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annotate src/org/tmatesoft/hg/core/HgInvalidFileException.java @ 396:0ae53c32ecef

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Straighten out exceptions thrown when file access failed - three is too much
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 23 Feb 2012 01:06:24 +0100
parents f52ca9530774
children 2747b0723867
rev   line source
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1 /*
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2 * Copyright (c) 2011-2012 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.core;
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18
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19 import java.io.File;
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20 import java.io.IOException;
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21
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22 /**
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23 * Thrown when there are troubles working with local file. Most likely (but not necessarily) wraps IOException. Might be
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24 * perceived as specialized IOException with optional File and other repository information.
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25 *
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26 * <b>Hg4J</b> tries to minimize chances for IOException to occur (i.e. {@link File#canRead()} is checked before attempt to
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27 * read a file that might not exist, and doesn't use this exception to wrap each and any {@link IOException} source (e.g.
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28 * <code>#close()</code> calls are unlikely to yield it), hence it is likely to address real cases when I/O error occurs.
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29 *
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30 * On the other hand, when a file is supposed to exist and be readable, this exception might get thrown as well to indicate
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31 * that's not true.
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32 *
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33 * @author Artem Tikhomirov
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34 * @author TMate Software Ltd.
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35 */
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36 @SuppressWarnings("serial")
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37 public class HgInvalidFileException extends HgException {
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38
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39 private File localFile;
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40
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41 public HgInvalidFileException(String message, Throwable th) {
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42 super(message, th);
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43 }
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44
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45 public HgInvalidFileException(String message, Throwable th, File file) {
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46 super(message, th);
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47 localFile = file; // allows null
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48 }
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49
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50 public HgInvalidFileException setFile(File file) {
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51 assert file != null; // doesn't allow null not to clear file accidentally
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52 localFile = file;
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53 return this;
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54 }
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55
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56 /**
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57 * @return file object that causes troubles, or <code>null</code> if specific file is unknown
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58 */
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59 public File getFile() {
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60 return localFile;
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61 }
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63 @Override
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64 protected void appendDetails(StringBuilder sb) {
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65 super.appendDetails(sb);
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66 if (localFile != null) {
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67 sb.append(';');
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68 sb.append(' ');
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69 sb.append(" file:");
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70 sb.append(localFile.getPath());
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71 sb.append(',');
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72 if (localFile.exists()) {
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73 sb.append("EXISTS");
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74 } else {
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75 sb.append("DOESN'T EXIST");
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76 }
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77 }
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78 }
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79 }