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## net.sf.saxon.option.xom
Class XOMObjectModel

    java.lang.Object
      net.sf.saxon.om.TreeModel
          net.sf.saxon.option.xom.XOMObjectModel

All Implemented Interfaces:
  Serializable, ExternalObjectModel

    public class XOMObjectModel

extends TreeModel
implements ExternalObjectModel, 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 JDOM Documents.

This is a singleton class whose instance can be obtained using the `getInstance()` method. However, the constructor is public for backwards compatibility.

The class extends `TreeModel` so that any interface expected a TreeModel, for example `XdmDestination.setTreeModel(net.sf.saxon.om.TreeModel)`, can take `XOMObjectModel.getInstance()` as an argument.

See Also:
  Serialized Form

Field Summary

Fields inherited from class net.sf.saxon.om.TreeModel
`LINKED_TREE, TINY_TREE, TINY_TREE_CONDENSED`

Constructor Summary
`XOMObjectModel()`

Method Summary
`Object` | `convertXPathValueToObject(Value value, Object targetClass)` Convert an XPath value to an object in this object model.
`Receiver` | `getDocumentBuilder(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.
`String` | `getIdentifyingURI()` Get the URI of the external object model as used in the JAXP factory interfaces for obtaining an XPath implementation
`static XOMObjectModel` | `getInstance()`
`JPConverter` | `getJPConverter(Class sourceClass)` Get a converter from values in the external object model to XPath values.
`PJConverter` | `getNodeListCreator(Object node)` Get a converter that converts a sequence of XPath nodes to this model's representation of a node list.
`PJConverter` | `getPJConverter(Class targetClass)` Get a converter from XPath values to values in the external object model
`boolean` | `isRecognizedNode(Object object)` Test whether this object model recognizes a given node as one of its own
`boolean` | `isRecognizedNodeClass(Class nodeClass)` Test whether this object model recognizes a given class as representing a node in that object model.
`Builder` | `makeBuilder(PipelineConfiguration pipe)` Make a Builder to construct an instance of this tree model from a stream of events
`boolean` | `sendSource(Source source, Receiver receiver)` 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(Source source, Configuration config)` Wrap or unwrap a node using this object model to return the corresponding Saxon node.
`DocumentInfo` | `wrapDocument(Object node, String baseURI, Configuration config)` Wrap a document node in the external object model in a document wrapper that implements the Saxon DocumentInfo interface
`NodeInfo` | `wrapNode(DocumentInfo document, Object node)` Wrap a node within the external object model in a node wrapper that implements the Saxon VirtualNode interface (which is an extension of NodeInfo)

Methods inherited from class net.sf.saxon.om.TreeModel
`getSymbolicValue, getTreeModel, isMutable`

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

Constructor Detail

### XOMObjectModel

    public XOMObjectModel()

Method Detail

### getInstance

    public static XOMObjectModel getInstance()

### getIdentifyingURI

    public 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`
  Returns:
    the URI used to identify this object model in the JAXP XPath factory mechanism.

### makeBuilder

    public Builder makeBuilder(PipelineConfiguration pipe)

  Description copied from class: `TreeModel`
  Make a Builder to construct an instance of this tree model from a stream of events

  Specified by:
    `makeBuilder` in class `TreeModel`
  Returns:
    a newly created Builder @param pipe

### getPJConverter

    public PJConverter getPJConverter(Class targetClass)

  Description copied from interface: `ExternalObjectModel`
  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(Class sourceClass)

  Description copied from interface: `ExternalObjectModel`
  Get a converter from values in the external object model to XPath values.

  Specified by:
    `getJPConverter` in interface `ExternalObjectModel`
  Parameters:
    `sourceClass` - the class (static or dynamic) of values to be converted
  Returns:
    a converter, if the sourceClass is recognized as belonging to this object model; otherwise null

### getNodeListCreator

    public PJConverter getNodeListCreator(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

### isRecognizedNode

    public boolean isRecognizedNode(Object object)

  Test whether this object model recognizes a given node as one of its own

### isRecognizedNodeClass

    public boolean isRecognizedNodeClass(Class nodeClass)

  Test whether this object model recognizes a given class as representing a node in that object model. This method will generally be called at compile time.

  Parameters:
    `nodeClass` - A class that possibly represents nodes
  Returns:
    true if the class is used to represent nodes in this object model

### getDocumentBuilder

    public Receiver getDocumentBuilder(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. 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

### sendSource

    public boolean sendSource(Source source,
                              Receiver receiver)
                       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
  Returns:
    true if the data from the Source has been sent to the Receiver, false otherwise
  Throws:
    `XPathException`

### unravel

    public NodeInfo unravel(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

### convertXPathValueToObject

    public Object convertXPathValueToObject(Value value,
                                            Object targetClass)
                                     throws XPathException

  Convert an XPath value to an object in this object model. If the supplied value can be converted to an object in this model, of the specified class, then the conversion should be done and the resulting object returned. If the value cannot be converted, the method should return null. Note that the supplied class might be a List, in which case the method should inspect the contents of the Value to see whether they belong to this object model.

  Throws:
    `XPathException`

### wrapDocument

    public DocumentInfo wrapDocument(Object node,
                                     String baseURI,
                                     Configuration config)

  Wrap a document node in the external object model in a document wrapper that implements the Saxon DocumentInfo interface

  Parameters:
    `node` - a node (any node) in the third party document
    `baseURI` - the base URI of the node (supply "" if unknown)
    `config` - the Saxon configuration (which among other things provides access to the NamePool)
  Returns:
    the wrapper, which must implement DocumentInfo

### wrapNode

    public NodeInfo wrapNode(DocumentInfo document,
                             Object node)

  Wrap a node within the external object model in a node wrapper that implements the Saxon VirtualNode interface (which is an extension of NodeInfo)

  Parameters:
    `document` - the document wrapper, as a DocumentInfo object
    `node` - the node to be wrapped. This must be a node within the document wrapped by the DocumentInfo provided in the first argument
  Returns:
    the wrapper for the node, as an instance of VirtualNode

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Copyright (c) 2004-2010 Saxonica Limited. All rights reserved.