CountFunction (jaxen 1.2.0 API)

java.lang.Object
- org.jaxen.function.CountFunction

All Implemented Interfaces:

Function
```
public class CountFunction
extends Object
implements Function
```
4.1 number count(node-set)

The count function returns the number of nodes in the argument node-set.

Author:

bob mcwhirter (bob @ werken.com)

See Also:

Section 4.1 of the XPath Specification

Constructor Summary

Constructors
Constructor Description

CountFunction()
Create a new CountFunction object.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Object`	`call(Context context, List args)`	Returns the number of nodes in the specified node-set.
`static Double`	`evaluate(Object obj)`	Returns the number of nodes in the specified node-set.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - CountFunction
```
public CountFunction()
```
    Create a new CountFunction object.
- Method Detail
  - call
```
public Object call(Context context,
                   List args)
            throws FunctionCallException
```
    Returns the number of nodes in the specified node-set.
    
    Specified by:
    
    call in interface Function
    
    Parameters:
    
    context - ignored
    
    args - the function arguments
    
    Returns:
    
    a Double giving the integral number of items in the first argument
    
    Throws:
    
    FunctionCallException - if args does not have exactly one item; or that item is not a List
  - evaluate
```
public static Double evaluate(Object obj)
                       throws FunctionCallException
```
    Returns the number of nodes in the specified node-set.
    
    Parameters:
    
    obj - a List of nodes
    
    Returns:
    
    the integral number of items in the list
    
    Throws:
    
    FunctionCallException - if obj is not a List