com.bacoder.scmtools.git.internal.CloneAndProcessDirCacheCheckout.java Source code

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Here is the source code for com.bacoder.scmtools.git.internal.CloneAndProcessDirCacheCheckout.java

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/**
 * Copyright 2013 Huining (Thomas) Feng (tfeng@berkeley.edu)
 *
 * 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.bacoder.scmtools.git.internal;

import java.io.IOException;
import java.util.Collections;
import java.util.List;
import java.util.Map;

import org.eclipse.jgit.dircache.DirCache;
import org.eclipse.jgit.dircache.DirCacheCheckout;
import org.eclipse.jgit.dircache.DirCacheEntry;
import org.eclipse.jgit.errors.IndexWriteException;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.FileMode;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectLoader;
import org.eclipse.jgit.lib.ObjectReader;
import org.eclipse.jgit.lib.Repository;

import com.bacoder.scmtools.core.InternalRuntimeException;
import com.bacoder.scmtools.git.GitEntry;
import com.bacoder.scmtools.git.GitEntryProcessor;
import com.google.common.collect.Lists;

class CloneAndProcessDirCacheCheckout extends DirCacheCheckout {

    private DirCache dirCache;
    private String pathPrefix;
    private GitEntryProcessor processor;
    private Repository repository;
    private byte[] submodulesConfig;

    public CloneAndProcessDirCacheCheckout(Repository repository, DirCache dirCache, ObjectId mergeCommitTree,
            String pathPrefix) throws IOException {
        super(repository, dirCache, mergeCommitTree);
        this.repository = repository;
        this.dirCache = dirCache;
        this.pathPrefix = pathPrefix;
    }

    public byte[] getSubmodulesConfig() {
        return submodulesConfig;
    }

    public void setProcessor(GitEntryProcessor processor) {
        this.processor = processor;
    }

    @Override
    protected boolean checkoutEntries() throws IOException {
        Map<String, ObjectId> updated = getUpdated();
        List<String> paths = Lists.newArrayList(updated.keySet());
        Collections.sort(paths);

        ObjectReader objectReader = repository.getObjectDatabase().newReader();
        try {
            for (String path : paths) {
                DirCacheEntry entry = dirCache.getEntry(path);
                if (FileMode.GITLINK.equals(entry.getRawMode()))
                    continue;

                boolean isSubmoduleConfig = path.equals(Constants.DOT_GIT_MODULES);
                ObjectId objectId = updated.get(path);
                if (isSubmoduleConfig) {
                    ObjectLoader loader = objectReader.open(objectId);
                    byte[] data = loader.getBytes();
                    submodulesConfig = data;
                }
                if (processor != null) {
                    GitEntry gitEntry = new GitEntry(repository, objectId, pathPrefix, path);
                    try {
                        processor.process(gitEntry);
                    } catch (Exception e) {
                        throw new InternalRuntimeException(e);
                    }
                }
            }
            // commit the index builder - a new index is persisted
            if (!getBuilder().commit())
                throw new IndexWriteException();
        } finally {
            objectReader.release();
        }
        return true;
    }
}