org.uberfire.java.nio.fs.jgit.util.commands.SimpleRefUpdateCommand.java Source code

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Here is the source code for org.uberfire.java.nio.fs.jgit.util.commands.SimpleRefUpdateCommand.java

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/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 *
 * 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 org.uberfire.java.nio.fs.jgit.util.commands;

import java.io.IOException;
import java.text.MessageFormat;

import org.eclipse.jgit.api.errors.ConcurrentRefUpdateException;
import org.eclipse.jgit.api.errors.JGitInternalException;
import org.eclipse.jgit.internal.JGitText;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.RefUpdate;
import org.eclipse.jgit.revwalk.RevCommit;
import org.uberfire.java.nio.fs.jgit.util.Git;

public class SimpleRefUpdateCommand {

    private final Git git;
    private final String name;
    private final RevCommit commit;

    public SimpleRefUpdateCommand(final Git git, final String branchName, final RevCommit commit) {
        this.git = git;
        this.name = branchName;
        this.commit = commit;
    }

    public void execute() throws IOException, ConcurrentRefUpdateException {
        final ObjectId headId = git.getLastCommit(Constants.R_HEADS + name);
        final RefUpdate ru = git.getRepository().updateRef(Constants.R_HEADS + name);
        if (headId == null) {
            ru.setExpectedOldObjectId(ObjectId.zeroId());
        } else {
            ru.setExpectedOldObjectId(headId);
        }
        ru.setNewObjectId(commit.getId());
        ru.setRefLogMessage(commit.getShortMessage(), false);
        forceUpdate(ru, commit.getId());
    }

    private void forceUpdate(final RefUpdate ru, final ObjectId id)
            throws java.io.IOException, ConcurrentRefUpdateException {
        final RefUpdate.Result rc = ru.forceUpdate();
        switch (rc) {
        case NEW:
        case FORCED:
        case FAST_FORWARD:
            break;
        case REJECTED:
        case LOCK_FAILURE:
            throw new ConcurrentRefUpdateException(JGitText.get().couldNotLockHEAD, ru.getRef(), rc);
        default:
            throw new JGitInternalException(
                    MessageFormat.format(JGitText.get().updatingRefFailed, Constants.HEAD, id.toString(), rc));
        }
    }
}