Example usage for java.util.zip GZIPOutputStream GZIPOutputStream

Introduction

In this page you can find the example usage for java.util.zip GZIPOutputStream GZIPOutputStream.

Prototype

public GZIPOutputStream(OutputStream out) throws IOException 

Source Link

Document

Creates a new output stream with a default buffer size.

Usage

From source file:com.chenshu.compress.CompressOldTest.java

@Benchmark
public int jdkGzip2Compress() {
    ByteArrayInputStream bin = null;
    ByteArrayOutputStream bout = null;
    GZIPOutputStream gzout = null;
    try {//from w  ww.  j  a v  a 2 s.com
        bin = new ByteArrayInputStream(data);
        bout = new ByteArrayOutputStream(data.length);
        gzout = new GZIPOutputStream(bout) {
            {
                def.setLevel(level);
            }
        };
        int count;
        byte ret[] = new byte[1024];
        while ((count = bin.read(ret, 0, 1024)) != -1) {
            gzout.write(ret, 0, count);
        }
        gzout.finish();
        gzout.flush();
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if (gzout != null) {
            try {
                gzout.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        if (bout != null) {
            try {
                bout.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    byte[] bs = bout.toByteArray();
    return bs.length;
}

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From source file:com.iflytek.spider.util.GZIPUtils.java

/**
 * Returns an gzipped copy of the input array.
 *//*from w  w w . jav  a  2s .  c  o  m*/
public static final byte[] zip(byte[] in) {
    try {
        // compress using GZIPOutputStream 
        ByteArrayOutputStream byteOut = new ByteArrayOutputStream(in.length / EXPECTED_COMPRESSION_RATIO);

        GZIPOutputStream outStream = new GZIPOutputStream(byteOut);

        try {
            outStream.write(in);
        } catch (Exception e) {
            e.printStackTrace(LogUtil.getWarnStream(LOG));
        }

        try {
            outStream.close();
        } catch (IOException e) {
            e.printStackTrace(LogUtil.getWarnStream(LOG));
        }

        return byteOut.toByteArray();

    } catch (IOException e) {
        e.printStackTrace(LogUtil.getWarnStream(LOG));
        return null;
    }
}

---

From source file:com.eryansky.common.web.utils.WebUtils.java

/**
 * Gzip HeaderGZIPOutputStream.//from   w  ww.ja v a2s  .c  o m
 */
public static OutputStream buildGzipOutputStream(HttpServletResponse response) throws IOException {
    response.setHeader("Content-Encoding", "gzip");
    response.setHeader("Vary", "Accept-Encoding");
    return new GZIPOutputStream(response.getOutputStream());
}

---

From source file:com.faceye.feature.util.http.GZIPUtils.java

/**
 * Returns an gzipped copy of the input array.
 *//*  ww  w.  j a  v a2 s. co m*/
public static final byte[] zip(byte[] in) {
    try {
        // compress using GZIPOutputStream 
        ByteArrayOutputStream byteOut = new ByteArrayOutputStream(in.length / EXPECTED_COMPRESSION_RATIO);

        GZIPOutputStream outStream = new GZIPOutputStream(byteOut);

        try {
            outStream.write(in);
        } catch (Exception e) {
            LOG.error("Error writing outStream: ", e);
        }

        try {
            outStream.close();
        } catch (IOException e) {
            LOG.error("Error closing outStream: ", e);
        }

        return byteOut.toByteArray();

    } catch (IOException e) {
        LOG.error("Error: ", e);
        return null;
    }
}

---

From source file:de.tudarmstadt.ukp.dkpro.tc.mallet.util.MalletUtils.java

public static void writeFeatureValuesToFile(String featureValues[], String outcome, File outputFile)
        throws IOException {
    BufferedWriter bw = new BufferedWriter(
            new OutputStreamWriter(new GZIPOutputStream(new FileOutputStream(outputFile, true)), "UTF-8"));
    bw.write("\n");
    for (String featureValue : featureValues) {
        bw.write(featureValue + " ");
    }/*from   w w w  .j a  v a2s  .c om*/
    bw.write(outcome);
    bw.flush();
    bw.close();
}

---

From source file:com.pinterest.terrapin.zookeeper.ViewInfoTest.java

@Test
public void testCompressedSerialization() throws Exception {
    // Check that compressed json serialization works correctly.
    byte[] compressedJson = viewInfo.toCompressedJson();
    GZIPInputStream zipIn = new GZIPInputStream(new ByteArrayInputStream(compressedJson));
    assertEquals(JSON, new String(IOUtils.toByteArray(zipIn)));

    // Check that compressed json deserialization works correctly.
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    GZIPOutputStream zipOut = new GZIPOutputStream(out);
    zipOut.write(JSON.getBytes());/*from  w ww.j a  v  a2  s.com*/
    zipOut.close();
    assertEquals(viewInfo, ViewInfo.fromCompressedJson(out.toByteArray()));
}

---

From source file:nl.opengeogroep.filesetsync.client.SyncJobState.java

public static void writeCachedFileList(String name, List<FileRecord> fileList) throws IOException {
    try (GZIPOutputStream gzOut = new GZIPOutputStream(new FileOutputStream(getFileListCacheFile(name)));
            BufferedFileListEncoder encoder = new BufferedFileListEncoder(gzOut)) {
        for (FileRecord fr : fileList) {
            encoder.write(fr);//  w w  w  .  j a  va  2  s  . c o  m
        }
    }
}

---

From source file:org.opendatakit.common.utils.WebUtils.java

/**
 * Safely encode a string for use as a query parameter.
 * /*from   w  w w  .  jav a2  s .  c  o m*/
 * @param rawString
 * @return encoded string
 */
public static String safeEncode(String rawString) {
    if (rawString == null || rawString.length() == 0) {
        return null;
    }

    try {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        GZIPOutputStream gzip = new GZIPOutputStream(out);
        gzip.write(rawString.getBytes(CharEncoding.UTF_8));
        gzip.finish();
        gzip.close();
        String candidate = Base64.encodeBase64URLSafeString(out.toByteArray());
        return candidate;
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
        throw new IllegalArgumentException("Unexpected failure: " + e.toString());
    } catch (IOException e) {
        e.printStackTrace();
        throw new IllegalArgumentException("Unexpected failure: " + e.toString());
    }
}

---

From source file:edu.umd.umiacs.clip.tools.io.GZIPFiles.java

protected static Path write(Path path, Iterable<? extends CharSequence> lines, Charset cs,
        OpenOption... options) throws IOException {
    Objects.requireNonNull(lines);
    OutputStream out = newOutputStream(path, options);
    try (BufferedWriter writer = new BufferedWriter(
            new OutputStreamWriter(new GZIPOutputStream(out), UTF_8.newEncoder().onMalformedInput(IGNORE)),
            BUFFER_SIZE)) {/*from w w  w . j  a  va  2 s  .c  o m*/
        for (CharSequence line : lines) {
            writer.append(line);
            writer.newLine();
        }
    }
    return path;
}

---

From source file:edu.cornell.med.icb.goby.modes.VcfToTabMode.java

/**
 * Combine tab delimited files and adjusts P-values for multiple testing.
 *
 * @throws java.io.IOException error reading / writing
 *//*from   ww w.j ava  2s  . co m*/
@Override
public void execute() throws IOException {
    Writer stream = null;
    try {
        stream = outputFilename == null ? new OutputStreamWriter(System.out)
                : outputFilename.endsWith(".gz")
                        ? new OutputStreamWriter(new GZIPOutputStream(new FileOutputStream(outputFilename)))
                        : new FileWriter(outputFilename);
        // start with an array of size 1M. This improves loading time for large datasets.

        for (String filename : inputFiles) {
            System.out.printf("Converting %s%n", filename);
            VCFParser parser = new VCFParser(filename);
            try {
                parser.readHeader();
                IntSet selectedInfoFieldGlobalIndices = new IntArraySet();
                IntSet selectedFormatFieldGlobalIndices = new IntArraySet();
                ColumnInfo infoColumn = parser.getColumns().find("INFO");
                ColumnInfo formatColumn = parser.getColumns().find("FORMAT");
                selectDefaultFields(infoColumn, formatColumn);
                // find the global field indices for the INFO fields we need to load:

                for (String selectedFieldName : selectedInfoFieldIds) {

                    if (infoColumn == null) {
                        System.err.printf("Could not find INFO column in file %s.", filename);
                        System.exit(1);
                    }
                    ColumnField selectedField = infoColumn.fields.find(selectedFieldName);

                    if (selectedField == null) {
                        System.err.printf("Could not find selection column %s in file %s.", selectedFieldName,
                                filename);
                        System.exit(1);
                    }

                    stream.write(selectedFieldName);
                    stream.write("\t");
                    selectedInfoFieldGlobalIndices.add(selectedField.globalFieldIndex);
                }
                // setup global field indices for selected FORMAT fields
                String samples[] = parser.getColumnNamesUsingFormat();
                if (formatColumn == null) {
                    System.err.printf("Could not find FORMAT column in file %s.", filename);
                    System.exit(1);
                }

                for (String sample : samples) {
                    for (String selectedGenotypeField : selectedFormatFieldIds) {
                        final String selectedFieldName = String.format("%s[%s]", sample, selectedGenotypeField);
                        final int selectedFieldIndex = parser.getGlobalFieldIndex(sample,
                                selectedGenotypeField);
                        stream.write(selectedFieldName);
                        stream.write("\t");
                        selectedFormatFieldGlobalIndices.add(selectedFieldIndex);
                    }
                }
                stream.write("\n");
                ProgressLogger pg = new ProgressLogger(LOG);
                /**
                 * This will hold global field indices for either INFO or FORMAT fields:
                 */
                IntSet selectedCombinedFieldGlobalIndices = new IntArraySet();
                selectedCombinedFieldGlobalIndices.addAll(selectedInfoFieldGlobalIndices);
                selectedCombinedFieldGlobalIndices.addAll(selectedFormatFieldGlobalIndices);
                pg.priority = org.apache.log4j.Level.INFO;
                pg.itemsName = "line";
                pg.displayFreeMemory = true;
                pg.start();
                while (parser.hasNextDataLine()) {
                    int i = 0;
                    for (final int globalFieldIndex : selectedCombinedFieldGlobalIndices) {

                        final String stringFieldValue = parser.getStringFieldValue(globalFieldIndex);
                        stream.write(stringFieldValue);
                        if (i++ < selectedCombinedFieldGlobalIndices.size()) {
                            stream.write("\t");
                        }
                    }

                    stream.write("\n");
                    parser.next();
                }
            } catch (VCFParser.SyntaxException e) {
                System.err.println(
                        "A syntax error was encountered when parsing input file. Details may be provided below. "
                                + filename);
                e.printStackTrace();
            }
        }
    } finally {
        if (outputFilename != null) {
            IOUtils.closeQuietly(stream);
        }
    }
}

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