/**
* 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.jena.query.text;
import java.io.File;
import java.io.IOException;
import org.apache.jena.atlas.io.IO ;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.Version;
public class TextSearchUtil {
private static Version VER = TextIndexLucene.VER ;
private static final Analyzer analyzer = new StandardAnalyzer(VER);
public static void emptyAndDeleteDirectory(File dir) {
File[] contents = dir.listFiles() ;
if (contents != null) {
for (File content : contents) {
if (content.isDirectory()) {
emptyAndDeleteDirectory(content) ;
} else {
content.delete() ;
}
}
}
dir.delete() ;
}
public static void createEmptyIndex(File indexDir) {
try {
Directory directory = FSDirectory.open(indexDir) ;
IndexWriterConfig wConfig = new IndexWriterConfig(VER, analyzer) ;
// force creation of the index files
try(IndexWriter indexWriter = new IndexWriter(directory, wConfig)) {
}
} catch (IOException ex) {
IO.exception(ex) ;
}
}
}