Class DOMEnvelope

java.lang.Object
net.sf.saxon.dom.DOMEnvelope
All Implemented Interfaces:
ExternalObjectModel
public class DOMEnvelope extends Object implements ExternalObjectModel
DOMEnvelope is an object model representation in which DOM interfaces are wrapped around Saxon NodeInfo nodes: that is, it implements the DOM on top of a Saxon tree implementation such as the tiny tree or linked tree.

  • Constructor Details

    • DOMEnvelope

      public DOMEnvelope()
      Public constructor. (Use the singular instance in preference to creating a new one).

  • Method Details

    • getInstance

      public static DOMEnvelope getInstance()
      Get the singular instance (this class is stateless)
      Returns:
      the singular instance

    • getDocumentClassName

      public String getDocumentClassName()
      Get the name of a characteristic class, which, if it can be loaded, indicates that the supporting libraries for this object model implementation are available on the classpath
      Specified by:
      getDocumentClassName in interface ExternalObjectModel
      Returns:
      by convention (but not necessarily) the class that implements a document node in the relevant external model

    • 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.

    • 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, Configuration config)
      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
      config - the Saxon Configuration object
      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
      Parameters:
      object - the object to be tested
      Returns:
      true if the supplied object is a node in this object model

    • 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.

      This implementation always returns null: it is not possible to construct an instance of this object model implementation directly as the result of a JAXP transformation.

      Specified by:
      getDocumentBuilder in interface ExternalObjectModel
      Parameters:
      result - a JAXP result object
      Returns:
      always null in this implementation

    • getActiveSource

      public ActiveSource getActiveSource(Source supplied)
      Give this ExternalObjectModel the opportunity of recognising a Source object and returning an ActiveSource, which will be used to send an instance of this external model to a supplied Receiver. The default implementation returns null.
      Specified by:
      getActiveSource in interface ExternalObjectModel
      Parameters:
      supplied - a supplied Source
      Returns:
      an ActiveSource object if the source is recognised, or null if not

    • 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