package org.apache.lucene.index;/** * Copyright 2005 The Apache Software Foundation * * Licensed 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.File;import java.io.FilenameFilter;/** * Filename filter that accept filenames and extensions only created by Lucene. *  * @author Daniel Naber / Bernhard Messer * @version $rcs = ' $Id: Exp $ ' ; */public class IndexFileNameFilter implements FilenameFilter {  /* (non-Javadoc)   * @see java.io.FilenameFilter#accept(java.io.File, java.lang.String)   */  public boolean accept(File dir, String name) {    for (int i = 0; i < IndexFileNames.INDEX_EXTENSIONS.length; i++) {      if (name.endsWith("."+IndexFileNames.INDEX_EXTENSIONS[i]))        return true;    }    if (name.equals(IndexFileNames.DELETABLE)) return true;    else if (name.equals(IndexFileNames.SEGMENTS)) return true;    else if (name.matches(".+\\.f\\d+")) return true;    return false;  }}