1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 19 package org.apache.struts2.jasper.tagplugins.jstl.core; 20 21 import org.apache.struts2.jasper.compiler.tagplugin.TagPlugin; 22 import org.apache.struts2.jasper.compiler.tagplugin.TagPluginContext; 23 import org.apache.struts2.jasper.tagplugins.jstl.Util; 24 25 public class Remove implements TagPlugin { 26 27 public void doTag(TagPluginContext ctxt) { 28 29 //scope flag 30 boolean hasScope = ctxt.isAttributeSpecified("scope"); 31 32 //the value of the "var" 33 String strVar = ctxt.getConstantAttribute("var"); 34 35 //remove attribute from certain scope. 36 //default scope is "page". 37 if (hasScope) { 38 int iScope = Util.getScope(ctxt.getConstantAttribute("scope")); 39 ctxt.generateJavaSource("pageContext.removeAttribute(\"" + strVar + "\"," + iScope + ");"); 40 } else { 41 ctxt.generateJavaSource("pageContext.removeAttribute(\"" + strVar + "\");"); 42 } 43 } 44 45 }