org.jaxen.function

Class NotFunction

java.lang.Object

org.jaxen.function.NotFunction

All Implemented Interfaces:

Function

public class NotFunction
extends Object
implements Function

4.3 boolean not(boolean)

The not function returns true if its argument is false, and false otherwise.

Author:

bob mcwhirter (bob @ werken.com)

See Also:

Section 4.3 of the XPath Specification

Constructor Summary

Constructors

Constructor and Description
NotFunction() Create a new NotFunction object.

Method Summary

Methods

Modifier and Type	Method and Description
Object	call(Context context, List args) Returns Boolean.TRUE if the boolean value of args.get(0) is false, and Boolean.FALSE otherwise.
static Boolean	evaluate(Object obj, Navigator nav) Returns Boolean.TRUE if the boolean value of obj is false, and Boolean.FALSE otherwise.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NotFunction

public NotFunction()

Create a new NotFunction object.

Method Detail

call

public Object call(Context context,
          List args)
            throws FunctionCallException

Returns Boolean.TRUE if the boolean value of args.get(0) is false, and Boolean.FALSE otherwise. The boolean value is calculated as if by the XPath boolean function.

Specified by:

call in interface Function

Parameters:

context - the context at the point in the expression where the function is called

args - a single element list

Returns:

Boolean.TRUE if the boolean value of obj is false, and Boolean.FALSE otherwise

Throws:

FunctionCallException - if args does not have exactly one argument

evaluate

public static Boolean evaluate(Object obj,
               Navigator nav)

Returns Boolean.TRUE if the boolean value of obj is false, and Boolean.FALSE otherwise. The boolean value is calculated as if by the XPath boolean function.

Parameters:

obj - the object whose boolean value is inverted

nav - the Navigator used to calculate the boolean value of obj

Returns:

Boolean.TRUE if the boolean value of obj is false, and Boolean.FALSE otherwise