| career | drupal | java | mac | mysql | perl | scala | uml | unix  

What this is

This file is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Other links

The source code

 *  Copyright 1999-2004 The Apache Software Foundation
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.

package org.apache.jasper.compiler;

import java.util.Hashtable;

import javax.servlet.jsp.tagext.TagLibraryInfo;

import org.apache.jasper.Constants;
import org.apache.jasper.JasperException;

 * A container for all tag libraries that have been imported using
 * the taglib directive. 
 * @author Anil K. Vijendran
 * @author Mandar Raje
public class TagLibraries {
    public TagLibraries(ClassLoader cl) {
        this.tagLibInfos = new Hashtable();
	this.tagCaches = new Hashtable(); = cl;
    public void addTagLibrary(String prefix, TagLibraryInfo tli) {
        tagLibInfos.put(prefix, tli);
    public boolean isUserDefinedTag(String prefix, String shortTagName) 
        throws JasperException
        TagLibraryInfo tli = (TagLibraryInfo) tagLibInfos.get(prefix);
        if (tli == null)
            return false;
        else if (tli.getTag(shortTagName) != null)
            return true;
        throw new JasperException(Constants.getString("jsp.error.bad_tag",
                                                      new Object[] {
    public TagLibraryInfo getTagLibInfo(String prefix) {
        return (TagLibraryInfo) tagLibInfos.get(prefix);

    public TagCache getTagCache(String prefix, String shortTagName) {
	return (TagCache) tagCaches.get(new TagID(prefix, shortTagName));

    public void putTagCache(String prefix, String shortTagName, TagCache tc) {
	tagCaches.put(new TagID(prefix, shortTagName), tc);

    private Hashtable tagLibInfos;
    private Hashtable tagCaches;
    private ClassLoader cl;

    private static class TagID {

	private String prefix;
	private String shortTagName;

	public TagID(String prefix, String shortTagName) {
	    this.prefix = prefix;
	    this.shortTagName = shortTagName;

	public boolean equals(Object obj) {
	    return (prefix.equals(((TagID)obj).prefix)) &&

	public int hashCode() {
	    return prefix.hashCode() + shortTagName.hashCode();

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller


new blog posts


Copyright 1998-2021 Alvin Alexander,
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.