123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285 |
- /*
- * 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.Set;
-
- import org.eclipse.jgit.lib.AbbreviatedObjectId;
- import org.eclipse.jgit.lib.AnyObjectId;
- 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.ObjectToPack;
- import org.eclipse.jgit.storage.pack.PackWriter;
-
- abstract class FileObjectDatabase extends ObjectDatabase {
- static enum InsertLooseObjectResult {
- INSERTED, EXISTS_PACKED, EXISTS_LOOSE, FAILURE;
- }
-
- @Override
- public ObjectReader newReader() {
- return new WindowCursor(this);
- }
-
- @Override
- public abstract ObjectDirectoryInserter newInserter();
-
- /**
- * 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());
- }
-
- 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;
-
- /**
- * 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 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);
-
- abstract FileObjectDatabase newCachedFileObjectDatabase();
-
- static class AlternateHandle {
- final FileObjectDatabase db;
-
- AlternateHandle(FileObjectDatabase db) {
- this.db = db;
- }
-
- void close() {
- db.close();
- }
- }
-
- static class AlternateRepository extends AlternateHandle {
- final FileRepository repository;
-
- AlternateRepository(FileRepository r) {
- super(r.getObjectDatabase());
- repository = r;
- }
-
- void close() {
- repository.close();
- }
- }
- }
|