org.springframework.batch.item.adapter
Class AbstractMethodInvokingDelegator

java.lang.Object
  org.springframework.batch.item.adapter.AbstractMethodInvokingDelegator

All Implemented Interfaces:

InitializingBean

Direct Known Subclasses:

ItemReaderAdapter, ItemWriterAdapter, PropertyExtractingDelegatingItemWriter, TaskletAdapter

public class AbstractMethodInvokingDelegator
extends Object
implements InitializingBean

Superclass for delegating classes which dynamically call a custom method of injected object. Provides convenient API for dynamic method invocation shielding subclasses from low-level details and exception handling.

Author:

Robert Kasanicky

Constructor Summary

AbstractMethodInvokingDelegator()

Method Summary

void	afterPropertiesSet()
protected Object	invokeDelegateMethod() Invoker the target method with no arguments.
protected Object	invokeDelegateMethodWithArgument(Object object) Invokes the target method with given argument.
protected Object	invokeDelegateMethodWithArguments(Object[] args) Invokes the target method with given arguments.
void	setArguments(Object[] arguments)
void	setTargetMethod(String targetMethod)
void	setTargetObject(Object targetObject)

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractMethodInvokingDelegator

public AbstractMethodInvokingDelegator()

Method Detail

invokeDelegateMethod

protected Object invokeDelegateMethod()

Invoker the target method with no arguments.

Returns:

object returned by invoked method

Throws:

DynamicMethodInvocationException - if the MethodInvoker used throws exception

invokeDelegateMethodWithArgument

protected Object invokeDelegateMethodWithArgument(Object object)

Invokes the target method with given argument.

Parameters:

object - argument for the target method

Returns:

object returned by target method

Throws:

DynamicMethodInvocationException - if the MethodInvoker used throws exception

invokeDelegateMethodWithArguments

protected Object invokeDelegateMethodWithArguments(Object[] args)

Invokes the target method with given arguments.

Parameters:

args - arguments for the invoked method

Returns:

object returned by invoked method

Throws:

DynamicMethodInvocationException - if the MethodInvoker used throws exception

afterPropertiesSet

public void afterPropertiesSet()
                        throws Exception

Specified by:

afterPropertiesSet in interface InitializingBean

Throws:

Exception

setTargetObject

public void setTargetObject(Object targetObject)

Parameters:

targetObject - the delegate - bean id can be used to set this value in Spring configuration

setTargetMethod

public void setTargetMethod(String targetMethod)

Parameters:

targetMethod - name of the method to be invoked on setTargetObject(Object).

setArguments

public void setArguments(Object[] arguments)

Parameters:

arguments - arguments values for the {setTargetMethod(String). These are not expected to change during the lifetime of the delegator and will be used only when the subclass tries to invoke the target method without providing explicit argument values.