oracle.fabric.common.xml.xpath

Interface IXPathFunction

public interface IXPathFunction

Interface for implementing custom xpath function in SOA components.

Implementations of Function are functions which are used to evaluate a function-call within an XPath expression.

Lets say we want to implement a custom xpath function which gets a value of w3c node, the function name is getNodeValue(arg1) XPath function. Here is the code, which implements this function:

 package com.collaxa.cube.xml.xpath.functions.xml;
 public class GetNodeValue implements IXPathFunction  
 {
 
   Object call(IXPathContext context, List args) throws XPathFunctionException 
   {
       org.w3c.dom.Node node = (org.w3c.dom.Node) args.get(0);
       return node.getNodeValue()
    }
 }
 

Method Summary

Modifier and Type	Method and Description
java.lang.Object	call(IXPathContext context, java.util.List args) Call this XPath function.

Method Detail

call

java.lang.Object call(IXPathContext context,
                      java.util.List args)
               throws XPathFunctionException

Call this XPath function.

Parameters:

context - The context at the point in the expression when the function is called.

args - List of arguments provided during the call of the function.

Returns:

The result of the XPath function.

Throws:

XPathFunctionException