ import com.gemstone.gemfire.pdx.PdxWriter;
*
* @author Oliver Gierke
* @author David Turanski
* @author John Blum
*/
public class MappingPdxSerializer implements PdxSerializer, ApplicationContextAware {
private final GemfireMappingContext mappingContext;
private final ConversionService conversionService;
private EntityInstantiators instantiators;
private Map<Class<?>,PdxSerializer> customSerializers;
private final GemfireMappingContext mappingContext;
private Map<Class<?>, PdxSerializer> customSerializers;
private SpELContext context;
@@ -70,6 +72,7 @@ public class MappingPdxSerializer implements PdxSerializer, ApplicationContextAw
this.mappingContext = mappingContext;
this.conversionService = conversionService;
this.instantiators = new EntityInstantiators();
this.customSerializers = Collections.emptyMap();
this.context = new SpELContext(PdxReaderPropertyAccessor.INSTANCE);
}
@@ -81,15 +84,20 @@ public class MappingPdxSerializer implements PdxSerializer, ApplicationContextAw
this(new GemfireMappingContext(), new DefaultConversionService());
}
/**
* Configures the {@link EntityInstantiator}s to be used to create the
* instances to be read.
*
* @param gemfireInstantiators must not be {@literal null}.
/*
* (non-Javadoc)
*
* @see org.springframework.context.ApplicationContextAware#setApplicationContext(
* org.springframework.context.ApplicationContext)
*/
public void setGemfireInstantiators(Map<Class<?>, EntityInstantiator> gemfireInstantiators) {
Assert.notNull(gemfireInstantiators);
this.instantiators = new EntityInstantiators(gemfireInstantiators);
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
this.context = new SpELContext(context, applicationContext);
}
/* (non-Javadoc) */
protected ConversionService getConversionService() {
return conversionService;
}
/**
@@ -98,19 +106,33 @@ public class MappingPdxSerializer implements PdxSerializer, ApplicationContextAw
* @param customSerializers a mapping of domain object class types and their corresponding PDX serializer.
*/
public void setCustomSerializers(Map<Class<?>, PdxSerializer> customSerializers) {
Assert.notNull(customSerializers);
this.customSerializers = customSerializers;
}
/*
* (non-Javadoc)
*
* @see
* org.springframework.context.ApplicationContextAware#setApplicationContext
* (org.springframework.context.ApplicationContext)
/* (non-Javadoc) */
protected Map<Class<?>, PdxSerializer> getCustomSerializers() {
return Collections.unmodifiableMap(customSerializers);
}
/**
* Configures the {@link EntityInstantiator}s used to create the instances read by this PdxSerializer.
*
* @param gemfireInstantiators must not be {@literal null}.
*/
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
this.context = new SpELContext(context, applicationContext);
public void setGemfireInstantiators(Map<Class<?>, EntityInstantiator> gemfireInstantiators) {
Assert.notNull(gemfireInstantiators);
this.instantiators = new EntityInstantiators(gemfireInstantiators);
}
/* (non-Javadoc) */
protected EntityInstantiators getGemfireInstantiators() {
return instantiators;
}
/* (non-Javadoc) */
protected GemfireMappingContext getMappingContext() {
return mappingContext;
}
/*
@@ -121,32 +143,31 @@ public class MappingPdxSerializer implements PdxSerializer, ApplicationContextAw
*/
@Override
public Object fromData(Class<?> type, final PdxReader reader) {
final GemfirePersistentEntity<?> entity = mappingContext.getPersistentEntity(type);
EntityInstantiator instantiator = instantiators.getInstantiatorFor(entity);
GemfirePropertyValueProvider propertyValueProvider = new GemfirePropertyValueProvider(reader);
final GemfirePersistentEntity<?> entity = getPersistentEntity(type);
PersistentEntityParameterValueProvider<GemfirePersistentProperty> provider = new PersistentEntityParameterValueProvider<GemfirePersistentProperty>(
entity, propertyValueProvider, null);
Object instance = instantiator.createInstance(entity, provider);
Object instance = getInstantiatorFor(entity).createInstance(entity,
new PersistentEntityParameterValueProvider<GemfirePersistentProperty>(entity,
new GemfirePropertyValueProvider(reader), null));
final BeanWrapper<Object> wrapper = BeanWrapper.create(instance, conversionService);
final BeanWrapper<Object> wrapper = BeanWrapper.create(instance, getConversionService());
entity.doWithProperties(new PropertyHandler<GemfirePersistentProperty>() {
@Override
public void doWithPersistentProperty(GemfirePersistentProperty persistentProperty) {
if (entity.isConstructorArgument(persistentProperty)) {
return;
}
PdxSerializer customSerializer = getCustomSerializer(persistentProperty.getType());
Object value = null;
Object value;
if (customSerializer != null) {
value = customSerializer.fromData(persistentProperty.getType(), reader);
} else {
}
else {
value = reader.readField(persistentProperty.getName());
}
try {
wrapper.setProperty(persistentProperty, value);
}
@@ -167,25 +188,30 @@ public class MappingPdxSerializer implements PdxSerializer, ApplicationContextAw
*/
@Override
public boolean toData(Object value, final PdxWriter writer) {
GemfirePersistentEntity<?> entity = mappingContext.getPersistentEntity(value.getClass());
final BeanWrapper<Object> wrapper = BeanWrapper.create(value, conversionService);
GemfirePersistentEntity<?> entity = getPersistentEntity(value.getClass());
final BeanWrapper<Object> wrapper = BeanWrapper.create(value, getConversionService());
entity.doWithProperties(new PropertyHandler<GemfirePersistentProperty>() {
@SuppressWarnings({ "unchecked", "rawtypes" })
@Override
@SuppressWarnings("unchecked")
public void doWithPersistentProperty(GemfirePersistentProperty persistentProperty) {
try {
Object propertyValue = wrapper.getProperty(persistentProperty);
PdxSerializer customSerializer = getCustomSerializer(persistentProperty.getType());
if (customSerializer != null) {
customSerializer.toData(propertyValue, writer);
} else {
}
else {
writer.writeField(persistentProperty.getName(), propertyValue, (Class) persistentProperty.getType());
}
}
catch (Exception e) {
throw new MappingException("Could not write value for property " + persistentProperty.toString(), e);
throw new MappingException(String.format("Could not write value for property %1$s",
persistentProperty), e);
}
}
});
@@ -198,8 +224,43 @@ public class MappingPdxSerializer implements PdxSerializer, ApplicationContextAw
return true;
}
private PdxSerializer getCustomSerializer(Class<?> clazz) {
return customSerializers == null ? null : customSerializers.get(clazz);
/**
* Looks up and returns a custom PdxSerializer based on the class type of the object to (de)serialize.
*
* @param type the Class type of the object to (de)serialize.
* @return a "custom" PdxSerializer for the given class type or null if no custom PdxSerializer
* for the given class type was registered.
* @see #getCustomSerializers()
* @see com.gemstone.gemfire.pdx.PdxSerializer
*/
protected PdxSerializer getCustomSerializer(Class<?> type) {
return getCustomSerializers().get(type);
}
/**
* Looks up and returns an EntityInstantiator to construct and initialize an instance of the object defined
* by the given PersistentEntity (meta-data).
*
* @param entity the PersistentEntity object used to lookup the custom EntityInstantiator.
* @return an EntityInstantiator for the given PersistentEntity.
* @see org.springframework.data.convert.EntityInstantiator
* @see org.springframework.data.mapping.PersistentEntity
*/
protected EntityInstantiator getInstantiatorFor(PersistentEntity entity) {
return getGemfireInstantiators().getInstantiatorFor(entity);
}
/**
* Looks up and returns the PersistentEntity meta-data for the given entity class type.
*
* @param entityType the Class type of the actual persistent entity, application domain object class.
* @return the PersistentEntity meta-data for the given entity class type.
* @see #getMappingContext()
* @see org.springframework.data.gemfire.mapping.GemfirePersistentEntity
*/
protected GemfirePersistentEntity<?> getPersistentEntity(Class<?> entityType) {
return getMappingContext().getPersistentEntity(entityType);
}
}