| /* |
| * 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.jasper.tagplugins.jstl.core; |
| |
| import org.apache.jasper.compiler.tagplugin.TagPlugin; |
| import org.apache.jasper.compiler.tagplugin.TagPluginContext; |
| |
| public final class When implements TagPlugin { |
| |
| @Override |
| public void doTag(TagPluginContext ctxt) { |
| // Get the parent context to determine if this is the first <c:when> |
| TagPluginContext parentContext = ctxt.getParentContext(); |
| if (parentContext == null) { |
| ctxt.dontUseTagPlugin(); |
| return; |
| } |
| |
| if ("true".equals(parentContext.getPluginAttribute("hasBeenHere"))) { |
| ctxt.generateJavaSource("} else if("); |
| // See comment below for the reason we generate the extra "}" here. |
| } |
| else { |
| ctxt.generateJavaSource("if("); |
| parentContext.setPluginAttribute("hasBeenHere", "true"); |
| } |
| ctxt.generateAttribute("test"); |
| ctxt.generateJavaSource("){"); |
| ctxt.generateBody(); |
| |
| // We don't generate the closing "}" for the "if" here because there |
| // may be whitespaces in between <c:when>'s. Instead we delay |
| // generating it until the next <c:when> or <c:otherwise> or |
| // <c:choose> |
| } |
| } |