001    /*
002    * Licensed to the Apache Software Foundation (ASF) under one or more
003    * contributor license agreements.  See the NOTICE file distributed with
004    * this work for additional information regarding copyright ownership.
005    * The ASF licenses this file to You under the Apache License, Version 2.0
006    * (the "License"); you may not use this file except in compliance with
007    * the License.  You may obtain a copy of the License at
008    *
009    *     http://www.apache.org/licenses/LICENSE-2.0
010    *
011    * Unless required by applicable law or agreed to in writing, software
012    * distributed under the License is distributed on an "AS IS" BASIS,
013    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014    * See the License for the specific language governing permissions and
015    * limitations under the License.
016    */
017    
018    
019    package jsp2.examples.simpletag;
020    
021    import javax.servlet.jsp.JspException;
022    import javax.servlet.jsp.JspWriter;
023    import javax.servlet.jsp.tagext.SimpleTagSupport;
024    import javax.servlet.jsp.tagext.DynamicAttributes;
025    import java.util.ArrayList;
026    import java.io.IOException;
027    
028    /**
029     * SimpleTag handler that echoes all its attributes 
030     */
031    public class EchoAttributesTag 
032        extends SimpleTagSupport
033        implements DynamicAttributes
034    {
035        private ArrayList keys = new ArrayList();
036        private ArrayList values = new ArrayList();
037    
038        public void doTag() throws JspException, IOException {
039            JspWriter out = getJspContext().getOut();
040            for( int i = 0; i < keys.size(); i++ ) {
041                String key = (String)keys.get( i );
042                Object value = values.get( i );
043                out.println( "<li>" + key + " = " + value + "</li>" );
044            }
045        }
046    
047        public void setDynamicAttribute( String uri, String localName, 
048            Object value ) 
049            throws JspException
050        {
051            keys.add( localName );
052            values.add( value );
053        }
054    }