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annotate cmdline/org/tmatesoft/hg/console/Options.java @ 256:b61ed0f2c4da

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Yet another slight perf/mem improvement for the tags per file sample
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 16 Aug 2011 15:45:47 +0200
parents b9700740553a
children 45dc79e545f5
rev   line source
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1 /*
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2 * Copyright (c) 2011 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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a3a2e5deb320 Updated contact address to support@hg4j.com
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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.console;
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19 import java.util.HashMap;
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20 import java.util.LinkedList;
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21 import java.util.List;
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22 import java.util.Map;
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23
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24 import org.tmatesoft.hg.repo.HgLookup;
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25 import org.tmatesoft.hg.repo.HgRepository;
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26
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27 /**
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28 * Parse command-line options. Primitive implementation that recognizes options with 0 or 1 argument.
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29 *
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30 * @author Artem Tikhomirov
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31 * @author TMate Software Ltd.
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32 */
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33 class Options {
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34
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35 public final Map<String,List<String>> opt2values = new HashMap<String, List<String>>();
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36
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37 public boolean getBoolean(String... aliases) {
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38 return getBoolean(false, aliases);
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39 }
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40
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41 public boolean getBoolean(boolean def, String... aliases) {
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42 for (String s : aliases) {
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43 if (opt2values.containsKey(s)) {
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44 return true;
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45 }
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46 }
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47 return def;
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48 }
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49
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50 public String getSingle(String... aliases) {
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51 String rv = null;
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52 for (String s : aliases) {
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53 List<String> values = opt2values.get(s);
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54 if (values != null && values.size() > 0) {
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55 rv = values.get(values.size() - 1); // take last one, most recent
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56 }
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57 }
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58 return rv;
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59 }
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60
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61 public int getSingleInt(int def, String... aliases) {
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62 String r = getSingle(aliases);
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63 if (r == null) {
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64 return def;
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65 }
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66 return Integer.parseInt(r);
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67 }
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69 public List<String> getList(String... aliases) {
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70 LinkedList<String> rv = new LinkedList<String>();
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71 for (String s : aliases) {
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72 List<String> values = opt2values.get(s);
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73 if (values != null) {
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74 rv.addAll(values);
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75 }
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76 }
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77 return rv;
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78 }
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80 public HgRepository findRepository() throws Exception {
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81 String repoLocation = getSingle("-R", "--repository");
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82 if (repoLocation != null) {
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83 return new HgLookup().detect(repoLocation);
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84 }
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85 return new HgLookup().detectFromWorkingDir();
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86 }
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89 public static Options parse(String[] commandLineArgs) {
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90 Options rv = new Options();
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91 List<String> values = new LinkedList<String>();
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92 rv.opt2values.put("", values); // values with no options
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93 for (String arg : commandLineArgs) {
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94 if (arg.charAt(0) == '-') {
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95 // option
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96 if (arg.length() == 1) {
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97 throw new IllegalArgumentException("Bad option: -");
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98 }
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99 values = rv.opt2values.get(arg);
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100 if (values == null) {
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101 rv.opt2values.put(arg, values = new LinkedList<String>());
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102 }
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103 // next value, if any, gets into the values list for arg option.
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104 } else {
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105 values.add(arg);
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106 values = rv.opt2values.get("");
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107 }
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108 }
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109 return rv;
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110 }
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111 }