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