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

All Implemented Interfaces:
MessageConverter, SmartMessageConverter
Direct Known Subclasses:
ByteArrayMessageConverter, MappingJackson2MessageConverter, MarshallingMessageConverter, StringMessageConverter
```
public abstract class AbstractMessageConverter
extends Object
implements SmartMessageConverter
```
Abstract base class for SmartMessageConverter implementations including support for common properties and a partial implementation of the conversion methods, mainly to check if the converter supports the conversion based on the payload class and MIME type.
Since:
4.0
Author:
Rossen Stoyanchev, Sebastien Deleuze, Juergen Hoeller

Field Summary
Fields
Modifier and Type Field Description
protected Log logger

Constructor Summary

Constructors
Modifier	Constructor	Description
`protected`	`AbstractMessageConverter(Collection<MimeType> supportedMimeTypes)`	Construct an `AbstractMessageConverter` supporting multiple MIME types.
`protected`	`AbstractMessageConverter(MimeType supportedMimeType)`	Construct an `AbstractMessageConverter` supporting a single MIME type.

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`protected boolean`	`canConvertFrom(Message<?> message, Class<?> targetClass)`
`protected boolean`	`canConvertTo(Object payload, MessageHeaders headers)`
`Object`	`convertFromInternal(Message<?> message, Class<?> targetClass)`	Deprecated. as of Spring 4.2, in favor of `convertFromInternal(Message, Class, Object)` (which is also protected instead of public)
`protected Object`	`convertFromInternal(Message<?> message, Class<?> targetClass, Object conversionHint)`	Convert the message payload from serialized form to an Object.
`Object`	`convertToInternal(Object payload, MessageHeaders headers)`	Deprecated. as of Spring 4.2, in favor of `convertFromInternal(Message, Class, Object)` (which is also protected instead of public)
`protected Object`	`convertToInternal(Object payload, MessageHeaders headers, Object conversionHint)`	Convert the payload object to serialized form.
`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.
`ContentTypeResolver`	`getContentTypeResolver()`	Return the configured `ContentTypeResolver`.
`protected MimeType`	`getDefaultContentType(Object payload)`	Return the default content type for the payload.
`protected MimeType`	`getMimeType(MessageHeaders headers)`
`Class<?>`	`getSerializedPayloadClass()`	Return the configured preferred serialization payload class.
`List<MimeType>`	`getSupportedMimeTypes()`	Return the supported MIME types.
`boolean`	`isStrictContentTypeMatch()`	Whether content type resolution must produce a value that matches one of the supported MIME types.
`void`	`setContentTypeResolver(ContentTypeResolver resolver)`	Configure the `ContentTypeResolver` to use to resolve the content type of an input message.
`void`	`setSerializedPayloadClass(Class<?> payloadClass)`	Configure the preferred serialization class to use (byte[] or String) when converting an Object payload to a `Message`.
`void`	`setStrictContentTypeMatch(boolean strictContentTypeMatch)`	Whether this converter should convert messages for which no content type could be resolved through the configured `ContentTypeResolver`.
`protected abstract boolean`	`supports(Class<?> clazz)`	Whether the given class is supported by this converter.
`protected boolean`	`supportsMimeType(MessageHeaders headers)`
`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.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - logger
```
protected final Log logger
```
- Constructor Detail
  - AbstractMessageConverter
```
protected AbstractMessageConverter(MimeType supportedMimeType)
```
    Construct an AbstractMessageConverter supporting a single MIME type.
    Parameters:
    supportedMimeType - the supported MIME type
  - AbstractMessageConverter
```
protected AbstractMessageConverter(Collection<MimeType> supportedMimeTypes)
```
    Construct an AbstractMessageConverter supporting multiple MIME types.
    Parameters:
    supportedMimeTypes - the supported MIME types
- Method Detail
  - getSupportedMimeTypes
```
public List<MimeType> getSupportedMimeTypes()
```
    Return the supported MIME types.
  - setContentTypeResolver
```
public void setContentTypeResolver(ContentTypeResolver resolver)
```
    Configure the ContentTypeResolver to use to resolve the content type of an input message.
    Note that if no resolver is configured, then strictContentTypeMatch should be left as false (the default) or otherwise this converter will ignore all messages.
    By default, a DefaultContentTypeResolver instance is used.
  - getContentTypeResolver
```
public ContentTypeResolver getContentTypeResolver()
```
    Return the configured ContentTypeResolver.
  - setStrictContentTypeMatch
```
public void setStrictContentTypeMatch(boolean strictContentTypeMatch)
```
    Whether this converter should convert messages for which no content type could be resolved through the configured ContentTypeResolver.
    A converter can configured to be strict only when a contentTypeResolver is configured and the list of supportedMimeTypes is not be empty.
    When this flag is set to true, supportsMimeType(MessageHeaders) will return false if the contentTypeResolver is not defined or if no content-type header is present.
  - isStrictContentTypeMatch
```
public boolean isStrictContentTypeMatch()
```
    Whether content type resolution must produce a value that matches one of the supported MIME types.
  - setSerializedPayloadClass
```
public void setSerializedPayloadClass(Class<?> payloadClass)
```
    Configure the preferred serialization class to use (byte[] or String) when converting an Object payload to a Message.
    The default value is byte[].
    Parameters:
    payloadClass - either byte[] or String
  - getSerializedPayloadClass
```
public Class<?> getSerializedPayloadClass()
```
    Return the configured preferred serialization payload class.
  - fromMessage
```
public final 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 final 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 final 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 final 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)
  - canConvertFrom
```
protected boolean canConvertFrom(Message<?> message,
                                 Class<?> targetClass)
```
  - canConvertTo
```
protected boolean canConvertTo(Object payload,
                               MessageHeaders headers)
```
  - supportsMimeType
```
protected boolean supportsMimeType(MessageHeaders headers)
```
  - getMimeType
```
protected MimeType getMimeType(MessageHeaders headers)
```
  - getDefaultContentType
```
protected MimeType getDefaultContentType(Object payload)
```
    Return the default content type for the payload. Called when toMessage(Object, MessageHeaders) is invoked without message headers or without a content type header.
    By default, this returns the first element of the supportedMimeTypes, if any. Can be overridden in subclasses.
    Parameters:
    payload - the payload being converted to a message
    Returns:
    the content type, or null if not known
  - supports
```
protected abstract boolean supports(Class<?> clazz)
```
    Whether the given class is supported by this converter.
    Parameters:
    clazz - the class to test for support
    Returns:
    true if supported; false otherwise
  - convertFromInternal
```
protected Object convertFromInternal(Message<?> message,
                                     Class<?> targetClass,
                                     Object conversionHint)
```
    Convert the message payload from serialized form to an Object.
    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
    Since:
    4.2
  - convertToInternal
```
protected Object convertToInternal(Object payload,
                                   MessageHeaders headers,
                                   Object conversionHint)
```
    Convert the payload object to serialized form.
    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 resulting payload for the message, or null if the converter cannot perform the conversion
    Since:
    4.2
  - convertFromInternal
```
@Deprecated
public Object convertFromInternal(Message<?> message,
                                  Class<?> targetClass)
```
    Deprecated.
    as of Spring 4.2, in favor of convertFromInternal(Message, Class, Object) (which is also protected instead of public)
    Convert the message payload from serialized form to an Object.
  - convertToInternal
```
@Deprecated
public Object convertToInternal(Object payload,
                                MessageHeaders headers)
```
    Deprecated.
    as of Spring 4.2, in favor of convertFromInternal(Message, Class, Object) (which is also protected instead of public)
    Convert the payload object to serialized form.

Class AbstractMessageConverter

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

logger

Constructor Detail

AbstractMessageConverter

AbstractMessageConverter

Method Detail

getSupportedMimeTypes

setContentTypeResolver

getContentTypeResolver

setStrictContentTypeMatch

isStrictContentTypeMatch

setSerializedPayloadClass

getSerializedPayloadClass

fromMessage

fromMessage

toMessage

toMessage

canConvertFrom

canConvertTo

supportsMimeType

getMimeType

getDefaultContentType

supports

convertFromInternal

convertToInternal

convertFromInternal

convertToInternal