001    /*
002    * Copyright 2004 The Apache Software Foundation
003    *
004    * Licensed under the Apache License, Version 2.0 (the "License");
005    * you may not use this file except in compliance with the License.
006    * You may obtain a copy of the License at
007    *
008    *     http://www.apache.org/licenses/LICENSE-2.0
009    *
010    * Unless required by applicable law or agreed to in writing, software
011    * distributed under the License is distributed on an "AS IS" BASIS,
012    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013    * See the License for the specific language governing permissions and
014    * limitations under the License.
015    */
016    
017    
018    package jsp2.examples.simpletag;
019    
020    import javax.servlet.jsp.JspException;
021    import javax.servlet.jsp.JspWriter;
022    import javax.servlet.jsp.tagext.SimpleTagSupport;
023    import javax.servlet.jsp.tagext.DynamicAttributes;
024    import java.util.ArrayList;
025    import java.util.Iterator;
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    }