source: josm/trunk/src/org/openstreetmap/josm/command/AddCommand.java@ 7448

// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.command;

import static org.openstreetmap.josm.tools.I18n.marktr;
import static org.openstreetmap.josm.tools.I18n.tr;

import java.util.Collection;
import java.util.Collections;

import javax.swing.Icon;

import org.openstreetmap.josm.data.osm.OsmPrimitive;
import org.openstreetmap.josm.data.osm.OsmPrimitiveType;
import org.openstreetmap.josm.gui.DefaultNameFormatter;
import org.openstreetmap.josm.gui.layer.OsmDataLayer;
import org.openstreetmap.josm.tools.ImageProvider;

/**
 * A command that adds an osm primitive to a dataset. Keys cannot be added this way.
 *
 * See {@link ChangeCommand} for comments on relation back references.
 *
 * @author imi
 */
public class AddCommand extends Command {

    /**
     * The primitive to add to the dataset.
     */
    private final OsmPrimitive osm;

    /**
     * Creates the command and specify the element to add in the context of the current edit layer, if any.
     * @param osm The primitive to add
     */
    public AddCommand(OsmPrimitive osm) {
        this.osm = osm;
    }

    /**
     * Creates the command and specify the element to add in the context of the given data layer.
     * @param layer The data layer. Must not be {@code null}
     * @param osm The primitive to add
     */
    public AddCommand(OsmDataLayer layer, OsmPrimitive osm) {
        super(layer);
        this.osm = osm;
    }

    @Override
    public boolean executeCommand() {
        getLayer().data.addPrimitive(osm);
        osm.setModified(true);
        return true;
    }

    @Override
    public void undoCommand() {
        getLayer().data.removePrimitive(osm);
    }

    @Override
    public void fillModifiedData(Collection<OsmPrimitive> modified, Collection<OsmPrimitive> deleted, Collection<OsmPrimitive> added) {
        added.add(osm);
    }

    @Override
    public String getDescriptionText() {
        String msg;
        switch(OsmPrimitiveType.from(osm)) {
        case NODE: msg = marktr("Add node {0}"); break;
        case WAY: msg = marktr("Add way {0}"); break;
        case RELATION: msg = marktr("Add relation {0}"); break;
        default: /* should not happen */msg = ""; break;
        }
        return tr(msg, osm.getDisplayName(DefaultNameFormatter.getInstance()));
    }

    @Override
    public Icon getDescriptionIcon() {
        return ImageProvider.get(osm.getDisplayType());
    }

    @Override
    public Collection<OsmPrimitive> getParticipatingPrimitives() {
        return Collections.singleton(osm);
    }
}