Class XOMObjectModel

  • All Implemented Interfaces:
    java.io.Serializable, ExternalObjectModel

    public class XOMObjectModel
    extends TreeModel
    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 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
    • Constructor Summary

      Constructors 
      Constructor Description
      XOMObjectModel()  
    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.lang.Object convertXPathValueToObject​(Value value, java.lang.Object targetClass)
      Convert an XPath value to an object in this object model.
      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 XOMObjectModel getInstance()  
      JPConverter getJPConverter​(java.lang.Class sourceClass)
      Get a converter from values in the external object model to XPath values.
      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 isRecognizedNode​(java.lang.Object object)
      Test whether this object model recognizes a given node as one of its own
      boolean isRecognizedNodeClass​(java.lang.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​(javax.xml.transform.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​(javax.xml.transform.Source source, Configuration config)
      Wrap or unwrap a node using this object model to return the corresponding Saxon node.
      DocumentInfo wrapDocument​(java.lang.Object node, java.lang.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, java.lang.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 java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • XOMObjectModel

        public XOMObjectModel()
    • Method Detail

      • 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
        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​(java.lang.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​(java.lang.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​(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
      • isRecognizedNode

        public boolean isRecognizedNode​(java.lang.Object object)
        Test whether this object model recognizes a given node as one of its own
      • isRecognizedNodeClass

        public boolean isRecognizedNodeClass​(java.lang.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​(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. 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​(javax.xml.transform.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 - if any failure occurs
      • 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
      • convertXPathValueToObject

        public java.lang.Object convertXPathValueToObject​(Value value,
                                                          java.lang.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​(java.lang.Object node,
                                         java.lang.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,
                                 java.lang.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