| /* |
| * Copyright (C) 2017, Markus Duft <markus.duft@ssi-schaefer.com> |
| * 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.lfs; |
| |
| import java.io.IOException; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.attribute.BasicFileAttributes; |
| |
| import org.eclipse.jgit.errors.LargeObjectException; |
| import org.eclipse.jgit.errors.MissingObjectException; |
| import org.eclipse.jgit.lib.Constants; |
| import org.eclipse.jgit.lib.ObjectLoader; |
| import org.eclipse.jgit.lib.ObjectStream; |
| import org.eclipse.jgit.storage.pack.PackConfig; |
| import org.eclipse.jgit.util.IO; |
| |
| /** |
| * An {@link ObjectLoader} implementation that reads a media file from the LFS |
| * storage. |
| * |
| * @since 4.11 |
| */ |
| public class LfsBlobLoader extends ObjectLoader { |
| |
| private Path mediaFile; |
| |
| private BasicFileAttributes attributes; |
| |
| private byte[] cached; |
| |
| /** |
| * Create a loader for the LFS media file at the given path. |
| * |
| * @param mediaFile |
| * path to the file |
| * @throws IOException |
| * in case of an error reading attributes |
| */ |
| public LfsBlobLoader(Path mediaFile) throws IOException { |
| this.mediaFile = mediaFile; |
| this.attributes = Files.readAttributes(mediaFile, |
| BasicFileAttributes.class); |
| } |
| |
| @Override |
| public int getType() { |
| return Constants.OBJ_BLOB; |
| } |
| |
| @Override |
| public long getSize() { |
| return attributes.size(); |
| } |
| |
| @Override |
| public byte[] getCachedBytes() throws LargeObjectException { |
| if (getSize() > PackConfig.DEFAULT_BIG_FILE_THRESHOLD) { |
| throw new LargeObjectException(); |
| } |
| |
| if (cached == null) { |
| try { |
| cached = IO.readFully(mediaFile.toFile()); |
| } catch (IOException ioe) { |
| throw new LargeObjectException(ioe); |
| } |
| } |
| return cached; |
| } |
| |
| @Override |
| public ObjectStream openStream() |
| throws MissingObjectException, IOException { |
| return new ObjectStream.Filter(getType(), getSize(), |
| Files.newInputStream(mediaFile)); |
| } |
| |
| } |