001 package de.deepamehta.plugins.geomaps.model;
002
003 import de.deepamehta.core.JSONEnabled;
004 import de.deepamehta.core.RelatedTopic;
005 import de.deepamehta.core.Topic;
006 import de.deepamehta.core.model.TopicModel;
007 import de.deepamehta.core.service.DeepaMehtaService;
008 import de.deepamehta.core.service.ResultList;
009 import de.deepamehta.core.util.DeepaMehtaUtils;
010
011 import org.codehaus.jettison.json.JSONObject;
012
013 import java.util.HashMap;
014 import java.util.Map;
015 import java.util.logging.Logger;
016
017
018
019 /**
020 * A geomap model: a collection of Geo Coordinate topics.
021 * <p>
022 * Features:
023 * - load from DB (by constructor).
024 * - Serialization to JSON.
025 */
026 public class Geomap implements JSONEnabled {
027
028 // ---------------------------------------------------------------------------------------------- Instance Variables
029
030 protected Topic geomapTopic;
031 protected Map<Long, TopicModel> topics = new HashMap();
032
033 protected DeepaMehtaService dms;
034
035 private Logger logger = Logger.getLogger(getClass().getName());
036
037 // ---------------------------------------------------------------------------------------------------- Constructors
038
039 /**
040 * Loads a topicmap from the DB.
041 */
042 public Geomap(long geomapId, DeepaMehtaService dms) {
043 this.geomapTopic = dms.getTopic(geomapId, true); // fetchComposite=true
044 this.dms = dms;
045 //
046 logger.info("Loading geomap " + getId());
047 loadTopics();
048 }
049
050 // -------------------------------------------------------------------------------------------------- Public Methods
051
052 public long getId() {
053 return geomapTopic.getId();
054 }
055
056 // ---
057
058 public static ResultList<RelatedTopic> fetchGeomapTopics(long geomapId, DeepaMehtaService dms) {
059 Topic geomapTopic = dms.getTopic(geomapId, false); // fetchComposite=false
060 return fetchGeomapTopics(geomapTopic, false); // fetchComposite=false
061 }
062
063 public boolean containsTopic(long topicId) {
064 return topics.get(topicId) != null;
065 }
066
067 // ---
068
069 @Override
070 public JSONObject toJSON() {
071 try {
072 JSONObject topicmap = new JSONObject();
073 topicmap.put("info", geomapTopic.toJSON());
074 topicmap.put("topics", DeepaMehtaUtils.objectsToJSON(topics.values()));
075 return topicmap;
076 } catch (Exception e) {
077 throw new RuntimeException("Serialization failed (" + this + ")", e);
078 }
079 }
080
081 @Override
082 public String toString() {
083 return "geomap " + getId();
084 }
085
086 // ------------------------------------------------------------------------------------------------- Private Methods
087
088 private void loadTopics() {
089 ResultList<RelatedTopic> mapTopics = fetchGeomapTopics(geomapTopic, true); // fetchComposite=true
090 for (RelatedTopic mapTopic : mapTopics) {
091 addTopic(mapTopic.getModel());
092 }
093 }
094
095 private static ResultList<RelatedTopic> fetchGeomapTopics(Topic geomapTopic, boolean fetchComposite) {
096 return geomapTopic.getRelatedTopics("dm4.geomaps.geotopic_mapcontext", "dm4.core.default",
097 "dm4.topicmaps.topicmap_topic", "dm4.geomaps.geo_coordinate", fetchComposite, false, 0);
098 // fetchRelatingComposite=false, maxResultSize=0, clientContext=null
099 }
100
101 private void addTopic(TopicModel topic) {
102 topics.put(topic.getId(), topic);
103 }
104 }