NotFunction (jaxen 1.2.0 API)

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 Description

NotFunction()
Create a new NotFunction object.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	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