/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * 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.xerces.util;

import java.util.Map;

import com.sun.javadoc.Tag;
import com.sun.tools.doclets.Taglet;

/**
 * This class provides support for a 'xerces.internal' tag
 * in javadoc comments. The tag creates a warning in the generated
 * html for users.
 * 
 * @author Ankit Pasricha, IBM
 */
public class InternalTaglet implements Taglet {
    
    private static final String NAME = "xerces.internal";
    private static final String HEADER = "INTERNAL:";
    /* (non-Javadoc)
     * @see com.sun.tools.doclets.Taglet#inConstructor()
     */
    public boolean inConstructor() {
        return false;
    }
    
    /* (non-Javadoc)
     * @see com.sun.tools.doclets.Taglet#inField()
     */
    public boolean inField() {
        return false;
    }
    
    /* (non-Javadoc)
     * @see com.sun.tools.doclets.Taglet#inMethod()
     */
    public boolean inMethod() {
        return true;
    }
    
    /* (non-Javadoc)
     * @see com.sun.tools.doclets.Taglet#inOverview()
     */
    public boolean inOverview() {
        return true;
    }
    
    /* (non-Javadoc)
     * @see com.sun.tools.doclets.Taglet#inPackage()
     */
    public boolean inPackage() {
        return false;
    }
    
    /* (non-Javadoc)
     * @see com.sun.tools.doclets.Taglet#inType()
     */
    public boolean inType() {
        return true;
    }
    
    /* (non-Javadoc)
     * @see com.sun.tools.doclets.Taglet#isInlineTag()
     */
    public boolean isInlineTag() {
        return false;
    }
    
    /* (non-Javadoc)
     * @see com.sun.tools.doclets.Taglet#getName()
     */
    public String getName() {
        return NAME;
    }
    
    /* (non-Javadoc)
     * @see com.sun.tools.doclets.Taglet#toString(com.sun.javadoc.Tag)
     */
    public String toString(Tag arg0) {
        return "<DT><H1 style=\"font-size:110%\">" + HEADER + "</H1><DD>"
        + "Usage of this class is not supported. It may be altered or removed at any time.<br/>"
        + "<I>" + arg0.text() + "</I></DD>\n";
    }
    
    /* (non-Javadoc)
     * @see com.sun.tools.doclets.Taglet#toString(com.sun.javadoc.Tag[])
     */
    public String toString(Tag[] tags) {
        if (tags.length == 0) {
            return null;
        }
        String result = "\n<DT><H1 style=\"font-size:110%\">" + HEADER + "</H1><DD>";
        result += "Usage of this class is not supported. It may be altered or removed at any time.";
        result += "<I>";
        for (int i = 0; i < tags.length; i++) {
            result += "<br/>";
            result += tags[i].text();
        }
        return result + "</I></DD>\n";
    }
    
    /**
     * Register this Taglet.
     * @param tagletMap  the map to register this tag to.
     */
    public static void register(Map tagletMap) {
        InternalTaglet tag = new InternalTaglet();
        Taglet t = (Taglet) tagletMap.get(tag.getName());
        if (t != null) {
            tagletMap.remove(tag.getName());
        }
        tagletMap.put(tag.getName(), tag);
    }
    
}