| /* |
| * 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. |
| */ |
| package org.apache.lucene.facet.taxonomy.writercache; |
| |
| import org.apache.lucene.facet.taxonomy.FacetLabel; |
| |
| /** |
| * An LRU cache of mapping from name to int. |
| * Used to cache Ordinals of category paths. |
| * It uses as key, hash of the path instead of the path. |
| * This way the cache takes less RAM, but correctness depends on |
| * assuming no collisions. |
| * |
| * @lucene.experimental |
| */ |
| public class NameHashIntCacheLRU extends NameIntCacheLRU { |
| |
| NameHashIntCacheLRU(int maxCacheSize) { |
| super(maxCacheSize); |
| } |
| |
| @Override |
| Object key(FacetLabel name) { |
| return name.longHashCode(); |
| } |
| |
| @Override |
| Object key(FacetLabel name, int prefixLen) { |
| return name.subpath(prefixLen).longHashCode(); |
| } |
| |
| } |