com.google.gerrit.server.patch.PatchSetInfoFactory.java Source code

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Here is the source code for com.google.gerrit.server.patch.PatchSetInfoFactory.java

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// Copyright (C) 2009 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.server.patch;

import com.google.gerrit.reviewdb.client.Account;
import com.google.gerrit.reviewdb.client.Change;
import com.google.gerrit.reviewdb.client.PatchSet;
import com.google.gerrit.reviewdb.client.PatchSetInfo;
import com.google.gerrit.reviewdb.client.RevId;
import com.google.gerrit.reviewdb.client.UserIdentity;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.server.account.AccountByEmailCache;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.Singleton;

import org.eclipse.jgit.errors.MissingObjectException;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.PersonIdent;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;

import java.io.IOException;
import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;

/**
 * Factory class creating PatchSetInfo from meta-data found in Git repository.
 */
@Singleton
public class PatchSetInfoFactory {
    private final GitRepositoryManager repoManager;
    private final AccountByEmailCache byEmailCache;

    @Inject
    public PatchSetInfoFactory(final GitRepositoryManager grm, final AccountByEmailCache byEmailCache) {
        this.repoManager = grm;
        this.byEmailCache = byEmailCache;
    }

    public PatchSetInfo get(RevCommit src, PatchSet.Id psi) {
        PatchSetInfo info = new PatchSetInfo(psi);
        info.setSubject(src.getShortMessage());
        info.setMessage(src.getFullMessage());
        info.setAuthor(toUserIdentity(src.getAuthorIdent()));
        info.setCommitter(toUserIdentity(src.getCommitterIdent()));
        info.setRevId(src.getName());
        return info;
    }

    public PatchSetInfo get(ReviewDb db, PatchSet.Id patchSetId) throws PatchSetInfoNotAvailableException {
        try {
            final PatchSet patchSet = db.patchSets().get(patchSetId);
            final Change change = db.changes().get(patchSet.getId().getParentKey());
            return get(change, patchSet);
        } catch (OrmException e) {
            throw new PatchSetInfoNotAvailableException(e);
        }
    }

    public PatchSetInfo get(Change change, PatchSet patchSet) throws PatchSetInfoNotAvailableException {
        try (Repository repo = repoManager.openRepository(change.getProject()); RevWalk rw = new RevWalk(repo)) {
            final RevCommit src = rw.parseCommit(ObjectId.fromString(patchSet.getRevision().get()));
            PatchSetInfo info = get(src, patchSet.getId());
            info.setParents(toParentInfos(src.getParents(), rw));
            return info;
        } catch (IOException e) {
            throw new PatchSetInfoNotAvailableException(e);
        }
    }

    private UserIdentity toUserIdentity(final PersonIdent who) {
        final UserIdentity u = new UserIdentity();
        u.setName(who.getName());
        u.setEmail(who.getEmailAddress());
        u.setDate(new Timestamp(who.getWhen().getTime()));
        u.setTimeZone(who.getTimeZoneOffset());

        // If only one account has access to this email address, select it
        // as the identity of the user.
        //
        final Set<Account.Id> a = byEmailCache.get(u.getEmail());
        if (a.size() == 1) {
            u.setAccount(a.iterator().next());
        }

        return u;
    }

    private List<PatchSetInfo.ParentInfo> toParentInfos(final RevCommit[] parents, final RevWalk walk)
            throws IOException, MissingObjectException {
        List<PatchSetInfo.ParentInfo> pInfos = new ArrayList<>(parents.length);
        for (RevCommit parent : parents) {
            walk.parseBody(parent);
            RevId rev = new RevId(parent.getId().name());
            String msg = parent.getShortMessage();
            pInfos.add(new PatchSetInfo.ParentInfo(rev, msg));
        }
        return pInfos;
    }

}