source: josm/src/org/openstreetmap/josm/command/AddCommand.java@ 94

package org.openstreetmap.josm.command;

import java.util.Collection;

import javax.swing.JLabel;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.MutableTreeNode;

import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.data.osm.OsmPrimitive;
import org.openstreetmap.josm.data.osm.visitor.AddVisitor;
import org.openstreetmap.josm.data.osm.visitor.DeleteVisitor;
import org.openstreetmap.josm.data.osm.visitor.NameVisitor;

/**
 * A command that adds an osm primitive to a dataset. Keys cannot be added this
 * way. Use ChangeKeyValueCommand instead.
 * 
 * @author imi
 */
public class AddCommand extends Command {

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

        /**
         * Create the command and specify the element to add.
         */
        public AddCommand(OsmPrimitive osm) {
                this.osm = osm;
        }

        @Override public void executeCommand() {
                osm.visit(new AddVisitor(Main.ds));
        }

        @Override public void undoCommand() {
                osm.visit(new DeleteVisitor(Main.ds));
        }

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

        @Override public MutableTreeNode description() {
                NameVisitor v = new NameVisitor();
                osm.visit(v);
                return new DefaultMutableTreeNode(new JLabel("Add "+v.className+" "+v.name, v.icon, JLabel.HORIZONTAL));
    }
}