Example usage for java.util.zip Adler32 Adler32

Introduction

In this page you can find the example usage for java.util.zip Adler32 Adler32.

Prototype

public Adler32() 

Source Link

Document

Creates a new Adler32 object.

Usage

From source file:MultiFileChecksumHelper.java

public static long getChecksum(File[] files) {
    CheckedInputStream cis = null;
    FileInputStream is = null;/*from  w w w.j  a va  2 s . c  o m*/
    Checksum checksum = new Adler32();
    byte[] tempBuf = new byte[128];

    for (int i = 0; i < files.length && files[i] != null && files[i].exists() && files[i].isFile(); i++) {
        try {
            is = new FileInputStream(files[i]);
            cis = new CheckedInputStream(is, checksum);
            while (cis.read(tempBuf) >= 0) {
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        } finally {
            if (cis != null) {
                try {
                    cis.close();
                } catch (IOException ioe) {
                }
                cis = null;
            }
            if (is != null) {
                try {
                    is.close();
                } catch (IOException ioe) {
                }
                is = null;
            }
        }
    }
    return checksum.getValue();
}

---

From source file:org.broadleafcommerce.common.util.StringUtil.java

public static long getChecksum(String test) {
    try {/*ww w . ja v  a  2  s  . com*/
        byte buffer[] = test.getBytes();
        ByteArrayInputStream bais = new ByteArrayInputStream(buffer);
        CheckedInputStream cis = new CheckedInputStream(bais, new Adler32());
        byte readBuffer[] = new byte[buffer.length];
        cis.read(readBuffer);
        return cis.getChecksum().getValue();
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
}

---

From source file:org.yccheok.jstock.analysis.Utils.java

public static long getChecksum(File file) {
    FileInputStream stream = null;
    CheckedInputStream cis = null;
    try {/*from   ww w .j a  va  2 s.  c o m*/
        // Compute Adler-32 checksum
        stream = new FileInputStream(file);
        cis = new CheckedInputStream(stream, new Adler32());
        byte[] tempBuf = new byte[128];
        while (cis.read(tempBuf) >= 0) {
        }
        long checksum = cis.getChecksum().getValue();
        return checksum;
    } catch (IOException ex) {
        log.error(null, ex);
    } finally {
        org.yccheok.jstock.file.Utils.close(cis);
        org.yccheok.jstock.file.Utils.close(stream);
    }
    return 0;
}

---

From source file:edu.cornell.med.icb.util.SimpleChecksum.java

/**
 * Takes a string and returns a that same string
 * with two additional characters which are a simple
 * checksum, each char will be "A".."Z". An empty
 * (no characters) or null string will just be
 * returned with no change./* w w  w .  ja v  a 2  s .co m*/
 * @param valToChecksum the string to add the checksum to
 * @return the string with the checksum
 */
public static String simpleChecksum(final String valToChecksum) {
    if (StringUtils.isEmpty(valToChecksum)) {
        return valToChecksum;
    }

    final Adler32 adler = new Adler32();
    adler.update(valToChecksum.getBytes());
    final long[] result = splitLong(adler.getValue());

    return String.format("%s%c%c", valToChecksum, CHECKSUM_CHARS[(int) result[0]],
            CHECKSUM_CHARS[(int) result[1]]);
}

---

From source file:ChecksumCalculator.java

public static long compute(byte[] data, int start, int length) {
    Checksum checksum = new Adler32();
    checksum.update(data, start, length);
    return checksum.getValue();
}

---

From source file:com.hadoop.compression.lzo.LzopOutputStream.java

/**
 * Write an lzop-compatible header to the OutputStream provided.
 *//*from www . ja  va  2 s . c om*/
protected static void writeLzopHeader(OutputStream out, LzoCompressor.CompressionStrategy strategy)
        throws IOException {
    DataOutputBuffer dob = new DataOutputBuffer();
    try {
        dob.writeShort(LzopCodec.LZOP_VERSION);
        dob.writeShort(LzoCompressor.LZO_LIBRARY_VERSION);
        dob.writeShort(LzopCodec.LZOP_COMPAT_VERSION);
        switch (strategy) {
        case LZO1X_1:
            dob.writeByte(1);
            dob.writeByte(5);
            break;
        case LZO1X_15:
            dob.writeByte(2);
            dob.writeByte(1);
            break;
        case LZO1X_999:
            dob.writeByte(3);
            dob.writeByte(9);
            break;
        default:
            throw new IOException("Incompatible lzop strategy: " + strategy);
        }
        dob.writeInt(0); // all flags 0
        dob.writeInt(0x81A4); // mode
        dob.writeInt((int) (System.currentTimeMillis() / 1000)); // mtime
        dob.writeInt(0); // gmtdiff ignored
        dob.writeByte(0); // no filename
        Adler32 headerChecksum = new Adler32();
        headerChecksum.update(dob.getData(), 0, dob.getLength());
        int hc = (int) headerChecksum.getValue();
        dob.writeInt(hc);
        out.write(LzopCodec.LZO_MAGIC);
        out.write(dob.getData(), 0, dob.getLength());
    } finally {
        dob.close();
    }
}

---

From source file:org.codice.ddf.checksum.impl.Adler32ChecksumProvider.java

@Override
public String calculateChecksum(InputStream inputStream) throws IOException, NoSuchAlgorithmException {

    if (inputStream == null) {
        throw new IllegalArgumentException("InputStream cannot be null");
    }/*from w ww . j  a v  a 2  s. com*/

    long checksumValue = 0L;

    try (CheckedInputStream cis = new CheckedInputStream(inputStream, new Adler32())) {
        IOUtils.toByteArray(cis);
        checksumValue = cis.getChecksum().getValue();
    }

    return Long.toHexString(checksumValue);

}

---

From source file:de.fu_berlin.inf.dpp.core.util.FileUtils.java

/**
 * Calculate Adler32 checksum for given file.
 *
 * @return checksum of file//w w w.  j a v  a2  s. c  om
 * @throws IOException if checksum calculation has been failed.
 */
public static long checksum(IFile file) throws IOException {

    InputStream in;
    try {
        in = file.getContents();
    } catch (IOException e) {
        throw new IOException("failed to calculate checksum.", e);
    }

    byte[] buffer = new byte[BUFFER_SIZE];

    Adler32 adler = new Adler32();

    int read;

    try {
        while ((read = in.read(buffer)) != -1) {
            adler.update(buffer, 0, read);
        }
    } finally {
        IOUtils.closeQuietly(in);
    }

    return adler.getValue();
}

---

From source file:org.openmrs.module.sync.serialization.ZipPackage.java

public ZipPackage(File root, String target) {
    try {/*w  w  w .j av a 2  s  .co m*/
        this.rootName = root.getAbsolutePath();
        this.targetName = target;
        File archiveFolder = new File(root, "archive");
        archiveFolder.mkdir();
        File f = new File(archiveFolder, targetName);
        f.mkdir();
        if (!f.exists())
            f.mkdirs();
        File outputStreamDir = new File(f,
                targetName + "_" + SyncConstants.SYNC_FILENAME_MASK.format(new Date()) + ".zip");
        this.dest = new FileOutputStream(outputStreamDir);
        this.checksum = new CheckedOutputStream(dest, new Adler32());
        this.out = new ZipOutputStream(new BufferedOutputStream(checksum));
        this.data = new byte[BUFFER];
    } catch (Exception e) {
        log.error(e.toString());
    }
}

---

From source file:AbstractFileSystemHelper.java

public static long getChecksum(InputStream is) {
    CheckedInputStream cis = null;
    long checksum = 0;
    try {//  w  ww. j a v a2 s  . c  om
        cis = new CheckedInputStream(is, new Adler32());
        byte[] tempBuf = new byte[128];
        while (cis.read(tempBuf) >= 0) {
        }
        checksum = cis.getChecksum().getValue();
    } catch (IOException e) {
        checksum = 0;
    } finally {
        if (cis != null) {
            try {
                cis.close();
            } catch (IOException ioe) {
            }
        }
    }
    return checksum;
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• »