org.springframework.messaging.converter

Class CompositeMessageConverter

java.lang.Object

org.springframework.messaging.converter.CompositeMessageConverter

All Implemented Interfaces:

MessageConverter

public class CompositeMessageConverter
extends Object
implements MessageConverter

A MessageConverter that delegates to a list of other converters to be invoked until one of them returns a non-null result.

Since:

4.0

Author:

Rossen Stoyanchev

Constructor Summary

Constructors

Constructor and Description
CompositeMessageConverter(Collection<MessageConverter> converters) Create an instance with the given converters.

Method Summary

Modifier and Type	Method and Description
Object	fromMessage(Message<?> message, Class<?> targetClass) Convert the payload of a Message from a serialized form to a typed Object of the specified target class.
List<MessageConverter>	getConverters()
Message<?>	toMessage(Object payload, MessageHeaders headers) Create a Message whose payload is the result of converting the given payload Object to serialized form.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

CompositeMessageConverter

public CompositeMessageConverter(Collection<MessageConverter> converters)

Create an instance with the given converters.

Method Detail

getConverters

public List<MessageConverter> getConverters()

fromMessage

public Object fromMessage(Message<?> message,
                          Class<?> targetClass)

Description copied from interface: MessageConverter

Convert the payload of a Message from a serialized form to a typed Object of the specified target class. The MessageHeaders.CONTENT_TYPE header should indicate the MIME type to convert from.

If the converter does not support the specified media type or cannot perform the conversion, it should return null.

Specified by:

fromMessage in interface MessageConverter

Parameters:

message - the input message

targetClass - the target class for the conversion

Returns:

the result of the conversion, or null if the converter cannot perform the conversion

toMessage

public Message<?> toMessage(Object payload,
                            MessageHeaders headers)

Description copied from interface: MessageConverter

Create a Message whose payload is the result of converting the given payload Object to serialized form. The optional MessageHeaders parameter may contain a MessageHeaders.CONTENT_TYPE header to specify the target media type for the conversion and it may contain additional headers to be added to the message.

If the converter does not support the specified media type or cannot perform the conversion, it should return null.

Specified by:

toMessage in interface MessageConverter

Parameters:

payload - the Object to convert

headers - optional headers for the message (may be null)

Returns:

the new message, or null if the converter does not support the Object type or the target media type

toString

public String toString()

Overrides:

toString in class Object