/* | |
* 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.struts2.jasper.tagplugins.jstl.core; | |
import org.apache.struts2.jasper.compiler.tagplugin.TagPlugin; | |
import org.apache.struts2.jasper.compiler.tagplugin.TagPluginContext; | |
public final class When implements TagPlugin { | |
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> | |
} | |
} |