This interface defines the invocation API for user -defined XPath functions. Arguments are passed to the evaluate( ) method as a java.util.List and the return value should be an Object . evaluate( ) may throw an XPathFunctionException . See also XPathFunctionResolver . public interface XPathFunction { // Public Instance Methods Object evaluate (java.util.List args ) throws XPathFunctionException; } Returned ByXPathFunctionResolver.resolveFunction( ) |