org.apache.xpath.functions
Class Function
java.lang.Object
|
+--org.apache.xpath.Expression
|
+--org.apache.xpath.functions.Function
- Direct Known Subclasses:
- FuncCurrent, FuncExtFunction, FuncFalse, FuncLast, FuncPosition, FunctionOneArg, FuncTrue
- public class Function
- extends Expression
**For advanced use only**
This is a superclass of all XPath functions. This allows two
ways for the class to be called. One method is that the
super class processes the arguments and hands the results to
the derived class, the other method is that the derived
class may process it's own arguments, which is faster since
the arguments don't have to be added to an array, but causes
a larger code footprint.
Constructor Summary |
Function()
**For advanced use only** |
Methods inherited from class java.lang.Object |
equals,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait |
Function
public Function()
setArg
public void setArg(Expression arg,
int argNum)
throws WrongNumberArgsException
checkNumberArgs
public void checkNumberArgs(int argNum)
throws WrongNumberArgsException
execute
public XObject execute(XPathContext xctxt)
throws SAXException
- **For advanced use only** Execute an XPath function object. The function must return
a valid object.
- Parameters:
xctxt
- The execution current context.- Returns:
- A valid XObject.
- Overrides:
- execute in class Expression
Copyright © 2000 Apache XML Project. All Rights Reserved.