org.eclipse.jet.xpath
Interface XPathFunction

public interface XPathFunction

Interface to an XPath function implementation. Functions that require the XPath context should also implement XPathFunctionWithContext.

Note: Once JET moves to Java 1.5 or later only, this interface will be migrated to javax.xml.xpath.XPathFunction

Method Summary

java.lang.Object

evaluate(java.util.List args) Evaluate the function with given the arguments.

Method Detail

evaluate

java.lang.Object evaluate(java.util.List args)

Evaluate the function with given the arguments. The types of arguments should be one of

NodeSet representing a result of an XPath path expression

Double representing a numeric value

String representing a string value

Boolean representing a logical value

Parameters:

args - a non-null List of arguments.

Returns:

the function result

Throws:

XPathRuntimeException - if the function cannot be evaluated successfully.