org.springframework.oxm.jaxb

Class Jaxb2Marshaller

java.lang.Object

org.springframework.oxm.jaxb.Jaxb2Marshaller

All Implemented Interfaces:

Aware, BeanClassLoaderAware, InitializingBean, GenericMarshaller, GenericUnmarshaller, Marshaller, MimeMarshaller, MimeUnmarshaller, Unmarshaller

public class Jaxb2Marshaller
extends Object
implements MimeMarshaller, MimeUnmarshaller, GenericMarshaller, GenericUnmarshaller, BeanClassLoaderAware, InitializingBean

Implementation of the GenericMarshaller interface for JAXB 2.1/2.2, as included in JDK 6 update 4+ and Java 7/8.

The typical usage will be to set either the "contextPath" or the "classesToBeBound" property on this bean, possibly customize the marshaller and unmarshaller by setting properties, schemas, adapters, and listeners, and to refer to it.

Since:

3.0

Author:

Arjen Poutsma, Juergen Hoeller, Rossen Stoyanchev

See Also:

setContextPath(String), setClassesToBeBound(Class[]), setJaxbContextProperties(Map), setMarshallerProperties(Map), setUnmarshallerProperties(Map), setSchema(Resource), setSchemas(Resource[]), setMarshallerListener(javax.xml.bind.Marshaller.Listener), setUnmarshallerListener(javax.xml.bind.Unmarshaller.Listener), setAdapters(XmlAdapter[])

Field Summary

Fields

Modifier and Type	Field and Description
protected Log	logger Logger available to subclasses

Constructor Summary

Constructors

Constructor and Description
Jaxb2Marshaller()

Method Summary

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).
protected XmlMappingException	convertJaxbException(JAXBException ex) Convert the given JAXBException to an appropriate exception from the org.springframework.oxm hierarchy.
protected Marshaller	createMarshaller() Return a newly created JAXB marshaller.
protected Unmarshaller	createUnmarshaller() Return a newly created JAXB unmarshaller.
Class<?>[]	getClassesToBeBound() Return the list of Java classes to be recognized by a newly created JAXBContext.
String	getContextPath() Return the JAXB context path.
JAXBContext	getJaxbContext() Return the JAXBContext used by this marshaller, lazily building it if necessary.
String[]	getPackagesToScan() Return the packages to search for JAXB2 annotations.
protected void	initJaxbMarshaller(Marshaller marshaller) Template method that can be overridden by concrete JAXB marshallers for custom initialization behavior.
protected void	initJaxbUnmarshaller(Unmarshaller unmarshaller) Template method that can be overridden by concrete JAXB marshallers for custom initialization behavior.
boolean	isProcessExternalEntities() Returns the configured value for whether XML external entities are allowed.
void	marshal(Object graph, Result result) Marshals the object graph with the given root into the provided Result.
void	marshal(Object graph, Result result, MimeContainer mimeContainer) Marshals the object graph with the given root into the provided Result, writing binary data to a MimeContainer.
void	setAdapters(XmlAdapter<?,?>... adapters) Specify the XmlAdapters to be registered with the JAXB Marshaller and Unmarshaller
void	setBeanClassLoader(ClassLoader classLoader) Callback that supplies the bean class loader to a bean instance.
void	setCheckForXmlRootElement(boolean checkForXmlRootElement) Specify whether the supports(Class) should check for @XmlRootElement annotations.
void	setClassesToBeBound(Class<?>... classesToBeBound) Set the list of Java classes to be recognized by a newly created JAXBContext.
void	setContextPath(String contextPath) Set a JAXB context path.
void	setContextPaths(String... contextPaths) Set multiple JAXB context paths.
void	setJaxbContextProperties(Map<String,?> jaxbContextProperties) Set the JAXBContext properties.
void	setLazyInit(boolean lazyInit) Set whether to lazily initialize the JAXBContext for this marshaller.
void	setMappedClass(Class<?> mappedClass) Specify a JAXB mapped class for partial unmarshalling.
void	setMarshallerListener(Marshaller.Listener marshallerListener) Specify the Marshaller.Listener to be registered with the JAXB Marshaller.
void	setMarshallerProperties(Map<String,?> properties) Set the JAXB Marshaller properties.
void	setMtomEnabled(boolean mtomEnabled) Specify whether MTOM support should be enabled or not.
void	setPackagesToScan(String... packagesToScan) Set the packages to search for classes with JAXB2 annotations in the classpath.
void	setProcessExternalEntities(boolean processExternalEntities) Indicates whether external XML entities are processed when unmarshalling.
void	setSchema(Resource schemaResource) Set the schema resource to use for validation.
void	setSchemaLanguage(String schemaLanguage) Set the schema language.
void	setSchemaResourceResolver(LSResourceResolver schemaResourceResolver) Set the resource resolver, as used to load the schema resources.
void	setSchemas(Resource... schemaResources) Set the schema resources to use for validation.
void	setSupportJaxbElementClass(boolean supportJaxbElementClass) Specify whether the supports(Class) returns true for the JAXBElement class.
void	setUnmarshallerListener(Unmarshaller.Listener unmarshallerListener) Set the Unmarshaller.Listener to be registered with the JAXB Unmarshaller.
void	setUnmarshallerProperties(Map<String,?> properties) Set the JAXB Unmarshaller properties.
void	setValidationEventHandler(ValidationEventHandler validationEventHandler) Set the JAXB validation event handler.
boolean	supports(Class<?> clazz) Indicates whether this marshaller can marshal instances of the supplied type.
boolean	supports(Type genericType) Indicates whether this marshaller can marshal instances of the supplied generic type.
Object	unmarshal(Source source) Unmarshals the given Source into an object graph.
Object	unmarshal(Source source, MimeContainer mimeContainer) Unmarshals the given provided Source into an object graph, reading binary attachments from a MimeContainer.
protected Object	unmarshalStaxSource(Unmarshaller jaxbUnmarshaller, Source staxSource)

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

Logger available to subclasses

Constructor Detail

Jaxb2Marshaller

public Jaxb2Marshaller()

Method Detail

setContextPaths

public void setContextPaths(String... contextPaths)

Set multiple JAXB context paths. The given array of context paths gets converted to a colon-delimited string, as supported by JAXB.

setContextPath

public void setContextPath(String contextPath)

Set a JAXB context path.

Setting either this property, "classesToBeBound" or "packagesToScan" is required.

getContextPath

public String getContextPath()

Return the JAXB context path.

setClassesToBeBound

public void setClassesToBeBound(Class<?>... classesToBeBound)

Set the list of Java classes to be recognized by a newly created JAXBContext.

Setting either this property, "contextPath" or "packagesToScan" is required.

getClassesToBeBound

public Class<?>[] getClassesToBeBound()

Return the list of Java classes to be recognized by a newly created JAXBContext.

setPackagesToScan

public void setPackagesToScan(String... packagesToScan)

Set the packages to search for classes with JAXB2 annotations in the classpath. This is using a Spring-bases search and therefore analogous to Spring's component-scan feature (ClassPathBeanDefinitionScanner).

Setting either this property, "contextPath" or "classesToBeBound" is required.

getPackagesToScan

public String[] getPackagesToScan()

Return the packages to search for JAXB2 annotations.

setJaxbContextProperties

public void setJaxbContextProperties(Map<String,?> jaxbContextProperties)

Set the JAXBContext properties. These implementation-specific properties will be set on the underlying JAXBContext.

setMarshallerProperties

public void setMarshallerProperties(Map<String,?> properties)

Set the JAXB Marshaller properties. These properties will be set on the underlying JAXB Marshaller, and allow for features such as indentation.

Parameters:

properties - the properties

See Also:

Marshaller.setProperty(String, Object), Marshaller.JAXB_ENCODING, Marshaller.JAXB_FORMATTED_OUTPUT, Marshaller.JAXB_NO_NAMESPACE_SCHEMA_LOCATION, Marshaller.JAXB_SCHEMA_LOCATION

setUnmarshallerProperties

public void setUnmarshallerProperties(Map<String,?> properties)

Set the JAXB Unmarshaller properties. These properties will be set on the underlying JAXB Unmarshaller.

Parameters:

properties - the properties

See Also:

Unmarshaller.setProperty(String, Object)

setMarshallerListener

public void setMarshallerListener(Marshaller.Listener marshallerListener)

Specify the Marshaller.Listener to be registered with the JAXB Marshaller.

setUnmarshallerListener

public void setUnmarshallerListener(Unmarshaller.Listener unmarshallerListener)

Set the Unmarshaller.Listener to be registered with the JAXB Unmarshaller.

setValidationEventHandler

public void setValidationEventHandler(ValidationEventHandler validationEventHandler)

Set the JAXB validation event handler. This event handler will be called by JAXB if any validation errors are encountered during calls to any of the marshal APIs.

setAdapters

public void setAdapters(XmlAdapter<?,?>... adapters)

Specify the XmlAdapters to be registered with the JAXB Marshaller and Unmarshaller

setSchema

public void setSchema(Resource schemaResource)

Set the schema resource to use for validation.

setSchemas

public void setSchemas(Resource... schemaResources)

Set the schema resources to use for validation.

setSchemaLanguage

public void setSchemaLanguage(String schemaLanguage)

Set the schema language. Default is the W3C XML Schema: http://www.w3.org/2001/XMLSchema".

See Also:

XMLConstants.W3C_XML_SCHEMA_NS_URI, XMLConstants.RELAXNG_NS_URI

setSchemaResourceResolver

public void setSchemaResourceResolver(LSResourceResolver schemaResourceResolver)

Set the resource resolver, as used to load the schema resources.

See Also:

SchemaFactory.setResourceResolver(org.w3c.dom.ls.LSResourceResolver), setSchema(Resource), setSchemas(Resource[])

setLazyInit

public void setLazyInit(boolean lazyInit)

Set whether to lazily initialize the JAXBContext for this marshaller. Default is false to initialize on startup; can be switched to true.

Early initialization just applies if afterPropertiesSet() is called.

setMtomEnabled

public void setMtomEnabled(boolean mtomEnabled)

Specify whether MTOM support should be enabled or not. Default is false: marshalling using XOP/MTOM not being enabled.

setSupportJaxbElementClass

public void setSupportJaxbElementClass(boolean supportJaxbElementClass)

Specify whether the supports(Class) returns true for the JAXBElement class.

Default is false, meaning that supports(Class) always returns false for JAXBElement classes (though supports(Type) can return true, since it can obtain the type parameters of JAXBElement).

This property is typically enabled in combination with usage of classes like MarshallingView, since the ModelAndView does not offer type parameter information at runtime.

See Also:

supports(Class), supports(Type)

setCheckForXmlRootElement

public void setCheckForXmlRootElement(boolean checkForXmlRootElement)

Specify whether the supports(Class) should check for @XmlRootElement annotations.

Default is true, meaning that supports(Class) will check for this annotation. However, some JAXB implementations (i.e. EclipseLink MOXy) allow for defining the bindings in an external definition file, thus keeping the classes annotations free. Setting this property to false supports these JAXB implementations.

See Also:

supports(Class), supports(Type)

setMappedClass

public void setMappedClass(Class<?> mappedClass)

Specify a JAXB mapped class for partial unmarshalling.

See Also:

Unmarshaller.unmarshal(javax.xml.transform.Source, Class)

setProcessExternalEntities

public void setProcessExternalEntities(boolean processExternalEntities)

Indicates whether external XML entities are processed when unmarshalling.

Default is false, meaning that external entities are not resolved. Note that processing of external entities will only be enabled/disabled when the Source passed to unmarshal(Source) is a SAXSource or StreamSource. It has no effect for DOMSource or StAXSource instances.

isProcessExternalEntities

public boolean isProcessExternalEntities()

Returns the configured value for whether XML external entities are allowed.

setBeanClassLoader

public void setBeanClassLoader(ClassLoader classLoader)

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:

classLoader - 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()
                        throws Exception

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

Throws:

Exception - in the event of misconfiguration (such as failure to set an essential property) or if initialization fails.

getJaxbContext

public JAXBContext getJaxbContext()

Return the JAXBContext used by this marshaller, lazily building it if necessary.

supports

public boolean supports(Class<?> clazz)

Description copied from interface: Marshaller

Indicates whether this marshaller can marshal instances of the supplied type.

Specified by:

supports in interface Marshaller

Specified by:

supports in interface Unmarshaller

Parameters:

clazz - the class that this marshaller is being asked if it can marshal

Returns:

true if this marshaller can indeed marshal instances of the supplied class; false otherwise

supports

public boolean supports(Type genericType)

Description copied from interface: GenericMarshaller

Indicates whether this marshaller can marshal instances of the supplied generic type.

Specified by:

supports in interface GenericMarshaller

Specified by:

supports in interface GenericUnmarshaller

Parameters:

genericType - the type that this marshaller is being asked if it can marshal

Returns:

true if this marshaller can indeed marshal instances of the supplied type; false otherwise

marshal

public void marshal(Object graph,
                    Result result)
             throws XmlMappingException

Description copied from interface: Marshaller

Marshals the object graph with the given root into the provided Result.

Specified by:

marshal in interface Marshaller

Parameters:

graph - the root of the object graph to marshal

result - the result to marshal to

Throws:

XmlMappingException - if the given object cannot be marshalled to the result

marshal

public void marshal(Object graph,
                    Result result,
                    MimeContainer mimeContainer)
             throws XmlMappingException

Description copied from interface: MimeMarshaller

Marshals the object graph with the given root into the provided Result, writing binary data to a MimeContainer.

Specified by:

marshal in interface MimeMarshaller

Parameters:

graph - the root of the object graph to marshal

result - the result to marshal to

mimeContainer - the MIME container to write extracted binary content to

Throws:

XmlMappingException - if the given object cannot be marshalled to the result

createMarshaller

protected Marshaller createMarshaller()

Return a newly created JAXB marshaller. JAXB marshallers are not necessarily thread safe.

initJaxbMarshaller

protected void initJaxbMarshaller(Marshaller marshaller)
                           throws JAXBException

Template method that can be overridden by concrete JAXB marshallers for custom initialization behavior. Gets called after creation of JAXB Marshaller, and after the respective properties have been set.

The default implementation sets the defined properties, the validation event handler, the schemas, listener, and adapters.

Throws:

JAXBException

unmarshal

public Object unmarshal(Source source)
                 throws XmlMappingException

Description copied from interface: Unmarshaller

Unmarshals the given Source into an object graph.

Specified by:

unmarshal in interface Unmarshaller

Parameters:

source - the source to marshal from

Returns:

the object graph

Throws:

XmlMappingException - if the given source cannot be mapped to an object

unmarshal

public Object unmarshal(Source source,
                        MimeContainer mimeContainer)
                 throws XmlMappingException

Description copied from interface: MimeUnmarshaller

Unmarshals the given provided Source into an object graph, reading binary attachments from a MimeContainer.

Specified by:

unmarshal in interface MimeUnmarshaller

Parameters:

source - the source to marshal from

mimeContainer - the MIME container to read extracted binary content from

Returns:

the object graph

Throws:

XmlMappingException - if the given source cannot be mapped to an object

unmarshalStaxSource

protected Object unmarshalStaxSource(Unmarshaller jaxbUnmarshaller,
                                     Source staxSource)
                              throws JAXBException

Throws:

JAXBException

createUnmarshaller

protected Unmarshaller createUnmarshaller()

Return a newly created JAXB unmarshaller. Note: JAXB unmarshallers are not necessarily thread-safe.

initJaxbUnmarshaller

protected void initJaxbUnmarshaller(Unmarshaller unmarshaller)
                             throws JAXBException

Template method that can be overridden by concrete JAXB marshallers for custom initialization behavior. Gets called after creation of JAXB Marshaller, and after the respective properties have been set.

The default implementation sets the defined properties, the validation event handler, the schemas, listener, and adapters.

Throws:

JAXBException

convertJaxbException

protected XmlMappingException convertJaxbException(JAXBException ex)

Convert the given JAXBException to an appropriate exception from the org.springframework.oxm hierarchy.

Parameters:

ex - JAXBException that occured

Returns:

the corresponding XmlMappingException