org.jclouds.docker.compute.features.internal.Archives.java Source code

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Here is the source code for org.jclouds.docker.compute.features.internal.Archives.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.jclouds.docker.compute.features.internal;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.collect.Iterables.getLast;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
import org.apache.commons.compress.archivers.tar.TarArchiveOutputStream;

import com.google.common.base.Splitter;

/**
 * @author Andrea Turli
 */
public class Archives {

    public static File tar(File baseDir, String archivePath) throws IOException {
        // Check that the directory is a directory, and get its contents
        checkArgument(baseDir.isDirectory(), "%s is not a directory", baseDir);
        File[] files = baseDir.listFiles();
        File tarFile = new File(archivePath);

        String token = getLast(Splitter.on("/").split(archivePath.substring(0, archivePath.lastIndexOf("/"))));

        byte[] buf = new byte[1024];
        int len;
        TarArchiveOutputStream tos = new TarArchiveOutputStream(new FileOutputStream(tarFile));
        tos.setLongFileMode(TarArchiveOutputStream.LONGFILE_GNU);
        for (File file : files) {
            TarArchiveEntry tarEntry = new TarArchiveEntry(file);
            tarEntry.setName("/" + getLast(Splitter.on(token).split(file.toString())));
            tos.putArchiveEntry(tarEntry);
            if (!file.isDirectory()) {
                FileInputStream fin = new FileInputStream(file);
                BufferedInputStream in = new BufferedInputStream(fin);
                while ((len = in.read(buf)) != -1) {
                    tos.write(buf, 0, len);
                }
                in.close();
            }
            tos.closeArchiveEntry();
        }
        tos.close();
        return tarFile;
    }

    public static File tar(File baseDir, File tarFile) throws IOException {
        // Check that the directory is a directory, and get its contents
        checkArgument(baseDir.isDirectory(), "%s is not a directory", baseDir);
        File[] files = baseDir.listFiles();

        String token = getLast(Splitter.on("/").split(baseDir.getAbsolutePath()));

        byte[] buf = new byte[1024];
        int len;
        TarArchiveOutputStream tos = new TarArchiveOutputStream(new FileOutputStream(tarFile));
        tos.setLongFileMode(TarArchiveOutputStream.LONGFILE_GNU);
        for (File file : files) {
            TarArchiveEntry tarEntry = new TarArchiveEntry(file);
            tarEntry.setName("/" + getLast(Splitter.on(token).split(file.toString())));
            tos.putArchiveEntry(tarEntry);
            if (!file.isDirectory()) {
                FileInputStream fin = new FileInputStream(file);
                BufferedInputStream in = new BufferedInputStream(fin);
                while ((len = in.read(buf)) != -1) {
                    tos.write(buf, 0, len);
                }
                in.close();
            }
            tos.closeArchiveEntry();
        }
        tos.close();
        return tarFile;
    }

}