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 }