com.google.gerrit.server.query.change.MessagePredicate.java Source code

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Here is the source code for com.google.gerrit.server.query.change.MessagePredicate.java

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// 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.server.query.change;

import com.google.gerrit.reviewdb.Change;
import com.google.gerrit.reviewdb.PatchSet;
import com.google.gerrit.reviewdb.Project;
import com.google.gerrit.reviewdb.RevId;
import com.google.gerrit.reviewdb.ReviewDb;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.query.OperatorPredicate;
import com.google.gwtorm.client.OrmException;
import com.google.inject.Provider;

import org.eclipse.jgit.errors.IncorrectObjectTypeException;
import org.eclipse.jgit.errors.MissingObjectException;
import org.eclipse.jgit.errors.RepositoryNotFoundException;
import org.eclipse.jgit.lib.AnyObjectId;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.revwalk.filter.MessageRevFilter;
import org.eclipse.jgit.revwalk.filter.RevFilter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;

/**
 * Predicate to match changes that contains specified text in commit messages
 * body.
 */
public class MessagePredicate extends OperatorPredicate<ChangeData> {

    private static final Logger log = LoggerFactory.getLogger(MessagePredicate.class);

    private final Provider<ReviewDb> db;
    private final GitRepositoryManager repoManager;
    private final RevFilter rFilter;

    public MessagePredicate(Provider<ReviewDb> db, GitRepositoryManager repoManager, String text) {
        super(ChangeQueryBuilder.FIELD_MESSAGE, text);
        this.db = db;
        this.repoManager = repoManager;
        this.rFilter = MessageRevFilter.create(text);
    }

    @Override
    public boolean match(ChangeData object) throws OrmException {
        final PatchSet patchSet = object.currentPatchSet(db);

        if (patchSet == null) {
            return false;
        }

        final RevId revision = patchSet.getRevision();

        if (revision == null) {
            return false;
        }

        final AnyObjectId objectId = ObjectId.fromString(revision.get());

        if (objectId == null) {
            return false;
        }

        final Change change = object.change(db);

        if (change == null) {
            return false;
        }

        final Project.NameKey projectName = change.getProject();

        if (projectName == null) {
            return false;
        }

        try {
            final Repository repo = repoManager.openRepository(projectName);
            try {
                final RevWalk rw = new RevWalk(repo);
                try {
                    return rFilter.include(rw, rw.parseCommit(objectId));
                } finally {
                    rw.release();
                }
            } finally {
                repo.close();
            }
        } catch (RepositoryNotFoundException e) {
            log.error("Repository \"" + projectName.get() + "\" unknown.", e);
        } catch (MissingObjectException e) {
            log.error(projectName.get() + "\" commit does not exist.", e);
        } catch (IncorrectObjectTypeException e) {
            log.error(projectName.get() + "\" revision is not a commit.", e);
        } catch (IOException e) {
            log.error("Could not search for commit message in \"" + projectName.get() + "\" repository.", e);
        }

        return false;
    }

    @Override
    public int getCost() {
        return 1;
    }
}