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    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   }

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