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:de.alpharogroup.file.checksum.ChecksumExtensions.java

/**
 * Gets the checksum from the given file. If the flag crc is true than the CheckedInputStream is
 * constructed with an instance of <code>java.util.zip.CRC32</code> otherwise with an instance
 * of <code>java.util.zip.Adler32</code>.
 *
 * @param file//from ww w. java  2s. co  m
 *            The file The file from what to get the checksum.
 * @param crc
 *            The crc If the flag crc is true than the CheckedInputStream is constructed with an
 *            instance of {@link java.util.zip.CRC32} object otherwise it is constructed with an
 *            instance of
 * @return The checksum from the given file as long.
 * @throws FileNotFoundException
 *             Is thrown if the file is not found.
 * @throws IOException
 *             Signals that an I/O exception has occurred. {@link java.util.zip.CRC32} object
 *             otherwise it is constructed with an instance of {@link java.util.zip.Adler32}
 *             object. {@link java.util.zip.Adler32} object.
 */
public static long getChecksum(final File file, final boolean crc) throws FileNotFoundException, IOException {
    CheckedInputStream cis = null;
    if (crc) {
        cis = new CheckedInputStream(new FileInputStream(file), new CRC32());
    } else {
        cis = new CheckedInputStream(new FileInputStream(file), new Adler32());
    }
    final int length = (int) file.length();
    final byte[] buffer = new byte[length];
    long checksum = 0;
    while (cis.read(buffer) >= 0) {
        checksum = cis.getChecksum().getValue();
    }
    checksum = cis.getChecksum().getValue();
    StreamExtensions.closeInputStream(cis);
    return checksum;
}

From source file:org.spliffy.server.apps.calendar.CalendarManager.java

private void updateCtag(CalEvent event) {
    OutputStream nulOut = new NullOutputStream();
    CheckedOutputStream cout = new CheckedOutputStream(nulOut, new Adler32());
    HashUtils.appendLine(event.getDescription(), cout);
    HashUtils.appendLine(event.getSummary(), cout);
    HashUtils.appendLine(event.getTimezone(), cout);
    HashUtils.appendLine(event.getStartDate(), cout);
    HashUtils.appendLine(event.getEndDate(), cout);
    Checksum check = cout.getChecksum();
    long crc = check.getValue();
    event.setCtag(crc);//from   w w w .  j a  v  a2 s . c  o m
    updateCtag(event.getCalendar());
}

From source file:io.milton.cloud.server.apps.calendar.CalendarManager.java

private void updateCtag(CalEvent event) {
    OutputStream nulOut = new NullOutputStream();
    CheckedOutputStream cout = new CheckedOutputStream(nulOut, new Adler32());
    appendLine(event.getDescription(), cout);
    appendLine(event.getSummary(), cout);
    appendLine(event.getTimezone(), cout);
    appendLine(event.getStartDate(), cout);
    appendLine(event.getEndDate(), cout);
    Checksum check = cout.getChecksum();
    long crc = check.getValue();
    event.setCtag(crc);/*from  ww w .  java  2 s. c  o  m*/
    updateCtag(event.getCalendar());
}

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

private Long calculCheckSum(Object[] r) throws Exception {
    Long retval;//  w  ww  .  j  a v a2s  .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;
}

From source file:net.sourceforge.jaulp.file.checksum.ChecksumUtils.java

/**
 * Gets the checksum from the given byte array with an instance of.
 *
 * @param bytes// w w  w  . ja v  a2  s.  c  om
 *            The byte array.
 * @return The checksum from the byte array as long. {@link java.util.zip.Adler32} object.
 */
public static long getCheckSumAdler32(byte[] bytes) {
    Checksum checksum = new Adler32();
    checksum.update(bytes, 0, bytes.length);
    long cs = checksum.getValue();
    return cs;
}

From source file:org.spliffy.server.apps.calendar.CalendarManager.java

private void updateCtag(Calendar sourceCal) {
    OutputStream nulOut = new NullOutputStream();
    CheckedOutputStream cout = new CheckedOutputStream(nulOut, new Adler32());

    HashUtils.appendLine(sourceCal.getColor(), cout);
    if (sourceCal.getEvents() != null) {
        for (CalEvent r : sourceCal.getEvents()) {
            String name = r.getName();
            String line = HashUtils.toHashableText(name, r.getCtag(), "");
            HashUtils.appendLine(line, cout);
        }//ww  w. j  a  va  2  s. c o  m
    }
    Checksum check = cout.getChecksum();
    long crc = check.getValue();
    sourceCal.setCtag(crc);
}

From source file:io.milton.cloud.server.apps.calendar.CalendarManager.java

private void updateCtag(Calendar sourceCal) {
    OutputStream nulOut = new NullOutputStream();
    CheckedOutputStream cout = new CheckedOutputStream(nulOut, new Adler32());

    appendLine(sourceCal.getColor(), cout);
    if (sourceCal.getEvents() != null) {
        for (CalEvent r : sourceCal.getEvents()) {
            String name = r.getName();
            String line = HashCalc.getInstance().toHashableText(name, r.getCtag() + "", "");
            appendLine(line, cout);//  w  ww .  j a v a2  s  .co m
        }
    }
    Checksum check = cout.getChecksum();
    long crc = check.getValue();
    sourceCal.setCtag(crc);
}

From source file:org.theospi.portfolio.guidance.impl.GuidanceManagerImpl.java

public void packageGuidanceForExport(List guidanceIds, OutputStream os) throws IOException {
    CheckedOutputStream checksum = new CheckedOutputStream(os, new Adler32());
    ZipOutputStream zos = new ZipOutputStream(new BufferedOutputStream(checksum));
    List exportedRefs = new ArrayList();
    for (Iterator i = guidanceIds.iterator(); i.hasNext();) {
        String id = (String) i.next();
        processGuidance(id, zos, exportedRefs);
    }/*from  w  w w.  j ava  2s.  co m*/

    zos.finish();
    zos.flush();
}

From source file:de.alpharogroup.file.checksum.ChecksumExtensions.java

/**
 * Gets the checksum from the given byte array with an instance of.
 *
 * @param bytes// w  w w. j av  a  2  s. c  o m
 *            The byte array.
 * @return The checksum from the byte array as long. {@link java.util.zip.Adler32} object.
 */
public static long getCheckSumAdler32(final byte[] bytes) {
    final Checksum checksum = new Adler32();
    checksum.update(bytes, 0, bytes.length);
    final long cs = checksum.getValue();
    return cs;
}

From source file:com.alcatel_lucent.nz.wnmsextract.reader.FileUtilities.java

public long checksum(File input) {
    long checksum = -1;
    try {//  ww w.  j a  va  2  s.  co m
        FileInputStream fis = null;
        CheckedInputStream cis = null;
        Adler32 adler = null;
        fis = new FileInputStream(input);
        adler = new Adler32();
        cis = new CheckedInputStream(fis, adler);

        byte[] buffer = new byte[1024];
        while (cis.read(buffer) >= 0) {
            checksum = cis.getChecksum().getValue();
        }

    } catch (IOException e) {
        jlog.fatal("IO Exception on " + input.getAbsolutePath() + e);
    }

    return checksum;

}