| /* |
| * 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.analysis.ko.dict; |
| |
| import java.io.BufferedInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import org.apache.lucene.store.DataInput; |
| import org.apache.lucene.store.InputStreamDataInput; |
| import org.apache.lucene.util.fst.FST; |
| import org.apache.lucene.util.fst.PositiveIntOutputs; |
| |
| /** |
| * Binary dictionary implementation for a known-word dictionary model: Words are encoded into an FST |
| * mapping to a list of wordIDs. |
| */ |
| public final class TokenInfoDictionary extends BinaryDictionary { |
| |
| public static final String FST_FILENAME_SUFFIX = "$fst.dat"; |
| |
| private final TokenInfoFST fst; |
| |
| private TokenInfoDictionary() throws IOException { |
| this(ResourceScheme.CLASSPATH, null); |
| } |
| |
| /** |
| * @param resourceScheme - scheme for loading resources (FILE or CLASSPATH). |
| * @param resourcePath - where to load resources (dictionaries) from. If null, with CLASSPATH |
| * scheme only, use this class's name as the path. |
| */ |
| public TokenInfoDictionary(ResourceScheme resourceScheme, String resourcePath) |
| throws IOException { |
| super(resourceScheme, resourcePath); |
| FST<Long> fst; |
| try (InputStream is = new BufferedInputStream(getResource(FST_FILENAME_SUFFIX))) { |
| DataInput in = new InputStreamDataInput(is); |
| fst = new FST<>(in, in, PositiveIntOutputs.getSingleton()); |
| } |
| this.fst = new TokenInfoFST(fst); |
| } |
| |
| public TokenInfoFST getFST() { |
| return fst; |
| } |
| |
| public static TokenInfoDictionary getInstance() { |
| return SingletonHolder.INSTANCE; |
| } |
| |
| private static class SingletonHolder { |
| static final TokenInfoDictionary INSTANCE; |
| |
| static { |
| try { |
| INSTANCE = new TokenInfoDictionary(); |
| } catch (IOException ioe) { |
| throw new RuntimeException("Cannot load TokenInfoDictionary.", ioe); |
| } |
| } |
| } |
| } |