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/*******************************************************************************
* Copyright (C) 2008, Robin Rosenberg <robin.rosenberg@dewire.com>
* Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*******************************************************************************/
package org.eclipse.egit.core.internal.storage;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Map;
import org.eclipse.core.internal.resources.ResourceException;
import org.eclipse.core.resources.IResourceStatus;
import org.eclipse.core.resources.IStorage;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.Path;
import org.eclipse.egit.core.GitTag;
import org.eclipse.team.core.history.IFileRevision;
import org.eclipse.team.core.history.ITag;
import org.eclipse.jgit.lib.AnyObjectId;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.PersonIdent;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.treewalk.TreeWalk;
/**
* An {@link IFileRevision} for a version of a specified resource in the
* specified commit (revision).
*/
class CommitFileRevision extends GitFileRevision {
private final Repository db;
private final RevCommit commit;
private final PersonIdent author;
private final String path;
private ObjectId blobId;
CommitFileRevision(final Repository repo, final RevCommit rc,
final String fileName) {
this(repo, rc, fileName, null);
}
CommitFileRevision(final Repository repo, final RevCommit rc,
final String fileName, final ObjectId blob) {
super(fileName);
db = repo;
commit = rc;
author = rc.getAuthorIdent();
path = fileName;
blobId = blob;
}
String getGitPath() {
return path;
}
public IStorage getStorage(final IProgressMonitor monitor)
throws CoreException {
if (blobId == null)
blobId = locateBlobObjectId();
return new BlobStorage(db, path, blobId);
}
public long getTimestamp() {
return author != null ? author.getWhen().getTime() : 0;
}
public String getContentIdentifier() {
return commit.getId().name();
}
public String getAuthor() {
return author != null ? author.getName() : null;
}
public String getComment() {
return commit.getShortMessage();
}
public String toString() {
return commit.getId() + ":" + path;
}
public ITag[] getTags() {
final Collection<GitTag> ret = new ArrayList<GitTag>();
for (final Map.Entry<String, Ref> tag : db.getTags().entrySet()) {
final ObjectId ref = tag.getValue().getPeeledObjectId();
if (ref == null)
continue;
if (!AnyObjectId.equals(ref, commit))
continue;
ret.add(new GitTag(tag.getKey()));
}
return ret.toArray(new ITag[ret.size()]);
}
/**
* Get the commit that introduced this file revision.
*
* @return the commit we most recently noticed this file in.
*/
public RevCommit getRevCommit() {
return commit;
}
private ObjectId locateBlobObjectId() throws CoreException {
try {
final TreeWalk w = TreeWalk.forPath(db, path, commit.getTree());
if (w == null)
throw new ResourceException(IResourceStatus.FAILED_READ_LOCAL,
Path.fromPortableString(path), "Path not in "
+ commit.getId() + ".", null);
return w.getObjectId(0);
} catch (IOException e) {
throw new ResourceException(IResourceStatus.FAILED_READ_LOCAL, Path
.fromPortableString(path), "IO error looking up path in "
+ commit.getId() + ".", e);
}
}
}
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