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- /*
- * Copyright (C) 2011, 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.dht;
-
- import static org.eclipse.jgit.storage.dht.KeyUtils.format32;
- import static org.eclipse.jgit.storage.dht.KeyUtils.parse32;
- import static org.eclipse.jgit.util.RawParseUtils.decode;
-
- import java.text.MessageFormat;
-
- import org.eclipse.jgit.lib.Constants;
- import org.eclipse.jgit.lib.ObjectId;
-
- /** Unique identifier of a {@link PackChunk} in the DHT. */
- public final class ChunkKey implements RowKey {
- static final int KEYLEN = 49;
-
- /**
- * @param repo
- * @param chunk
- * @return the key
- */
- public static ChunkKey create(RepositoryKey repo, ObjectId chunk) {
- return new ChunkKey(repo.asInt(), chunk);
- }
-
- /**
- * @param key
- * @return the key
- */
- public static ChunkKey fromBytes(byte[] key) {
- return fromBytes(key, 0, key.length);
- }
-
- /**
- * @param key
- * @param ptr
- * @param len
- * @return the key
- */
- public static ChunkKey fromBytes(byte[] key, int ptr, int len) {
- if (len != KEYLEN)
- throw new IllegalArgumentException(MessageFormat.format(
- DhtText.get().invalidChunkKey, decode(key, ptr, ptr + len)));
-
- int repo = parse32(key, ptr);
- ObjectId chunk = ObjectId.fromString(key, ptr + 9);
- return new ChunkKey(repo, chunk);
- }
-
- /**
- * @param key
- * @return the key
- */
- public static ChunkKey fromString(String key) {
- return fromBytes(Constants.encodeASCII(key));
- }
-
- private final int repo;
-
- private final ObjectId chunk;
-
- ChunkKey(int repo, ObjectId chunk) {
- this.repo = repo;
- this.chunk = chunk;
- }
-
- /** @return the repository that contains the chunk. */
- public RepositoryKey getRepositoryKey() {
- return RepositoryKey.fromInt(repo);
- }
-
- int getRepositoryId() {
- return repo;
- }
-
- /** @return unique SHA-1 describing the chunk. */
- public ObjectId getChunkHash() {
- return chunk;
- }
-
- public byte[] asBytes() {
- byte[] r = new byte[KEYLEN];
- format32(r, 0, repo);
- r[8] = '.';
- chunk.copyTo(r, 9);
- return r;
- }
-
- public String asString() {
- return decode(asBytes());
- }
-
- @Override
- public int hashCode() {
- return chunk.hashCode();
- }
-
- @Override
- public boolean equals(Object other) {
- if (this == other)
- return true;
- if (other instanceof ChunkKey) {
- ChunkKey thisChunk = this;
- ChunkKey otherChunk = (ChunkKey) other;
- return thisChunk.repo == otherChunk.repo
- && thisChunk.chunk.equals(otherChunk.chunk);
- }
- return false;
- }
-
- @Override
- public String toString() {
- return "chunk:" + asString();
- }
- }
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