java.lang.Object
- org.springframework.messaging.converter.CompositeMessageConverter

All Implemented Interfaces:
MessageConverter, SmartMessageConverter
```
public class CompositeMessageConverter
extends Object
implements SmartMessageConverter
```
A MessageConverter that delegates to a list of registered converters to be invoked until one of them returns a non-null result.
As of 4.2.1, this composite converter implements SmartMessageConverter in order to support the delegation of conversion hints.
Since:
4.0
Author:
Rossen Stoyanchev, Juergen Hoeller

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

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	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.
`Object`	`fromMessage(Message<?> message, Class<?> targetClass, Object conversionHint)`	A variant of `MessageConverter.fromMessage(Message, Class)` which takes an extra conversion context as an argument, allowing to take e.g.
`List<MessageConverter>`	`getConverters()`	Return the underlying list of delegate converters.
`Message<?>`	`toMessage(Object payload, MessageHeaders headers)`	Create a `Message` whose payload is the result of converting the given payload Object to serialized form.
`Message<?>`	`toMessage(Object payload, MessageHeaders headers, Object conversionHint)`	A variant of `MessageConverter.toMessage(Object, MessageHeaders)` which takes an extra conversion context as an argument, allowing to take e.g.
`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
  - 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
  - fromMessage
```
public Object fromMessage(Message<?> message,
                          Class<?> targetClass,
                          Object conversionHint)
```
    Description copied from interface: SmartMessageConverter
    A variant of MessageConverter.fromMessage(Message, Class) which takes an extra conversion context as an argument, allowing to take e.g. annotations on a payload parameter into account.
    Specified by:
    fromMessage in interface SmartMessageConverter
    Parameters:
    message - the input message
    targetClass - the target class for the conversion
    conversionHint - an extra object passed to the MessageConverter, e.g. the associated MethodParameter (may be null}
    Returns:
    the result of the conversion, or null if the converter cannot perform the conversion
    See Also:
    MessageConverter.fromMessage(Message, Class)
  - 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
  - toMessage
```
public Message<?> toMessage(Object payload,
                            MessageHeaders headers,
                            Object conversionHint)
```
    Description copied from interface: SmartMessageConverter
    A variant of MessageConverter.toMessage(Object, MessageHeaders) which takes an extra conversion context as an argument, allowing to take e.g. annotations on a return type into account.
    Specified by:
    toMessage in interface SmartMessageConverter
    Parameters:
    payload - the Object to convert
    headers - optional headers for the message (may be null)
    conversionHint - an extra object passed to the MessageConverter, e.g. the associated MethodParameter (may be null}
    Returns:
    the new message, or null if the converter does not support the Object type or the target media type
    See Also:
    MessageConverter.toMessage(Object, MessageHeaders)
  - getConverters
```
public List<MessageConverter> getConverters()
```
    Return the underlying list of delegate converters.
  - toString
```
public String toString()
```
    Overrides:
    toString in class Object

Class CompositeMessageConverter

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

CompositeMessageConverter

Method Detail

fromMessage

fromMessage

toMessage

toMessage

getConverters

toString