com.b2international.snowowl.datastore.request.BranchRebaseRequest.java Source code

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Here is the source code for com.b2international.snowowl.datastore.request.BranchRebaseRequest.java

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/*
 * Copyright 2011-2016 B2i Healthcare Pte Ltd, http://b2i.sg
 * 
 * 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.b2international.snowowl.datastore.request;

import java.util.UUID;

import com.b2international.snowowl.core.branch.Branch;
import com.b2international.snowowl.core.domain.RepositoryContext;
import com.b2international.snowowl.core.merge.Merge;
import com.b2international.snowowl.core.merge.MergeService;
import com.google.common.base.Strings;

/**
 * Rebases {@code target} on {@code source}.
 * <p>
 * The branch represented by {@code target} is not modified; instead, a new branch representing the rebased {@code target} will be created on top of
 * {@code source}, preserving {@code target}'s path. This ensures that any changes that were made to {@code source} in the meantime will be visible on
 * the rebased target branch.
 * <p>
 * Commits available on the previous instance of {@code target}, if present, will also be visible on the resulting {@link Branch} after a successful
 * rebase.
 *
 * @since 4.6
 */
public final class BranchRebaseRequest extends AbstractBranchChangeRequest<Merge> {

    private static final long serialVersionUID = 1L;

    private static String commitMessageOrDefault(final String sourcePath, final String targetPath,
            final String commitMessage) {
        return !Strings.isNullOrEmpty(commitMessage) ? commitMessage
                : String.format("Rebase branch '%s' on '%s'", targetPath, sourcePath);
    }

    BranchRebaseRequest(UUID id, final String sourcePath, final String targetPath, final String userId,
            final String commitMessage, String reviewId, String parentLockContext) {
        super(id, sourcePath, targetPath, userId, commitMessageOrDefault(sourcePath, targetPath, commitMessage),
                reviewId, parentLockContext);
    }

    @Override
    protected Merge execute(RepositoryContext context, Branch source, Branch target) {
        return context.service(MergeService.class).enqueue(id, sourcePath, targetPath, userId, commitMessage,
                reviewId, parentLockContext);
    }
}