org.springframework.integration.handler.annotation
Class MethodArgumentMessageMapper<T>

java.lang.Object
  org.springframework.integration.handler.annotation.MethodArgumentMessageMapper<T>

All Implemented Interfaces:

MessageMapper<T,java.lang.Object[]>

public class MethodArgumentMessageMapper<T>
extends java.lang.Object
implements MessageMapper<T,java.lang.Object[]>

Prepares arguments for handler methods. The method parameters are matched against the Message payload as well as its headers. If a method parameter is annotated with @Header, the annotation's value will be used as a header name. If such an annotation contains no value, then the parameter name will be used as long as the information is available in the class file (requires compilation with debug settings for parameter names). If the @Header annotation is not present, then the parameter will typically match the Message payload. However, if a Map or Properties object is expected, and the paylaod is not itself assignable to that type, then the MessageHeaders' values will be passed in the case of a Map-typed parameter, or the MessageHeaders' String-based values will be passed in the case of a Properties-typed parameter.

Author:

Mark Fisher

Nested Class Summary

private static class

MethodArgumentMessageMapper.MethodParameterMetadata

Field Summary

private java.lang.reflect.Method	method
private MethodArgumentMessageMapper.MethodParameterMetadata[]	parameterMetadata
private org.springframework.core.ParameterNameDiscoverer	parameterNameDiscoverer

Constructor Summary

MethodArgumentMessageMapper(java.lang.reflect.Method method)

Method Summary

private java.util.Properties	getStringTypedHeaders(Message<?> message)
private void	initializeParameterMetadata()
java.lang.Object[]	mapMessage(Message<T> message) Map from the given Message to an Object.
private java.lang.String	resolveParameterNameIfNecessary(java.lang.String paramName, org.springframework.core.MethodParameter methodParam)

Methods inherited from class java.lang.Object

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

Field Detail

method

private final java.lang.reflect.Method method

parameterMetadata

private volatile MethodArgumentMessageMapper.MethodParameterMetadata[] parameterMetadata

parameterNameDiscoverer

private final org.springframework.core.ParameterNameDiscoverer parameterNameDiscoverer

Constructor Detail

MethodArgumentMessageMapper

public MethodArgumentMessageMapper(java.lang.reflect.Method method)

Method Detail

mapMessage

public java.lang.Object[] mapMessage(Message<T> message)

Description copied from interface: MessageMapper

Map from the given Message to an Object.

Specified by:

mapMessage in interface MessageMapper<T,java.lang.Object[]>

initializeParameterMetadata

private void initializeParameterMetadata()

getStringTypedHeaders

private java.util.Properties getStringTypedHeaders(Message<?> message)

resolveParameterNameIfNecessary

private java.lang.String resolveParameterNameIfNecessary(java.lang.String paramName,
                                                         org.springframework.core.MethodParameter methodParam)