source: josm/trunk/src/org/openstreetmap/josm/command/DeletedStateConflictResolveCommand.java@ 1706

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

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

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.gui.conflict.MergeDecisionType;
import org.openstreetmap.josm.tools.ImageProvider;

/**
 * Represents a the resolution of a conflict between the coordinates of two {@see Node}s
 *
 */
public class DeletedStateConflictResolveCommand extends Command {

    /** my primitive (in the local dataset). merge decisions are applied to this
     *  node
     */
    private final OsmPrimitive my;
    /** their primitive (in the server dataset) */
    private final OsmPrimitive their;

    /** the merge decision */
    private final MergeDecisionType decision;



    /**
     * constructor
     * 
     * @param my  my node
     * @param their  their node
     * @param decision the merge decision
     */
    public DeletedStateConflictResolveCommand(OsmPrimitive my, OsmPrimitive their, MergeDecisionType decision) {
        this.my = my;
        this.their = their;
        this.decision = decision;
    }


    @Override
    public MutableTreeNode description() {
        return new DefaultMutableTreeNode(
                new JLabel(
                        tr("Resolve conflicts in deleted state in {0}",my.id),
                        ImageProvider.get("data", "object"),
                        JLabel.HORIZONTAL
                )
        );
    }

    @Override
    public boolean executeCommand() {
        // remember the current state of modified primitives, i.e. of
        // OSM primitive 'my'
        //
        super.executeCommand();

        if (decision.equals(MergeDecisionType.KEEP_MINE)) {
            if (my.deleted) {
                // because my was involved in a conflict it my still be referred
                // to from a way or a relation. Fix this now.
                //
                Main.main.editLayer().data.unlinkReferencesToPrimitive(my);
            }
        } else if (decision.equals(MergeDecisionType.KEEP_THEIR)) {
            if (their.deleted) {
                Main.main.editLayer().data.unlinkReferencesToPrimitive(my);
                my.delete(true);
            } else {
                my.deleted = their.deleted;
            }
        } else
            // should not happen
            throw new IllegalStateException(tr("cannot resolve undecided conflict"));

        return true;
    }

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

    @Override
    public void undoCommand() {
        // restore former state of modified primitives
        //
        super.undoCommand();

        // restore a conflict if necessary
        //
        if (!Main.map.conflictDialog.conflicts.containsKey(my)) {
            Main.map.conflictDialog.addConflict(my, their);
        }
    }
}