| /* |
| * 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.solr.spelling.suggest; |
| |
| import java.io.IOException; |
| import java.nio.file.Paths; |
| |
| import org.apache.lucene.search.suggest.Lookup; |
| import org.apache.lucene.store.FSDirectory; |
| import org.apache.solr.common.util.NamedList; |
| import org.apache.solr.core.SolrCore; |
| import org.apache.solr.spelling.suggest.jaspell.JaspellLookupFactory; |
| |
| /** |
| * Suggester factory for creating {@link Lookup} instances. |
| */ |
| public abstract class LookupFactory { |
| |
| /** Default lookup implementation to use for SolrSuggester */ |
| public static String DEFAULT_FILE_BASED_DICT = JaspellLookupFactory.class.getName(); |
| |
| /** |
| * Create a Lookup using config options in <code>params</code> and |
| * current <code>core</code> |
| */ |
| public abstract Lookup create(@SuppressWarnings({"rawtypes"})NamedList params, SolrCore core); |
| |
| /** |
| * <p>Returns the filename in which the in-memory data structure is stored </p> |
| * <b>NOTE:</b> not all {@link Lookup} implementations store in-memory data structures |
| * */ |
| public abstract String storeFileName(); |
| |
| /** Non-null if this sugggester created a temp dir, needed only during build */ |
| private static FSDirectory tmpBuildDir; |
| |
| protected static synchronized FSDirectory getTempDir() { |
| if (tmpBuildDir == null) { |
| // Lazy init |
| String tempDirPath = System.getProperty("java.io.tmpdir"); |
| if (tempDirPath == null) { |
| throw new RuntimeException("Java has no temporary folder property (java.io.tmpdir)?"); |
| } |
| try { |
| tmpBuildDir = FSDirectory.open(Paths.get(tempDirPath)); |
| } catch (IOException ioe) { |
| throw new RuntimeException(ioe); |
| } |
| } |
| return tmpBuildDir; |
| } |
| } |