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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  package org.apache.struts2.jasper.runtime;
19  
20  import javax.servlet.jsp.JspContext;
21  import javax.servlet.jsp.PageContext;
22  import javax.servlet.jsp.tagext.JspFragment;
23  import javax.servlet.jsp.tagext.JspTag;
24  
25  /***
26   * Helper class from which all Jsp Fragment helper classes extend.
27   * This class allows for the emulation of numerous fragments within
28   * a single class, which in turn reduces the load on the class loader
29   * since there are potentially many JspFragments in a single page.
30   * <p/>
31   * The class also provides various utility methods for JspFragment
32   * implementations.
33   *
34   * @author Mark Roth
35   */
36  public abstract class JspFragmentHelper
37          extends JspFragment {
38  
39      protected int discriminator;
40      protected JspContext jspContext;
41      protected PageContext _jspx_page_context;
42      protected JspTag parentTag;
43  
44      public JspFragmentHelper(int discriminator, JspContext jspContext,
45                               JspTag parentTag) {
46          this.discriminator = discriminator;
47          this.jspContext = jspContext;
48          this._jspx_page_context = null;
49          if (jspContext instanceof PageContext) {
50              _jspx_page_context = (PageContext) jspContext;
51          }
52          this.parentTag = parentTag;
53      }
54  
55      public JspContext getJspContext() {
56          return this.jspContext;
57      }
58  
59      public JspTag getParentTag() {
60          return this.parentTag;
61      }
62  
63  }