de.flapdoodle.embedmongo.extract.TgzExtractor.java Source code

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Here is the source code for de.flapdoodle.embedmongo.extract.TgzExtractor.java

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/**
 * Copyright (C) 2011
 *   Michael Mosmann <michael@mosmann.de>
 *   Martin Jhren <m.joehren@googlemail.com>
 *
 * 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 de.flapdoodle.embedmongo.extract;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.regex.Pattern;

import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
import org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream;

import de.flapdoodle.embedmongo.Files;
import de.flapdoodle.embedmongo.config.RuntimeConfig;
import de.flapdoodle.embedmongo.output.IProgressListener;

public class TgzExtractor implements IExtractor {

    @Override
    public void extract(RuntimeConfig runtime, File source, File destination, Pattern file) throws IOException {

        IProgressListener progressListener = runtime.getProgressListener();
        String progressLabel = "Extract " + source;
        progressListener.start(progressLabel);

        FileInputStream fin = new FileInputStream(source);
        BufferedInputStream in = new BufferedInputStream(fin);
        GzipCompressorInputStream gzIn = new GzipCompressorInputStream(in);

        TarArchiveInputStream tarIn = new TarArchiveInputStream(gzIn);
        try {
            TarArchiveEntry entry;
            while ((entry = tarIn.getNextTarEntry()) != null) {
                if (file.matcher(entry.getName()).matches()) {
                    //               System.out.println("File: " + entry.getName());
                    if (tarIn.canReadEntryData(entry)) {
                        //                  System.out.println("Can Read: " + entry.getName());
                        long size = entry.getSize();
                        Files.write(tarIn, size, destination);
                        destination.setExecutable(true);
                        //                  System.out.println("DONE");
                        progressListener.done(progressLabel);
                    }
                    break;

                } else {
                    //               System.out.println("SKIP File: " + entry.getName());
                }
            }

        } finally {
            tarIn.close();
            gzIn.close();
        }
    }
}