Example usage for java.util.zip Adler32 getValue

Introduction

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

Prototype

@Override
public long getValue() 

Source Link

Document

Returns the checksum value.

Usage

From source file:org.anarres.lzo.LzopOutputStream.java

/**
 * Writes an lzop-compatible header to the OutputStream provided.
 *///from   w ww . j a  va  2s.  co m
protected void writeLzopHeader() throws IOException {
    DataOutputBuffer dob = new DataOutputBuffer();
    try {
        dob.writeShort(LzopConstants.LZOP_VERSION);
        dob.writeShort(LzoVersion.LZO_LIBRARY_VERSION);
        dob.writeShort(LzopConstants.LZOP_COMPAT_VERSION);
        switch (getAlgorithm()) {
        case LZO1X:
            // case LZO1X_1:
            dob.writeByte(LzopConstants.M_LZO1X_1);
            dob.writeByte(5);
            break;
        /*
        case LZO1X_15:
        dob.writeByte(LzopConstants.M_LZO1X_1_15);
        dob.writeByte(1);
        break;
        case LZO1X_999:
        dob.writeByte(LzopConstants.M_LZO1X_999);
        dob.writeByte(9);
        break;
         */
        default:
            throw new IOException("Incompatible lzop algorithm " + getAlgorithm());
        }
        long mask = LzopConstants.F_ADLER32_C | LzopConstants.F_ADLER32_D;
        mask = mask | LzopConstants.F_CRC32_C | LzopConstants.F_CRC32_D;
        dob.writeInt((int) (flags & mask & 0xFFFFFFFF)); // all flags 0
        dob.writeInt(33188); // 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(LzopConstants.LZOP_MAGIC);
        out.write(dob.getData(), 0, dob.getLength());
    } finally {
        dob.close();
    }
}

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From source file:org.olat.upgrade.OLATUpgrade_9_0_0.java

private long checksum(byte[] binaryDatas) throws IOException {
    InputStream in = null;/* w w w . ja  v a2 s  .  co m*/
    Adler32 checksum = new Adler32();
    try {
        in = new CheckedInputStream(new ByteArrayInputStream(binaryDatas), checksum);
        IOUtils.copy(in, new NullOutputStream());
    } finally {
        IOUtils.closeQuietly(in);
    }
    return checksum.getValue();
}

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From source file:org.pentaho.di.trans.steps.checksum.CheckSum.java

private Long calculCheckSum(Object[] r) throws Exception {
    Long retval;/*from w  ww.  j  a  v a  2 s.co  m*/
    StringBuffer Buff = new StringBuffer();

    // Loop through fields
    for (int i = 0; i < data.fieldnr; i++) {
        String fieldvalue = getInputRowMeta().getString(r, data.fieldnrs[i]);
        Buff.append(fieldvalue);
    }

    if (meta.getCheckSumType().equals(CheckSumMeta.TYPE_CRC32)) {
        CRC32 crc32 = new CRC32();
        crc32.update(Buff.toString().getBytes());
        retval = new Long(crc32.getValue());
    } else {
        Adler32 adler32 = new Adler32();
        adler32.update(Buff.toString().getBytes());
        retval = new Long(adler32.getValue());
    }

    return retval;
}

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