UnparsedEntityFun


1   /*
2    * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3    *
4    * This file is part of Resin(R) Open Source
5    *
6    * Each copy or derived work must preserve the copyright notice and this
7    * notice unmodified.
8    *
9    * Resin Open Source is free software; you can redistribute it and/or modify
10   * it under the terms of the GNU General Public License as published by
11   * the Free Software Foundation; either version 2 of the License, or
12   * (at your option) any later version.
13   *
14   * Resin Open Source is distributed in the hope that it will be useful,
15   * but WITHOUT ANY WARRANTY; without even the implied warranty of
16   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17   * of NON-INFRINGEMENT.  See the GNU General Public License for more
18   * details.
19   *
20   * You should have received a copy of the GNU General Public License
21   * along with Resin Open Source; if not, write to the
22   *   Free SoftwareFoundation, Inc.
23   *   59 Temple Place, Suite 330
24   *   Boston, MA 02111-1307  USA
25   *
26   * @author Scott Ferguson
27   */
28  
29  package com.caucho.xsl.fun;
30  
31  import com.caucho.xpath.Expr;
32  import com.caucho.xpath.ExprEnvironment;
33  import com.caucho.xpath.XPathException;
34  import com.caucho.xpath.XPathFun;
35  import com.caucho.xpath.pattern.AbstractPattern;
36  
37  import org.w3c.dom.Document  ;
38  import org.w3c.dom.DocumentType  ;
39  import org.w3c.dom.Entity  ;
40  import org.w3c.dom.NamedNodeMap  ;
41  import org.w3c.dom.Node  ;
42  
43  import java.util.ArrayList  ;
44  
45  /**
46   * The unparsed-entity(...) function.
47   */
48  public class UnparsedEntityFun extends XPathFun {
49    /**
50     * Evaluate the function.
51     *
52     * @param pattern The context pattern.
53     * @param args The evaluated arguments
54     */
55    public Object   eval(Node   node, ExprEnvironment env,
56               AbstractPattern pattern, ArrayList   args)
57      throws XPathException
58    {
59      if (args.size() < 1)
60        return "";
61  
62      String   name = Expr.toString(args.get(0));
63      Document   doc = node.getOwnerDocument();
64      DocumentType   dtd = doc.getDoctype();
65      NamedNodeMap   map = dtd.getEntities();
66      Entity   entity = (Entity  ) map.getNamedItem(name);
67      
68      if (entity == null)
69        return "";
70      else if (entity.getSystemId() != null && ! entity.getSystemId().equals(""))
71        return entity.getSystemId();
72      else
73        return entity.getPublicId();
74    }
75  }
76
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