Example usage for java.util.zip CheckedInputStream read

Introduction

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

Prototype

public int read(byte b[]) throws IOException 

Source Link

Document

Reads up to b.length bytes of data from this input stream into an array of bytes.

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    CheckedInputStream cis = new CheckedInputStream(new FileInputStream("filename"), new Adler32());
    byte[] tempBuf = new byte[128];
    while (cis.read(tempBuf) >= 0) {
    }/* ww w  .j  av  a  2s .  com*/
    long checksum = cis.getChecksum().getValue();
}

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From source file:Main.java

public static String getCRC32(File file) {
    CRC32 crc32 = new CRC32();
    CheckedInputStream checkedinputstream = null;
    String crc = null;//w  w  w .j  a va2s  .c  o  m
    try {
        checkedinputstream = new CheckedInputStream(new FileInputStream(file), crc32);
        byte[] buf = new byte[1024];
        while (checkedinputstream.read(buf) >= 0) {
        }
        crc = Long.toHexString(crc32.getValue()).toUpperCase();
    } catch (Exception e) {
        Log.w(TAG, e);
        Log.e("WxException", e.getMessage(), e);
    } finally {
        if (checkedinputstream != null) {
            try {
                checkedinputstream.close();
            } catch (IOException e) {
            }
        }
    }
    return crc;
}

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From source file:AbstractFileSystemHelper.java

public static long getChecksum(InputStream is) {
    CheckedInputStream cis = null;
    long checksum = 0;
    try {//w w w  .  java 2s. 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;
}

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From source file:com.yifanlu.PSXperiaTool.ZpakCreate.java

public static long getCRC32(File file) throws IOException {
    CheckedInputStream cis = null;
    long fileSize = 0;
    // Computer CRC32 checksum
    cis = new CheckedInputStream(new FileInputStream(file), new CRC32());

    fileSize = file.length();/*from  ww w .j  a va  2 s . c om*/

    byte[] buf = new byte[128];
    while (cis.read(buf) != -1)
        ;

    long checksum = cis.getChecksum().getValue();
    cis.close();
    Logger.verbose("CRC32 of %s is %d", file.getPath(), checksum);
    return checksum;
}

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From source file:MultiFileChecksumHelper.java

public static long getChecksum(File[] files) {
    CheckedInputStream cis = null;
    FileInputStream is = null;/* w  ww  .  j  a  v a 2s .  co 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();
}

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From source file:com.blockwithme.longdb.tools.Utils.java

/** Get checksum CRC32 for the file content.
 * /*from w  ww .  java2  s  .c om*/
 * @param theFile
 *        the file
 * @param isCommpressed
 *        true if commpressed
 * @return the checksum (CRC32) of the file.
 * @throws Exception */
@SuppressWarnings("resource")
public static long getCRC32(final File theFile, final boolean isCommpressed) throws Exception {
    CheckedInputStream cis = null;
    try {
        final CRC32 checksum = new CRC32();
        // TODO: Would a buffered input stream make this faster?
        cis = new CheckedInputStream((isCommpressed ? new GZIPInputStream(new FileInputStream(theFile))
                : new FileInputStream(theFile)), checksum);
        final byte[] tempBuf = new byte[ONE_K];
        while (cis.read(tempBuf) >= 0)
            ; // just read the full stream. // $codepro.audit.disable
        return checksum.getValue();
    } finally {
        if (cis != null)
            cis.close();
    }
}

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From source file:net.sourceforge.jaulp.file.checksum.ChecksumUtils.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. ja va 2s . c  o 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(File file, 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());
    }
    int length = (int) file.length();
    byte[] buffer = new byte[length];
    long checksum = 0;
    while (cis.read(buffer) >= 0) {
        checksum = cis.getChecksum().getValue();
    }
    checksum = cis.getChecksum().getValue();
    StreamUtils.closeInputStream(cis);
    return checksum;
}

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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   w  w  w . j  a va2  s  . c o  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;
}

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From source file:de.alpharogroup.file.checksum.ChecksumUtils.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 w ww  .  j  a va2  s.c  o 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();
    StreamUtils.closeInputStream(cis);
    return checksum;
}

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From source file:com.panet.imeta.core.row.ValueDataUtil.java

public static Long ChecksumCRC32(ValueMetaInterface metaA, Object dataA) {
    long checksum = 0;
    FileObject file = null;/*w w  w.  jav  a  2 s .  c o  m*/
    try {
        file = KettleVFS.getFileObject(dataA.toString());
        CheckedInputStream cis = null;

        // Computer CRC32 checksum
        cis = new CheckedInputStream((FileInputStream) ((LocalFile) file).getInputStream(), new CRC32());
        byte[] buf = new byte[128];
        while (cis.read(buf) >= 0) {
        }

        checksum = cis.getChecksum().getValue();

    } catch (Exception e) {
    } finally {
        if (file != null)
            try {
                file.close();
            } catch (Exception e) {
            }
        ;
    }
    return checksum;
}

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