1   /**
2    * Copyright (c) 2000-2008 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.util;
24  
25  import org.apache.commons.logging.Log;
26  import org.apache.commons.logging.LogFactory;
27  
28  import org.dom4j.io.SAXReader;
29  
30  /**
31   * <a href="SAXReaderFactory.java.html"><b><i>View Source</i></b></a>
32   *
33   * @author Brian Wing Shun Chan
34   *
35   */
36  public class SAXReaderFactory {
37  
38      public static SAXReader getInstance() {
39          return getInstance(true);
40      }
41  
42      public static SAXReader getInstance(boolean validate) {
43  
44          // Crimson cannot do XSD validation. See the following links:
45          //
46          // http://www.geocities.com/herong_yang/jdk/xsd_validation.html
47          // http://www.burnthacker.com/archives/000086.html
48          // http://www.theserverside.com/news/thread.tss?thread_id=22525
49  
50          SAXReader reader = null;
51  
52          try {
53              reader = new SAXReader(_SAX_PARSER_IMPL, validate);
54  
55              reader.setEntityResolver(new EntityResolver());
56  
57              reader.setFeature(_FEATURES_VALIDATION, validate);
58              reader.setFeature(_FEATURES_VALIDATION_SCHEMA, validate);
59              reader.setFeature(
60                  _FEATURES_VALIDATION_SCHEMA_FULL_CHECKING, validate);
61              reader.setFeature(_FEATURES_DYNAMIC, validate);
62          }
63          catch (Exception e) {
64              _log.warn("XSD validation is diasabled because " + e.getMessage());
65  
66              reader = new SAXReader(validate);
67  
68              reader.setEntityResolver(new EntityResolver());
69          }
70  
71          return reader;
72      }
73  
74      private static final String _SAX_PARSER_IMPL =
75          "org.apache.xerces.parsers.SAXParser";
76  
77      private static final String _FEATURES_VALIDATION =
78          "http://xml.org/sax/features/validation";
79  
80      private static final String _FEATURES_VALIDATION_SCHEMA =
81          "http://apache.org/xml/features/validation/schema";
82  
83      private static final String _FEATURES_VALIDATION_SCHEMA_FULL_CHECKING =
84          "http://apache.org/xml/features/validation/schema-full-checking";
85  
86      private static final String _FEATURES_DYNAMIC =
87          "http://apache.org/xml/features/validation/dynamic";
88  
89      private static Log _log = LogFactory.getLog(SAXReaderFactory.class);
90  
91  }