/*
* 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 {
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>
}
}