| /* |
| * 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; |
| } |
| } |