| /* |
| * 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.File; |
| import java.io.IOException; |
| import java.util.Collection; |
| import java.util.Set; |
| |
| import org.eclipse.jgit.lib.AbbreviatedObjectId; |
| import org.eclipse.jgit.lib.AnyObjectId; |
| import org.eclipse.jgit.lib.Config; |
| import org.eclipse.jgit.lib.ObjectDatabase; |
| import org.eclipse.jgit.lib.ObjectId; |
| import org.eclipse.jgit.lib.ObjectLoader; |
| import org.eclipse.jgit.lib.ObjectReader; |
| import org.eclipse.jgit.storage.pack.CachedPack; |
| import org.eclipse.jgit.storage.pack.ObjectToPack; |
| import org.eclipse.jgit.storage.pack.PackWriter; |
| import org.eclipse.jgit.util.FS; |
| |
| abstract class FileObjectDatabase extends ObjectDatabase { |
| static enum InsertLooseObjectResult { |
| INSERTED, EXISTS_PACKED, EXISTS_LOOSE, FAILURE; |
| } |
| |
| @Override |
| public ObjectReader newReader() { |
| return new WindowCursor(this); |
| } |
| |
| @Override |
| public ObjectDirectoryInserter newInserter() { |
| return new ObjectDirectoryInserter(this, getConfig()); |
| } |
| |
| /** |
| * Does the requested object exist in this database? |
| * <p> |
| * Alternates (if present) are searched automatically. |
| * |
| * @param objectId |
| * identity of the object to test for existence of. |
| * @return true if the specified object is stored in this database, or any |
| * of the alternate databases. |
| */ |
| public boolean has(final AnyObjectId objectId) { |
| return hasObjectImpl1(objectId) || hasObjectImpl2(objectId.name()); |
| } |
| |
| /** |
| * Compute the location of a loose object file. |
| * |
| * @param objectId |
| * identity of the loose object to map to the directory. |
| * @return location of the object, if it were to exist as a loose object. |
| */ |
| File fileFor(final AnyObjectId objectId) { |
| return fileFor(objectId.name()); |
| } |
| |
| File fileFor(final String objectName) { |
| final String d = objectName.substring(0, 2); |
| final String f = objectName.substring(2); |
| return new File(new File(getDirectory(), d), f); |
| } |
| |
| final boolean hasObjectImpl1(final AnyObjectId objectId) { |
| if (hasObject1(objectId)) |
| return true; |
| |
| for (final AlternateHandle alt : myAlternates()) { |
| if (alt.db.hasObjectImpl1(objectId)) |
| return true; |
| } |
| |
| return tryAgain1() && hasObject1(objectId); |
| } |
| |
| final boolean hasObjectImpl2(final String objectId) { |
| if (hasObject2(objectId)) |
| return true; |
| |
| for (final AlternateHandle alt : myAlternates()) { |
| if (alt.db.hasObjectImpl2(objectId)) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| abstract void resolve(Set<ObjectId> matches, AbbreviatedObjectId id) |
| throws IOException; |
| |
| abstract Config getConfig(); |
| |
| abstract FS getFS(); |
| |
| /** |
| * Open an object from this database. |
| * <p> |
| * Alternates (if present) are searched automatically. |
| * |
| * @param curs |
| * temporary working space associated with the calling thread. |
| * @param objectId |
| * identity of the object to open. |
| * @return a {@link ObjectLoader} for accessing the data of the named |
| * object, or null if the object does not exist. |
| * @throws IOException |
| */ |
| ObjectLoader openObject(final WindowCursor curs, final AnyObjectId objectId) |
| throws IOException { |
| ObjectLoader ldr; |
| |
| ldr = openObjectImpl1(curs, objectId); |
| if (ldr != null) |
| return ldr; |
| |
| ldr = openObjectImpl2(curs, objectId.name(), objectId); |
| if (ldr != null) |
| return ldr; |
| |
| return null; |
| } |
| |
| final ObjectLoader openObjectImpl1(final WindowCursor curs, |
| final AnyObjectId objectId) throws IOException { |
| ObjectLoader ldr; |
| |
| ldr = openObject1(curs, objectId); |
| if (ldr != null) |
| return ldr; |
| |
| for (final AlternateHandle alt : myAlternates()) { |
| ldr = alt.db.openObjectImpl1(curs, objectId); |
| if (ldr != null) |
| return ldr; |
| } |
| |
| if (tryAgain1()) { |
| ldr = openObject1(curs, objectId); |
| if (ldr != null) |
| return ldr; |
| } |
| |
| return null; |
| } |
| |
| final ObjectLoader openObjectImpl2(final WindowCursor curs, |
| final String objectName, final AnyObjectId objectId) |
| throws IOException { |
| ObjectLoader ldr; |
| |
| ldr = openObject2(curs, objectName, objectId); |
| if (ldr != null) |
| return ldr; |
| |
| for (final AlternateHandle alt : myAlternates()) { |
| ldr = alt.db.openObjectImpl2(curs, objectName, objectId); |
| if (ldr != null) |
| return ldr; |
| } |
| |
| return null; |
| } |
| |
| long getObjectSize(WindowCursor curs, AnyObjectId objectId) |
| throws IOException { |
| long sz = getObjectSizeImpl1(curs, objectId); |
| if (0 <= sz) |
| return sz; |
| return getObjectSizeImpl2(curs, objectId.name(), objectId); |
| } |
| |
| final long getObjectSizeImpl1(final WindowCursor curs, |
| final AnyObjectId objectId) throws IOException { |
| long sz; |
| |
| sz = getObjectSize1(curs, objectId); |
| if (0 <= sz) |
| return sz; |
| |
| for (final AlternateHandle alt : myAlternates()) { |
| sz = alt.db.getObjectSizeImpl1(curs, objectId); |
| if (0 <= sz) |
| return sz; |
| } |
| |
| if (tryAgain1()) { |
| sz = getObjectSize1(curs, objectId); |
| if (0 <= sz) |
| return sz; |
| } |
| |
| return -1; |
| } |
| |
| final long getObjectSizeImpl2(final WindowCursor curs, |
| final String objectName, final AnyObjectId objectId) |
| throws IOException { |
| long sz; |
| |
| sz = getObjectSize2(curs, objectName, objectId); |
| if (0 <= sz) |
| return sz; |
| |
| for (final AlternateHandle alt : myAlternates()) { |
| sz = alt.db.getObjectSizeImpl2(curs, objectName, objectId); |
| if (0 <= sz) |
| return sz; |
| } |
| |
| return -1; |
| } |
| |
| abstract void selectObjectRepresentation(PackWriter packer, |
| ObjectToPack otp, WindowCursor curs) throws IOException; |
| |
| abstract File getDirectory(); |
| |
| abstract Collection<? extends CachedPack> getCachedPacks() |
| throws IOException; |
| |
| abstract AlternateHandle[] myAlternates(); |
| |
| abstract boolean tryAgain1(); |
| |
| abstract boolean hasObject1(AnyObjectId objectId); |
| |
| abstract boolean hasObject2(String objectId); |
| |
| abstract ObjectLoader openObject1(WindowCursor curs, AnyObjectId objectId) |
| throws IOException; |
| |
| abstract ObjectLoader openObject2(WindowCursor curs, String objectName, |
| AnyObjectId objectId) throws IOException; |
| |
| abstract long getObjectSize1(WindowCursor curs, AnyObjectId objectId) |
| throws IOException; |
| |
| abstract long getObjectSize2(WindowCursor curs, String objectName, |
| AnyObjectId objectId) throws IOException; |
| |
| abstract InsertLooseObjectResult insertUnpackedObject(File tmp, |
| ObjectId id, boolean createDuplicate) throws IOException; |
| |
| abstract PackFile openPack(File pack, File idx) throws IOException; |
| |
| abstract FileObjectDatabase newCachedFileObjectDatabase(); |
| |
| static class AlternateHandle { |
| final FileObjectDatabase db; |
| |
| AlternateHandle(FileObjectDatabase db) { |
| this.db = db; |
| } |
| |
| @SuppressWarnings("unchecked") |
| Collection<CachedPack> getCachedPacks() throws IOException { |
| return (Collection<CachedPack>) db.getCachedPacks(); |
| } |
| |
| void close() { |
| db.close(); |
| } |
| } |
| |
| static class AlternateRepository extends AlternateHandle { |
| final FileRepository repository; |
| |
| AlternateRepository(FileRepository r) { |
| super(r.getObjectDatabase()); |
| repository = r; |
| } |
| |
| void close() { |
| repository.close(); |
| } |
| } |
| } |