org.eclipse.persistence.jaxb

Class JAXBContext

java.lang.Object

javax.xml.bind.JAXBContext

org.eclipse.persistence.jaxb.JAXBContext

Direct Known Subclasses:

DynamicJAXBContext

public class JAXBContext
extends JAXBContext

Purpose:Provide a EclipseLink implementation of the JAXBContext interface.

Responsibilities:

• Create Marshaller instances
• Create Unmarshaller instances
• Create Binder instances
• Create Introspector instances
• Create Validator instances
• Generate Schema Files

This is the EclipseLink JAXB 2.0 implementation of javax.xml.bind.JAXBContext. This class is created by the JAXBContextFactory and is used to create Marshallers, Unmarshallers, Validators, Binders and Introspectors. A JAXBContext can also be used to create Schema Files.

Bootstrapping: When bootstrapping the JAXBContext from a EclipseLink externalized metadata file(s) a number of input options are available. The externalized metadata file (one per package) is passed in through a property when creating the JAXBContext. The key used in the properties map is "eclipselink-oxm-xml". The externalized metadata file can be set in the properties map in one of three ways:

i) For a single externalized metadata file, one of the following can be set in the properties map:

• java.io.File
• java.io.InputStream
• java.io.Reader
• java.net.URL
• javax.xml.stream.XMLEventReader
• javax.xml.stream.XMLStreamReader
• javax.xml.transform.Source
• org.w3c.dom.Node
• org.xml.sax.InputSource

When using one of the above options, the package name must be set via package-name attribute on the xml-bindings element in the externalized metadata file.

ii) For multiple externalized metadata files where the package name is specified within each externalized metadata file, a List can be used. The entries in the List are to be one of the types listed in i) above.

iii) For multiple externalized metadata files where the package name is not specified in each externalized metadata file, a Map can be used. The key must be a String (package name) and each value in the Map (externalized metadata file) is to be one of the types listed in i) above.

Note that in each of the above cases the package name can be set via package-name attribute on the xml-bindings element in the externalized metadata file. If set, any java-type names in the given metadata file that do not contain the package name will have that package name prepended to it. Also note that a List or Map can be used for a single externalized metadata file.

See Also:

JAXBContext, JAXBMarshaller, JAXBUnmarshaller, JAXBBinder, JAXBIntrospector, JAXBContextProperties

Author:

mmacivor

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	JAXBContext.JAXBContextInput The JAXBContextInput is used to create a JAXBContextState which is responsible for accessing the underlying XMLContext
protected static class	JAXBContext.JAXBContextState

Field Summary

Fields

Modifier and Type	Field and Description
protected JAXBContext.JAXBContextInput	contextInput
protected JAXBContext.JAXBContextState	contextState
protected static ValidationEventHandler	DEFAULT_VALIDATION_EVENT_HANDLER For JAXB 2 there is no explicitly defined default validation handler and the default event handling only terminates the operation after encountering a fatal error.

Fields inherited from class javax.xml.bind.JAXBContext

JAXB_CONTEXT_FACTORY

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	JAXBContext()
protected	JAXBContext(JAXBContext.JAXBContextInput contextInput)
	JAXBContext(XMLContext context) Create a JAXBContext for a given XMLContext.
	JAXBContext(XMLContext context, Generator generator, java.lang.reflect.Type[] boundTypes) Create a JAXBContext.
	JAXBContext(XMLContext context, Generator generator, TypeMappingInfo[] boundTypes) Create a JAXBContext.

Method Summary

Modifier and Type	Method and Description
void	applyORMMetadata(org.eclipse.persistence.internal.sessions.AbstractSession ormSession) ADVANCED: Adjust the OXM metadata to take into account ORM mapping metadata
JAXBBinder	createBinder() Create a JAXBBinder.
<T> JAXBBinder	createBinder(java.lang.Class<T> nodeClass) Create a JAXBBinder.
java.lang.Object	createByQualifiedName(java.lang.String namespace, java.lang.String typeName, boolean isGlobalType) Create a new object instance for a given XML namespace and name.
<T> T	createByXPath(java.lang.Object parentObject, java.lang.String xPath, NamespaceResolver namespaceResolver, java.lang.Class<T> returnType) Create a new object instance for a given XPath, relative to the parentObject.
protected JAXBElement	createJAXBElement(javax.xml.namespace.QName qname, java.lang.Class theClass, java.lang.Object value)
protected JAXBElement	createJAXBElementFromXMLRoot(org.eclipse.persistence.internal.oxm.Root xmlRoot, java.lang.Class declaredType)
JAXBIntrospector	createJAXBIntrospector() Creates a JAXBIntrospector object.
JAXBMarshaller	createMarshaller() Create a JAXBMarshaller.
ObjectGraph	createObjectGraph(java.lang.Class type)
ObjectGraph	createObjectGraph(java.lang.String typeName)
JAXBUnmarshaller	createUnmarshaller() Create a JAXBUnmarshaller.
JAXBValidator	createValidator() Create a JAXBValidator.
void	generateJsonSchema(SchemaOutputResolver outputResolver, java.lang.Class rootClass)
void	generateSchema(SchemaOutputResolver outputResolver) Generate a Schema for this JAXBContext
void	generateSchema(SchemaOutputResolver outputResolver, java.util.Map<javax.xml.namespace.QName,java.lang.reflect.Type> additonalGlobalElements) Generate a Schema for this JAXBContext
java.util.Map<java.lang.String,java.lang.Class>	getArrayClassesToGeneratedClasses() INTERNAL: Get the map for which array class (by name) corresponds to which generated class
BeanValidationHelper	getBeanValidationHelper() Returns BeanValidationHelper.
java.util.Map<java.lang.String,java.lang.Class>	getClassToGeneratedClasses() INTERNAL: Get the map containing which Class (by name) corresponds to which generated class.
java.util.Map<java.lang.reflect.Type,java.lang.Class>	getCollectionClassesToGeneratedClasses() INTERNAL: Get the map for which collection class (by Type) corresponds to which generated class
java.util.Map<javax.xml.namespace.QName,java.lang.Class>	getQNamesToDeclaredClasses() INTERNAL: Get the map of which QName corresponds to which declared class.
java.util.Map<TypeMappingInfo,javax.xml.namespace.QName>	getTypeMappingInfoToSchemaType() INTERNAL: Get the map of which TypeMappingInfo corresponds to which QName.
java.util.Map<java.lang.reflect.Type,javax.xml.namespace.QName>	getTypeToSchemaType() INTERNAL: Get the map of which Type corresponds to which QName.
<T> T	getValueByXPath(java.lang.Object object, java.lang.String xPath, NamespaceResolver namespaceResolver, java.lang.Class<T> returnType) Get a value from an object based on an XPath statement.
XMLContext	getXMLContext() Return the XMLContext associated with this JAXBContext.
javax.xml.stream.XMLInputFactory	getXMLInputFactory()
boolean	hasSwaRef() Returns true if any Object in this context contains a property annotated with an XmlAttachmentRef annotation.
void	initTypeToSchemaType() INTERNAL: Populate the map of which Type corresponds to which QName.
void	refreshMetadata() ADVANCED: Refresh the underlying metadata based on the inputs that were used to create the JAXBContext.
void	setClassToGeneratedClasses(java.util.HashMap<java.lang.String,java.lang.Class> classToClass) INTERNAL: Set the map containing which Class (by name) corresponds to which generated class.
void	setQNamesToDeclaredClasses(java.util.HashMap<javax.xml.namespace.QName,java.lang.Class> nameToDeclaredClasses) INTERNAL: Set the map of which QName corresponds to which declared class.
void	setQNameToGeneratedClasses(java.util.HashMap<javax.xml.namespace.QName,java.lang.Class> qNameToClass) INTERNAL: Set the map containing which QName corresponds to which generated class.
void	setValueByXPath(java.lang.Object object, java.lang.String xPath, NamespaceResolver namespaceResolver, java.lang.Object value) Set a value on an object based on an XPath statement.
void	setXMLContext(XMLContext xmlContext)

Methods inherited from class javax.xml.bind.JAXBContext

newInstance, newInstance, newInstance, newInstance, newInstance

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_VALIDATION_EVENT_HANDLER

protected static final ValidationEventHandler DEFAULT_VALIDATION_EVENT_HANDLER

For JAXB 2 there is no explicitly defined default validation handler and the default event handling only terminates the operation after encountering a fatal error.

contextInput

protected JAXBContext.JAXBContextInput contextInput

contextState

protected volatile JAXBContext.JAXBContextState contextState

Constructor Detail

JAXBContext

protected JAXBContext()

JAXBContext

protected JAXBContext(JAXBContext.JAXBContextInput contextInput)
               throws JAXBException

Throws:

JAXBException

JAXBContext

public JAXBContext(XMLContext context)

Create a JAXBContext for a given XMLContext. The XMLContext contains the metadata about the Object to XML mappings.

JAXBContext

public JAXBContext(XMLContext context,
                   Generator generator,
                   java.lang.reflect.Type[] boundTypes)

Create a JAXBContext. The XMLContext contains the metadata about the Object to XML mappings.

JAXBContext

public JAXBContext(XMLContext context,
                   Generator generator,
                   TypeMappingInfo[] boundTypes)

Create a JAXBContext. The XMLContext contains the metadata about the Object to XML mappings.

Method Detail

getBeanValidationHelper

public BeanValidationHelper getBeanValidationHelper()

Returns BeanValidationHelper. Can return null if bean validation jar is not on class path.

getXMLInputFactory

public javax.xml.stream.XMLInputFactory getXMLInputFactory()

refreshMetadata

public void refreshMetadata()
                     throws JAXBException

ADVANCED:

Refresh the underlying metadata based on the inputs that were used to create the JAXBContext. This is particularly useful when using the virtual property mappings. The refreshMetadata call could be made in the following way:

org.eclipse.persistence.jaxb.JAXBHelper.getJAXBContext(aJAXBContext).refreshMetadata();

Note:

• As instances of Binder maintain a cache, calling refreshMetadata will not affect instances of Binder. To get the new metadata you must create a new instance of Binder after the refresh metadata call has been made.

Throws:

JAXBException

getXMLContext

public XMLContext getXMLContext()

Return the XMLContext associated with this JAXBContext.

setXMLContext

public void setXMLContext(XMLContext xmlContext)

generateSchema

public void generateSchema(SchemaOutputResolver outputResolver)

Generate a Schema for this JAXBContext

Overrides:

generateSchema in class JAXBContext

Parameters:

outputResolver - Class that decides where the schema file (of the given namespace URI) will be written

generateJsonSchema

public void generateJsonSchema(SchemaOutputResolver outputResolver,
                               java.lang.Class rootClass)

generateSchema

public void generateSchema(SchemaOutputResolver outputResolver,
                           java.util.Map<javax.xml.namespace.QName,java.lang.reflect.Type> additonalGlobalElements)

Generate a Schema for this JAXBContext

Parameters:

outputResolver - Class that decides where the schema file (of the given namespace URI) will be written

additonalGlobalElements - Map of additional global elements to be added to the generated XSD. Note that if any QName in this map conflicts with another global element (for example from a TypeMappingInfo object) then the element generated from this map will be the one that is present in the XSD.

createMarshaller

public JAXBMarshaller createMarshaller()
                                throws JAXBException

Create a JAXBMarshaller. The JAXBMarshaller is used to convert Java objects to XML.

Specified by:

createMarshaller in class JAXBContext

Returns:

a Marshaller object

Throws:

JAXBException - if an error was encountered while creating the Marshaller object

createUnmarshaller

public JAXBUnmarshaller createUnmarshaller()
                                    throws JAXBException

Create a JAXBUnmarshaller. The JAXBUnmarshaller is used to convert XML into Java objects.

Specified by:

createUnmarshaller in class JAXBContext

Returns:

an Unmarshaller object

Throws:

JAXBException - if an error was encountered while creating the Unmarshaller object

createValidator

public JAXBValidator createValidator()

Create a JAXBValidator. The JAXBValidator is used to validate Java objects against an XSD.

Specified by:

createValidator in class JAXBContext

Returns:

a Validator object

createBinder

public JAXBBinder createBinder()

Create a JAXBBinder. The JAXBBinder is used to preserve unmapped XML Data.

Overrides:

createBinder in class JAXBContext

Returns:

always a new valid Binder object.

createBinder

public <T> JAXBBinder createBinder(java.lang.Class<T> nodeClass)

Create a JAXBBinder. The JAXBBinder is used to preserve unmapped XML Data.

Overrides:

createBinder in class JAXBContext

Parameters:

nodeClass - The DOM Node class to use

Returns:

always a new valid Binder object.

createJAXBIntrospector

public JAXBIntrospector createJAXBIntrospector()

Creates a JAXBIntrospector object. The JAXBIntrospector allows the user to access certain pieces of metadata about an instance of a JAXB bound class.

Overrides:

createJAXBIntrospector in class JAXBContext

Returns:

always return a non-null valid JAXBIntrospector object.

setQNameToGeneratedClasses

public void setQNameToGeneratedClasses(java.util.HashMap<javax.xml.namespace.QName,java.lang.Class> qNameToClass)

INTERNAL: Set the map containing which QName corresponds to which generated class.

getClassToGeneratedClasses

public java.util.Map<java.lang.String,java.lang.Class> getClassToGeneratedClasses()

INTERNAL: Get the map containing which Class (by name) corresponds to which generated class.

setClassToGeneratedClasses

public void setClassToGeneratedClasses(java.util.HashMap<java.lang.String,java.lang.Class> classToClass)

INTERNAL: Set the map containing which Class (by name) corresponds to which generated class.

applyORMMetadata

public void applyORMMetadata(org.eclipse.persistence.internal.sessions.AbstractSession ormSession)

ADVANCED: Adjust the OXM metadata to take into account ORM mapping metadata

getQNamesToDeclaredClasses

public java.util.Map<javax.xml.namespace.QName,java.lang.Class> getQNamesToDeclaredClasses()

INTERNAL: Get the map of which QName corresponds to which declared class.

setQNamesToDeclaredClasses

public void setQNamesToDeclaredClasses(java.util.HashMap<javax.xml.namespace.QName,java.lang.Class> nameToDeclaredClasses)

INTERNAL: Set the map of which QName corresponds to which declared class.

getArrayClassesToGeneratedClasses

public java.util.Map<java.lang.String,java.lang.Class> getArrayClassesToGeneratedClasses()

INTERNAL: Get the map for which array class (by name) corresponds to which generated class

getCollectionClassesToGeneratedClasses

public java.util.Map<java.lang.reflect.Type,java.lang.Class> getCollectionClassesToGeneratedClasses()

INTERNAL: Get the map for which collection class (by Type) corresponds to which generated class

initTypeToSchemaType

public void initTypeToSchemaType()

INTERNAL: Populate the map of which Type corresponds to which QName. The keys should be all the boundTypes used to create the JAXBContext. If the JAXBContext was not created with the constructor that takes a Type[] then this Map will be empty.

getTypeMappingInfoToSchemaType

public java.util.Map<TypeMappingInfo,javax.xml.namespace.QName> getTypeMappingInfoToSchemaType()

INTERNAL: Get the map of which TypeMappingInfo corresponds to which QName. The keys should be all the boundTypes used to create the JAXBContext. If the JAXBContext was not created with the constructor that takes a TypeMappingInfo[] this Map will be empty.

getTypeToSchemaType

public java.util.Map<java.lang.reflect.Type,javax.xml.namespace.QName> getTypeToSchemaType()

INTERNAL: Get the map of which Type corresponds to which QName. The keys should be all the boundTypes used to create the JAXBContext. If the JAXBContext was not created with the constructor that takes a Type[] then this Map will be empty.

getValueByXPath

public <T> T getValueByXPath(java.lang.Object object,
                             java.lang.String xPath,
                             NamespaceResolver namespaceResolver,
                             java.lang.Class<T> returnType)

Get a value from an object based on an XPath statement.

Type Parameters:

T - The return type of this method corresponds to the returnType parameter.

Parameters:

object - The XPath will be executed relative to this object.

xPath - The XPath statement.

namespaceResolver - A NamespaceResolver containing the prefix/URI pairings from the XPath statement.

returnType - The return type.

Returns:

The object corresponding to the XPath or null if no result was found.

setValueByXPath

public void setValueByXPath(java.lang.Object object,
                            java.lang.String xPath,
                            NamespaceResolver namespaceResolver,
                            java.lang.Object value)

Set a value on an object based on an XPath statement.

Parameters:

object - The XPath will be executed relative to this object.

xPath - The XPath statement.

namespaceResolver - A NamespaceResolver containing the prefix/URI pairings from the XPath statement.

value - The value to be set.

createByQualifiedName

public java.lang.Object createByQualifiedName(java.lang.String namespace,
                                              java.lang.String typeName,
                                              boolean isGlobalType)

Create a new object instance for a given XML namespace and name.

Parameters:

namespace - The namespace of the complex type to create a new Java instance of.

typeName - The XML type name to create a new Java instance of.

isGlobalType - True if the object to be created represents a global type, false if it represents a global element.

Returns:

An instance of the Java class mapped to the indicated XML type, or null if no result was found.

createByXPath

public <T> T createByXPath(java.lang.Object parentObject,
                           java.lang.String xPath,
                           NamespaceResolver namespaceResolver,
                           java.lang.Class<T> returnType)

Create a new object instance for a given XPath, relative to the parentObject.

Type Parameters:

T - The return type of this method corresponds to the returnType parameter.

Parameters:

parentObject - The XPath will be executed relative to this object.

xPath - The XPath statement.

namespaceResolver - A NamespaceResolver containing the prefix/URI pairings from the XPath statement.

returnType - The return type.

Returns:

An instance of the Java class mapped to the supplied XML type, or null if no result was found.

createObjectGraph

public ObjectGraph createObjectGraph(java.lang.Class type)

createObjectGraph

public ObjectGraph createObjectGraph(java.lang.String typeName)

createJAXBElementFromXMLRoot

protected JAXBElement createJAXBElementFromXMLRoot(org.eclipse.persistence.internal.oxm.Root xmlRoot,
                                                   java.lang.Class declaredType)

createJAXBElement

protected JAXBElement createJAXBElement(javax.xml.namespace.QName qname,
                                        java.lang.Class theClass,
                                        java.lang.Object value)

hasSwaRef

public boolean hasSwaRef()

Returns true if any Object in this context contains a property annotated with an XmlAttachmentRef annotation.

Returns: