org.springframework.beans.factory.support

Class CglibSubclassingInstantiationStrategy

java.lang.Object

org.springframework.beans.factory.support.SimpleInstantiationStrategy

org.springframework.beans.factory.support.CglibSubclassingInstantiationStrategy

All Implemented Interfaces:

InstantiationStrategy

public class CglibSubclassingInstantiationStrategy
extends SimpleInstantiationStrategy

Default object instantiation strategy for use in BeanFactories.

Uses CGLIB to generate subclasses dynamically if methods need to be overridden by the container to implement Method Injection.

Since:

1.1

Author:

Rod Johnson, Juergen Hoeller, Sam Brannen

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	CglibSubclassingInstantiationStrategy.CglibIdentitySupport Class providing hashCode and equals methods required by CGLIB to ensure that CGLIB doesn't generate a distinct class per bean.
private static class	CglibSubclassingInstantiationStrategy.CglibSubclassCreator An inner class created for historical reasons to avoid external CGLIB dependency in Spring versions earlier than 3.2.
private static class	CglibSubclassingInstantiationStrategy.ClassLoaderAwareGeneratorStrategy CGLIB GeneratorStrategy variant which exposes the application ClassLoader as thread context ClassLoader for the time of class generation (in order for ASM to pick it up when doing common superclass resolution).
private static class	CglibSubclassingInstantiationStrategy.LookupOverrideMethodInterceptor CGLIB MethodInterceptor to override methods, replacing them with an implementation that returns a bean looked up in the container.
private static class	CglibSubclassingInstantiationStrategy.MethodOverrideCallbackFilter CGLIB callback for filtering method interception behavior.
private static class	CglibSubclassingInstantiationStrategy.ReplaceOverrideMethodInterceptor CGLIB MethodInterceptor to override methods, replacing them with a call to a generic MethodReplacer.

Field Summary

Fields

Modifier and Type	Field and Description
private static int	LOOKUP_OVERRIDE Index in the CGLIB callback array for a method that should be overridden to provide method lookup.
private static int	METHOD_REPLACER Index in the CGLIB callback array for a method that should be overridden using generic method replacer functionality.
private static int	PASSTHROUGH Index in the CGLIB callback array for passthrough behavior, in which case the subclass won't override the original class.

Constructor Summary

Constructors

Constructor and Description
CglibSubclassingInstantiationStrategy()

Method Summary

Modifier and Type	Method and Description
protected java.lang.Object	instantiateWithMethodInjection(RootBeanDefinition bd, java.lang.String beanName, BeanFactory owner) Subclasses can override this method, which is implemented to throw UnsupportedOperationException, if they can instantiate an object with the Method Injection specified in the given RootBeanDefinition.
protected java.lang.Object	instantiateWithMethodInjection(RootBeanDefinition bd, java.lang.String beanName, BeanFactory owner, java.lang.reflect.Constructor<?> ctor, java.lang.Object... args) Subclasses can override this method, which is implemented to throw UnsupportedOperationException, if they can instantiate an object with the Method Injection specified in the given RootBeanDefinition.

Methods inherited from class org.springframework.beans.factory.support.SimpleInstantiationStrategy

getCurrentlyInvokedFactoryMethod, instantiate, instantiate, instantiate

Methods inherited from class java.lang.Object

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

Field Detail

PASSTHROUGH

private static final int PASSTHROUGH

Index in the CGLIB callback array for passthrough behavior, in which case the subclass won't override the original class.

See Also:

Constant Field Values

LOOKUP_OVERRIDE

private static final int LOOKUP_OVERRIDE

Index in the CGLIB callback array for a method that should be overridden to provide method lookup.

See Also:

Constant Field Values

METHOD_REPLACER

private static final int METHOD_REPLACER

Index in the CGLIB callback array for a method that should be overridden using generic method replacer functionality.

See Also:

Constant Field Values

Constructor Detail

CglibSubclassingInstantiationStrategy

public CglibSubclassingInstantiationStrategy()

Method Detail

instantiateWithMethodInjection

protected java.lang.Object instantiateWithMethodInjection(RootBeanDefinition bd,
                                                          java.lang.String beanName,
                                                          BeanFactory owner)

Description copied from class: SimpleInstantiationStrategy

Subclasses can override this method, which is implemented to throw UnsupportedOperationException, if they can instantiate an object with the Method Injection specified in the given RootBeanDefinition. Instantiation should use a no-arg constructor.

Overrides:

instantiateWithMethodInjection in class SimpleInstantiationStrategy

instantiateWithMethodInjection

protected java.lang.Object instantiateWithMethodInjection(RootBeanDefinition bd,
                                                          java.lang.String beanName,
                                                          BeanFactory owner,
                                                          java.lang.reflect.Constructor<?> ctor,
                                                          java.lang.Object... args)

Description copied from class: SimpleInstantiationStrategy

Subclasses can override this method, which is implemented to throw UnsupportedOperationException, if they can instantiate an object with the Method Injection specified in the given RootBeanDefinition. Instantiation should use the given constructor and parameters.

Overrides:

instantiateWithMethodInjection in class SimpleInstantiationStrategy