org.springframework.binding.method
Class MethodInvoker

java.lang.Object
  org.springframework.binding.method.MethodInvoker

public class MethodInvoker
extends java.lang.Object

A helper for invoking typed methods on abritrary objects, with support for argument value type conversion from values retrieved from a argument attribute source.

Author:

Keith Donald

Constructor Summary

MethodInvoker()

Method Summary

protected java.lang.Object	applyTypeConversion(java.lang.Object parameterValue, java.lang.Class targetType) Apply type conversion on the event parameter if neccessary
java.lang.Object	invoke(MethodSignature signature, java.lang.Object bean, java.lang.Object argumentSource) Invoke the method on the bean provided.
void	setConversionService(ConversionService conversionService) Sets the conversion service to convert argument values as needed.

Methods inherited from class java.lang.Object

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

Constructor Detail

MethodInvoker

public MethodInvoker()

Method Detail

setConversionService

public void setConversionService(ConversionService conversionService)

Sets the conversion service to convert argument values as needed.

invoke

public java.lang.Object invoke(MethodSignature signature,
                               java.lang.Object bean,
                               java.lang.Object argumentSource)
                        throws MethodInvocationException

Invoke the method on the bean provided. Argument values are pulled from the provided argument source.

Parameters:

signature - the definition of the method to invoke, including the method name and the method argument types

bean - the bean to invoke

argumentSource - the source for method arguments

Returns:

the invoked method's return value

Throws:

MethodInvocationException - the method could not be invoked

applyTypeConversion

protected java.lang.Object applyTypeConversion(java.lang.Object parameterValue,
                                               java.lang.Class targetType)

Apply type conversion on the event parameter if neccessary

Parameters:

parameterValue - the raw argument value

targetType - the target type for the matching method argument

Returns:

the converted method argument