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- /*
- * Copyright (C) 2007, Dave Watson <dwatson@mimvista.com>
- * Copyright (C) 2006-2007, Robin Rosenberg <robin.rosenberg@dewire.com>
- * Copyright (C) 2006-2007, Shawn O. Pearce <spearce@spearce.org>
- * 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.lib;
-
- import java.io.ByteArrayInputStream;
- import java.io.DataInputStream;
- import java.io.IOException;
- import java.nio.charset.Charset;
-
- import org.eclipse.jgit.errors.CorruptObjectException;
- import org.eclipse.jgit.errors.MissingObjectException;
-
- /**
- * Instances of this class represent a Commit object. It represents a snapshot
- * in a Git repository, who created it and when.
- */
- public class Commit implements Treeish {
- private static final ObjectId[] EMPTY_OBJECTID_LIST = new ObjectId[0];
-
- private final Repository objdb;
-
- private ObjectId commitId;
-
- private ObjectId treeId;
-
- private ObjectId[] parentIds;
-
- private PersonIdent author;
-
- private PersonIdent committer;
-
- private String message;
-
- private Tree treeObj;
-
- private byte[] raw;
-
- private Charset encoding;
-
- /**
- * Create an empty commit object. More information must be fed to this
- * object to make it useful.
- *
- * @param db
- * The repository with which to associate it.
- */
- public Commit(final Repository db) {
- objdb = db;
- parentIds = EMPTY_OBJECTID_LIST;
- }
-
- /**
- * Create a commit associated with these parents and associate it with a
- * repository.
- *
- * @param db
- * The repository to which this commit object belongs
- * @param parentIds
- * Id's of the parent(s)
- */
- public Commit(final Repository db, final ObjectId[] parentIds) {
- objdb = db;
- this.parentIds = parentIds;
- }
-
- /**
- * Create a commit object with the specified id and data from and existing
- * commit object in a repository.
- *
- * @param db
- * The repository to which this commit object belongs
- * @param id
- * Commit id
- * @param raw
- * Raw commit object data
- */
- public Commit(final Repository db, final ObjectId id, final byte[] raw) {
- objdb = db;
- commitId = id;
- treeId = ObjectId.fromString(raw, 5);
- parentIds = new ObjectId[1];
- int np=0;
- int rawPtr = 46;
- for (;;) {
- if (raw[rawPtr] != 'p')
- break;
- if (np == 0) {
- parentIds[np++] = ObjectId.fromString(raw, rawPtr + 7);
- } else if (np == 1) {
- parentIds = new ObjectId[] { parentIds[0], ObjectId.fromString(raw, rawPtr + 7) };
- np++;
- } else {
- if (parentIds.length <= np) {
- ObjectId[] old = parentIds;
- parentIds = new ObjectId[parentIds.length+32];
- for (int i=0; i<np; ++i)
- parentIds[i] = old[i];
- }
- parentIds[np++] = ObjectId.fromString(raw, rawPtr + 7);
- }
- rawPtr += 48;
- }
- if (np != parentIds.length) {
- ObjectId[] old = parentIds;
- parentIds = new ObjectId[np];
- for (int i=0; i<np; ++i)
- parentIds[i] = old[i];
- } else
- if (np == 0)
- parentIds = EMPTY_OBJECTID_LIST;
- this.raw = raw;
- }
-
- /**
- * @return get repository for the commit
- */
- public Repository getRepository() {
- return objdb;
- }
-
- /**
- * @return The commit object id
- */
- public ObjectId getCommitId() {
- return commitId;
- }
-
- /**
- * Set the id of this object.
- *
- * @param id
- * the id that we calculated for this object.
- */
- public void setCommitId(final ObjectId id) {
- commitId = id;
- }
-
- public ObjectId getTreeId() {
- return treeId;
- }
-
- /**
- * Set the tree id for this commit object
- *
- * @param id
- */
- public void setTreeId(final ObjectId id) {
- if (treeId==null || !treeId.equals(id)) {
- treeObj = null;
- }
- treeId = id;
- }
-
- public Tree getTree() throws IOException {
- if (treeObj == null) {
- treeObj = objdb.mapTree(getTreeId());
- if (treeObj == null) {
- throw new MissingObjectException(getTreeId(),
- Constants.TYPE_TREE);
- }
- }
- return treeObj;
- }
-
- /**
- * Set the tree object for this commit
- * @see #setTreeId
- * @param t the Tree object
- */
- public void setTree(final Tree t) {
- treeId = t.getTreeId();
- treeObj = t;
- }
-
- /**
- * @return the author and authoring time for this commit
- */
- public PersonIdent getAuthor() {
- decode();
- return author;
- }
-
- /**
- * Set the author and authoring time for this commit
- * @param a
- */
- public void setAuthor(final PersonIdent a) {
- author = a;
- }
-
- /**
- * @return the committer and commit time for this object
- */
- public PersonIdent getCommitter() {
- decode();
- return committer;
- }
-
- /**
- * Set the committer and commit time for this object
- * @param c the committer information
- */
- public void setCommitter(final PersonIdent c) {
- committer = c;
- }
-
- /**
- * @return the object ids of this commit
- */
- public ObjectId[] getParentIds() {
- return parentIds;
- }
-
- /**
- * @return the commit message
- */
- public String getMessage() {
- decode();
- return message;
- }
-
- /**
- * Set the parents of this commit
- * @param parentIds
- */
- public void setParentIds(ObjectId[] parentIds) {
- this.parentIds = new ObjectId[parentIds.length];
- for (int i=0; i<parentIds.length; ++i)
- this.parentIds[i] = parentIds[i];
- }
-
- private void decode() {
- // FIXME: handle I/O errors
- if (raw != null) {
- try {
- DataInputStream br = new DataInputStream(new ByteArrayInputStream(raw));
- String n = br.readLine();
- if (n == null || !n.startsWith("tree ")) {
- throw new CorruptObjectException(commitId, "no tree");
- }
- while ((n = br.readLine()) != null && n.startsWith("parent ")) {
- // empty body
- }
- if (n == null || !n.startsWith("author ")) {
- throw new CorruptObjectException(commitId, "no author");
- }
- String rawAuthor = n.substring("author ".length());
- n = br.readLine();
- if (n == null || !n.startsWith("committer ")) {
- throw new CorruptObjectException(commitId, "no committer");
- }
- String rawCommitter = n.substring("committer ".length());
- n = br.readLine();
- if (n != null && n.startsWith( "encoding"))
- encoding = Charset.forName(n.substring("encoding ".length()));
- else
- if (n == null || !n.equals("")) {
- throw new CorruptObjectException(commitId,
- "malformed header:"+n);
- }
- byte[] readBuf = new byte[br.available()]; // in-memory stream so this is all bytes left
- br.read(readBuf);
- int msgstart = readBuf.length != 0 ? ( readBuf[0] == '\n' ? 1 : 0 ) : 0;
-
- // If encoding is not specified, the default for commit is UTF-8
- if (encoding == null) encoding = Constants.CHARSET;
-
- // TODO: this isn't reliable so we need to guess the encoding from the actual content
- author = new PersonIdent(new String(rawAuthor.getBytes(),encoding.name()));
- committer = new PersonIdent(new String(rawCommitter.getBytes(),encoding.name()));
- message = new String(readBuf,msgstart, readBuf.length-msgstart, encoding.name());
- } catch (IOException e) {
- e.printStackTrace();
- } finally {
- raw = null;
- }
- }
- }
-
- /**
- * Set the commit message
- *
- * @param m the commit message
- */
- public void setMessage(final String m) {
- message = m;
- }
-
- /**
- * Persist this commit object
- *
- * @throws IOException
- */
- public void commit() throws IOException {
- if (getCommitId() != null)
- throw new IllegalStateException("exists " + getCommitId());
- setCommitId(new ObjectWriter(objdb).writeCommit(this));
- }
-
- public String toString() {
- return "Commit[" + ObjectId.toString(getCommitId()) + " " + getAuthor() + "]";
- }
-
- /**
- * State the encoding for the commit information
- *
- * @param e
- * the encoding. See {@link Charset}
- */
- public void setEncoding(String e) {
- encoding = Charset.forName(e);
- }
-
- /**
- * State the encoding for the commit information
- *
- * @param e
- * the encoding. See {@link Charset}
- */
- public void setEncoding(Charset e) {
- encoding = e;
- }
-
- /**
- * @return the encoding used. See {@link Charset}
- */
- public String getEncoding() {
- if (encoding != null)
- return encoding.name();
- else
- return null;
- }
- }
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