potato-cake/jtsspatial4lucene

基于jts实现的lucene图形检索

JTSSpatial4Lucene

基于jts实现的lucene图形检索，使用方式与lucene-spatial基本相同。

使用说明：

创建索引：

SpatialStrategy strategy = new GeohashTreeSpatialStrategy();
DirectoryWriter writer = ...;
Document doc = new Document();
for (IndexableField f : strategy.createIndexableFields(GeometryMaker.makePoint(lon, lat))) {
  doc.add(f);
}
writer.addDocument(doc);

检索：

SpatialStrategy strategy = new GeohashTreeSpatialStrategy();
IndexSearcher searcher = ...;
TopScoreDocCollector collector = TopScoreDocCollector.create(100, false);
// 半径5公里的圆
Geometry geometry = GeometryMaker.makeCircle(GeometryMaker.makeBuffer(116.404844, 39.922904), 5);
// 相交
Filter filter = strategy.makeFilter(geometry, SpatialRelation.INTERSECTS);
searcher.search(new MatchAllDocsQuery(), filter, collector);
TopDocs tds = collector.topDocs(0, 10);
ScoreDoc[] hits = tds.scoreDocs;
for (ScoreDoc sd : hits) {
    Document hitDoc = searcher.doc(sd.doc);
    Geometry shape = GeometryMaker.fromDocument(hitDoc);
    ...
}