com.foreignreader.util.WordNetExtractor.java Source code

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Here is the source code for com.foreignreader.util.WordNetExtractor.java

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/*******************************************************************************
 * Copyright 2013 Vitaliy Yakovchuk
 * 
 * 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.foreignreader.util;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;

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 android.os.AsyncTask;

/**
 * 
 * 
 * 
 * @author Vitaliy Yakovchuk
 * 
 */

public class WordNetExtractor extends AsyncTask<InputStream, Void, Void> {

    @Override
    protected Void doInBackground(InputStream... streams) {
        assert streams.length == 1;

        try {

            BufferedInputStream in = new BufferedInputStream(streams[0]);
            GzipCompressorInputStream gzIn = new GzipCompressorInputStream(in);

            TarArchiveInputStream tar = new TarArchiveInputStream(gzIn);

            TarArchiveEntry tarEntry;

            File dest = LongTranslationHelper.getWordNetDict().getParentFile();

            while ((tarEntry = tar.getNextTarEntry()) != null) {
                File destPath = new File(dest, tarEntry.getName());
                if (tarEntry.isDirectory()) {
                    destPath.mkdirs();
                } else {
                    destPath.createNewFile();
                    byte[] btoRead = new byte[1024 * 10];

                    BufferedOutputStream bout = new BufferedOutputStream(new FileOutputStream(destPath));
                    int len = 0;

                    while ((len = tar.read(btoRead)) != -1) {
                        bout.write(btoRead, 0, len);
                    }

                    bout.close();

                }
            }

            tar.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

        return null;
    }
}