source: josm/trunk/src/org/openstreetmap/josm/command/DeleteCommand.java@ 755

// License: GPL. Copyright 2007 by Immanuel Scholz and others
package org.openstreetmap.josm.command;

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

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

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

import org.openstreetmap.josm.data.osm.OsmPrimitive;
import org.openstreetmap.josm.data.osm.visitor.NameVisitor;
import org.openstreetmap.josm.tools.ImageProvider;

/**
 * A command to delete a number of primitives from the dataset.
 * @author imi
 */
public class DeleteCommand extends Command {

        /**
         * The primitive that get deleted.
         */
        private final Collection<? extends OsmPrimitive> data;

    /** 
     * Constructor for a collection of data
     */
        public DeleteCommand(Collection<? extends OsmPrimitive> data) {
                this.data = data;
        }
    /** 
     * Constructor for a single data item. Use the collection 
     * constructor to delete multiple objects.
     */
    public DeleteCommand(OsmPrimitive data) {
        this.data = Collections.singleton(data);
    }

        @Override public boolean executeCommand() {
                super.executeCommand();
                for (OsmPrimitive osm : data) {
                        osm.delete(true);
                }
                return true;
        }
        
        @Override public void fillModifiedData(Collection<OsmPrimitive> modified, Collection<OsmPrimitive> deleted, Collection<OsmPrimitive> added) {
                deleted.addAll(data);
        }

        @Override public MutableTreeNode description() {
                NameVisitor v = new NameVisitor();

                if (data.size() == 1) {
                        data.iterator().next().visit(v);
                        return new DefaultMutableTreeNode(new JLabel(tr("Delete {1} {0}", v.name, tr(v.className)), v.icon, JLabel.HORIZONTAL));
                }

                String cname = null;
                String cnamem = null;
                for (OsmPrimitive osm : data) {
                        osm.visit(v);
                        if (cname == null)
                        {
                                cname = v.className;
                                cnamem = v.classNamePlural;
                        }
                        else if (!cname.equals(v.className))
                        {
                                cname = "object";
                                cnamem = trn("object", "objects", 2);
                        }
                }
                DefaultMutableTreeNode root = new DefaultMutableTreeNode(new JLabel(
                                tr("Delete {0} {1}", data.size(), trn(cname, cnamem, data.size())), ImageProvider.get("data", cname), JLabel.HORIZONTAL));
                for (OsmPrimitive osm : data) {
                        osm.visit(v);
                        root.add(new DefaultMutableTreeNode(v.toLabel()));
                }
                return root;
        }
}