net.sf.saxon.dom
Class DOMObjectModel

java.lang.Object
  net.sf.saxon.dom.DOMObjectModel

All Implemented Interfaces:

java.io.Serializable, ExternalObjectModel

public class DOMObjectModel
extends java.lang.Object
implements ExternalObjectModel, java.io.Serializable

This interface must be implemented by any third-party object model that can be wrapped with a wrapper that implements the Saxon Object Model (the NodeInfo interface). This implementation of the interface supports wrapping of DOM Documents.

See Also:

Serialized Form

Constructor Summary

DOMObjectModel()
Create an instance of the DOMObjectModel class.

Method Summary

Receiver	getDocumentBuilder(javax.xml.transform.Result result) Test whether this object model recognizes a particular kind of JAXP Result object, and if it does, return a Receiver that builds an instance of this data model from a sequence of events.
java.lang.String	getIdentifyingURI() Get the URI of the external object model as used in the JAXP factory interfaces for obtaining an XPath implementation
static DOMObjectModel	getInstance() Get a reusable instance instance of this class.
JPConverter	getJPConverter(java.lang.Class targetClass) Get a converter from XPath values to values in the external object model
PJConverter	getNodeListCreator(java.lang.Object node) Get a converter that converts a sequence of XPath nodes to this model's representation of a node list.
PJConverter	getPJConverter(java.lang.Class targetClass) Get a converter from XPath values to values in the external object model
boolean	sendSource(javax.xml.transform.Source source, Receiver receiver, PipelineConfiguration pipe) Test whether this object model recognizes a particular kind of JAXP Source object, and if it does, send the contents of the document to a supplied Receiver, and return true.
NodeInfo	unravel(javax.xml.transform.Source source, Configuration config) Wrap or unwrap a node using this object model to return the corresponding Saxon node.

Methods inherited from class java.lang.Object

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

Constructor Detail

DOMObjectModel

public DOMObjectModel()

Create an instance of the DOMObjectModel class.

When possible, use the getInstance() method in preference, as the instance is then reusable.

Method Detail

getInstance

public static DOMObjectModel getInstance()

Get a reusable instance instance of this class.

Note, this is not actually a singleton instance; the class also has a public constructor, which is needed to support the automatic loading of object models into the Configuration.

Returns:

the singleton instance

getIdentifyingURI

public java.lang.String getIdentifyingURI()

Get the URI of the external object model as used in the JAXP factory interfaces for obtaining an XPath implementation

Specified by:

getIdentifyingURI in interface ExternalObjectModel

getPJConverter

public PJConverter getPJConverter(java.lang.Class targetClass)

Get a converter from XPath values to values in the external object model

Specified by:

getPJConverter in interface ExternalObjectModel

Parameters:

targetClass - the required class of the result of the conversion. If this class represents a node or list of nodes in the external object model, the method should return a converter that takes a native node or sequence of nodes as input and returns a node or sequence of nodes in the external object model representation. Otherwise, it should return null.

Returns:

a converter, if the targetClass is recognized as belonging to this object model; otherwise null

getJPConverter

public JPConverter getJPConverter(java.lang.Class targetClass)

Description copied from interface: ExternalObjectModel

Get a converter from XPath values to values in the external object model

Specified by:

getJPConverter in interface ExternalObjectModel

Parameters:

targetClass - the required class of the result of the conversion. If this class represents a node or list of nodes in the external object model, the method should return a converter that takes an object of this class as input and returns a node or sequence of nodes in the native Saxon representation. Otherwise, it should return null.

Returns:

a converter, if the targetClass is recognized as belonging to this object model; otherwise null

getNodeListCreator

public PJConverter getNodeListCreator(java.lang.Object node)

Get a converter that converts a sequence of XPath nodes to this model's representation of a node list.

Specified by:

getNodeListCreator in interface ExternalObjectModel

Parameters:

node - an example of the kind of node used in this model

Returns:

if the model does not recognize this node as one of its own, return null. Otherwise return a PJConverter that takes a list of XPath nodes (represented as NodeInfo objects) and returns a collection of nodes in this object model

getDocumentBuilder

public Receiver getDocumentBuilder(javax.xml.transform.Result result)
                            throws XPathException

Test whether this object model recognizes a particular kind of JAXP Result object, and if it does, return a Receiver that builds an instance of this data model from a sequence of events. If the Result is not recognised, return null.

Specified by:

getDocumentBuilder in interface ExternalObjectModel

Parameters:

result - a JAXP result object

Returns:

a Receiver that writes to that result, if available; or null otherwise

Throws:

XPathException

sendSource

public boolean sendSource(javax.xml.transform.Source source,
                          Receiver receiver,
                          PipelineConfiguration pipe)
                   throws XPathException

Test whether this object model recognizes a particular kind of JAXP Source object, and if it does, send the contents of the document to a supplied Receiver, and return true. Otherwise, return false

Specified by:

sendSource in interface ExternalObjectModel

Parameters:

source - a JAXP Source object

receiver - the Receiver that is to receive the data from the Source

pipe - configuration information

Returns:

true if the data from the Source has been sent to the Receiver, false otherwise

Throws:

XPathException

unravel

public NodeInfo unravel(javax.xml.transform.Source source,
                        Configuration config)

Wrap or unwrap a node using this object model to return the corresponding Saxon node. If the supplied source does not belong to this object model, return null

Specified by:

unravel in interface ExternalObjectModel

Parameters:

source - a JAXP Source object

config - the Saxon configuration

Returns:

a NodeInfo corresponding to the Source, if this can be constructed; otherwise null