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 arbitrary objects, with support for argument value type conversion from values retrieved from an argument attribute source, and conversion of the result to a desired type.

Author:

Keith Donald, Jeremy Grelle

Constructor Summary

Constructors

Constructor and Description
MethodInvoker()

Method Summary

Modifier and Type	Method and Description
protected java.lang.Object	applyTypeConversion(java.lang.Object value, java.lang.Class<?> targetType) Apply type conversion on the supplied value
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 value,
                                               java.lang.Class<?> targetType)

Apply type conversion on the supplied value

Parameters:

value - the raw value to be converted

targetType - the target type for the conversion

Returns:

the converted result