| /* |
| * Copyright (C) 2017, 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.dfs; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.eclipse.jgit.internal.storage.reftable.Reftable; |
| |
| /** Tracks multiple open {@link Reftable} instances. */ |
| public class ReftableStack implements AutoCloseable { |
| /** |
| * Opens a stack of tables for reading. |
| * |
| * @param ctx |
| * context to read the tables with. This {@code ctx} will be |
| * retained by the stack and each of the table readers. |
| * @param files |
| * the tables to open. |
| * @return stack reference to close the tables. |
| * @throws IOException |
| * a table could not be opened |
| */ |
| public static ReftableStack open(DfsReader ctx, List<DfsReftable> files) |
| throws IOException { |
| ReftableStack stack = new ReftableStack(files.size()); |
| boolean close = true; |
| try { |
| for (DfsReftable t : files) { |
| stack.files.add(t); |
| stack.tables.add(t.open(ctx)); |
| } |
| close = false; |
| return stack; |
| } finally { |
| if (close) { |
| stack.close(); |
| } |
| } |
| } |
| |
| private final List<DfsReftable> files; |
| private final List<Reftable> tables; |
| |
| private ReftableStack(int tableCnt) { |
| this.files = new ArrayList<>(tableCnt); |
| this.tables = new ArrayList<>(tableCnt); |
| } |
| |
| /** |
| * @return unmodifiable list of DfsRefatble files, in the same order the |
| * files were passed to {@link #open(DfsReader, List)}. |
| */ |
| public List<DfsReftable> files() { |
| return Collections.unmodifiableList(files); |
| } |
| |
| /** |
| * @return unmodifiable list of tables, in the same order the files were |
| * passed to {@link #open(DfsReader, List)}. |
| */ |
| public List<Reftable> readers() { |
| return Collections.unmodifiableList(tables); |
| } |
| |
| @Override |
| public void close() { |
| for (Reftable t : tables) { |
| try { |
| t.close(); |
| } catch (IOException e) { |
| // Ignore close failures. |
| } |
| } |
| } |
| } |