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- /*
- * Copyright (C) 2007, Robin Rosenberg <robin.rosenberg@dewire.com>
- * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
- * Copyright (C) 2009, 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.storage.file;
-
- import java.io.EOFException;
- import java.io.File;
- import java.io.FileNotFoundException;
- import java.io.FileOutputStream;
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.OutputStream;
- import java.nio.channels.Channels;
- import java.security.DigestOutputStream;
- import java.security.MessageDigest;
- import java.util.zip.Deflater;
- import java.util.zip.DeflaterOutputStream;
-
- import org.eclipse.jgit.errors.ObjectWritingException;
- import org.eclipse.jgit.lib.Config;
- import org.eclipse.jgit.lib.Constants;
- import org.eclipse.jgit.lib.ObjectId;
- import org.eclipse.jgit.lib.ObjectInserter;
- import org.eclipse.jgit.transport.PackParser;
- import org.eclipse.jgit.util.FileUtils;
- import org.eclipse.jgit.util.IO;
-
- /** Creates loose objects in a {@link ObjectDirectory}. */
- class ObjectDirectoryInserter extends ObjectInserter {
- private final FileObjectDatabase db;
-
- private final WriteConfig config;
-
- private Deflater deflate;
-
- ObjectDirectoryInserter(final FileObjectDatabase dest, final Config cfg) {
- db = dest;
- config = cfg.get(WriteConfig.KEY);
- }
-
- @Override
- public ObjectId insert(int type, byte[] data, int off, int len)
- throws IOException {
- ObjectId id = idFor(type, data, off, len);
- if (db.has(id)) {
- return id;
- } else {
- File tmp = toTemp(type, data, off, len);
- return insertOneObject(tmp, id);
- }
- }
-
- @Override
- public ObjectId insert(final int type, long len, final InputStream is)
- throws IOException {
- byte[] buf = buffer(len);
- if (len <= buf.length) {
- int actLen = IO.readFully(is, buf, 0);
- return insert(type, buf, 0, actLen);
-
- } else {
- MessageDigest md = digest();
- File tmp = toTemp(md, type, len, is);
- ObjectId id = ObjectId.fromRaw(md.digest());
- return insertOneObject(tmp, id);
- }
- }
-
- private ObjectId insertOneObject(final File tmp, final ObjectId id)
- throws IOException, ObjectWritingException {
- switch (db.insertUnpackedObject(tmp, id, false /* no duplicate */)) {
- case INSERTED:
- case EXISTS_PACKED:
- case EXISTS_LOOSE:
- return id;
-
- case FAILURE:
- default:
- break;
- }
-
- final File dst = db.fileFor(id);
- throw new ObjectWritingException("Unable to create new object: " + dst);
- }
-
- @Override
- public PackParser newPackParser(InputStream in) throws IOException {
- return new ObjectDirectoryPackParser(db, in);
- }
-
- @Override
- public void flush() throws IOException {
- // Do nothing. Objects are immediately visible.
- }
-
- @Override
- public void release() {
- if (deflate != null) {
- try {
- deflate.end();
- } finally {
- deflate = null;
- }
- }
- }
-
- private File toTemp(final MessageDigest md, final int type, long len,
- final InputStream is) throws IOException, FileNotFoundException,
- Error {
- boolean delete = true;
- File tmp = newTempFile();
- try {
- FileOutputStream fOut = new FileOutputStream(tmp);
- try {
- OutputStream out = fOut;
- if (config.getFSyncObjectFiles())
- out = Channels.newOutputStream(fOut.getChannel());
- DeflaterOutputStream cOut = compress(out);
- DigestOutputStream dOut = new DigestOutputStream(cOut, md);
- writeHeader(dOut, type, len);
-
- final byte[] buf = buffer();
- while (len > 0) {
- int n = is.read(buf, 0, (int) Math.min(len, buf.length));
- if (n <= 0)
- throw shortInput(len);
- dOut.write(buf, 0, n);
- len -= n;
- }
- dOut.flush();
- cOut.finish();
- } finally {
- if (config.getFSyncObjectFiles())
- fOut.getChannel().force(true);
- fOut.close();
- }
-
- delete = false;
- return tmp;
- } finally {
- if (delete)
- FileUtils.delete(tmp);
- }
- }
-
- private File toTemp(final int type, final byte[] buf, final int pos,
- final int len) throws IOException, FileNotFoundException {
- boolean delete = true;
- File tmp = newTempFile();
- try {
- FileOutputStream fOut = new FileOutputStream(tmp);
- try {
- OutputStream out = fOut;
- if (config.getFSyncObjectFiles())
- out = Channels.newOutputStream(fOut.getChannel());
- DeflaterOutputStream cOut = compress(out);
- writeHeader(cOut, type, len);
- cOut.write(buf, pos, len);
- cOut.finish();
- } finally {
- if (config.getFSyncObjectFiles())
- fOut.getChannel().force(true);
- fOut.close();
- }
-
- delete = false;
- return tmp;
- } finally {
- if (delete)
- FileUtils.delete(tmp);
- }
- }
-
- void writeHeader(OutputStream out, final int type, long len)
- throws IOException {
- out.write(Constants.encodedTypeString(type));
- out.write((byte) ' ');
- out.write(Constants.encodeASCII(len));
- out.write((byte) 0);
- }
-
- File newTempFile() throws IOException {
- return File.createTempFile("noz", null, db.getDirectory());
- }
-
- DeflaterOutputStream compress(final OutputStream out) {
- if (deflate == null)
- deflate = new Deflater(config.getCompression());
- else
- deflate.reset();
- return new DeflaterOutputStream(out, deflate, 8192);
- }
-
- private static EOFException shortInput(long missing) {
- return new EOFException("Input did not match supplied length. "
- + missing + " bytes are missing.");
- }
- }
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