NamespaceUriFunction (jaxen 1.2.0 API)

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

All Implemented Interfaces:

Function
```
public class NamespaceUriFunction
extends Object
implements Function
```
4.1 string namespace-uri(node-set?)

The namespace-uri function returns the namespace URI of the expanded-name of the node in the argument node-set that is first in document order. If the argument node-set is empty, the first node has no expanded-name, or the namespace URI of the expanded-name is null, an empty string is returned. If the argument is omitted, it defaults to a node-set with the context node as its only member.

NOTE: The string returned by the namespace-uri function will be empty except for element nodes and attribute nodes.

Author:

bob mcwhirter (bob @ werken.com)

See Also:

Section 4.1 of the XPath Specification

Constructor Summary

Constructors
Constructor Description

NamespaceUriFunction()
Create a new NamespaceUriFunction object.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Object`	`call(Context context, List args)`	Returns the namespace URI of the specified node or the namespace URI of the context node if no arguments are provided.
`static String`	`evaluate(List list, Navigator nav)`	Returns the namespace URI of `list.get(0)`

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

- Constructor Detail
  - NamespaceUriFunction
```
public NamespaceUriFunction()
```
    Create a new NamespaceUriFunction object.
- Method Detail
  - call
```
public Object call(Context context,
                   List args)
            throws FunctionCallException
```
    Returns the namespace URI of the specified node or the namespace URI of the context node if no arguments are provided.
    
    Specified by:
    
    call in interface Function
    
    Parameters:
    
    context - the context at the point in the expression where the function is called
    
    args - a List containing zero or one items
    
    Returns:
    
    a String containing the namespace URI
    
    Throws:
    
    FunctionCallException - if args has more than one item
  - evaluate
```
public static String evaluate(List list,
                              Navigator nav)
                       throws FunctionCallException
```
    Returns the namespace URI of list.get(0)
    
    Parameters:
    
    list - a list of nodes
    
    nav - the Navigator used to retrieve the namespace
    
    Returns:
    
    the namespace URI of list.get(0)
    
    Throws:
    
    FunctionCallException - if list.get(0) is not a node