001// License: GPL. For details, see LICENSE file.
002package org.openstreetmap.josm.command;
003
004import static org.openstreetmap.josm.tools.I18n.trn;
005
006import java.util.Collection;
007
008import org.openstreetmap.josm.Main;
009import org.openstreetmap.josm.data.osm.OsmPrimitive;
010
011/**
012 * Command that selects OSM primitives
013 *
014 * @author Landwirt
015 */
016public class SelectCommand extends Command {
017
018    /** the primitives to select when executing the command */
019    private final Collection<OsmPrimitive> newSelection;
020
021    /** the selection before applying the new selection */
022    private Collection<OsmPrimitive> oldSelection;
023
024    /**
025     * Constructs a new select command.
026     * @param newSelection the primitives to select when executing the command.
027     */
028    public SelectCommand(Collection<OsmPrimitive> newSelection) {
029        this.newSelection = newSelection;
030    }
031
032    @Override
033    public void fillModifiedData(Collection<OsmPrimitive> modified, Collection<OsmPrimitive> deleted, Collection<OsmPrimitive> added) {
034    }
035
036    @Override
037    public void undoCommand() {
038        Main.map.mapView.getEditLayer().data.setSelected(oldSelection);
039    }
040
041    @Override
042    public boolean executeCommand() {
043        oldSelection = Main.map.mapView.getEditLayer().data.getSelected();
044        Main.map.mapView.getEditLayer().data.setSelected(newSelection);
045        return true;
046    }
047
048    @Override
049    public String getDescriptionText() {
050        int size = newSelection != null ? newSelection.size() : 0;
051        return trn("Selected {0} object", "Selected {0} objects", size, size);
052    }
053
054    @Override
055    public int hashCode() {
056        final int prime = 31;
057        int result = super.hashCode();
058        result = prime * result + ((newSelection == null) ? 0 : newSelection.hashCode());
059        result = prime * result + ((oldSelection == null) ? 0 : oldSelection.hashCode());
060        return result;
061    }
062
063    @Override
064    public boolean equals(Object obj) {
065        if (this == obj)
066            return true;
067        if (!super.equals(obj))
068            return false;
069        if (getClass() != obj.getClass())
070            return false;
071        SelectCommand other = (SelectCommand) obj;
072        if (newSelection == null) {
073            if (other.newSelection != null)
074                return false;
075        } else if (!newSelection.equals(other.newSelection))
076            return false;
077        if (oldSelection == null) {
078            if (other.oldSelection != null)
079                return false;
080        } else if (!oldSelection.equals(other.oldSelection))
081            return false;
082        return true;
083    }
084}