Jackson2ObjectMapperFactoryBean (Spring Framework 4.0.2.RELEASE API)

java.lang.Object
- org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean

All Implemented Interfaces:: Aware, BeanClassLoaderAware, FactoryBean<ObjectMapper>, InitializingBean

public class Jackson2ObjectMapperFactoryBean
extends Object
implements FactoryBean<ObjectMapper>, BeanClassLoaderAware, InitializingBean

A FactoryBean for creating a Jackson 2.x ObjectMapper with setters to enable or disable Jackson features from within XML configuration.

Example usage with MappingJackson2HttpMessageConverter:

 <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
   <property name="objectMapper">
     <bean class="org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean"
       p:autoDetectFields="false"
       p:autoDetectGettersSetters="false"
       p:annotationIntrospector-ref="jaxbAnnotationIntrospector" />
   </property>
 </bean>

Example usage with MappingJackson2JsonView:

 <bean class="org.springframework.web.servlet.view.json.MappingJackson2JsonView">
   <property name="objectMapper">
     <bean class="org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean"
       p:failOnEmptyBeans="false"
       p:indentOutput="true">
       <property name="serializers">
         <array>
           <bean class="org.mycompany.MyCustomSerializer" />
         </array>
       </property>
     </bean>
   </property>
 </bean>

In case there are no specific setters provided (for some rarely used options), you can still use the more general methods setFeaturesToEnable(java.lang.Object...) and setFeaturesToDisable(java.lang.Object...).

 <bean class="org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean">
   <property name="featuresToEnable">
     <array>
       <util:constant static-field="com.fasterxml.jackson.databind.SerializationFeature$WRAP_ROOT_VALUE"/>
       <util:constant static-field="com.fasterxml.jackson.databind.SerializationFeature$CLOSE_CLOSEABLE"/>
     </array>
   </property>
   <property name="featuresToDisable">
     <array>
       <util:constant static-field="com.fasterxml.jackson.databind.MapperFeature$USE_ANNOTATIONS"/>
     </array>
   </property>
 </bean>

In case you want to configure Jackson's ObjectMapper with a custom Module, you can register one or more such Modules by class name via setModulesToInstall(java.lang.Class<? extends com.fasterxml.jackson.databind.Module>...):

 <bean class="org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean">
   <property name="modulesToInstall" value="myapp.jackson.MySampleModule,myapp.jackson.MyOtherModule"/>
 </bean

Note that Jackson's JSR-310 and Joda-Time support modules will be registered automatically when available (and when Java 8 and Joda-Time themselves are available, respectively).

Tested against Jackson 2.2 and 2.3; compatible with Jackson 2.0 and higher.

Since:: 3.2
Author:: Dmitry Katsubo, Rossen Stoyanchev, Brian Clozel, Juergen Hoeller

Constructor Summary

Constructors
Constructor and Description

Jackson2ObjectMapperFactoryBean()

Constructors
Constructor and Description
`Jackson2ObjectMapperFactoryBean()`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`afterPropertiesSet()` Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).
`ObjectMapper`	`getObject()` Return the singleton ObjectMapper.
`Class<?>`	`getObjectType()` Return the type of object that this FactoryBean creates, or `null` if not known in advance.
`boolean`	`isSingleton()` Is the object managed by this factory a singleton? That is, will `FactoryBean.getObject()` always return the same object (a reference that can be cached)?
`void`	`setAnnotationIntrospector(AnnotationIntrospector annotationIntrospector)` Set an `AnnotationIntrospector` for both serialization and deserialization.
`void`	`setAutoDetectFields(boolean autoDetectFields)` Shortcut for `MapperFeature.AUTO_DETECT_FIELDS` option.
`void`	`setAutoDetectGettersSetters(boolean autoDetectGettersSetters)` Shortcut for `MapperFeature.AUTO_DETECT_SETTERS`/ `MapperFeature.AUTO_DETECT_GETTERS` option.
`void`	`setBeanClassLoader(ClassLoader beanClassLoader)` Callback that supplies the bean `class loader` to a bean instance.
`void`	`setDateFormat(DateFormat dateFormat)` Define the format for date/time with the given `DateFormat`.
`void`	`setDeserializersByType(Map<Class<?>,JsonDeserializer<?>> deserializers)` Configure custom deserializers for the given types.
`void`	`setFailOnEmptyBeans(boolean failOnEmptyBeans)` Shortcut for `SerializationFeature.FAIL_ON_EMPTY_BEANS` option.
`void`	`setFeaturesToDisable(Object... featuresToDisable)` Specify features to disable.
`void`	`setFeaturesToEnable(Object... featuresToEnable)` Specify features to enable.
`void`	`setFindModulesViaServiceLoader(boolean findModules)` Set whether to let Jackson find available modules via the JDK ServiceLoader, based on META-INF metadata in the classpath.
`void`	`setIndentOutput(boolean indentOutput)` Shortcut for `SerializationFeature.INDENT_OUTPUT` option.
`void`	`setModules(List<Module> modules)` Set a complete list of modules to be registered with the `ObjectMapper`.
`void`	`setModulesToInstall(Class<? extends Module>... modules)` Specify one or more modules by class (or class name in XML), to be registered with the `ObjectMapper`.
`void`	`setObjectMapper(ObjectMapper objectMapper)` Set the ObjectMapper instance to use.
`void`	`setPropertyNamingStrategy(PropertyNamingStrategy propertyNamingStrategy)` Specify a `PropertyNamingStrategy` to configure the `ObjectMapper` with.
`void`	`setSerializationInclusion(com.fasterxml.jackson.annotation.JsonInclude.Include serializationInclusion)` Set a custom inclusion strategy for serialization.
`void`	`setSerializers(JsonSerializer<?>... serializers)` Configure custom serializers.
`void`	`setSerializersByType(Map<Class<?>,JsonSerializer<?>> serializers)` Configure custom serializers for the given types.
`void`	`setSimpleDateFormat(String format)` Define the date/time format with a `SimpleDateFormat`.

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

- Constructor Detail
  - Jackson2ObjectMapperFactoryBean
```
public Jackson2ObjectMapperFactoryBean()
```
- Method Detail
  - setObjectMapper
```
public void setObjectMapper(ObjectMapper objectMapper)
```
    Set the ObjectMapper instance to use. If not set, the ObjectMapper will be created using its default constructor.
  - setDateFormat
```
public void setDateFormat(DateFormat dateFormat)
```
    Define the format for date/time with the given DateFormat.
    Note: Setting this property makes the exposed ObjectMapper non-thread-safe, according to Jackson's thread safety rules.
    
    See Also:
    
    setSimpleDateFormat(String)
  - setSimpleDateFormat
```
public void setSimpleDateFormat(String format)
```
    Define the date/time format with a SimpleDateFormat.
    Note: Setting this property makes the exposed ObjectMapper non-thread-safe, according to Jackson's thread safety rules.
    
    See Also:
    
    setDateFormat(DateFormat)
  - setAnnotationIntrospector
```
public void setAnnotationIntrospector(AnnotationIntrospector annotationIntrospector)
```
    Set an AnnotationIntrospector for both serialization and deserialization.
  - setSerializationInclusion
```
public void setSerializationInclusion(com.fasterxml.jackson.annotation.JsonInclude.Include serializationInclusion)
```
    Set a custom inclusion strategy for serialization.
    
    See Also:
    
    JsonInclude.Include
  - setSerializers
```
public void setSerializers(JsonSerializer<?>... serializers)
```
    Configure custom serializers. Each serializer is registered for the type returned by JsonSerializer.handledType(), which must not be null.
    
    See Also:
    
    setSerializersByType(Map)
  - setSerializersByType
```
public void setSerializersByType(Map<Class<?>,JsonSerializer<?>> serializers)
```
    Configure custom serializers for the given types.
    
    See Also:
    
    setSerializers(JsonSerializer...)
  - setDeserializersByType
```
public void setDeserializersByType(Map<Class<?>,JsonDeserializer<?>> deserializers)
```
    Configure custom deserializers for the given types.
  - setAutoDetectFields
```
public void setAutoDetectFields(boolean autoDetectFields)
```
    Shortcut for MapperFeature.AUTO_DETECT_FIELDS option.
  - setAutoDetectGettersSetters
```
public void setAutoDetectGettersSetters(boolean autoDetectGettersSetters)
```
    Shortcut for MapperFeature.AUTO_DETECT_SETTERS/ MapperFeature.AUTO_DETECT_GETTERS option.
  - setFailOnEmptyBeans
```
public void setFailOnEmptyBeans(boolean failOnEmptyBeans)
```
    Shortcut for SerializationFeature.FAIL_ON_EMPTY_BEANS option.
  - setIndentOutput
```
public void setIndentOutput(boolean indentOutput)
```
    Shortcut for SerializationFeature.INDENT_OUTPUT option.
  - setFeaturesToEnable
```
public void setFeaturesToEnable(Object... featuresToEnable)
```
    Specify features to enable.
    
    See Also:
    
    JsonParser.Feature, JsonGenerator.Feature, SerializationFeature, DeserializationFeature, MapperFeature
  - setFeaturesToDisable
```
public void setFeaturesToDisable(Object... featuresToDisable)
```
    Specify features to disable.
    
    See Also:
    
    JsonParser.Feature, JsonGenerator.Feature, SerializationFeature, DeserializationFeature, MapperFeature
  - setModules
```
public void setModules(List<Module> modules)
```
    Set a complete list of modules to be registered with the ObjectMapper.
    Note: If this is set, no finding of modules is going to happen - not by Jackson, and not by Spring either (see setFindModulesViaServiceLoader(boolean)). As a consequence, specifying an empty list here will suppress any kind of module detection.
    Specify either this or setModulesToInstall(java.lang.Class<? extends com.fasterxml.jackson.databind.Module>...), not both.
    
    Since:
    
    4.0
    
    See Also:
    
    Module
  - setModulesToInstall
```
public void setModulesToInstall(Class<? extends Module>... modules)
```
    Specify one or more modules by class (or class name in XML), to be registered with the ObjectMapper.
    Modules specified here will be registered in combination with Spring's autodetection of JSR-310 and Joda-Time, or Jackson's finding of modules (see setFindModulesViaServiceLoader(boolean)).
    Specify either this or setModules(java.util.List<com.fasterxml.jackson.databind.Module>), not both.
    
    Since:
    
    4.0.1
    
    See Also:
    
    Module
  - setFindModulesViaServiceLoader
```
public void setFindModulesViaServiceLoader(boolean findModules)
```
    Set whether to let Jackson find available modules via the JDK ServiceLoader, based on META-INF metadata in the classpath. Requires Jackson 2.2 or higher.
    If this mode is not set, Spring's Jackson2ObjectMapperFactoryBean itself will try to find the JSR-310 and Joda-Time support modules on the classpath - provided that Java 8 and Joda-Time themselves are available, respectively.
    
    Since:
    
    4.0.1
    
    See Also:
    
    com.fasterxml.jackson.databind.ObjectMapper#findModules()
  - setPropertyNamingStrategy
```
public void setPropertyNamingStrategy(PropertyNamingStrategy propertyNamingStrategy)
```
    Specify a PropertyNamingStrategy to configure the ObjectMapper with.
  - setBeanClassLoader
```
public void setBeanClassLoader(ClassLoader beanClassLoader)
```
    Description copied from interface: BeanClassLoaderAware
    
    Callback that supplies the bean class loader to a bean instance.
    Invoked after the population of normal bean properties but before an initialization callback such as InitializingBean's InitializingBean.afterPropertiesSet() method or a custom init-method.
    
    Specified by:
    
    setBeanClassLoader in interface BeanClassLoaderAware
    
    Parameters:
    
    beanClassLoader - the owning class loader; may be null in which case a default ClassLoader must be used, for example the ClassLoader obtained via ClassUtils.getDefaultClassLoader()
  - afterPropertiesSet
```
public void afterPropertiesSet()
```
    Description copied from interface: InitializingBean
    
    Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).
    This method allows the bean instance to perform initialization only possible when all bean properties have been set and to throw an exception in the event of misconfiguration.
    
    Specified by:
    
    afterPropertiesSet in interface InitializingBean
  - getObject
```
public ObjectMapper getObject()
```
    Return the singleton ObjectMapper.
    
    Specified by:
    
    getObject in interface FactoryBean<ObjectMapper>
    
    Returns:
    
    an instance of the bean (can be null)
    
    See Also:
    
    FactoryBeanNotInitializedException
  - getObjectType
```
public Class<?> getObjectType()
```
    Description copied from interface: FactoryBean
    
    Return the type of object that this FactoryBean creates, or null if not known in advance.
    This allows one to check for specific types of beans without instantiating objects, for example on autowiring.
    In the case of implementations that are creating a singleton object, this method should try to avoid singleton creation as far as possible; it should rather estimate the type in advance. For prototypes, returning a meaningful type here is advisable too.
    This method can be called before this FactoryBean has been fully initialized. It must not rely on state created during initialization; of course, it can still use such state if available.
    NOTE: Autowiring will simply ignore FactoryBeans that return null here. Therefore it is highly recommended to implement this method properly, using the current state of the FactoryBean.
    
    Specified by:
    
    getObjectType in interface FactoryBean<ObjectMapper>
    
    Returns:
    
    the type of object that this FactoryBean creates, or null if not known at the time of the call
    
    See Also:
    
    ListableBeanFactory.getBeansOfType(java.lang.Class<T>)
  - isSingleton
```
public boolean isSingleton()
```
    Description copied from interface: FactoryBean
    
    Is the object managed by this factory a singleton? That is, will FactoryBean.getObject() always return the same object (a reference that can be cached)?
    NOTE: If a FactoryBean indicates to hold a singleton object, the object returned from getObject() might get cached by the owning BeanFactory. Hence, do not return true unless the FactoryBean always exposes the same reference.
    The singleton status of the FactoryBean itself will generally be provided by the owning BeanFactory; usually, it has to be defined as singleton there.
    NOTE: This method returning false does not necessarily indicate that returned objects are independent instances. An implementation of the extended SmartFactoryBean interface may explicitly indicate independent instances through its SmartFactoryBean.isPrototype() method. Plain FactoryBean implementations which do not implement this extended interface are simply assumed to always return independent instances if the isSingleton() implementation returns false.
    
    Specified by:
    
    isSingleton in interface FactoryBean<ObjectMapper>
    
    Returns:
    
    whether the exposed object is a singleton
    
    See Also:
    
    FactoryBean.getObject(), SmartFactoryBean.isPrototype()

Class Jackson2ObjectMapperFactoryBean

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Jackson2ObjectMapperFactoryBean

Method Detail

setObjectMapper

setDateFormat

setSimpleDateFormat

setAnnotationIntrospector

setSerializationInclusion

setSerializers

setSerializersByType

setDeserializersByType

setAutoDetectFields

setAutoDetectGettersSetters

setFailOnEmptyBeans

setIndentOutput

setFeaturesToEnable

setFeaturesToDisable

setModules

setModulesToInstall

setFindModulesViaServiceLoader

setPropertyNamingStrategy

setBeanClassLoader

afterPropertiesSet

getObject

getObjectType

isSingleton