source: josm/src/org/openstreetmap/josm/command/ConflictResolveCommand.java@ 104

package org.openstreetmap.josm.command;

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

import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;

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

import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.data.conflict.ConflictItem;
import org.openstreetmap.josm.data.osm.OsmPrimitive;
import org.openstreetmap.josm.gui.ConflictResolver;
import org.openstreetmap.josm.gui.dialogs.ConflictDialog;
import org.openstreetmap.josm.tools.ImageProvider;

public class ConflictResolveCommand extends Command {

        private final Collection<ConflictItem> conflicts;
        private final Map<OsmPrimitive, OsmPrimitive> resolved;
        private Map<OsmPrimitive, OsmPrimitive> origAllConflicts;
        private final ConflictDialog conflictDialog;

        public ConflictResolveCommand(List<ConflictItem> conflicts, Map<OsmPrimitive, OsmPrimitive> resolved) {
                this.conflicts = conflicts;
                this.resolved = resolved;
                conflictDialog = Main.map.conflictDialog;
        }

        @Override public void executeCommand() {
                super.executeCommand();

                origAllConflicts = new HashMap<OsmPrimitive, OsmPrimitive>(conflictDialog.conflicts);
                
                Set<OsmPrimitive> completed = new HashSet<OsmPrimitive>(resolved.keySet());
                for (ConflictItem ci : conflicts) {
                        for (Entry<OsmPrimitive, OsmPrimitive> e : resolved.entrySet()) {
                                if (ci.resolution == ConflictResolver.Resolution.THEIR)
                                        ci.apply(e.getKey(), e.getValue());
                                else if (ci.resolution == ConflictResolver.Resolution.MY)
                                        ci.apply(e.getValue(), e.getKey());
                                else if (ci.hasConflict(e.getKey(), e.getValue()))
                                        completed.remove(e.getKey());
                        }
                }
                if (!completed.isEmpty()) {
                        for (OsmPrimitive k : completed)
                                conflictDialog.conflicts.remove(k);
                        conflictDialog.rebuildList();
                        Main.map.mapView.recalculateCenterScale(); // in case of auto-zoom
                }
        }

        @Override public void undoCommand() {
                super.undoCommand();
                Main.map.conflictDialog.conflicts.clear();
                Main.map.conflictDialog.conflicts.putAll(origAllConflicts);
                Main.map.conflictDialog.rebuildList();
        }

        @Override public void fillModifiedData(Collection<OsmPrimitive> modified, Collection<OsmPrimitive> deleted, Collection<OsmPrimitive> added) {
                modified.addAll(resolved.keySet());
        }

        @Override public MutableTreeNode description() {
                int i = 0;
                for (ConflictItem c : conflicts)
                        if (c.resolution != null)
                                i++;
                return new DefaultMutableTreeNode(new JLabel(tr("Resolve {0} conflicts in {1} objects",i,resolved.size()), ImageProvider.get("data", "primitive"), JLabel.HORIZONTAL));
    }
}