001// License: GPL. For details, see LICENSE file.
002package org.openstreetmap.josm.command;
003
004import static org.openstreetmap.josm.tools.I18n.tr;
005
006import java.util.Collection;
007
008import javax.swing.Icon;
009
010import org.openstreetmap.josm.data.osm.OsmPrimitive;
011import org.openstreetmap.josm.data.osm.OsmPrimitiveType;
012import org.openstreetmap.josm.data.osm.Relation;
013import org.openstreetmap.josm.data.osm.RelationMember;
014import org.openstreetmap.josm.gui.DefaultNameFormatter;
015import org.openstreetmap.josm.tools.ImageProvider;
016
017/**
018 * Command that changes the role of a relation member
019 *
020 * @author Teemu Koskinen <teemu.koskinen@mbnet.fi>
021 */
022public class ChangeRelationMemberRoleCommand extends Command {
023
024    // The relation to be changed
025    private final Relation relation;
026    // Position of the member
027    private int position = -1;
028    // The new role
029    private final String newRole;
030    // The old role
031    private String oldRole;
032    // Old value of modified
033    private Boolean oldModified;
034
035    public ChangeRelationMemberRoleCommand(Relation relation, int position, String newRole) {
036        super();
037        this.relation = relation;
038        this.position = position;
039        this.newRole = newRole;
040    }
041
042    @Override public boolean executeCommand() {
043        if (position < 0 || position >= relation.getMembersCount())
044            return false;
045
046        oldRole = relation.getMember(position).getRole();
047        if (newRole.equals(oldRole)) return true;
048        relation.setMember(position, new RelationMember(newRole, relation.getMember(position).getMember()));
049
050        oldModified = relation.isModified();
051        relation.setModified(true);
052        return true;
053    }
054
055    @Override public void undoCommand() {
056        relation.setMember(position, new RelationMember(oldRole, relation.getMember(position).getMember()));
057        relation.setModified(oldModified);
058    }
059
060    @Override public void fillModifiedData(Collection<OsmPrimitive> modified, Collection<OsmPrimitive> deleted, Collection<OsmPrimitive> added) {
061        modified.add(relation);
062    }
063
064    @Override
065    public String getDescriptionText() {
066        return tr("Change relation member role for {0} {1}",
067                OsmPrimitiveType.from(relation),
068                relation.getDisplayName(DefaultNameFormatter.getInstance()));
069    }
070
071    @Override
072    public Icon getDescriptionIcon() {
073        return ImageProvider.get(relation.getDisplayType());
074    }
075}