Package org.apache.commons.jxpath

Class FunctionLibrary

java.lang.Object

org.apache.commons.jxpath.FunctionLibrary

All Implemented Interfaces:

Functions

public class FunctionLibrary
extends Object
implements Functions

An object that aggregates Functions objects into a group Functions object. Since JXPathContext can only register a single Functions object, FunctionLibrary should always be used to group all Functions objects that need to be registered.

Version:

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

Field Summary

Fields

Modifier and Type	Field	Description
private List	allFunctions
private HashMap	byNamespace

Constructor Summary

Constructors

Constructor	Description
FunctionLibrary()

Method Summary

Modifier and Type	Method	Description
void	addFunctions(Functions functions)	Add functions to the library
Function	getFunction(String namespace, String name, Object[] parameters)	Returns a Function, if any, for the specified namespace, name and parameter types.
Set	getUsedNamespaces()	Returns a set containing all namespaces used by the aggregated Functions.
private void	prepareCache()	Prepare the cache.
void	removeFunctions(Functions functions)	Remove functions from the library.

Methods inherited from class java.lang.Object

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

Field Details

allFunctions

private List allFunctions

byNamespace

private HashMap byNamespace

Constructor Details

FunctionLibrary

public FunctionLibrary()

Method Details

addFunctions

public void addFunctions(Functions functions)

Add functions to the library

Parameters:

functions - to add

removeFunctions

public void removeFunctions(Functions functions)

Remove functions from the library.

Parameters:

functions - to remove

getUsedNamespaces

public Set getUsedNamespaces()

Returns a set containing all namespaces used by the aggregated Functions.

Specified by:

getUsedNamespaces in interface Functions

Returns:

Set

getFunction

public Function getFunction(String namespace,
 String name,
 Object[] parameters)

Returns a Function, if any, for the specified namespace, name and parameter types.

Specified by:

getFunction in interface Functions

Parameters:

namespace - function namespace

name - function name

parameters - parameters

Returns:

Function found

prepareCache

private void prepareCache()

Prepare the cache.