com.fasterxml.jackson.jaxrs.json

Class JacksonJsonProvider

java.lang.Object

com.fasterxml.jackson.jaxrs.base.ProviderBase<JacksonJsonProvider,com.fasterxml.jackson.databind.ObjectMapper,JsonEndpointConfig,JsonMapperConfigurator>

com.fasterxml.jackson.jaxrs.json.JacksonJsonProvider

All Implemented Interfaces:

com.fasterxml.jackson.core.Versioned, javax.ws.rs.ext.MessageBodyReader<Object>, javax.ws.rs.ext.MessageBodyWriter<Object>

Direct Known Subclasses:

JacksonJaxbJsonProvider

@Provider
@Consumes(value="*/*")
@Produces(value="*/*")
public class JacksonJsonProvider
extends ProviderBase<JacksonJsonProvider,com.fasterxml.jackson.databind.ObjectMapper,JsonEndpointConfig,JsonMapperConfigurator>

Basic implementation of JAX-RS abstractions (MessageBodyReader, MessageBodyWriter) needed for binding JSON ("application/json") content to and from Java Objects ("POJO"s).

Actual data binding functionality is implemented by ObjectMapper: mapper to use can be configured in multiple ways:

• By explicitly passing mapper to use in constructor
• By explictly setting mapper to use by ProviderBase.setMapper(MAPPER)
• By defining JAX-RS Provider that returns ObjectMappers.
• By doing none of above, in which case a default mapper instance is constructed (and configured if configuration methods are called)

The last method ("do nothing specific") is often good enough; explicit passing of Mapper is simple and explicit; and Provider-based method may make sense with Depedency Injection frameworks, or if Mapper has to be configured differently for different media types.

Note that the default mapper instance will be automatically created if one of explicit configuration methods (like ProviderBase.configure(com.fasterxml.jackson.jaxrs.cfg.JaxRSFeature, boolean)) is called: if so, Provider-based introspection is NOT used, but the resulting Mapper is used as configured.

Note: version 1.3 added a sub-class (JacksonJaxbJsonProvider) which is configured by default to use both Jackson and JAXB annotations for configuration (base class when used as-is defaults to using just Jackson annotations)

Author:

Tatu Saloranta

Field Summary

Fields

Modifier and Type	Field and Description
protected String	_jsonpFunctionName JSONP function name to use for automatic JSONP wrapping, if any; if null, no JSONP wrapping is done.
protected javax.ws.rs.ext.Providers	_providers Injectable context object used to locate configured instance of ObjectMapper to use for actual serialization.
static Annotations[]	BASIC_ANNOTATIONS Default annotation sets to use, if not explicitly defined during construction: only Jackson annotations are used for the base class.
static String	MIME_JAVASCRIPT
static String	MIME_JAVASCRIPT_MS

Fields inherited from class com.fasterxml.jackson.jaxrs.base.ProviderBase

_cfgCheckCanDeserialize, _cfgCheckCanSerialize, _cfgCustomUntouchables, _defaultReadView, _defaultWriteView, _jaxRSFeatures, _mapperConfig, _noContentExceptionRef, _readers, _unreadableClasses, _untouchables, _unwritableClasses, _writers, DEFAULT_UNREADABLES, DEFAULT_UNTOUCHABLES, DEFAULT_UNWRITABLES, HEADER_CONTENT_TYPE_OPTIONS, JAXRS_FEATURE_DEFAULTS

Constructor Summary

Constructors

Constructor and Description
JacksonJsonProvider() Default constructor, usually used when provider is automatically configured to be used with JAX-RS implementation.
JacksonJsonProvider(Annotations... annotationsToUse)
JacksonJsonProvider(com.fasterxml.jackson.databind.ObjectMapper mapper)
JacksonJsonProvider(com.fasterxml.jackson.databind.ObjectMapper mapper, Annotations[] annotationsToUse) Constructor to use when a custom mapper (usually components like serializer/deserializer factories that have been configured) is to be used.

Method Summary

Methods

Modifier and Type	Method and Description
protected JsonEndpointConfig	_configForReading(com.fasterxml.jackson.databind.ObjectReader reader, Annotation[] annotations)
protected JsonEndpointConfig	_configForWriting(com.fasterxml.jackson.databind.ObjectWriter writer, Annotation[] annotations)
protected com.fasterxml.jackson.databind.ObjectMapper	_locateMapperViaProvider(Class<?> type, javax.ws.rs.core.MediaType mediaType) Helper method that is called if no mapper has been explicitly configured.
protected boolean	hasMatchingMediaType(javax.ws.rs.core.MediaType mediaType) Helper method used to check whether given media type is supported by this provider.
protected boolean	isJsonType(javax.ws.rs.core.MediaType mediaType) Deprecated. Since 2.2 use hasMatchingMediaType(MediaType) instead
void	setJSONPFunctionName(String fname)
com.fasterxml.jackson.core.Version	version() Method that will return version information stored in and read from jar that contains this class.

Methods inherited from class com.fasterxml.jackson.jaxrs.base.ProviderBase

_addSuperTypes, _configForReading, _configForWriting, _containedIn, _createGenerator, _createNoContentException, _createParser, _endpointForReading, _endpointForWriting, _findCustomUntouchable, _isIgnorableForReading, _isIgnorableForWriting, _isSpecialReadable, _modifyHeaders, addUntouchable, checkCanDeserialize, checkCanSerialize, configure, configure, configure, configure, configure, disable, disable, disable, disable, disable, disable, enable, enable, enable, enable, enable, enable, findEncoding, findSuperTypes, findSuperTypes, getSize, hasMatchingMediaTypeForReading, hasMatchingMediaTypeForWriting, isEnabled, isReadable, isWriteable, locateMapper, readFrom, removeUntouchable, setAnnotationsToUse, setDefaultReadView, setDefaultView, setDefaultWriteView, setMapper, writeTo

Methods inherited from class java.lang.Object

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

Field Detail

MIME_JAVASCRIPT

public static final String MIME_JAVASCRIPT

See Also:

Constant Field Values

MIME_JAVASCRIPT_MS

public static final String MIME_JAVASCRIPT_MS

See Also:

Constant Field Values

BASIC_ANNOTATIONS

public static final Annotations[] BASIC_ANNOTATIONS

Default annotation sets to use, if not explicitly defined during construction: only Jackson annotations are used for the base class. Sub-classes can use other settings.

_jsonpFunctionName

protected String _jsonpFunctionName

JSONP function name to use for automatic JSONP wrapping, if any; if null, no JSONP wrapping is done. Note that this is the default value that can be overridden on per-endpoint basis.

_providers

@Context
protected javax.ws.rs.ext.Providers _providers

Injectable context object used to locate configured instance of ObjectMapper to use for actual serialization.

Constructor Detail

JacksonJsonProvider

public JacksonJsonProvider()

Default constructor, usually used when provider is automatically configured to be used with JAX-RS implementation.

JacksonJsonProvider

public JacksonJsonProvider(Annotations... annotationsToUse)

Parameters:

annotationsToUse - Annotation set(s) to use for configuring data binding

JacksonJsonProvider

public JacksonJsonProvider(com.fasterxml.jackson.databind.ObjectMapper mapper)

JacksonJsonProvider

public JacksonJsonProvider(com.fasterxml.jackson.databind.ObjectMapper mapper,
                   Annotations[] annotationsToUse)

Constructor to use when a custom mapper (usually components like serializer/deserializer factories that have been configured) is to be used.

Parameters:

annotationsToUse - Sets of annotations (Jackson, JAXB) that provider should support

Method Detail

version

public com.fasterxml.jackson.core.Version version()

Method that will return version information stored in and read from jar that contains this class.

setJSONPFunctionName

public void setJSONPFunctionName(String fname)

hasMatchingMediaType

protected boolean hasMatchingMediaType(javax.ws.rs.core.MediaType mediaType)

Helper method used to check whether given media type is supported by this provider. Current implementation essentially checks to see whether MediaType.getSubtype() returns "json" or something ending with "+json". Or "text/x-json" (since 2.3)

Specified by:

hasMatchingMediaType in class ProviderBase<JacksonJsonProvider,com.fasterxml.jackson.databind.ObjectMapper,JsonEndpointConfig,JsonMapperConfigurator>

Since:

2.2

_locateMapperViaProvider

protected com.fasterxml.jackson.databind.ObjectMapper _locateMapperViaProvider(Class<?> type,
                                                                   javax.ws.rs.core.MediaType mediaType)

Description copied from class: ProviderBase

Helper method that is called if no mapper has been explicitly configured.

Specified by:

_locateMapperViaProvider in class ProviderBase<JacksonJsonProvider,com.fasterxml.jackson.databind.ObjectMapper,JsonEndpointConfig,JsonMapperConfigurator>

_configForReading

protected JsonEndpointConfig _configForReading(com.fasterxml.jackson.databind.ObjectReader reader,
                                   Annotation[] annotations)

Specified by:

_configForReading in class ProviderBase<JacksonJsonProvider,com.fasterxml.jackson.databind.ObjectMapper,JsonEndpointConfig,JsonMapperConfigurator>

_configForWriting

protected JsonEndpointConfig _configForWriting(com.fasterxml.jackson.databind.ObjectWriter writer,
                                   Annotation[] annotations)

Specified by:

_configForWriting in class ProviderBase<JacksonJsonProvider,com.fasterxml.jackson.databind.ObjectMapper,JsonEndpointConfig,JsonMapperConfigurator>

isJsonType

@Deprecated
protected boolean isJsonType(javax.ws.rs.core.MediaType mediaType)

Deprecated. Since 2.2 use hasMatchingMediaType(MediaType) instead