Class JacksonJsonMessageConverter

java.lang.Object

org.springframework.messaging.converter.AbstractMessageConverter

org.springframework.messaging.converter.JacksonJsonMessageConverter

All Implemented Interfaces:

MessageConverter, SmartMessageConverter

public class JacksonJsonMessageConverter
extends AbstractMessageConverter

A Jackson 3.x based MessageConverter implementation.

The default constructor loads JacksonModules found by MapperBuilder.findModules(ClassLoader).

Since:

7.0

Author:

Sebastien Deleuze

Field Summary

Fields inherited from class org.springframework.messaging.converter.AbstractMessageConverter

logger

Constructor Summary

Constructors

Constructor	Description
JacksonJsonMessageConverter()	Construct a new instance with a JsonMapper customized with the JacksonModules found by MapperBuilder.findModules(ClassLoader).
JacksonJsonMessageConverter(MimeType... supportedMimeTypes)	Construct a new instance with a JsonMapper customized with the JacksonModules found by MapperBuilder.findModules(ClassLoader) and the provided MimeTypes.
JacksonJsonMessageConverter(ObjectMapper objectMapper)	Construct a new instance with the provided ObjectMapper.
JacksonJsonMessageConverter(ObjectMapper objectMapper, MimeType... supportedMimeTypes)	Construct a new instance with the provided ObjectMapper and the provided MimeTypes.

Method Summary

Modifier and Type	Method	Description
protected boolean	canConvertFrom(Message<?> message, @Nullable Class<?> targetClass)
protected boolean	canConvertTo(Object payload, @Nullable MessageHeaders headers)
protected @Nullable Object	convertFromInternal(Message<?> message, Class<?> targetClass, @Nullable Object conversionHint)	Convert the message payload from serialized form to an Object.
protected @Nullable Object	convertToInternal(Object payload, @Nullable MessageHeaders headers, @Nullable Object conversionHint)	Convert the payload object to serialized form.
protected tools.jackson.core.JsonEncoding	getJsonEncoding(@Nullable MimeType contentType)	Determine the JSON encoding to use for the given content type.
protected @Nullable Class<?>	getSerializationView(@Nullable Object conversionHint)	Determine a Jackson serialization view based on the given conversion hint.
protected boolean	supports(Class<?> clazz)	Whether the given class is supported by this converter.

Methods inherited from class org.springframework.messaging.converter.AbstractMessageConverter

addSupportedMimeTypes, fromMessage, fromMessage, getContentTypeResolver, getDefaultContentType, getMimeType, getSerializedPayloadClass, getSupportedMimeTypes, isStrictContentTypeMatch, setContentTypeResolver, setSerializedPayloadClass, setStrictContentTypeMatch, supportsMimeType, toMessage, toMessage

Methods inherited from class java.lang.Object

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

Constructor Details

JacksonJsonMessageConverter

public JacksonJsonMessageConverter()

Construct a new instance with a JsonMapper customized with the JacksonModules found by MapperBuilder.findModules(ClassLoader).

JacksonJsonMessageConverter

public JacksonJsonMessageConverter(MimeType... supportedMimeTypes)

Construct a new instance with a JsonMapper customized with the JacksonModules found by MapperBuilder.findModules(ClassLoader) and the provided MimeTypes.

Parameters:

supportedMimeTypes - the supported MIME types

JacksonJsonMessageConverter

public JacksonJsonMessageConverter(ObjectMapper objectMapper)

Construct a new instance with the provided ObjectMapper.

See Also:

• JsonMapper.builder()
• MapperBuilder.findModules(ClassLoader)

JacksonJsonMessageConverter

public JacksonJsonMessageConverter(ObjectMapper objectMapper,
 MimeType... supportedMimeTypes)

Construct a new instance with the provided ObjectMapper and the provided MimeTypes.

See Also:

• JsonMapper.builder()
• MapperBuilder.findModules(ClassLoader)

Method Details

canConvertFrom

protected boolean canConvertFrom(Message<?> message,
 @Nullable Class<?> targetClass)

Overrides:

canConvertFrom in class AbstractMessageConverter

canConvertTo

protected boolean canConvertTo(Object payload,
 @Nullable MessageHeaders headers)

Overrides:

canConvertTo in class AbstractMessageConverter

supports

protected boolean supports(Class<?> clazz)

Description copied from class: AbstractMessageConverter

Whether the given class is supported by this converter.

Specified by:

supports in class AbstractMessageConverter

Parameters:

clazz - the class to test for support

Returns:

true if supported; false otherwise

convertFromInternal

protected @Nullable Object convertFromInternal(Message<?> message,
 Class<?> targetClass,
 @Nullable Object conversionHint)

Description copied from class: AbstractMessageConverter

Convert the message payload from serialized form to an Object.

Overrides:

convertFromInternal in class AbstractMessageConverter

Parameters:

message - the input message

targetClass - the target class for the conversion

conversionHint - an extra object passed to the MessageConverter, for example, the associated MethodParameter (may be null)

Returns:

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

convertToInternal

protected @Nullable Object convertToInternal(Object payload,
 @Nullable MessageHeaders headers,
 @Nullable Object conversionHint)

Description copied from class: AbstractMessageConverter

Convert the payload object to serialized form.

Overrides:

convertToInternal in class AbstractMessageConverter

Parameters:

payload - the Object to convert

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

conversionHint - an extra object passed to the MessageConverter, for example, the associated MethodParameter (may be null)

Returns:

the resulting payload for the message, or null if the converter cannot perform the conversion

getSerializationView

protected @Nullable Class<?> getSerializationView(@Nullable Object conversionHint)

Determine a Jackson serialization view based on the given conversion hint.

Parameters:

conversionHint - the conversion hint Object as passed into the converter for the current conversion attempt

Returns:

the serialization view class, or null if none

getJsonEncoding

protected tools.jackson.core.JsonEncoding getJsonEncoding(@Nullable MimeType contentType)

Determine the JSON encoding to use for the given content type.

Parameters:

contentType - the MIME type from the MessageHeaders, if any

Returns:

the JSON encoding to use (never null)