Example usage for java.util.zip Inflater setInput

Introduction

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

Prototype

public void setInput(byte[] input, int off, int len) 

Source Link

Document

Sets input data for decompression.

Usage

From source file:Main.java

private static byte[] expand(byte[] bytes, int skip) {
    byte[] newBytes = new byte[bytes.length - skip];
    Inflater inflater = new Inflater();

    inflater.setInput(bytes, skip, newBytes.length);
    try {//from  ww  w.j  a va 2 s  .  c  o m
        int outCount = inflater.inflate(newBytes);
        System.arraycopy(newBytes, 0, bytes, skip, outCount);
        Arrays.fill(bytes, skip + outCount, bytes.length, (byte) 0);
        return bytes;
    } catch (DataFormatException e) {
    }

    return null;
}

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From source file:Main.java

public static byte[] decompressInZlib(byte[] compressData, int offset, int length) throws Exception {

    Inflater decompresser = new Inflater();
    decompresser.setInput(compressData, 0, compressData.length);

    ByteArrayOutputStream bos = new ByteArrayOutputStream(length);

    int count;/*w  w  w.java2  s.  co  m*/
    byte[] buf = new byte[1024];
    while (!decompresser.finished()) {
        count = decompresser.inflate(buf);
        bos.write(buf, 0, count);
    }

    byte[] originalData = bos.toByteArray();
    decompresser.end();

    return originalData;
}

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From source file:Main.java

public static byte[] decompress(byte[] data, int off, int len) {

    byte[] output = null;

    Inflater decompresser = new Inflater();
    decompresser.reset();/*w w w  .  jav  a 2  s. c  o  m*/
    decompresser.setInput(data, off, len);

    ByteArrayOutputStream out = new ByteArrayOutputStream(data.length);
    try {
        byte[] result = new byte[1024];
        while (!decompresser.finished()) {
            int i = decompresser.inflate(result);
            out.write(result, 0, i);
        }
        output = out.toByteArray();
    } catch (Exception e) {
        throw new RuntimeException(e);
    } finally {
        try {
            out.close();
        } catch (Exception e) {
        }
        decompresser.end();
    }
    return output;
}

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From source file:Main.java

public static void decompress(byte[] data, int off, int len, OutputStream out) {
    Inflater decompresser = new Inflater();
    decompresser.reset();/*from w w  w .  j a v a 2 s.  c o  m*/
    decompresser.setInput(data, off, len);
    byte[] buf = new byte[1024];

    try {
        while (!decompresser.finished()) {
            int i = decompresser.inflate(buf);
            out.write(buf, 0, i);
            out.flush();
        }
    } catch (Exception ex) {
        throw new RuntimeException(ex);
    } finally {
        decompresser.end();
    }
}

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From source file:v7db.files.Compression.java

/**
 * assumes that the result buffer has exactly the needed size
 * //from w ww . j a v a  2  s . com
 * @throws DataFormatException
 */
static void inflate(byte[] data, int off, int len, byte[] out) throws DataFormatException {
    Inflater inflater = new Inflater(true);
    inflater.setInput(data, off, len);
    int size = inflater.inflate(out);
    if (size != out.length)
        throw new DataFormatException(
                "unexpected size of deflated data: " + size + " instead of " + out.length);
}

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From source file:Main.java

public static byte[] zlibDecompress(byte[] data, int offset, int length) {
    byte[] output = null;

    Inflater decompresser = new Inflater();
    decompresser.reset();/*w  w  w .  jav a  2  s  .co m*/
    try {
        decompresser.setInput(data, offset, length);
    } catch (Exception e) {
        return null;
    }

    ByteArrayOutputStream o = new ByteArrayOutputStream(data.length);
    try {
        byte[] buf = new byte[1024];
        while (!decompresser.finished()) {
            int i = decompresser.inflate(buf);
            o.write(buf, 0, i);
        }
        output = o.toByteArray();
    } catch (Exception e) {
        output = data;
        e.printStackTrace();
    } finally {
        try {
            o.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    decompresser.end();
    return output;
}

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From source file:Main.java

public static byte[] decompress(byte[] data, int off, int len) {
    byte[] output = null;
    Inflater decompresser = new Inflater();
    decompresser.reset();/*from  w  w w  .  j a  v  a  2 s .co m*/
    //      decompresser.setInput(data);
    decompresser.setInput(data, off, len);

    ByteArrayOutputStream o = new ByteArrayOutputStream(data.length);
    try {
        byte[] buf = new byte[1024];
        while (!decompresser.finished()) {
            int i = decompresser.inflate(buf);
            o.write(buf, 0, i);
        }
        output = o.toByteArray();
    } catch (Exception e) {
        throw new RuntimeException(e);
    } finally {
        try {
            o.close();
            decompresser.end();
        } catch (Exception e) {
        }
    }

    return output;
}

---

From source file:Main.java

public static byte[] decompress(byte[] data, int off, int len, int srcLen) {
    byte[] output = null;
    Inflater decompresser = new Inflater();
    decompresser.reset();/* ww w . j  a va  2  s .c o m*/
    //      decompresser.setInput(data);
    decompresser.setInput(data, off, len);

    ByteArrayOutputStream o = new ByteArrayOutputStream(srcLen);
    try {
        o.reset();
        byte[] buf = new byte[1024];
        while (!decompresser.finished()) {
            int i = decompresser.inflate(buf);
            o.write(buf, 0, i);
        }
        output = o.toByteArray();
    } catch (Exception e) {
        throw new RuntimeException(e);
    } finally {
        try {
            o.close();
            decompresser.end();
        } catch (Exception e) {
        }
    }

    return output;
}

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From source file:org.jahia.utils.Url.java

/**
 * Decode facet filter URL parameter/*from w ww.  j  a va  2 s.  c om*/
 * @param inputString enocded facet filter URL query parameter
 * @return decoded facet filter parameter
 */
public static String decodeUrlParam(String inputString) {
    if (StringUtils.isEmpty(inputString)) {
        return inputString;
    }
    byte[] input = Base64.decodeBase64(inputString);
    // Decompress the bytes
    Inflater decompresser = new Inflater();
    decompresser.setInput(input, 0, input.length);
    byte[] result = new byte[2048];
    String outputString = "";
    try {
        int resultlength = decompresser.inflate(result);
        decompresser.end();
        outputString = new String(result, 0, resultlength, "UTF-8");
    } catch (DataFormatException e) {
        logger.warn("Not able to decode facet URL: " + inputString, e);
    } catch (UnsupportedEncodingException e) {
        logger.warn("Not able to decode facet URL: " + inputString, e);
    }
    return outputString;
}

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From source file:Main.java

/**
 * <p>Decompresses a the content of a file from {@code startPosition} of {@code compressedSize}
 * and return the bytes of it. If a {@code compressedSize} can be provided if it is known
 * how large the decompressed content will be.</p>
 *
 * @param file             the file//  w  w w  . j  a v a 2  s .  co m
 * @param startPosition    the start position
 * @param compressedSize   the compresse
 * @param decompressedSize the decompressed size
 * @return the decompressed bytes
 * @throws IOException         if there was any io issues
 * @throws DataFormatException if there was an issue decompressing content
 */
public static byte[] decompress(File file, int startPosition, int compressedSize, int decompressedSize)
        throws IOException, DataFormatException {

    if (decompressedSize == 0) {
        return decompress(file, startPosition, compressedSize);
    }

    try (FileChannel fileChannel = FileChannel.open(file.toPath())) {
        ByteBuffer buffer = fileChannel.map(FileChannel.MapMode.READ_ONLY, startPosition, compressedSize);
        Inflater inflater = new Inflater();
        byte[] compressedBytes = new byte[compressedSize];
        byte[] bytes = new byte[decompressedSize];

        buffer.get(compressedBytes);
        inflater.setInput(compressedBytes, 0, compressedSize);
        inflater.inflate(bytes);
        inflater.end();

        return bytes;
    }
}

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