001// License: GPL. For details, see LICENSE file.
002package org.openstreetmap.josm.command.conflict;
003
004import static org.openstreetmap.josm.tools.I18n.tr;
005
006import java.util.Collection;
007import java.util.Objects;
008import java.util.Set;
009
010import javax.swing.Icon;
011
012import org.openstreetmap.josm.data.conflict.Conflict;
013import org.openstreetmap.josm.data.osm.OsmPrimitive;
014import org.openstreetmap.josm.gui.conflict.pair.MergeDecisionType;
015import org.openstreetmap.josm.tools.ImageProvider;
016
017/**
018 * Represents the resolution of a conflict between the deleted flag of two {@link OsmPrimitive}s.
019 * @since 1654
020 */
021public class DeletedStateConflictResolveCommand extends ConflictResolveCommand {
022
023    /** the conflict to resolve */
024    private final Conflict<? extends OsmPrimitive> conflict;
025
026    /** the merge decision */
027    private final MergeDecisionType decision;
028
029    /**
030     * Constructs a new {@code DeletedStateConflictResolveCommand}.
031     *
032     * @param conflict the conflict data set
033     * @param decision the merge decision
034     */
035    public DeletedStateConflictResolveCommand(Conflict<? extends OsmPrimitive> conflict, MergeDecisionType decision) {
036        this.conflict = conflict;
037        this.decision = decision;
038    }
039
040    @Override
041    public String getDescriptionText() {
042        return tr("Resolve conflicts in deleted state in {0}", conflict.getMy().getId());
043    }
044
045    @Override
046    public Icon getDescriptionIcon() {
047        return ImageProvider.get("data", "object");
048    }
049
050    @Override
051    public boolean executeCommand() {
052        // remember the current state of modified primitives, i.e. of OSM primitive 'my'
053        super.executeCommand();
054
055        if (decision.equals(MergeDecisionType.KEEP_MINE)) {
056            if (conflict.getMy().isDeleted() || conflict.isMyDeleted()) {
057                // because my was involved in a conflict it my still be referred
058                // to from a way or a relation. Fix this now.
059                deleteMy();
060            }
061        } else if (decision.equals(MergeDecisionType.KEEP_THEIR)) {
062            if (conflict.getTheir().isDeleted()) {
063                deleteMy();
064            } else {
065                conflict.getMy().setDeleted(false);
066            }
067        } else
068            // should not happen
069            throw new IllegalStateException(tr("Cannot resolve undecided conflict."));
070
071        rememberConflict(conflict);
072        return true;
073    }
074
075    private void deleteMy() {
076        Set<OsmPrimitive> referrers = getLayer().data.unlinkReferencesToPrimitive(conflict.getMy());
077        for (OsmPrimitive p : referrers) {
078            if (!p.isNew() && !p.isDeleted()) {
079                p.setModified(true);
080            }
081        }
082        conflict.getMy().setDeleted(true);
083    }
084
085    @Override
086    public void fillModifiedData(Collection<OsmPrimitive> modified, Collection<OsmPrimitive> deleted,
087            Collection<OsmPrimitive> added) {
088        modified.add(conflict.getMy());
089        modified.addAll(conflict.getMy().getReferrers());
090    }
091
092    @Override
093    public int hashCode() {
094        return Objects.hash(super.hashCode(), conflict, decision);
095    }
096
097    @Override
098    public boolean equals(Object obj) {
099        if (this == obj) return true;
100        if (obj == null || getClass() != obj.getClass()) return false;
101        if (!super.equals(obj)) return false;
102        DeletedStateConflictResolveCommand that = (DeletedStateConflictResolveCommand) obj;
103        return Objects.equals(conflict, that.conflict) &&
104                decision == that.decision;
105    }
106}