org.springframework.data.projection

Class SpelAwareProxyProjectionFactory

java.lang.Object

org.springframework.data.projection.SpelAwareProxyProjectionFactory

All Implemented Interfaces:

Aware, BeanFactoryAware, ResourceLoaderAware, ProjectionFactory

public class SpelAwareProxyProjectionFactory
extends Object
implements BeanFactoryAware

A ProxyProjectionFactory that adds support to use Value-annotated methods on a projection interface to evaluate the contained SpEL expression to define the outcome of the method call.

Since:

1.10

Author:

Oliver Gierke, Thomas Darimont

Constructor Summary

Constructors

Constructor and Description
SpelAwareProxyProjectionFactory()

Method Summary

Modifier and Type	Method and Description
<T> T	createProjection(Class<T> projectionType) Creates a pojection instance for the given type.
<T> T	createProjection(Class<T> projectionType, Object source) Creates a projection of the given type for the given source object.
List<String>	getInputProperties(Class<?> projectionType) Returns the properties that will be consumed by the given projection type.
protected boolean	isInputProperty(PropertyDescriptor descriptor) Returns whether the given PropertyDescriptor describes an input property for the projection, i.e. a property that needs to be present on the source to be able to create reasonable projections for the type the descriptor was looked up on.
protected org.aopalliance.intercept.MethodInterceptor	postProcessAccessorInterceptor(org.aopalliance.intercept.MethodInterceptor interceptor, Object source, Class<?> projectionType) Inspects the given target type for methods with Value annotations and caches the result.
void	setBeanFactory(BeanFactory beanFactory)
void	setResourceLoader(ResourceLoader resourceLoader)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SpelAwareProxyProjectionFactory

public SpelAwareProxyProjectionFactory()

Method Detail

setBeanFactory

public void setBeanFactory(BeanFactory beanFactory)
                    throws BeansException

Specified by:

setBeanFactory in interface BeanFactoryAware

Throws:

BeansException

postProcessAccessorInterceptor

protected org.aopalliance.intercept.MethodInterceptor postProcessAccessorInterceptor(org.aopalliance.intercept.MethodInterceptor interceptor,
                                                                                     Object source,
                                                                                     Class<?> projectionType)

Inspects the given target type for methods with Value annotations and caches the result. Will create a SpelEvaluatingMethodInterceptor if an annotation was found or return the delegate as is if not.

Parameters:

interceptor - the root MethodInterceptor.

source - The backing source object.

projectionType - the proxy target type.

Returns:

isInputProperty

protected boolean isInputProperty(PropertyDescriptor descriptor)

Returns whether the given PropertyDescriptor describes an input property for the projection, i.e. a property that needs to be present on the source to be able to create reasonable projections for the type the descriptor was looked up on.

Parameters:

descriptor - will never be null.

Returns:

setResourceLoader

public void setResourceLoader(ResourceLoader resourceLoader)

Specified by:

setResourceLoader in interface ResourceLoaderAware

createProjection

public <T> T createProjection(Class<T> projectionType,
                              Object source)

Description copied from interface: ProjectionFactory

Creates a projection of the given type for the given source object. The individual mapping strategy is defined by the implementations.

Specified by:

createProjection in interface ProjectionFactory

Parameters:

projectionType - the type to create, must not be null.

source - the object to create a projection for, can be null

Returns:

createProjection

public <T> T createProjection(Class<T> projectionType)

Description copied from interface: ProjectionFactory

Creates a pojection instance for the given type.

Specified by:

createProjection in interface ProjectionFactory

Parameters:

projectionType - the type to create, must not be null.

Returns:

getInputProperties

public List<String> getInputProperties(Class<?> projectionType)

Description copied from interface: ProjectionFactory

Returns the properties that will be consumed by the given projection type.

Specified by:

getInputProperties in interface ProjectionFactory

Parameters:

projectionType - must not be null.

Returns: