| /* |
| * Copyright (C) 2015, Google Inc. |
| * and other copyright owners as documented in the project's IP log. |
| * |
| * This program and the accompanying materials are made available |
| * under the terms of the Eclipse Distribution License v1.0 which |
| * accompanies this distribution, is reproduced below, and is |
| * available at http://www.eclipse.org/org/documents/edl-v10.php |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * |
| * - Neither the name of the Eclipse Foundation, Inc. nor the |
| * names of its contributors may be used to endorse or promote |
| * products derived from this software without specific prior |
| * written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
| * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package org.eclipse.jgit.internal.storage.file; |
| |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.io.Reader; |
| |
| import org.eclipse.jgit.lib.AnyObjectId; |
| import org.eclipse.jgit.lib.MutableObjectId; |
| import org.eclipse.jgit.lib.ObjectIdOwnerMap; |
| import org.eclipse.jgit.lib.ObjectIdSet; |
| |
| /** |
| * Lazily loads a set of ObjectIds, one per line. |
| */ |
| public class LazyObjectIdSetFile implements ObjectIdSet { |
| private final File src; |
| private ObjectIdOwnerMap<Entry> set; |
| |
| /** |
| * Create a new lazy set from a file. |
| * |
| * @param src |
| * the source file. |
| */ |
| public LazyObjectIdSetFile(File src) { |
| this.src = src; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public boolean contains(AnyObjectId objectId) { |
| if (set == null) { |
| set = load(); |
| } |
| return set.contains(objectId); |
| } |
| |
| private ObjectIdOwnerMap<Entry> load() { |
| ObjectIdOwnerMap<Entry> r = new ObjectIdOwnerMap<>(); |
| try (FileInputStream fin = new FileInputStream(src); |
| Reader rin = new InputStreamReader(fin, UTF_8); |
| BufferedReader br = new BufferedReader(rin)) { |
| MutableObjectId id = new MutableObjectId(); |
| for (String line; (line = br.readLine()) != null;) { |
| id.fromString(line); |
| if (!r.contains(id)) { |
| r.add(new Entry(id)); |
| } |
| } |
| } catch (IOException e) { |
| // Ignore IO errors accessing the lazy set. |
| } |
| return r; |
| } |
| |
| static class Entry extends ObjectIdOwnerMap.Entry { |
| Entry(AnyObjectId id) { |
| super(id); |
| } |
| } |
| } |