/* | |
* 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; | |
import org.apache.struts2.jasper.tagplugins.jstl.Util; | |
public class Url implements TagPlugin { | |
public void doTag(TagPluginContext ctxt) { | |
//flags | |
boolean hasVar, hasContext, hasScope; | |
//init flags | |
hasVar = ctxt.isAttributeSpecified("var"); | |
hasContext = ctxt.isAttributeSpecified("context"); | |
hasScope = ctxt.isAttributeSpecified("scope"); | |
//define name of the temp variables | |
String valueName = ctxt.getTemporaryVariableName(); | |
String contextName = ctxt.getTemporaryVariableName(); | |
String baseUrlName = ctxt.getTemporaryVariableName(); | |
String resultName = ctxt.getTemporaryVariableName(); | |
String responseName = ctxt.getTemporaryVariableName(); | |
//get the scope | |
String strScope = "page"; | |
if(hasScope){ | |
strScope = ctxt.getConstantAttribute("scope"); | |
} | |
int iScope = Util.getScope(strScope); | |
//get the value | |
ctxt.generateJavaSource("String " + valueName + " = "); | |
ctxt.generateAttribute("value"); | |
ctxt.generateJavaSource(";"); | |
//get the context | |
ctxt.generateJavaSource("String " + contextName + " = null;"); | |
if(hasContext){ | |
ctxt.generateJavaSource(contextName + " = "); | |
ctxt.generateAttribute("context"); | |
ctxt.generateJavaSource(";"); | |
} | |
//get the raw url | |
ctxt.generateJavaSource("String " + baseUrlName + " = " + | |
"org.apache.struts2.jasper.tagplugins.jstl.Util.resolveUrl(" + valueName + ", " + contextName + ", pageContext);"); | |
ctxt.generateJavaSource("pageContext.setAttribute" + | |
"(\"url_without_param\", " + baseUrlName + ");"); | |
//add params | |
ctxt.generateBody(); | |
ctxt.generateJavaSource("String " + resultName + " = " + | |
"(String)pageContext.getAttribute(\"url_without_param\");"); | |
ctxt.generateJavaSource("pageContext.removeAttribute(\"url_without_param\");"); | |
//if the url is relative, encode it | |
ctxt.generateJavaSource("if(!org.apache.struts2.jasper.tagplugins.jstl.Util.isAbsoluteUrl(" + resultName + ")){"); | |
ctxt.generateJavaSource(" HttpServletResponse " + responseName + " = " + | |
"((HttpServletResponse) pageContext.getResponse());"); | |
ctxt.generateJavaSource(" " + resultName + " = " | |
+ responseName + ".encodeURL(" + resultName + ");"); | |
ctxt.generateJavaSource("}"); | |
//if "var" is specified, the url string store in the attribute var defines | |
if(hasVar){ | |
String strVar = ctxt.getConstantAttribute("var"); | |
ctxt.generateJavaSource("pageContext.setAttribute" + | |
"(\"" + strVar + "\", " + resultName + ", " + iScope + ");"); | |
//if var is not specified, just print out the url string | |
}else{ | |
ctxt.generateJavaSource("try{"); | |
ctxt.generateJavaSource(" pageContext.getOut().print(" + resultName + ");"); | |
ctxt.generateJavaSource("}catch(java.io.IOException ex){"); | |
ctxt.generateJavaSource(" throw new JspTagException(ex.toString(), ex);"); | |
ctxt.generateJavaSource("}"); | |
} | |
} | |
} |