com.googlesource.gerrit.plugins.manifest.GitFile.java Source code

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Here is the source code for com.googlesource.gerrit.plugins.manifest.GitFile.java

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// Copyright (C) 2015 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.googlesource.gerrit.plugins.manifest;

import com.google.gerrit.reviewdb.client.Branch;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.git.MetaDataUpdate;
import com.google.gerrit.server.git.VersionedMetaData;

import com.google.gerrit.server.project.NoSuchProjectException;
import com.google.inject.Inject;
import com.google.inject.assistedinject.Assisted;
import org.eclipse.jgit.errors.ConfigInvalidException;
import org.eclipse.jgit.lib.CommitBuilder;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;

import java.io.IOException;

/**
 * A GitFile is a text file (UTF8) from a git repository
 */
public class GitFile extends VersionedMetaData {
    public interface Factory {
        GitFile create(@Assisted Branch.NameKey branch, @Assisted String file);
    }

    private MetaDataUpdate.User metaDataUpdateFactory;
    private GitRepositoryManager repos;
    private Branch.NameKey branch;
    private String file;

    public String text;

    @Inject
    public GitFile(MetaDataUpdate.User metaDataUpdateFactory, GitRepositoryManager repos,
            @Assisted Branch.NameKey branch, @Assisted String file) {
        this.metaDataUpdateFactory = metaDataUpdateFactory;
        this.repos = repos;
        this.branch = branch;
        this.file = file;
    }

    public String read() throws ConfigInvalidException, IOException {
        Repository repo = repos.openRepository(branch.getParentKey());
        try {
            load(repo);
            return text;
        } finally {
            repo.close();
        }
    }

    public RevCommit write(String fileContent, String commitMessage)
            throws ConfigInvalidException, IOException, NoSuchProjectException {
        MetaDataUpdate md = metaDataUpdateFactory.create(branch.getParentKey());
        try {
            load(md);
            text = fileContent;
            md.getCommitBuilder().setCommitter(metaDataUpdateFactory.getUserPersonIdent());
            md.setMessage(commitMessage);
            return commit(md);
        } finally {
            md.close();
        }
    }

    public void setBranch(Branch.NameKey branch) {
        this.branch = branch;
    }

    public void setFileName(String fileName) {
        this.file = fileName;
    }

    @Override
    protected String getRefName() {
        return branch.get();
    }

    @Override
    protected void onLoad() throws IOException {
        text = readUTF8(file);
    }

    @Override
    protected boolean onSave(CommitBuilder commit) throws IOException {
        saveUTF8(file, text);
        return true;
    }
}