| package org.apache.lucene.analysis.ja.dict; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.io.BufferedInputStream; |
| import java.io.InputStream; |
| import java.io.IOException; |
| |
| import org.apache.lucene.store.InputStreamDataInput; |
| import org.apache.lucene.util.IOUtils; |
| 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 { |
| super(); |
| IOException priorE = null; |
| InputStream is = null; |
| FST<Long> fst = null; |
| try { |
| is = getResource(FST_FILENAME_SUFFIX); |
| is = new BufferedInputStream(is); |
| fst = new FST<Long>(new InputStreamDataInput(is), PositiveIntOutputs.getSingleton()); |
| } catch (IOException ioe) { |
| priorE = ioe; |
| } finally { |
| IOUtils.closeWhileHandlingException(priorE, is); |
| } |
| // TODO: some way to configure? |
| this.fst = new TokenInfoFST(fst, true); |
| } |
| |
| 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); |
| } |
| } |
| } |
| |
| } |