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 |
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11 | import javax.swing.Icon;
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12 |
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13 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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14 | import org.openstreetmap.josm.tools.ImageProvider;
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15 | import org.openstreetmap.josm.tools.Utils;
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16 |
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17 | /**
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18 | * A command consisting of a sequence of other commands. Executes the other commands
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19 | * and undo them in reverse order.
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20 | * @author imi
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21 | * @since 31
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22 | */
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23 | public class SequenceCommand extends Command {
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24 |
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25 | /** The command sequence to be executed. */
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26 | private Command[] sequence;
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27 | private boolean sequenceComplete;
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28 | private final String name;
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29 | /** Determines if the sequence execution should continue after one of its commands fails. */
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30 | public boolean continueOnError;
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31 |
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32 | /**
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33 | * Create the command by specifying the list of commands to execute.
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34 | * @param name The description text
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35 | * @param sequenz The sequence that should be executed.
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36 | */
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37 | public SequenceCommand(String name, Collection<Command> sequenz) {
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38 | super();
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39 | this.name = name;
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40 | this.sequence = sequenz.toArray(new Command[sequenz.size()]);
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41 | }
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42 |
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43 | /**
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44 | * Convenient constructor, if the commands are known at compile time.
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45 | * @param name The description text
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46 | * @param sequenz The sequence that should be executed.
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47 | */
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48 | public SequenceCommand(String name, Command... sequenz) {
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49 | this(name, Arrays.asList(sequenz));
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50 | }
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51 |
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52 | @Override public boolean executeCommand() {
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53 | for (int i = 0; i < sequence.length; i++) {
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54 | boolean result = sequence[i].executeCommand();
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55 | if (!result && !continueOnError) {
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56 | undoCommands(i-1);
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57 | return false;
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58 | }
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59 | }
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60 | sequenceComplete = true;
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61 | return true;
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62 | }
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63 |
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64 | /**
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65 | * Returns the last command.
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66 | * @return The last command, or {@code null} if the sequence is empty.
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67 | */
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68 | public Command getLastCommand() {
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69 | if (sequence.length == 0)
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70 | return null;
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71 | return sequence[sequence.length-1];
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72 | }
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73 |
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74 | protected final void undoCommands(int start) {
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75 | // We probably aborted this halfway though the
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76 | // execution sequence because of a sub-command
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77 | // error. We already undid the sub-commands.
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78 | if (!sequenceComplete)
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79 | return;
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80 | for (int i = start; i >= 0; --i) {
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81 | sequence[i].undoCommand();
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82 | }
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83 | }
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84 |
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85 | @Override public void undoCommand() {
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86 | undoCommands(sequence.length-1);
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87 | }
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88 |
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89 | @Override public void fillModifiedData(Collection<OsmPrimitive> modified, Collection<OsmPrimitive> deleted, Collection<OsmPrimitive> added) {
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90 | for (Command c : sequence) {
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91 | c.fillModifiedData(modified, deleted, added);
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92 | }
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93 | }
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94 |
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95 | @Override
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96 | public String getDescriptionText() {
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97 | return tr("Sequence: {0}", name);
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98 | }
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99 |
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100 | @Override
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101 | public Icon getDescriptionIcon() {
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102 | return ImageProvider.get("data", "sequence");
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103 | }
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104 |
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105 | @Override
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106 | public Collection<PseudoCommand> getChildren() {
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107 | return Arrays.<PseudoCommand>asList(sequence);
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108 | }
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109 |
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110 | @Override
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111 | public Collection<? extends OsmPrimitive> getParticipatingPrimitives() {
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112 | Collection<OsmPrimitive> prims = new HashSet<>();
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113 | for (Command c : sequence) {
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114 | prims.addAll(c.getParticipatingPrimitives());
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115 | }
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116 | return prims;
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117 | }
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118 |
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119 | protected final void setSequence(Command ... sequence) {
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120 | this.sequence = Utils.copyArray(sequence);
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121 | }
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122 |
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123 | protected final void setSequenceComplete(boolean sequenceComplete) {
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124 | this.sequenceComplete = sequenceComplete;
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125 | }
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126 |
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127 | @Override
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128 | public void invalidateAffectedLayers() {
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129 | super.invalidateAffectedLayers();
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130 | for (Command c : sequence) {
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131 | c.invalidateAffectedLayers();
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132 | }
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133 | }
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134 |
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135 | @Override
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136 | public int hashCode() {
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137 | return Objects.hash(super.hashCode(), Arrays.hashCode(sequence), sequenceComplete, name, continueOnError);
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138 | }
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139 |
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140 | @Override
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141 | public boolean equals(Object obj) {
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142 | if (this == obj) return true;
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143 | if (obj == null || getClass() != obj.getClass()) return false;
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144 | if (!super.equals(obj)) return false;
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145 | SequenceCommand that = (SequenceCommand) obj;
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146 | return sequenceComplete == that.sequenceComplete &&
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147 | continueOnError == that.continueOnError &&
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148 | Arrays.equals(sequence, that.sequence) &&
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149 | Objects.equals(name, that.name);
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150 | }
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151 | }
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