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.

Using Method Injection features requires CGLIB on the classpath. However, the core IoC container will still run without CGLIB being available.

Since:

1.1

Author:

Rod Johnson, Juergen Hoeller

Nested Class Summary

private static class

CglibSubclassingInstantiationStrategy.CglibSubclassCreator An inner class so we don't have a CGLIB dependency in core.

Field Summary

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 Methodreplacer 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

CglibSubclassingInstantiationStrategy()

Method Summary

protected java.lang.Object	instantiateWithMethodInjection(RootBeanDefinition beanDefinition, 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 beanDefinition, 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 Methodreplacer functionality.

See Also:

Constant Field Values

Constructor Detail

CglibSubclassingInstantiationStrategy

public CglibSubclassingInstantiationStrategy()

Method Detail

instantiateWithMethodInjection

protected java.lang.Object instantiateWithMethodInjection(RootBeanDefinition beanDefinition,
                                                          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 beanDefinition,
                                                          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