| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /** |
| * This package is about SpatialPrefixTree and any supporting classes. |
| * A SpatialPrefixTree supports spatial indexing by index-time tokens |
| * where adding characters to a string gives greater resolution. |
| * <p> |
| * Potential Implementations include: |
| * <ul> |
| * <li>http://en.wikipedia.org/wiki/Quadtree |
| * <li>http://en.wikipedia.org/wiki/Geohash |
| * <li>http://healpix.jpl.nasa.gov/ |
| * </ul> |
| */ |
| package org.apache.lucene.spatial.prefix.tree; |
