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- /*
- * 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));
- }
-
- }
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