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1   ////////////////////////////////////////////////////////////////////////////////
2   // checkstyle: Checks Java source code for adherence to a set of rules.
3   // Copyright (C) 2001-2017 the original author or authors.
4   //
5   // This library is free software; you can redistribute it and/or
6   // modify it under the terms of the GNU Lesser General Public
7   // License as published by the Free Software Foundation; either
8   // version 2.1 of the License, or (at your option) any later version.
9   //
10  // This library is distributed in the hope that it will be useful,
11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  // Lesser General Public License for more details.
14  //
15  // You should have received a copy of the GNU Lesser General Public
16  // License along with this library; if not, write to the Free Software
17  // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18  ////////////////////////////////////////////////////////////////////////////////
19  
20  package com.puppycrawl.tools.checkstyle.api;
21  
22  import java.util.EventListener;
23  
24  /**
25   * Listener in charge of receiving events from the Checker.
26   * Typical events sequence is:
27   * <pre>
28   * auditStarted
29   *   (fileStarted
30   *     (addError)*
31   *   fileFinished )*
32   * auditFinished
33   * </pre>
34   * @author <a href="mailto:stephane.bailliez@wanadoo.fr">Stephane Bailliez</a>
35   */
36  public interface AuditListener
37      extends EventListener {
38      /**
39       * Notify that the audit is about to start.
40       * @param event the event details
41       */
42      void auditStarted(AuditEvent event);
43  
44      /**
45       * Notify that the audit is finished.
46       * @param event the event details
47       */
48      void auditFinished(AuditEvent event);
49  
50      /**
51       * Notify that audit is about to start on a specific file.
52       * @param event the event details
53       */
54      void fileStarted(AuditEvent event);
55  
56      /**
57       * Notify that audit is finished on a specific file.
58       * @param event the event details
59       */
60      void fileFinished(AuditEvent event);
61  
62      /**
63       * Notify that an audit error was discovered on a specific file.
64       * @param event the event details
65       */
66      void addError(AuditEvent event);
67  
68      /**
69       * Notify that an exception happened while performing audit.
70       * @param event the event details
71       * @param throwable details of the exception
72       */
73      void addException(AuditEvent event, Throwable throwable);
74  }