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 package examples; 018 019 import javax.servlet.jsp.*; 020 import java.io.IOException; 021 022 /** 023 * Example1: the simplest tag 024 * Collect attributes and call into some actions 025 * 026 * <foo att1="..." att2="...." att3="...." /> 027 */ 028 029 public class FooTag 030 extends ExampleTagBase 031 { 032 private String atts[] = new String[3]; 033 int i = 0; 034 035 private final void setAtt(int index, String value) { 036 atts[index] = value; 037 } 038 039 public void setAtt1(String value) { 040 setAtt(0, value); 041 } 042 043 public void setAtt2(String value) { 044 setAtt(1, value); 045 } 046 047 public void setAtt3(String value) { 048 setAtt(2, value); 049 } 050 051 /** 052 * Process start tag 053 * 054 * @return EVAL_BODY_INCLUDE 055 */ 056 public int doStartTag() throws JspException { 057 i = 0; 058 return EVAL_BODY_TAG; 059 } 060 061 public void doInitBody() throws JspException { 062 pageContext.setAttribute("member", atts[i]); 063 i++; 064 } 065 066 public int doAfterBody() throws JspException { 067 try { 068 if (i == 3) { 069 bodyOut.writeOut(bodyOut.getEnclosingWriter()); 070 return SKIP_BODY; 071 } else 072 pageContext.setAttribute("member", atts[i]); 073 i++; 074 return EVAL_BODY_TAG; 075 } catch (IOException ex) { 076 throw new JspTagException(ex.toString()); 077 } 078 } 079 } 080