Constructor Detail

• XPathDynamicContext

  protected XPathDynamicContext​(XPathContextMajor contextObject,
                                SlotManager stackFrameMap)

Method Detail

• setContextNode

  public void setContextNode​(javax.xml.transform.Source source)
                      throws XPathException

  Set the context item to a node derived from a supplied Source object. This may be any implementation of the Source interface recognized by Saxon. Note that the Saxon NodeInfo interface, representing a node in a tree, is one such implementation; others include StreamSource, SAXSource, and DOMSource

  Parameters:

  source - The source object representing the node that will be used as the context item

  Throws:

  XPathException - if a failure occurs reading or parsing a Source object to build an input tree, or if the source is a document that was built under the wrong configuration

• setContextItem

  public void setContextItem​(Item item)
                      throws XPathException

  Set the context item for evaluation of the XPath Expression

  Parameters:

  item - the context item

  Throws:

  XPathException - if the node is in a document that was built under the wrong configuration

• getContextItem

  public Item getContextItem​()

  Get the context item

  Returns:

  the context item if there is one, or null otherwise

• setVariable

  public void setVariable​(XPathVariable variable,
                          ValueRepresentation value)
                   throws XPathException

  Set the value of an external variable used within the XPath expression

  Parameters:

  variable - the object representing the variable, as returned by the XPathEvaluator.declareVariable(String, String) method. Note that setting the value of a variable does not modify the XPathVariable object itself, which means that this method is thread-safe.

  value - The value of the variable.

  Throws:

  XPathException - if the supplied value does not conform to the required type of the variable; or if the supplied value contains a node that does not belong to this Configuration (or another Configuration that shares the same namePool)

• getXPathContextObject

  public XPathContext getXPathContextObject​()

  For system use: get the wrapped XPathContext object

  Returns:

  the underlying XPathContext object

• checkExternalVariables

  protected void checkExternalVariables​(SlotManager stackFrameMap,
                                        int numberOfExternals)
                                 throws XPathException

  Check that all external variables have been given a value

  Parameters:

  stackFrameMap - describes the stack frame

  numberOfExternals - the number of variables that need to be supplied

  Throws:

  XPathException - if required variables have not been given a value