Top Description Constructors Methods
javax.xml.bind

public abstract Class Binder<XmlNode>

extends Object
Class Inheritance
Imports
org.w3c.dom.Node, javax.xml.validation.Schema

Enable synchronization between XML infoset nodes and JAXB objects representing same XML document.

An instance of this class maintains the association between XML nodes of an infoset preserving view and a JAXB representation of an XML document. Navigation between the two views is provided by the methods getXMLNode(Object) and getJAXBNode(Object).

Modifications can be made to either the infoset preserving view or the JAXB representation of the document while the other view remains unmodified. The binder is able to synchronize the changes made in the modified view back into the other view using the appropriate Binder update methods, updateXML(Object, Object) or updateJAXB(Object).

A typical usage scenario is the following:

A Binder instance is created using the factory method JAXBContext#createBinder() or JAXBContext#createBinder(Class).

The template parameter, XmlNode, is the root interface/class for the XML infoset preserving representation. A Binder implementation is required to minimally support an XmlNode value of org.w3c.dom.Node.class. A Binder implementation can support alternative XML infoset preserving representations.

Author
Kohsuke Kawaguchi ([email protected]) Joseph Fialli
Since
1.6, JAXB 2.0

Constructor Summary

AccessConstructor and Description
public

Method Summary

Modifier and TypeMethod and Description
public abstract ValidationEventHandler

Returns:

the current ValidationEventHandler or the default event handler if it hasn't been set
getEventHandler
()

Return the current event handler or the default event handler if one hasn't been set.

public abstract Object

Returns:

null if the specified XML node is not known to this Binder, or if it is not associated with a JAXB object.
getJAXBNode
(XmlNode xmlNode)

Gets the JAXB object associated with the given XML element.

public abstract Object

Returns:

the value of the requested property
getProperty
(String
the name of the property to retrieve
name
)

Get the particular property in the underlying implementation of Binder.

public abstract Schema

Returns:

the Schema object for validation or null if not present
getSchema
()

Gets the last Schema object (including null) set by the setSchema(Schema) method.

public abstract XmlNode

Returns:

null if the specified JAXB object is not known to this Binder, or if it is not associated with an XML element.
getXMLNode
(Object
An instance that is reachable from a prior call to a bind or update method that returned a JAXB object tree.
jaxbObject
)

Gets the XML element associated with the given JAXB object.

public abstract void
marshal(Object
The content tree to be marshalled.
jaxbObject
,
XmlNode
The parameter must be a Node that accepts children.
xmlNode
)

Marshal a JAXB object tree to a new XML document.

public abstract void
setEventHandler(ValidationEventHandler
the validation event handler
handler
)

Allow an application to register a ValidationEventHandler.

public abstract void
setProperty(String
the name of the property to be set. This value can either be specified using one of the constant fields or a user supplied string.
name
,
Object
the value of the property to be set
value
)

Set the particular property in the underlying implementation of Binder.

public abstract void
setSchema(Schema
set to null to disable validation.
schema
)

Specifies whether marshal, unmarshal and update methods performs validation on their XML content.

public abstract Object

Returns:

the newly created root object of the JAXB object tree.
unmarshal
(XmlNode
the document/element to unmarshal XML data from.
xmlNode
)

Unmarshal XML infoset view to a JAXB object tree.

public abstract <T> JAXBElement<T>

Returns:

JAXB Element representation of node
unmarshal
(XmlNode
the document/element to unmarshal XML data from.
xmlNode
,
Class<T>
appropriate JAXB mapped class to hold node's XML data.
declaredType
)

Unmarshal XML root element by provided declaredType to a JAXB object tree.

public abstract Object

Returns:

Returns the updated JAXB object. Typically, this is the same object that was returned from earlier marshal(Object, Object) or updateJAXB(Object) method invocation, but it maybe a different object, for example when the name of the XML element has changed.
updateJAXB
(XmlNode xmlNode)

Takes an XML node and updates its associated JAXB object and its descendants.

public abstract XmlNode
updateXML(Object jaxbObject)

Takes an JAXB object and updates its associated XML node and its descendants.

public abstract XmlNode

Returns:

Returns the updated XML node. Typically, this is the same node you passed in as xmlNode, but it maybe a different object, for example when the tag name of the object has changed.
updateXML
(Object
root of potentially modified JAXB object tree
jaxbObject
,
XmlNode
root of update target XML parse tree
xmlNode
)

Changes in JAXB object tree are updated in its associated XML parse tree.

Inherited from java.lang.Object:
cloneequalsfinalizegetClasshashCodenotifynotifyAlltoStringwaitwaitwait

Constructor Detail

Binderback to summary
public Binder()

Method Detail

getEventHandlerback to summary
public abstract ValidationEventHandler getEventHandler() throws JAXBException

Return the current event handler or the default event handler if one hasn't been set.

Returns:ValidationEventHandler

the current ValidationEventHandler or the default event handler if it hasn't been set

Exceptions
JAXBException:
if an error was encountered while getting the current event handler
getJAXBNodeback to summary
public abstract Object getJAXBNode(XmlNode xmlNode)

Gets the JAXB object associated with the given XML element.

Once a JAXB object tree is associated with an XML fragment, this method enables navigation between the two trees.

An association between an XML element and a JAXB object is established by the unmarshal, marshal and update methods. Note that this association is partial; not all XML elements have associated JAXB objects, and not all JAXB objects have associated XML elements.

Returns:Object

null if the specified XML node is not known to this Binder, or if it is not associated with a JAXB object.

Exceptions
IllegalArgumentException:
If the node parameter is null
getPropertyback to summary
public abstract Object getProperty(String name) throws PropertyException

Get the particular property in the underlying implementation of Binder. This method can only be used to get one of the standard JAXB defined unmarshal/marshal properties or a provider specific property for binder, unmarshal or marshal. Attempting to get an undefined property will result in a PropertyException being thrown. See Supported Unmarshal Properties and Supported Marshal Properties.

Parameters
name:String

the name of the property to retrieve

Returns:Object

the value of the requested property

Exceptions
PropertyException:
when there is an error retrieving the given property or value property name
IllegalArgumentException:
If the name parameter is null
getSchemaback to summary
public abstract Schema getSchema()

Gets the last Schema object (including null) set by the setSchema(Schema) method.

Returns:Schema

the Schema object for validation or null if not present

getXMLNodeback to summary
public abstract XmlNode getXMLNode(Object jaxbObject)

Gets the XML element associated with the given JAXB object.

Once a JAXB object tree is associated with an XML fragment, this method enables navigation between the two trees.

An association between an XML element and a JAXB object is established by the bind methods and the update methods. Note that this association is partial; not all XML elements have associated JAXB objects, and not all JAXB objects have associated XML elements.

Parameters
jaxbObject:Object

An instance that is reachable from a prior call to a bind or update method that returned a JAXB object tree.

Returns:XmlNode

null if the specified JAXB object is not known to this Binder, or if it is not associated with an XML element.

Exceptions
IllegalArgumentException:
If the jaxbObject parameter is null
marshalback to summary
public abstract void marshal(Object jaxbObject, XmlNode xmlNode) throws JAXBException

Marshal a JAXB object tree to a new XML document.

This method is similar to Marshaller#marshal(Object, Node) with the addition of maintaining the association between JAXB objects and the produced XML nodes, enabling future update operations such as updateXML(Object, Object) or updateJAXB(Object).

When getSchema() is non-null, the marshalled xml content is validated during this operation.

Parameters
jaxbObject:Object

The content tree to be marshalled.

xmlNode:XmlNode

The parameter must be a Node that accepts children.

Exceptions
JAXBException:
If any unexpected problem occurs during the marshalling.
MarshalException:
If the ValidationEventHandler returns false from its handleEvent method or the Binder is unable to marshal jaxbObject (or any object reachable from jaxbObject).
IllegalArgumentException:
If any of the method parameters are null
setEventHandlerback to summary
public abstract void setEventHandler(ValidationEventHandler handler) throws JAXBException

Allow an application to register a ValidationEventHandler.

The ValidationEventHandler will be called by the JAXB Provider if any validation errors are encountered during calls to any of the Binder unmarshal, marshal and update methods.

Calling this method with a null parameter will cause the Binder to revert back to the default default event handler.

Parameters
handler:ValidationEventHandler

the validation event handler

Exceptions
JAXBException:
if an error was encountered while setting the event handler
setPropertyback to summary
public abstract void setProperty(String name, Object value) throws PropertyException

Set the particular property in the underlying implementation of Binder. This method can only be used to set one of the standard JAXB defined unmarshal/marshal properties or a provider specific property for binder, unmarshal or marshal. Attempting to set an undefined property will result in a PropertyException being thrown. See Supported Unmarshal Properties and Supported Marshal Properties.

Parameters
name:String

the name of the property to be set. This value can either be specified using one of the constant fields or a user supplied string.

value:Object

the value of the property to be set

Exceptions
PropertyException:
when there is an error processing the given property or value
IllegalArgumentException:
If the name parameter is null
setSchemaback to summary
public abstract void setSchema(Schema schema)

Specifies whether marshal, unmarshal and update methods performs validation on their XML content.

Parameters
schema:Schema

set to null to disable validation.

See Also
Unmarshaller#setSchema(Schema)
unmarshalback to summary
public abstract Object unmarshal(XmlNode xmlNode) throws JAXBException

Unmarshal XML infoset view to a JAXB object tree.

This method is similar to Unmarshaller#unmarshal(Node) with the addition of maintaining the association between XML nodes and the produced JAXB objects, enabling future update operations, updateXML(Object, Object) or updateJAXB(Object).

When getSchema() is non-null, xmlNode and its descendants is validated during this operation.

This method throws UnmarshalException when the Binder's JAXBContext does not have a mapping for the XML element name or the type, specifiable via @xsi:type, of xmlNode to a JAXB mapped class. The method unmarshal(Object, Class) enables an application to specify the JAXB mapped class that the xmlNode should be mapped to.

Parameters
xmlNode:XmlNode

the document/element to unmarshal XML data from.

Returns:Object

the newly created root object of the JAXB object tree.

Exceptions
JAXBException:
If any unexpected errors occur while unmarshalling
UnmarshalException:
If the ValidationEventHandler returns false from its handleEvent method or the Binder is unable to perform the XML to Java binding.
IllegalArgumentException:
If the node parameter is null
unmarshalback to summary
public abstract <T> JAXBElement<T> unmarshal(XmlNode xmlNode, Class<T> declaredType) throws JAXBException

Unmarshal XML root element by provided declaredType to a JAXB object tree.

Implements Unmarshal by Declared Type

This method is similar to Unmarshaller#unmarshal(Node, Class) with the addition of maintaining the association between XML nodes and the produced JAXB objects, enabling future update operations, updateXML(Object, Object) or updateJAXB(Object).

When getSchema() is non-null, xmlNode and its descendants is validated during this operation.

Parameters
xmlNode:XmlNode

the document/element to unmarshal XML data from.

declaredType:Class<T>

appropriate JAXB mapped class to hold node's XML data.

Returns:JAXBElement<T>

JAXB Element representation of node

Exceptions
JAXBException:
If any unexpected errors occur while unmarshalling
UnmarshalException:
If the ValidationEventHandler returns false from its handleEvent method or the Binder is unable to perform the XML to Java binding.
IllegalArgumentException:
If any of the input parameters are null
Since
1.6, JAXB 2.0
updateJAXBback to summary
public abstract Object updateJAXB(XmlNode xmlNode) throws JAXBException

Takes an XML node and updates its associated JAXB object and its descendants.

This operation can be thought of as an "in-place" unmarshalling. The difference is that instead of creating a whole new JAXB tree, this operation updates an existing tree, reusing as much JAXB objects as possible.

As a side-effect, this operation updates the association between XML nodes and JAXB objects.

Returns:Object

Returns the updated JAXB object. Typically, this is the same object that was returned from earlier marshal(Object, Object) or updateJAXB(Object) method invocation, but it maybe a different object, for example when the name of the XML element has changed.

Exceptions
JAXBException:
If any unexpected problem occurs updating corresponding JAXB mapped content.
IllegalArgumentException:
If node parameter is null
updateXMLback to summary
public abstract XmlNode updateXML(Object jaxbObject) throws JAXBException

Takes an JAXB object and updates its associated XML node and its descendants.

This is a convenience method of:

updateXML( jaxbObject, getXMLNode(jaxbObject));
Exceptions
JAXBException:
If any unexpected problem occurs updating corresponding XML content.
IllegalArgumentException:
If the jaxbObject parameter is null
updateXMLback to summary
public abstract XmlNode updateXML(Object jaxbObject, XmlNode xmlNode) throws JAXBException

Changes in JAXB object tree are updated in its associated XML parse tree.

This operation can be thought of as an "in-place" marshalling. The difference is that instead of creating a whole new XML tree, this operation updates an existing tree while trying to preserve the XML as much as possible.

For example, unknown elements/attributes in XML that were not bound to JAXB will be left untouched (whereas a marshalling operation would create a new tree that doesn't contain any of those.)

As a side-effect, this operation updates the association between XML nodes and JAXB objects.

Parameters
jaxbObject:Object

root of potentially modified JAXB object tree

xmlNode:XmlNode

root of update target XML parse tree

Returns:XmlNode

Returns the updated XML node. Typically, this is the same node you passed in as xmlNode, but it maybe a different object, for example when the tag name of the object has changed.

Exceptions
JAXBException:
If any unexpected problem occurs updating corresponding XML content.
IllegalArgumentException:
If any of the input parameters are null