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1   /*
2    * #%L
3    * JavaHg
4    * %%
5    * Copyright (C) 2011 aragost Trifork ag
6    * %%
7    * Permission is hereby granted, free of charge, to any person obtaining a copy
8    * of this software and associated documentation files (the "Software"), to deal
9    * in the Software without restriction, including without limitation the rights
10   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11   * copies of the Software, and to permit persons to whom the Software is
12   * furnished to do so, subject to the following conditions:
13   * 
14   * The above copyright notice and this permission notice shall be included in
15   * all copies or substantial portions of the Software.
16   * 
17   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23   * THE SOFTWARE.
24   * #L%
25   */
26  package com.aragost.javahg.commands;
27  
28  import com.aragost.javahg.internals.AbstractCommand;
29  import com.google.common.base.Strings;
30  
31  /**
32   * Generic exception thrown when executing a Mercurial command fails.
33   */
34  public class ExecutionException extends RuntimeException {
35  
36      private static final String ABORT_PREFIX = "abort: ";
37  
38      private static final long serialVersionUID = 1L;
39  
40      // TODO Exceptions are Serializable, AbstractCommand not. So we
41      // should not have it as a non-transient field.
42      private final AbstractCommand command;
43  
44      /**
45       * @param message
46       *            the exception message
47       * @param command
48       *            the command that failed.
49       */
50      public ExecutionException(AbstractCommand command, String message) {
51          super(message);
52          this.command = command;
53      }
54  
55      /**
56       * @param command
57       *            the command that failed.
58       */
59      public ExecutionException(AbstractCommand command) {
60          this(command, generateMessage(command));
61      }
62  
63      /**
64       * @return the command that failed.
65       */
66      public AbstractCommand getCommand() {
67          return command;
68      }
69  
70      /**
71       * Generate generic exception message based on the command.
72       * 
73       * @param cmd
74       * @return
75       */
76      private static String generateMessage(AbstractCommand cmd) {
77          String s = cmd.getErrorString().trim();
78          if (Strings.isNullOrEmpty(s)) {
79              s = "Error in command '" + cmd.getCommandName() + "' [rc: " + cmd.getReturnCode() + "]";
80          }
81          if (s.startsWith(ABORT_PREFIX)) {
82              s = s.substring(ABORT_PREFIX.length());
83          }
84          return s;
85      }
86  
87  }