/*
 * 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 Remove implements TagPlugin {
    
    public void doTag(TagPluginContext ctxt) {
        
        //scope flag
        boolean hasScope = ctxt.isAttributeSpecified("scope");
        
        //the value of the "var"
        String strVar = ctxt.getConstantAttribute("var");
        
        //remove attribute from certain scope.
        //default scope is "page".
        if(hasScope){
            int iScope = Util.getScope(ctxt.getConstantAttribute("scope"));
            ctxt.generateJavaSource("pageContext.removeAttribute(\"" + strVar + "\"," + iScope + ");");
        }else{
            ctxt.generateJavaSource("pageContext.removeAttribute(\"" + strVar + "\");");
        }
    }
    
}
