001    // License: GPL. For details, see LICENSE file.
002    package org.openstreetmap.josm.command;
003    
004    import static org.openstreetmap.josm.tools.I18n.tr;
005    
006    import java.util.Collection;
007    
008    import javax.swing.Icon;
009    
010    import org.openstreetmap.josm.data.osm.OsmPrimitive;
011    import org.openstreetmap.josm.data.osm.OsmPrimitiveType;
012    import org.openstreetmap.josm.data.osm.Relation;
013    import org.openstreetmap.josm.data.osm.RelationMember;
014    import org.openstreetmap.josm.gui.DefaultNameFormatter;
015    import 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     */
022    public 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    }