// Copyright (C) 2010 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.httpd.rpc.changedetail;
import com.google.gerrit.common.data.IncludedInDetail;
import com.google.gerrit.common.errors.InvalidRevisionException;
import com.google.gerrit.httpd.rpc.Handler;
import com.google.gerrit.reviewdb.client.Change;
import com.google.gerrit.reviewdb.client.PatchSet;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.project.ChangeControl;
import com.google.gerrit.server.project.NoSuchChangeException;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.assistedinject.Assisted;
import org.eclipse.jgit.errors.IncorrectObjectTypeException;
import org.eclipse.jgit.errors.MissingObjectException;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/** Creates a {@link IncludedInDetail} of a {@link Change}. */
class IncludedInDetailFactory extends Handler<IncludedInDetail> {
private static final Logger log =
LoggerFactory.getLogger(IncludedInDetailFactory.class);
interface Factory {
IncludedInDetailFactory create(Change.Id id);
}
private final ReviewDb db;
private final ChangeControl.Factory changeControlFactory;
private final GitRepositoryManager repoManager;
private final Change.Id changeId;
private IncludedInDetail detail;
private ChangeControl control;
@Inject
IncludedInDetailFactory(final ReviewDb db,
final ChangeControl.Factory changeControlFactory,
final GitRepositoryManager repoManager, @Assisted final Change.Id changeId) {
this.changeControlFactory = changeControlFactory;
this.repoManager = repoManager;
this.changeId = changeId;
this.db = db;
}
@Override
public IncludedInDetail call() throws OrmException, NoSuchChangeException,
IOException, InvalidRevisionException {
control = changeControlFactory.validateFor(changeId);
final PatchSet patch =
db.patchSets().get(control.getChange().currentPatchSetId());
final Repository repo =
repoManager.openRepository(control.getProject().getNameKey());
try {
final RevWalk rw = new RevWalk(repo);
try {
rw.setRetainBody(false);
final RevCommit rev;
try {
rev = rw.parseCommit(ObjectId.fromString(patch.getRevision().get()));
} catch (IncorrectObjectTypeException err) {
throw new InvalidRevisionException();
} catch (MissingObjectException err) {
throw new InvalidRevisionException();
}
detail = new IncludedInDetail();
detail.setBranches(includedIn(repo, rw, rev, Constants.R_HEADS));
detail.setTags(includedIn(repo, rw, rev, Constants.R_TAGS));
return detail;
} finally {
rw.release();
}
} finally {
repo.close();
}
}
private List<String> includedIn(final Repository repo, final RevWalk rw,
final RevCommit rev, final String namespace) throws IOException,
MissingObjectException, IncorrectObjectTypeException {
final List<String> result = new ArrayList<String>();
for (final Ref ref : repo.getRefDatabase().getRefs(namespace).values()) {
final RevCommit tip;
try {
tip = rw.parseCommit(ref.getObjectId());
} catch (IncorrectObjectTypeException notCommit) {
// Its OK for a tag reference to point to a blob or a tree, this
// is common in the Linux kernel or git.git repository.
//
continue;
} catch (MissingObjectException notHere) {
// Log the problem with this branch, but keep processing.
//
log.warn("Reference " + ref.getName() + " in " + repo.getDirectory()
+ " points to dangling object " + ref.getObjectId());
continue;
}
if (rw.isMergedInto(rev, tip)) {
result.add(ref.getName().substring(namespace.length()));
}
}
return result;
}
}