Package org.apache.xalan.extensions

Interface ExpressionContext

All Known Implementing Classes:
XPathContext.XPathExpressionContext
public interface ExpressionContext
An object that implements this interface can supply information about the current XPath expression context.

  • Method Details

    • getContextNode

      Node getContextNode()
      Get the current context node.
      Returns:
      The current context node.

    • getContextNodes

      NodeIterator getContextNodes()
      Get the current context node list.
      Returns:
      An iterator for the current context list, as defined in XSLT.

    • getErrorListener

      ErrorListener getErrorListener()
      Get the error listener.
      Returns:
      The registered error listener.

    • toNumber

      double toNumber​(Node n)
      Get the value of a node as a number.
      Parameters:
      n - Node to be converted to a number. May be null.
      Returns:
      value of n as a number.

    • toString

      String toString​(Node n)
      Get the value of a node as a string.
      Parameters:
      n - Node to be converted to a string. May be null.
      Returns:
      value of n as a string, or an empty string if n is null.

    • getVariableOrParam

      XObject getVariableOrParam​(QName qname) throws TransformerException
      Get a variable based on it's qualified name.
      Parameters:
      qname - The qualified name of the variable.
      Returns:
      The evaluated value of the variable.
      Throws:
      TransformerException

    • getXPathContext

      XPathContext getXPathContext() throws TransformerException
      Get the XPathContext that owns this ExpressionContext. Note: exslt:function requires the XPathContext to access the variable stack and TransformerImpl.
      Returns:
      The current XPathContext.
      Throws:
      TransformerException