1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.command;
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3 |
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4 | import static org.openstreetmap.josm.tools.I18n.tr;
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5 |
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6 | import java.util.Arrays;
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7 | import java.util.Collection;
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8 | import java.util.HashSet;
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9 | import java.util.Objects;
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10 | import java.util.stream.Collectors;
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11 | import java.util.stream.Stream;
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12 |
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13 | import javax.swing.Icon;
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14 |
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15 | import org.openstreetmap.josm.data.osm.DataSet;
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16 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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17 | import org.openstreetmap.josm.tools.ImageProvider;
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18 | import org.openstreetmap.josm.tools.Utils;
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19 | import org.openstreetmap.josm.tools.bugreport.ReportedException;
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20 |
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21 | /**
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22 | * A command consisting of a sequence of other commands. Executes the other commands
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23 | * and undo them in reverse order.
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24 | * @author imi
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25 | * @since 31
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26 | */
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27 | public class SequenceCommand extends Command {
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28 |
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29 | /** The command sequence to be executed. */
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30 | private Command[] sequence;
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31 | private boolean sequenceComplete;
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32 | private final String name;
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33 | /** Determines if the sequence execution should continue after one of its commands fails. */
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34 | protected final boolean continueOnError;
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35 |
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36 | /**
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37 | * Create the command by specifying the list of commands to execute.
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38 | * @param ds The target data set. Must not be {@code null}
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39 | * @param name The description text
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40 | * @param sequenz The sequence that should be executed
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41 | * @param continueOnError Determines if the sequence execution should continue after one of its commands fails
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42 | * @since 12726
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43 | */
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44 | public SequenceCommand(DataSet ds, String name, Collection<Command> sequenz, boolean continueOnError) {
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45 | super(ds);
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46 | this.name = name;
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47 | this.sequence = sequenz.toArray(new Command[0]);
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48 | this.continueOnError = continueOnError;
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49 | }
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50 |
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51 | /**
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52 | * Create the command by specifying the list of commands to execute.
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53 | * @param name The description text
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54 | * @param sequenz The sequence that should be executed. Must not be null or empty
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55 | * @param continueOnError Determines if the sequence execution should continue after one of its commands fails
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56 | * @since 11874
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57 | */
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58 | public SequenceCommand(String name, Collection<Command> sequenz, boolean continueOnError) {
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59 | this(sequenz.iterator().next().getAffectedDataSet(), name, sequenz, continueOnError);
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60 | }
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61 |
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62 | /**
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63 | * Create the command by specifying the list of commands to execute.
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64 | * @param name The description text
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65 | * @param sequenz The sequence that should be executed.
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66 | */
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67 | public SequenceCommand(String name, Collection<Command> sequenz) {
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68 | this(name, sequenz, false);
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69 | }
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70 |
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71 | /**
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72 | * Convenient constructor, if the commands are known at compile time.
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73 | * @param name The description text
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74 | * @param sequenz The sequence that should be executed.
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75 | */
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76 | public SequenceCommand(String name, Command... sequenz) {
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77 | this(name, Arrays.asList(sequenz));
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78 | }
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79 |
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80 | /**
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81 | * Convenient constructor, if the commands are known at compile time.
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82 | * @param name The description text to be used for the sequence command, if one is created.
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83 | * @param sequenz The sequence that should be executed.
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84 | * @return Either a SequenceCommand, or the only command in the potential sequence
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85 | * @since 16573
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86 | */
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87 | public static Command wrapIfNeeded(String name, Command... sequenz) {
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88 | if (sequenz.length == 1) {
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89 | return sequenz[0];
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90 | }
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91 | return new SequenceCommand(name, sequenz);
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92 | }
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93 |
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94 | /**
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95 | * Convenient constructor, if the commands are known at compile time.
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96 | * @param name The description text to be used for the sequence command, if one is created.
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97 | * @param sequenz The sequence that should be executed.
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98 | * @return Either a SequenceCommand, or the only command in the potential sequence
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99 | * @since 16573
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100 | */
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101 | public static Command wrapIfNeeded(String name, Collection<Command> sequenz) {
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102 | if (sequenz.size() == 1) {
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103 | return sequenz.iterator().next();
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104 | }
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105 | return new SequenceCommand(name, sequenz);
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106 | }
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107 |
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108 | @Override public boolean executeCommand() {
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109 | for (int i = 0; i < sequence.length; i++) {
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110 | boolean result;
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111 | try {
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112 | result = sequence[i].executeCommand();
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113 | } catch (AssertionError | Exception e) {
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114 | throw createReportedException(e, i);
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115 | }
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116 | if (!result && !continueOnError) {
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117 | undoCommands(i-1);
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118 | return false;
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119 | }
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120 | }
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121 | sequenceComplete = true;
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122 | return true;
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123 | }
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124 |
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125 | /**
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126 | * Returns the last command.
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127 | * @return The last command, or {@code null} if the sequence is empty.
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128 | */
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129 | public Command getLastCommand() {
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130 | if (sequence.length == 0)
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131 | return null;
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132 | return sequence[sequence.length-1];
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133 | }
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134 |
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135 | protected final void undoCommands(int start) {
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136 | for (int i = start; i >= 0; --i) {
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137 | try {
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138 | sequence[i].undoCommand();
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139 | } catch (AssertionError | Exception e) {
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140 | throw createReportedException(e, i);
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141 | }
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142 | }
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143 | }
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144 |
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145 | private ReportedException createReportedException(Throwable e, int i) {
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146 | ReportedException exception = new ReportedException(e);
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147 | exception.startSection("sequence_information");
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148 | exception.put("sequence_name", getDescriptionText());
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149 | exception.put("sequence_command", sequence[i].getDescriptionText());
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150 | exception.put("sequence_index", i);
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151 | exception.put("sequence_commands", Stream.of(sequence)
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152 | .map(o -> o.getClass().getCanonicalName())
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153 | .map(String::valueOf)
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154 | .collect(Collectors.joining(";", "[", "]")));
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155 | exception.put("sequence_commands_descriptions", Stream.of(sequence)
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156 | .map(Command::getDescriptionText)
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157 | .collect(Collectors.joining(";", "[", "]")));
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158 | return exception;
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159 | }
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160 |
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161 | @Override
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162 | public void undoCommand() {
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163 | // We probably aborted this halfway though the execution sequence because of a sub-command error.
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164 | // We already undid the sub-commands.
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165 | if (!sequenceComplete)
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166 | return;
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167 | undoCommands(sequence.length-1);
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168 | }
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169 |
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170 | @Override
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171 | public void fillModifiedData(Collection<OsmPrimitive> modified, Collection<OsmPrimitive> deleted, Collection<OsmPrimitive> added) {
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172 | for (Command c : sequence) {
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173 | c.fillModifiedData(modified, deleted, added);
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174 | }
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175 | }
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176 |
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177 | @Override
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178 | public String getDescriptionText() {
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179 | return tr("Sequence: {0}", name);
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180 | }
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181 |
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182 | /**
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183 | * Returns the command name used in description text.
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184 | * @return the command name
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185 | * @since 14283
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186 | */
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187 | public final String getName() {
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188 | return name;
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189 | }
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190 |
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191 | @Override
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192 | public Icon getDescriptionIcon() {
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193 | return ImageProvider.get("data", "sequence");
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194 | }
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195 |
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196 | @Override
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197 | public Collection<PseudoCommand> getChildren() {
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198 | return Arrays.<PseudoCommand>asList(sequence);
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199 | }
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200 |
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201 | @Override
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202 | public Collection<? extends OsmPrimitive> getParticipatingPrimitives() {
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203 | Collection<OsmPrimitive> prims = new HashSet<>();
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204 | for (Command c : sequence) {
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205 | prims.addAll(c.getParticipatingPrimitives());
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206 | }
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207 | return prims;
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208 | }
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209 |
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210 | protected final void setSequence(Command... sequence) {
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211 | this.sequence = Utils.copyArray(sequence);
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212 | }
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213 |
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214 | protected final void setSequenceComplete(boolean sequenceComplete) {
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215 | this.sequenceComplete = sequenceComplete;
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216 | }
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217 |
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218 | @Override
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219 | public int hashCode() {
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220 | return Objects.hash(super.hashCode(), Arrays.hashCode(sequence), sequenceComplete, name, continueOnError);
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221 | }
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222 |
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223 | @Override
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224 | public boolean equals(Object obj) {
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225 | if (this == obj) return true;
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226 | if (obj == null || getClass() != obj.getClass()) return false;
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227 | if (!super.equals(obj)) return false;
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228 | SequenceCommand that = (SequenceCommand) obj;
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229 | return sequenceComplete == that.sequenceComplete &&
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230 | continueOnError == that.continueOnError &&
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231 | Arrays.equals(sequence, that.sequence) &&
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232 | Objects.equals(name, that.name);
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233 | }
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234 | }
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