Example usage for java.io ByteArrayOutputStream reset

Introduction

In this page you can find the example usage for java.io ByteArrayOutputStream reset.

Prototype

public synchronized void reset() 

Source Link

Document

Resets the count field of this ByteArrayOutputStream to zero, so that all currently accumulated output in the output stream is discarded.

Usage

From source file:Main.java

public static byte[] compressBitmap(byte[] data, float size) {
    Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
    if (bitmap == null || getSizeOfBitmap(bitmap) <= size) {
        return data;
    }//from w  ww.j a v a2s .  c o m
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
    int quality = 100;
    while ((baos.toByteArray().length / 1024f) > size) {
        quality -= 5;
        baos.reset();
        if (quality <= 0) {
            break;
        }
        bitmap.compress(Bitmap.CompressFormat.JPEG, quality, baos);
    }
    byte[] byteData = baos.toByteArray();
    return byteData;
}

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From source file:Main.java

public static Bitmap compressImage(Bitmap image) {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    image.compress(Bitmap.CompressFormat.JPEG, 100, baos);
    int options = 100;
    while (baos.toByteArray().length / 1024 > 100) {
        options -= 10;/*from w w w  .j  a  va2s  . com*/
        if (options > 0) {
            baos.reset();
            image.compress(Bitmap.CompressFormat.JPEG, options, baos);
        }
    }
    ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());
    return BitmapFactory.decodeStream(isBm, null, null);
}

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From source file:Main.java

public static void compressFileIfNeeded(String filePath) {
    File f = new File(filePath);

    Bitmap bitmap;//from   w  ww .j  ava  2s  .c o m
    bitmap = BitmapFactory.decodeFile(filePath);
    int MAX_IMAGE_SIZE = 1000 * 1024;
    int streamLength = (int) f.length();
    if (streamLength > MAX_IMAGE_SIZE) {
        int compressQuality = 105;
        ByteArrayOutputStream bmpStream = new ByteArrayOutputStream();
        while (streamLength >= MAX_IMAGE_SIZE && compressQuality > 5) {
            try {
                bmpStream.flush();//to avoid out of memory error
                bmpStream.reset();
            } catch (IOException e) {
                e.printStackTrace();
            }
            compressQuality -= 5;
            bitmap.compress(Bitmap.CompressFormat.JPEG, compressQuality, bmpStream);
            byte[] bmpPicByteArray = bmpStream.toByteArray();
            streamLength = bmpPicByteArray.length;
            Log.d("test upload", "Quality: " + compressQuality);
            Log.d("test upload", "Size: " + streamLength);
        }

        FileOutputStream fo;

        try {
            f.delete();
            f = new File(filePath);
            fo = new FileOutputStream(f);
            fo.write(bmpStream.toByteArray());
            fo.flush();
            fo.close();
            ExifInterface exif = new ExifInterface(f.getAbsolutePath());
            exif.setAttribute(ExifInterface.TAG_ORIENTATION, "6");
            exif.saveAttributes();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

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From source file:net.seleucus.wsp.crypto.FwknopSymmetricCrypto.java

protected static byte[][] deriveKeyAndIV(byte[] salt, byte[] master_key)
        throws NoSuchAlgorithmException, IOException {

    byte[] key = new byte[KEY_LEN];
    byte[] IV = new byte[IV_LEN];

    MessageDigest md5 = MessageDigest.getInstance("MD5");

    ByteArrayOutputStream data = new ByteArrayOutputStream();
    ByteArrayOutputStream toHash = new ByteArrayOutputStream();
    byte[] d = null;

    while (data.size() < IV_LEN + KEY_LEN) {
        md5.reset();//from w ww  . j av  a2  s  . c om
        toHash.reset();
        if (d != null)
            toHash.write(d);
        toHash.write(master_key);
        toHash.write(salt);
        d = md5.digest(toHash.toByteArray());
        data.write(d);
    }

    byte[] output = data.toByteArray();

    System.arraycopy(output, 0, key, 0, KEY_LEN);
    System.arraycopy(output, KEY_LEN, IV, 0, IV_LEN);

    return new byte[][] { key, IV };
}

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From source file:Main.java

/**
 * @param maxSize unit kb/*from  ww w.j a va  2s. co  m*/
 */
public static boolean compressSizeToFile(Bitmap bitmap, int maxSize, File outFile) {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    int quality = 100;
    bitmap.compress(Bitmap.CompressFormat.JPEG, quality, baos);
    while (baos.toByteArray().length / 1024.0 > maxSize) {
        if (quality < 30) {
            break;
        }
        quality -= 20;
        baos.reset();
        bitmap.compress(Bitmap.CompressFormat.JPEG, quality, baos);
    }
    try {
        FileOutputStream fileOutputStream = new FileOutputStream(outFile);
        fileOutputStream.write(baos.toByteArray());
        fileOutputStream.close();
    } catch (Exception e) {
        return false;
    }
    return true;
}

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From source file:com.github.jinahya.codec.BossVsEngineerTestNanoTimeDecode.java

@BeforeClass
private static void warmUp() throws IOException {
    LOGGER.info("warmUp()");

    final ByteArrayOutputStream baos = new ByteArrayOutputStream();

    final long freeMemory = Runtime.getRuntime().freeMemory();
    LOGGER.log(Level.INFO, "Runtime.freeMemory: {0}", freeMemory);

    for (int i = 0; i < 16; i++) {
        baos.reset();
        while (baos.size() < 1048576L) {
            baos.write(Tests.decodedBytes());
        }/* w  ww .j  a v a  2  s.  c  o  m*/
        final byte[] decoded = baos.toByteArray();
        new HexEncoder().encodeLikeABoss(decoded);
        new HexEncoder().encodeLikeAnEngineer(decoded);
    }

    for (int i = 0; i < 16; i++) {
        baos.reset();
        while (baos.size() < 1048576L) {
            baos.write(Tests.encodedBytes());
        }
        final byte[] encoded = baos.toByteArray();
        new HexDecoder().decodeLikeABoss(encoded);
        new HexDecoder().decodeLikeAnEngineer(encoded);
    }

    for (int i = 0; i < 128; i++) {
        decodeLikeABoss(Tests.encodedBytes());
        decodeLikeAnEngineer(Tests.encodedBytes());
    }
}

---

From source file:com.github.jinahya.codec.BossVsEngineerTestNanoTimeEncode.java

@BeforeClass
private static void warmUp() throws IOException {
    LOGGER.info("warmUp()");

    final ByteArrayOutputStream baos = new ByteArrayOutputStream();

    final long freeMemory = Runtime.getRuntime().freeMemory();
    LOGGER.log(Level.INFO, "Runtime.freeMemory: {0}", freeMemory);

    for (int i = 0; i < 16; i++) {
        baos.reset();
        while (baos.size() < 1048576L) {
            baos.write(Tests.decodedBytes());
        }/*from   ww w  .  j  a  v a2s . c om*/
        final byte[] decoded = baos.toByteArray();
        new HexEncoder().encodeLikeABoss(decoded);
        new HexEncoder().encodeLikeAnEngineer(decoded);
    }

    for (int i = 0; i < 16; i++) {
        baos.reset();
        while (baos.size() < 1048576L) {
            baos.write(Tests.encodedBytes());
        }
        final byte[] encoded = baos.toByteArray();
        new HexDecoder().decodeLikeABoss(encoded);
        new HexDecoder().decodeLikeAnEngineer(encoded);
    }

    for (int i = 0; i < 128; i++) {
        encodeLikeABoss(Tests.decodedBytes());
        encodeLikeAnEngineer(Tests.decodedBytes());
    }
}

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From source file:org.apache.hadoop.hbase.util.EncryptionTest.java

/**
 * Check that the specified cipher can be loaded and initialized, or throw
 * an exception. Verifies key and cipher provider configuration as a
 * prerequisite for cipher verification.
 *
 * @param conf/*ww w .ja v  a 2s. c  om*/
 * @param cipher
 * @param key
 * @throws IOException
 */
public static void testEncryption(final Configuration conf, final String cipher, byte[] key)
        throws IOException {
    if (cipher == null) {
        return;
    }
    testKeyProvider(conf);
    testCipherProvider(conf);
    Boolean result = cipherResults.get(cipher);
    if (result == null) {
        try {
            Encryption.Context context = Encryption.newContext(conf);
            context.setCipher(Encryption.getCipher(conf, cipher));
            if (key == null) {
                // Make a random key since one was not provided
                context.setKey(context.getCipher().getRandomKey());
            } else {
                // This will be a wrapped key from schema
                context.setKey(EncryptionUtil.unwrapKey(conf,
                        conf.get(HConstants.CRYPTO_MASTERKEY_NAME_CONF_KEY, "hbase"), key));
            }
            byte[] iv = null;
            if (context.getCipher().getIvLength() > 0) {
                iv = new byte[context.getCipher().getIvLength()];
                Bytes.random(iv);
            }
            byte[] plaintext = new byte[1024];
            Bytes.random(plaintext);
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            Encryption.encrypt(out, new ByteArrayInputStream(plaintext), context, iv);
            byte[] ciphertext = out.toByteArray();
            out.reset();
            Encryption.decrypt(out, new ByteArrayInputStream(ciphertext), plaintext.length, context, iv);
            byte[] test = out.toByteArray();
            if (!Bytes.equals(plaintext, test)) {
                throw new IOException("Did not pass encrypt/decrypt test");
            }
            cipherResults.put(cipher, true);
        } catch (Exception e) {
            cipherResults.put(cipher, false);
            throw new IOException("Cipher " + cipher + " failed test: " + e.getMessage(), e);
        }
    } else if (result.booleanValue() == false) {
        throw new IOException("Cipher " + cipher + " previously failed test");
    }
}

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From source file:org.openstatic.util.JSONUtil.java

public static InputStream json2html(InputStream is) throws Exception {
    try {/*from  www.ja  va 2 s . co  m*/
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        int inputByte;
        while ((inputByte = is.read()) > -1) {
            baos.write(inputByte);
        }
        is.close();
        String jdata = "<html><body>" + json2html(new String(baos.toByteArray())) + "</body></html>";
        baos.reset();
        ByteArrayInputStream data = new ByteArrayInputStream(jdata.getBytes());
        return data;
    } catch (Exception e) {
        System.err.println(e.getMessage());
        e.printStackTrace(System.err);
        return null;
    }
}

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From source file:de.alpharogroup.io.SerializedObjectExtensions.java

/**
 * The Method toByteArray() serialize an Object to byte array.
 *
 * @param <T>//from ww w . j a v a2  s .c  om
 *            the generic type of the given object
 * @param object
 *            The Object to convert into a byte array.
 * @return The byte array from the Object.
 * @throws IOException
 *             Signals that an I/O exception has occurred.
 */
public static <T> byte[] toByteArray(final T object) throws IOException {
    ByteArrayOutputStream byteArrayOutputStream = null;
    ObjectOutputStream objectOutputStream = null;
    try {

        byteArrayOutputStream = new ByteArrayOutputStream(FileConstants.KILOBYTE);

        byteArrayOutputStream.reset();
        objectOutputStream = new ObjectOutputStream(byteArrayOutputStream);
        objectOutputStream.writeObject(object);
        objectOutputStream.close();
        return byteArrayOutputStream.toByteArray();
    } finally {
        StreamExtensions.closeOutputStream(byteArrayOutputStream);
        StreamExtensions.closeOutputStream(objectOutputStream);
    }
}

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