org.apache.xpath.functions
Class FuncPosition

java.lang.Object
  |
  +--org.apache.xpath.Expression
        |
        +--org.apache.xpath.functions.Function
              |
              +--org.apache.xpath.functions.FuncPosition

public class FuncPosition
extends Function

Execute the Position() function.

See Also:
Serialized Form
Usage:
**For advanced use only**

Constructor Summary
FuncPosition()
           
 
Method Summary
 XObject execute(XPathContext xctxt)
          Execute the function.
 void fixupVariables(java.util.Vector vars, int globalsSize)
          No arguments to process, so this does nothing.
 int getPositionInContextNodeList(XPathContext xctxt)
          Get the position in the current context node list.
 void postCompileStep(Compiler compiler)
          Figure out if we're executing a toplevel expression.
 
Methods inherited from class org.apache.xpath.functions.Function
callArgVisitors, callVisitors, checkNumberArgs, deepEquals, setArg
 
Methods inherited from class org.apache.xpath.Expression
asIterator, asIteratorRaw, asNode, assertion, bool, canTraverseOutsideSubtree, error, execute, execute, execute, executeCharsToContentHandler, exprAddChild, exprGetChild, exprGetNumChildren, exprGetParent, exprSetParent, getColumnNumber, getExpressionOwner, getLineNumber, getPublicId, getSystemId, isNodesetExpr, isStableNumber, num, warn, xstr
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

FuncPosition

public FuncPosition()
Method Detail

postCompileStep

public void postCompileStep(Compiler compiler)
Figure out if we're executing a toplevel expression. If so, we can't be inside of a predicate.
Overrides:
postCompileStep in class Function

getPositionInContextNodeList

public int getPositionInContextNodeList(XPathContext xctxt)
Get the position in the current context node list.
Parameters:
xctxt - Runtime XPath context.
Returns:
The current position of the itteration in the context node list, or -1 if there is no active context node list.

execute

public XObject execute(XPathContext xctxt)
                throws TransformerException
Execute the function. The function must return a valid object.
Parameters:
xctxt - The current execution context.
Returns:
A valid XObject.
Throws:
TransformerException -  
Overrides:
execute in class Function

fixupVariables

public void fixupVariables(java.util.Vector vars,
                           int globalsSize)
No arguments to process, so this does nothing.
Overrides:
fixupVariables in class Expression


Copyright 2006 Apache XML Project. All Rights Reserved.