001// License: GPL. For details, see LICENSE file.
002package org.openstreetmap.josm.data.osm.event;
003
004import java.util.Collections;
005import java.util.List;
006import java.util.Map;
007
008import org.openstreetmap.josm.data.osm.DataSet;
009import org.openstreetmap.josm.data.osm.OsmPrimitive;
010
011/**
012 * An event that is triggered if the tags of a single primitive have changed
013 */
014public class TagsChangedEvent extends AbstractDatasetChangedEvent {
015
016    private final OsmPrimitive primitive;
017    private final Map<String, String> originalKeys;
018
019    /**
020     * Constructs a new {@code TagsChangedEvent}.
021     * @param dataSet the dataset from which the event comes from
022     * @param primitive the primitive affected by the change
023     * @param originalKeys the original tags
024     */
025    public TagsChangedEvent(DataSet dataSet, OsmPrimitive primitive, Map<String, String> originalKeys) {
026        super(dataSet);
027        this.primitive = primitive;
028        this.originalKeys = originalKeys;
029    }
030
031    @Override
032    public void fire(DataSetListener listener) {
033        listener.tagsChanged(this);
034    }
035
036    /**
037     * Returns the primitive affected by the change.
038     * @return the primitive affected by the change
039     */
040    public OsmPrimitive getPrimitive() {
041        return primitive;
042    }
043
044    @Override
045    public List<? extends OsmPrimitive> getPrimitives() {
046        return Collections.singletonList(primitive);
047    }
048
049    @Override
050    public DatasetEventType getType() {
051        return DatasetEventType.TAGS_CHANGED;
052    }
053
054    /**
055     * Returns the original tags.
056     * @return the original tags
057     */
058    public Map<String, String> getOriginalKeys() {
059        return originalKeys;
060    }
061
062}