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- /*
- * Copyright (C) 2010, 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.ByteArrayInputStream;
- import java.io.ByteArrayOutputStream;
- import java.io.IOException;
- import java.security.MessageDigest;
- import java.util.Arrays;
- import java.util.zip.Deflater;
-
- import org.eclipse.jgit.errors.LargeObjectException;
- import org.eclipse.jgit.junit.LocalDiskRepositoryTestCase;
- import org.eclipse.jgit.junit.TestRepository;
- import org.eclipse.jgit.junit.TestRng;
- import org.eclipse.jgit.lib.Constants;
- import org.eclipse.jgit.lib.NullProgressMonitor;
- import org.eclipse.jgit.lib.ObjectId;
- import org.eclipse.jgit.lib.ObjectInserter;
- import org.eclipse.jgit.lib.ObjectLoader;
- import org.eclipse.jgit.lib.ObjectStream;
- import org.eclipse.jgit.revwalk.RevBlob;
- import org.eclipse.jgit.storage.pack.DeltaEncoder;
- import org.eclipse.jgit.transport.IndexPack;
- import org.eclipse.jgit.util.IO;
- import org.eclipse.jgit.util.NB;
- import org.eclipse.jgit.util.TemporaryBuffer;
-
- public class PackFileTest extends LocalDiskRepositoryTestCase {
- private TestRng rng;
-
- private FileRepository repo;
-
- private TestRepository<FileRepository> tr;
-
- private WindowCursor wc;
-
- protected void setUp() throws Exception {
- super.setUp();
- rng = new TestRng(getName());
- repo = createBareRepository();
- tr = new TestRepository<FileRepository>(repo);
- wc = (WindowCursor) repo.newObjectReader();
- }
-
- protected void tearDown() throws Exception {
- if (wc != null)
- wc.release();
- super.tearDown();
- }
-
- public void testWhole_SmallObject() throws Exception {
- final int type = Constants.OBJ_BLOB;
- byte[] data = rng.nextBytes(300);
- RevBlob id = tr.blob(data);
- tr.branch("master").commit().add("A", id).create();
- tr.packAndPrune();
- assertTrue("has blob", wc.has(id));
-
- ObjectLoader ol = wc.open(id);
- assertNotNull("created loader", ol);
- assertEquals(type, ol.getType());
- assertEquals(data.length, ol.getSize());
- assertFalse("is not large", ol.isLarge());
- assertTrue("same content", Arrays.equals(data, ol.getCachedBytes()));
-
- ObjectStream in = ol.openStream();
- assertNotNull("have stream", in);
- assertEquals(type, in.getType());
- assertEquals(data.length, in.getSize());
- byte[] data2 = new byte[data.length];
- IO.readFully(in, data2, 0, data.length);
- assertTrue("same content", Arrays.equals(data2, data));
- assertEquals("stream at EOF", -1, in.read());
- in.close();
- }
-
- public void testWhole_LargeObject() throws Exception {
- final int type = Constants.OBJ_BLOB;
- byte[] data = rng.nextBytes(ObjectLoader.STREAM_THRESHOLD + 5);
- RevBlob id = tr.blob(data);
- tr.branch("master").commit().add("A", id).create();
- tr.packAndPrune();
- assertTrue("has blob", wc.has(id));
-
- ObjectLoader ol = wc.open(id);
- assertNotNull("created loader", ol);
- assertEquals(type, ol.getType());
- assertEquals(data.length, ol.getSize());
- assertTrue("is large", ol.isLarge());
- try {
- ol.getCachedBytes();
- fail("Should have thrown LargeObjectException");
- } catch (LargeObjectException tooBig) {
- assertEquals(id.name(), tooBig.getMessage());
- }
-
- ObjectStream in = ol.openStream();
- assertNotNull("have stream", in);
- assertEquals(type, in.getType());
- assertEquals(data.length, in.getSize());
- byte[] data2 = new byte[data.length];
- IO.readFully(in, data2, 0, data.length);
- assertTrue("same content", Arrays.equals(data2, data));
- assertEquals("stream at EOF", -1, in.read());
- in.close();
- }
-
- public void testDelta_SmallObjectChain() throws Exception {
- ObjectInserter.Formatter fmt = new ObjectInserter.Formatter();
- byte[] data0 = new byte[512];
- Arrays.fill(data0, (byte) 0xf3);
- ObjectId id0 = fmt.idFor(Constants.OBJ_BLOB, data0);
-
- TemporaryBuffer.Heap pack = new TemporaryBuffer.Heap(64 * 1024);
- packHeader(pack, 4);
- objectHeader(pack, Constants.OBJ_BLOB, data0.length);
- deflate(pack, data0);
-
- byte[] data1 = clone(0x01, data0);
- byte[] delta1 = delta(data0, data1);
- ObjectId id1 = fmt.idFor(Constants.OBJ_BLOB, data1);
- objectHeader(pack, Constants.OBJ_REF_DELTA, delta1.length);
- id0.copyRawTo(pack);
- deflate(pack, delta1);
-
- byte[] data2 = clone(0x02, data1);
- byte[] delta2 = delta(data1, data2);
- ObjectId id2 = fmt.idFor(Constants.OBJ_BLOB, data2);
- objectHeader(pack, Constants.OBJ_REF_DELTA, delta2.length);
- id1.copyRawTo(pack);
- deflate(pack, delta2);
-
- byte[] data3 = clone(0x03, data2);
- byte[] delta3 = delta(data2, data3);
- ObjectId id3 = fmt.idFor(Constants.OBJ_BLOB, data3);
- objectHeader(pack, Constants.OBJ_REF_DELTA, delta3.length);
- id2.copyRawTo(pack);
- deflate(pack, delta3);
-
- digest(pack);
- final byte[] raw = pack.toByteArray();
- IndexPack ip = IndexPack.create(repo, new ByteArrayInputStream(raw));
- ip.setFixThin(true);
- ip.index(NullProgressMonitor.INSTANCE);
- ip.renameAndOpenPack();
-
- assertTrue("has blob", wc.has(id3));
-
- ObjectLoader ol = wc.open(id3);
- assertNotNull("created loader", ol);
- assertEquals(Constants.OBJ_BLOB, ol.getType());
- assertEquals(data3.length, ol.getSize());
- assertFalse("is large", ol.isLarge());
- assertNotNull(ol.getCachedBytes());
- assertTrue(Arrays.equals(data3, ol.getCachedBytes()));
-
- ObjectStream in = ol.openStream();
- assertNotNull("have stream", in);
- assertEquals(Constants.OBJ_BLOB, in.getType());
- assertEquals(data3.length, in.getSize());
- byte[] act = new byte[data3.length];
- IO.readFully(in, act, 0, data3.length);
- assertTrue("same content", Arrays.equals(act, data3));
- assertEquals("stream at EOF", -1, in.read());
- in.close();
- }
-
- public void testDelta_LargeObjectChain() throws Exception {
- ObjectInserter.Formatter fmt = new ObjectInserter.Formatter();
- byte[] data0 = new byte[ObjectLoader.STREAM_THRESHOLD + 5];
- Arrays.fill(data0, (byte) 0xf3);
- ObjectId id0 = fmt.idFor(Constants.OBJ_BLOB, data0);
-
- TemporaryBuffer.Heap pack = new TemporaryBuffer.Heap(64 * 1024);
- packHeader(pack, 4);
- objectHeader(pack, Constants.OBJ_BLOB, data0.length);
- deflate(pack, data0);
-
- byte[] data1 = clone(0x01, data0);
- byte[] delta1 = delta(data0, data1);
- ObjectId id1 = fmt.idFor(Constants.OBJ_BLOB, data1);
- objectHeader(pack, Constants.OBJ_REF_DELTA, delta1.length);
- id0.copyRawTo(pack);
- deflate(pack, delta1);
-
- byte[] data2 = clone(0x02, data1);
- byte[] delta2 = delta(data1, data2);
- ObjectId id2 = fmt.idFor(Constants.OBJ_BLOB, data2);
- objectHeader(pack, Constants.OBJ_REF_DELTA, delta2.length);
- id1.copyRawTo(pack);
- deflate(pack, delta2);
-
- byte[] data3 = clone(0x03, data2);
- byte[] delta3 = delta(data2, data3);
- ObjectId id3 = fmt.idFor(Constants.OBJ_BLOB, data3);
- objectHeader(pack, Constants.OBJ_REF_DELTA, delta3.length);
- id2.copyRawTo(pack);
- deflate(pack, delta3);
-
- digest(pack);
- final byte[] raw = pack.toByteArray();
- IndexPack ip = IndexPack.create(repo, new ByteArrayInputStream(raw));
- ip.setFixThin(true);
- ip.index(NullProgressMonitor.INSTANCE);
- ip.renameAndOpenPack();
-
- assertTrue("has blob", wc.has(id3));
-
- ObjectLoader ol = wc.open(id3);
- assertNotNull("created loader", ol);
- assertEquals(Constants.OBJ_BLOB, ol.getType());
- assertEquals(data3.length, ol.getSize());
- assertTrue("is large", ol.isLarge());
- try {
- ol.getCachedBytes();
- fail("Should have thrown LargeObjectException");
- } catch (LargeObjectException tooBig) {
- assertEquals(id3.name(), tooBig.getMessage());
- }
-
- ObjectStream in = ol.openStream();
- assertNotNull("have stream", in);
- assertEquals(Constants.OBJ_BLOB, in.getType());
- assertEquals(data3.length, in.getSize());
- byte[] act = new byte[data3.length];
- IO.readFully(in, act, 0, data3.length);
- assertTrue("same content", Arrays.equals(act, data3));
- assertEquals("stream at EOF", -1, in.read());
- in.close();
- }
-
- public void testDelta_LargeInstructionStream() throws Exception {
- ObjectInserter.Formatter fmt = new ObjectInserter.Formatter();
- byte[] data0 = new byte[32];
- Arrays.fill(data0, (byte) 0xf3);
- ObjectId id0 = fmt.idFor(Constants.OBJ_BLOB, data0);
-
- byte[] data3 = rng.nextBytes(ObjectLoader.STREAM_THRESHOLD + 5);
- ByteArrayOutputStream tmp = new ByteArrayOutputStream();
- DeltaEncoder de = new DeltaEncoder(tmp, data0.length, data3.length);
- de.insert(data3, 0, data3.length);
- byte[] delta3 = tmp.toByteArray();
- assertTrue(delta3.length > ObjectLoader.STREAM_THRESHOLD);
-
- TemporaryBuffer.Heap pack = new TemporaryBuffer.Heap(64 * 1024);
- packHeader(pack, 2);
- objectHeader(pack, Constants.OBJ_BLOB, data0.length);
- deflate(pack, data0);
-
- ObjectId id3 = fmt.idFor(Constants.OBJ_BLOB, data3);
- objectHeader(pack, Constants.OBJ_REF_DELTA, delta3.length);
- id0.copyRawTo(pack);
- deflate(pack, delta3);
-
- digest(pack);
- final byte[] raw = pack.toByteArray();
- IndexPack ip = IndexPack.create(repo, new ByteArrayInputStream(raw));
- ip.setFixThin(true);
- ip.index(NullProgressMonitor.INSTANCE);
- ip.renameAndOpenPack();
-
- assertTrue("has blob", wc.has(id3));
-
- ObjectLoader ol = wc.open(id3);
- assertNotNull("created loader", ol);
- assertEquals(Constants.OBJ_BLOB, ol.getType());
- assertEquals(data3.length, ol.getSize());
- assertTrue("is large", ol.isLarge());
- try {
- ol.getCachedBytes();
- fail("Should have thrown LargeObjectException");
- } catch (LargeObjectException tooBig) {
- assertEquals(id3.name(), tooBig.getMessage());
- }
-
- ObjectStream in = ol.openStream();
- assertNotNull("have stream", in);
- assertEquals(Constants.OBJ_BLOB, in.getType());
- assertEquals(data3.length, in.getSize());
- byte[] act = new byte[data3.length];
- IO.readFully(in, act, 0, data3.length);
- assertTrue("same content", Arrays.equals(act, data3));
- assertEquals("stream at EOF", -1, in.read());
- in.close();
- }
-
- private byte[] clone(int first, byte[] base) {
- byte[] r = new byte[base.length];
- System.arraycopy(base, 1, r, 1, r.length - 1);
- r[0] = (byte) first;
- return r;
- }
-
- private byte[] delta(byte[] base, byte[] dest) throws IOException {
- ByteArrayOutputStream tmp = new ByteArrayOutputStream();
- DeltaEncoder de = new DeltaEncoder(tmp, base.length, dest.length);
- de.insert(dest, 0, 1);
- de.copy(1, base.length - 1);
- return tmp.toByteArray();
- }
-
- private void packHeader(TemporaryBuffer.Heap pack, int cnt)
- throws IOException {
- final byte[] hdr = new byte[8];
- NB.encodeInt32(hdr, 0, 2);
- NB.encodeInt32(hdr, 4, cnt);
- pack.write(Constants.PACK_SIGNATURE);
- pack.write(hdr, 0, 8);
- }
-
- private void objectHeader(TemporaryBuffer.Heap pack, int type, int sz)
- throws IOException {
- byte[] buf = new byte[8];
- int nextLength = sz >>> 4;
- buf[0] = (byte) ((nextLength > 0 ? 0x80 : 0x00) | (type << 4) | (sz & 0x0F));
- sz = nextLength;
- int n = 1;
- while (sz > 0) {
- nextLength >>>= 7;
- buf[n++] = (byte) ((nextLength > 0 ? 0x80 : 0x00) | (sz & 0x7F));
- sz = nextLength;
- }
- pack.write(buf, 0, n);
- }
-
- private void deflate(TemporaryBuffer.Heap pack, final byte[] content)
- throws IOException {
- final Deflater deflater = new Deflater();
- final byte[] buf = new byte[128];
- deflater.setInput(content, 0, content.length);
- deflater.finish();
- do {
- final int n = deflater.deflate(buf, 0, buf.length);
- if (n > 0)
- pack.write(buf, 0, n);
- } while (!deflater.finished());
- deflater.end();
- }
-
- private void digest(TemporaryBuffer.Heap buf) throws IOException {
- MessageDigest md = Constants.newMessageDigest();
- md.update(buf.toByteArray());
- buf.write(md.digest());
- }
- }
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