| /* |
| * 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.luke.app; |
| |
| import java.io.IOException; |
| import java.util.Objects; |
| |
| import org.apache.lucene.luke.app.desktop.util.MessageUtils; |
| import org.apache.lucene.luke.models.LukeException; |
| import org.apache.lucene.luke.models.util.IndexUtils; |
| import org.apache.lucene.store.Directory; |
| |
| /** Directory open/close handler */ |
| public final class DirectoryHandler extends AbstractHandler<DirectoryObserver> { |
| |
| private static final DirectoryHandler instance = new DirectoryHandler(); |
| |
| private LukeStateImpl state; |
| |
| public static DirectoryHandler getInstance() { |
| return instance; |
| } |
| |
| @Override |
| protected void notifyOne(DirectoryObserver observer) { |
| if (state.closed) { |
| observer.closeDirectory(); |
| } else { |
| observer.openDirectory(state); |
| } |
| } |
| |
| public boolean directoryOpened() { |
| return state != null && !state.closed; |
| } |
| |
| public void open(String indexPath, String dirImpl) { |
| Objects.requireNonNull(indexPath); |
| |
| if (directoryOpened()) { |
| close(); |
| } |
| |
| Directory dir; |
| try { |
| dir = IndexUtils.openDirectory(indexPath, dirImpl); |
| } catch (IOException e) { |
| throw new LukeException(MessageUtils.getLocalizedMessage("openindex.message.index_path_invalid", indexPath), e); |
| } |
| |
| state = new LukeStateImpl(); |
| state.indexPath = indexPath; |
| state.dirImpl = dirImpl; |
| state.dir = dir; |
| |
| notifyObservers(); |
| } |
| |
| public void close() { |
| if (state == null) { |
| return; |
| } |
| |
| IndexUtils.close(state.dir); |
| |
| state.closed = true; |
| notifyObservers(); |
| } |
| |
| public LukeState getState() { |
| return state; |
| } |
| |
| private static class LukeStateImpl implements LukeState { |
| private boolean closed = false; |
| |
| private String indexPath; |
| private String dirImpl; |
| private Directory dir; |
| |
| @Override |
| public String getIndexPath() { |
| return indexPath; |
| } |
| |
| @Override |
| public String getDirImpl() { |
| return dirImpl; |
| } |
| |
| @Override |
| public Directory getDirectory() { |
| return dir; |
| } |
| } |
| |
| } |