// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.gui.conflict.tags;
import java.util.ArrayList;
import java.util.Collection;
import org.openstreetmap.josm.data.osm.OsmPrimitive;
import org.openstreetmap.josm.data.osm.Tag;
import org.openstreetmap.josm.data.osm.TagCollection;
import org.openstreetmap.josm.data.osm.TigerUtils;
/**
* Collection of utility methods for tag conflict resolution
*
*/
public final class TagConflictResolutionUtil {
/** no constructor, just static utility methods */
private TagConflictResolutionUtil() {}
/**
* Normalizes the tags in the tag collection <code>tc</code> before resolving tag conflicts.
*
* Removes irrelevant tags like "created_by".
*
* For tags which are not present on at least one of the merged nodes, the empty value ""
* is added to the list of values for this tag, but only if there are at least two
* primitives with tags, and at least one tagged primitive do not have this tag.
*
* @param tc the tag collection
* @param merged the collection of merged primitives
*/
public static void normalizeTagCollectionBeforeEditing(TagCollection tc, Collection<? extends OsmPrimitive> merged) {
// remove irrelevant tags
//
for(String key : OsmPrimitive.getDiscardableKeys()) {
tc.removeByKey(key);
}
Collection<OsmPrimitive> taggedPrimitives = new ArrayList<>();
for (OsmPrimitive p: merged) {
if (p.isTagged()) {
taggedPrimitives.add(p);
}
}
if (taggedPrimitives.size() <= 1)
return;
for (String key: tc.getKeys()) {
// make sure the empty value is in the tag set if a tag is not present
// on all merged nodes
//
for (OsmPrimitive p: taggedPrimitives) {
if (p.get(key) == null) {
tc.add(new Tag(key, "")); // add a tag with key and empty value
}
}
}
}
/**
* Combines tags from TIGER data
*
* @param tc the tag collection
*/
public static void combineTigerTags(TagCollection tc) {
for (String key: tc.getKeys()) {
if (TigerUtils.isTigerTag(key)) {
tc.setUniqueForKey(key, TigerUtils.combineTags(key, tc.getValues(key)));
}
}
}
/**
* Completes tags in the tag collection <code>tc</code> with the empty value
* for each tag. If the empty value is present the tag conflict resolution dialog
* will offer an option for removing the tag and not only options for selecting
* one of the current values of the tag.
*
* @param tc the tag collection
*/
public static void completeTagCollectionForEditing(TagCollection tc) {
for (String key: tc.getKeys()) {
// make sure the empty value is in the tag set such that we can delete the tag
// in the conflict dialog if necessary
//
tc.add(new Tag(key,""));
}
}
}