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## org.apache.commons.jxpath
Interface Function

All Known Implementing Classes:
  ConstructorFunction, MethodFunction

    public interface Function

Extension function interface. Extension functions are grouped into `Functions` objects, which are installed on JXPathContexts using the `JXPathContext.setFunctions()` call.

The Function interface can be implemented directly. However, most of the time JXPath's built-in implementations should suffice. See `ClassFunctions` and `PackageFunctions`.

Version:
  $Revision: 652845 $ $Date: 2008-05-02 12:46:46 -0500 (Fri, 02 May 2008) $
Author:
  Dmitri Plotnikov

Method Summary
`Object` | `invoke(ExpressionContext context, Object[] parameters)` Computes the value of the function.

Method Detail

### invoke

    Object invoke(ExpressionContext context,
                  Object[] parameters)

  Computes the value of the function. Each implementation of Function is responsible for conversion of supplied parameters to the required argument types.

  Parameters:
    `context` - can be used to acquire the context in which the function is being evaluted.
    `parameters` - function arguments
  Returns:
    Object result

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