org.apache.xpath
Class XPathContext.XPathExpressionContext

java.lang.Object
  |
  +--org.apache.xpath.XPathContext.XPathExpressionContext

public class XPathContext.XPathExpressionContext
extends java.lang.Object
implements ExpressionContext


Constructor Summary
XPathContext.XPathExpressionContext()
           
 
Method Summary
 Node getContextNode()
          Get the current context node.
 NodeIterator getContextNodes()
          Get the current context node list.
 DTMManager getDTMManager()
          Return the DTMManager object.
 ErrorListener getErrorListener()
          Get the error listener.
 XObject getVariableOrParam(QName qname)
          Get a variable based on it's qualified name.
 XPathContext getXPathContext()
          Return the XPathContext associated with this XPathExpressionContext.
 double toNumber(Node n)
          Get the value of a node as a number.
 java.lang.String toString(Node n)
          Get the value of a node as a string.
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

XPathContext.XPathExpressionContext

public XPathContext.XPathExpressionContext()
Method Detail

getXPathContext

public XPathContext getXPathContext()
Return the XPathContext associated with this XPathExpressionContext. Extensions should use this judiciously and only when special processing requirements cannot be met another way. Consider requesting an enhancement to the ExpressionContext interface to avoid having to call this method.
Specified by:
getXPathContext in interface ExpressionContext
Returns:
the XPathContext associated with this XPathExpressionContext.

getDTMManager

public DTMManager getDTMManager()
Return the DTMManager object. Though XPathContext context extends the DTMManager, it really is a proxy for the real DTMManager. If a caller needs to make a lot of calls to the DTMManager, it is faster if it gets the real one from this function.

getContextNode

public Node getContextNode()
Get the current context node.
Specified by:
getContextNode in interface ExpressionContext
Returns:
The current context node.

getContextNodes

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

getErrorListener

public ErrorListener getErrorListener()
Get the error listener.
Specified by:
getErrorListener in interface ExpressionContext
Returns:
The registered error listener.

toNumber

public double toNumber(Node n)
Get the value of a node as a number.
Specified by:
toNumber in interface ExpressionContext
Parameters:
n - Node to be converted to a number. May be null.
Returns:
value of n as a number.

toString

public java.lang.String toString(Node n)
Get the value of a node as a string.
Specified by:
toString in interface ExpressionContext
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

public final XObject getVariableOrParam(QName qname)
                                 throws TransformerException
Get a variable based on it's qualified name.
Specified by:
getVariableOrParam in interface ExpressionContext
Parameters:
qname - The qualified name of the variable.
Returns:
The evaluated value of the variable.
Throws:
TransformerException -  


Copyright 2006 Apache XML Project. All Rights Reserved.