/* | |
* 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 Out implements TagPlugin { | |
public void doTag(TagPluginContext ctxt) { | |
//these two data member are to indicate | |
//whether the corresponding attribute is specified | |
boolean hasDefault=false, hasEscapeXml=false; | |
hasDefault = ctxt.isAttributeSpecified("default"); | |
hasEscapeXml = ctxt.isAttributeSpecified("escapeXml"); | |
//strValName, strEscapeXmlName & strDefName are two variables' name | |
//standing for value, escapeXml and default attribute | |
String strValName = ctxt.getTemporaryVariableName(); | |
String strDefName = ctxt.getTemporaryVariableName(); | |
String strEscapeXmlName = ctxt.getTemporaryVariableName(); | |
//according to the tag file, the value attribute is mandatory. | |
ctxt.generateJavaSource("String " + strValName + " = null;"); | |
ctxt.generateJavaSource("if("); | |
ctxt.generateAttribute("value"); | |
ctxt.generateJavaSource("!=null){"); | |
ctxt.generateJavaSource(" " + strValName + " = ("); | |
ctxt.generateAttribute("value"); | |
ctxt.generateJavaSource(").toString();"); | |
ctxt.generateJavaSource("}"); | |
//initiate the strDefName with null. | |
//if the default has been specified, then assign the value to it; | |
ctxt.generateJavaSource("String " + strDefName + " = null;\n"); | |
if(hasDefault){ | |
ctxt.generateJavaSource("if("); | |
ctxt.generateAttribute("default"); | |
ctxt.generateJavaSource(" != null){"); | |
ctxt.generateJavaSource(strDefName + " = ("); | |
ctxt.generateAttribute("default"); | |
ctxt.generateJavaSource(").toString();"); | |
ctxt.generateJavaSource("}"); | |
} | |
//initiate the strEscapeXmlName with true; | |
//if the escapeXml is specified, assign the value to it; | |
ctxt.generateJavaSource("boolean " + strEscapeXmlName + " = true;"); | |
if(hasEscapeXml){ | |
ctxt.generateJavaSource(strEscapeXmlName + " = Boolean.parseBoolean(("); | |
ctxt.generateAttribute("default"); | |
ctxt.generateJavaSource(").toString());"); | |
} | |
//main part. | |
ctxt.generateJavaSource("if(null != " + strValName +"){"); | |
ctxt.generateJavaSource(" if(" + strEscapeXmlName + "){"); | |
ctxt.generateJavaSource(" " + strValName + " = org.apache.struts2.jasper.tagplugins.jstl.Util.escapeXml(" + strValName + ");"); | |
ctxt.generateJavaSource(" }"); | |
ctxt.generateJavaSource(" out.write(" + strValName + ");"); | |
ctxt.generateJavaSource("}else{"); | |
ctxt.generateJavaSource(" if(null != " + strDefName + "){"); | |
ctxt.generateJavaSource(" if(" + strEscapeXmlName + "){"); | |
ctxt.generateJavaSource(" " + strDefName + " = org.apache.struts2.jasper.tagplugins.jstl.Util.escapeXml(" + strDefName + ");"); | |
ctxt.generateJavaSource(" }"); | |
ctxt.generateJavaSource(" out.write(" + strDefName + ");"); | |
ctxt.generateJavaSource(" }else{"); | |
ctxt.generateBody(); | |
ctxt.generateJavaSource(" }"); | |
ctxt.generateJavaSource("}"); | |
} | |
} |