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1   /*
2    *
3    *   Copyright 2005 The Apache Software Foundation.
4    *
5    *  Licensed under the Apache License, Version 2.0 (the "License");
6    *  you may not use this file except in compliance with the License.
7    *  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.commons.scxml.env;
19  
20  import org.apache.commons.logging.Log;
21  import org.apache.commons.logging.LogFactory;
22  
23  import org.xml.sax.ErrorHandler;
24  import org.xml.sax.SAXParseException;
25  
26  /***
27   * Custom error handler that logs the parsing errors in the
28   * SCXML document.
29   */
30  public class SimpleErrorHandler implements ErrorHandler {
31  
32      /*** Message prefix. */
33      private static final String MSG_PREFIX = "SCXML SAX Parsing: ";
34      /*** Message postfix. */
35      private static final String MSG_POSTFIX = " Correct the SCXML document.";
36  
37      /*** Log. */
38      private Log log = LogFactory.getLog(getClass());
39  
40      /***
41       * Constructor.
42       */
43      public SimpleErrorHandler() {
44          super();
45      }
46  
47      /***
48       * @see ErrorHandler#error(SAXParseException)
49       */
50      public void error(final SAXParseException exception) {
51          if (log.isErrorEnabled()) {
52              log.error(MSG_PREFIX + exception.getMessage() + MSG_POSTFIX,
53                  exception);
54          }
55      }
56  
57      /***
58       * @see ErrorHandler#fatalError(SAXParseException)
59       */
60      public void fatalError(final SAXParseException exception) {
61          if (log.isFatalEnabled()) {
62              log.fatal(MSG_PREFIX + exception.getMessage() + MSG_POSTFIX,
63                  exception);
64          }
65      }
66  
67      /***
68       * @see ErrorHandler#warning(SAXParseException)
69       */
70      public void warning(final SAXParseException exception) {
71          if (log.isWarnEnabled()) {
72              log.warn(MSG_PREFIX + exception.getMessage() + MSG_POSTFIX,
73                  exception);
74          }
75      }
76  }
77