Example usage for java.util.zip CRC32 CRC32

Introduction

In this page you can find the example usage for java.util.zip CRC32 CRC32.

Prototype

public CRC32() 

Source Link

Document

Creates a new CRC32 object.

Usage

From source file:org.apache.hadoop.raid.Decoder.java

/**
 * Recover a corrupt block to local file. Using the stripe information 
 * stored in the Stripe Store.//  www.  j a  v  a 2s  .  c o m
 * 
 * @param srcFs The filesystem containing the source file.
 * @param srcPath The damaged source file.
 * @param lostBlock The missing/corrupted block
 * @param localBlockFile The file to write the block to.
 * @param blockSize The block size of the file.
 * @param lostBlockOffset The start offset of the block in the file.
 * @param limit The maximum number of bytes to be written out.
 * @param si  The StripeInfo retrieved from Stripe Store.
 * @param context
 * @return
 * @throws java.io.IOException
 */
public CRC32 recoverBlockToFileFromStripeInfo(FileSystem srcFs, Path srcPath, Block lostBlock,
        File localBlockFile, long blockSize, long lostBlockOffset, long limit, StripeInfo si, Context context)
        throws IOException {
    OutputStream out = null;
    try {
        out = new FileOutputStream(localBlockFile);
        CRC32 crc = null;
        if (checksumStore != null) {
            crc = new CRC32();
        }
        fixErasedBlockImpl(srcFs, srcPath, srcFs, null, true, blockSize, lostBlockOffset, limit, false, out,
                context, crc, si, true, lostBlock);
        return crc;
    } finally {
        if (null != out) {
            out.close();
        }
    }
}

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From source file:com.eventattend.portal.bl.FaceBookBL.java

public static String generateEmailHash(String email) {
    email = email.trim().toLowerCase();/*from   w w  w . j  av a2s  . c om*/
    CRC32 crc = new CRC32();
    crc.update(email.getBytes());
    String md5 = MD5(email);
    return crc.getValue() + "_" + md5;
}

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From source file:org.pentaho.di.core.row.ValueDataUtil.java

public static Long ChecksumCRC32(ValueMetaInterface metaA, Object dataA) {
    long checksum = 0;
    FileObject file = null;/* w ww . ja  va2 s.  co m*/
    try {
        file = KettleVFS.getFileObject(dataA.toString());
        CheckedInputStream cis = null;

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

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

    } catch (Exception e) {
        // ignore - should likely log the exception
    } finally {
        if (file != null) {
            try {
                file.close();
                file = null;
            } catch (Exception e) {
                // Ignore
            }
        }
    }
    return checksum;
}

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From source file:it.cnr.icar.eric.common.Utility.java

public static ZipOutputStream createZipOutputStream(String baseDir, String[] relativeFilePaths, OutputStream os)
        throws FileNotFoundException, IOException {
    if (baseDir.startsWith("file:/")) {
        baseDir = baseDir.substring(5);//from www . j av a2  s. co m
    }
    ZipOutputStream zipoutputstream = new ZipOutputStream(os);

    zipoutputstream.setMethod(ZipOutputStream.STORED);

    for (int i = 0; i < relativeFilePaths.length; i++) {
        File file = new File(baseDir + FILE_SEPARATOR + relativeFilePaths[i]);

        byte[] buffer = new byte[1000];

        int n;

        FileInputStream fis;

        // Calculate the CRC-32 value.  This isn't strictly necessary
        //   for deflated entries, but it doesn't hurt.

        CRC32 crc32 = new CRC32();

        fis = new FileInputStream(file);

        while ((n = fis.read(buffer)) > -1) {
            crc32.update(buffer, 0, n);
        }

        fis.close();

        // Create a zip entry.

        ZipEntry zipEntry = new ZipEntry(relativeFilePaths[i]);

        zipEntry.setSize(file.length());
        zipEntry.setTime(file.lastModified());
        zipEntry.setCrc(crc32.getValue());

        // Add the zip entry and associated data.

        zipoutputstream.putNextEntry(zipEntry);

        fis = new FileInputStream(file);

        while ((n = fis.read(buffer)) > -1) {
            zipoutputstream.write(buffer, 0, n);
        }

        fis.close();

        zipoutputstream.closeEntry();
    }

    return zipoutputstream;
}

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From source file:de.catma.ui.repository.wizard.FileTypePanel.java

private boolean loadSourceDocumentAndContent(SourceDocumentResult sdr) {
    try {/*w ww  .  ja  va  2s  .  c  o  m*/
        SourceDocumentHandler sourceDocumentHandler = new SourceDocumentHandler();
        SourceDocument sourceDocument = sourceDocumentHandler.loadSourceDocument(sdr.getSourceDocumentID(),
                sdr.getSourceDocumentInfo());
        sdr.setSourceDocument(sourceDocument);

        TechInfoSet techInfoSet = sdr.getSourceDocumentInfo().getTechInfoSet();
        String documentId = sdr.getSourceDocumentID();

        ProtocolHandler protocolHandler = getProtocolHandlerForUri(techInfoSet.getURI(), documentId,
                techInfoSet.getMimeType());

        byte[] currentByteContent = protocolHandler.getByteContent();

        sourceDocument.getSourceContentHandler().load(new ByteArrayInputStream(currentByteContent));

        FileOSType fileOSType = FileOSType.getFileOSType(sourceDocument.getContent());

        sdr.getSourceDocumentInfo().getTechInfoSet().setFileOSType(fileOSType);
        CRC32 checksum = new CRC32();
        checksum.update(currentByteContent);
        sdr.getSourceDocumentInfo().getTechInfoSet().setChecksum(checksum.getValue());
        return true;
    } catch (Exception e) {
        TechInfoSet techInfoSet = sdr.getSourceDocumentInfo().getTechInfoSet();
        Notification.show(
                "Information",
                "Sorry, CATMA wasn't able to process the file as "
                        + techInfoSet.getFileType()
                        + (techInfoSet.getFileType().isCharsetSupported()
                                ? " with " + ((techInfoSet.getCharset() == null) ? "unknown charset"
                                        : " charset " + techInfoSet.getCharset())
                                : "")
                        + "\n\nThe original error message is: " + e.getLocalizedMessage(),
                Notification.Type.WARNING_MESSAGE);
        return false;
    }
}

---

From source file:org.apache.hadoop.raid.TestDirectoryRaidEncoder.java

private void printFileCRC(FileSystem fs, Path file, long bufferSize) throws IOException {
    byte[] buffer = new byte[(int) bufferSize];
    FSDataInputStream stm = fs.open(file);
    StringBuilder sb = new StringBuilder();
    sb.append("CRC for file: " + file + " size " + fs.getFileStatus(file).getLen() + "\n");
    while (stm.read(buffer) >= 0) {
        CRC32 crc = new CRC32();
        crc.update(buffer);/*from www.j a v  a 2 s .c  o m*/
        sb.append(" " + crc.getValue());
    }
    sb.append("\n");
    System.out.println(sb.toString());
    stm.close();
}

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From source file:org.kuali.kfs.module.ar.report.service.impl.TransmitContractsAndGrantsInvoicesServiceImpl.java

/**
 *
 * @param report//w ww.  ja va 2  s  . c  o m
 * @param invoiceFileWritten
 * @param zos
 * @param buffer
 * @param crc
 * @return
 * @throws IOException
 */
private boolean writeFile(byte[] arrayToWrite, ZipOutputStream zos, String fileName) throws IOException {
    int bytesRead;
    byte[] buffer = new byte[1024];
    CRC32 crc = new CRC32();

    if (ObjectUtils.isNotNull(arrayToWrite) && arrayToWrite.length > 0) {
        BufferedInputStream bis = new BufferedInputStream(new ByteArrayInputStream(arrayToWrite));
        try {
            while ((bytesRead = bis.read(buffer)) != -1) {
                crc.update(buffer, 0, bytesRead);
            }
            bis.close();
            // Reset to beginning of input stream
            bis = new BufferedInputStream(new ByteArrayInputStream(arrayToWrite));
            ZipEntry entry = new ZipEntry(fileName);
            entry.setMethod(ZipEntry.STORED);
            entry.setCompressedSize(arrayToWrite.length);
            entry.setSize(arrayToWrite.length);
            entry.setCrc(crc.getValue());
            zos.putNextEntry(entry);
            while ((bytesRead = bis.read(buffer)) != -1) {
                zos.write(buffer, 0, bytesRead);
            }
        } finally {
            bis.close();
        }
        return true;
    }
    return false;
}

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From source file:org.cryptomator.crypto.aes256.Aes256Cryptor.java

private long crc32Sum(byte[] source) {
    final CRC32 crc32 = new CRC32();
    crc32.update(source);/*from   w  ww  .ja va2s. c  om*/
    return crc32.getValue();
}

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From source file:org.docx4j.openpackaging.io3.stores.ZipPartStore.java

public void saveBinaryPart(Part part) throws Docx4JException {

    // Drop the leading '/'
    String resolvedPartUri = part.getPartName().getName().substring(1);

    try {//from   ww  w . java 2s.com

        byte[] bytes = null;

        if (((BinaryPart) part).isLoaded()) {

            bytes = ((BinaryPart) part).getBytes();

        } else {

            if (this.sourcePartStore == null) {

                throw new Docx4JException("part store has changed, and sourcePartStore not set");

            } else if (this.sourcePartStore == this) {

                // Just use the ByteArray
                log.debug(part.getPartName() + " is clean");
                ByteArray byteArray = partByteArrays.get(part.getPartName().getName().substring(1));
                if (byteArray == null)
                    throw new IOException("part '" + part.getPartName() + "' not found");
                bytes = byteArray.getBytes();

            } else {

                InputStream is = sourcePartStore.loadPart(part.getPartName().getName().substring(1));
                bytes = IOUtils.toByteArray(is);
            }
        }

        // Add ZIP entry to output stream.
        if (part instanceof OleObjectBinaryPart) {
            // Workaround: Powerpoint 2010 (32-bit) can't play eg WMV if it is compressed!
            // (though 64-bit version is fine)

            ZipEntry ze = new ZipEntry(resolvedPartUri);
            ze.setMethod(ZipOutputStream.STORED);

            // must set size, compressed size, and crc-32
            ze.setSize(bytes.length);
            ze.setCompressedSize(bytes.length);

            CRC32 crc = new CRC32();
            crc.update(bytes);
            ze.setCrc(crc.getValue());

            zos.putNextEntry(ze);
        } else {
            zos.putNextEntry(new ZipEntry(resolvedPartUri));
        }

        zos.write(bytes);

        // Complete the entry
        zos.closeEntry();

    } catch (Exception e) {
        throw new Docx4JException("Failed to put binary part", e);
    }

    log.info("success writing part: " + resolvedPartUri);

}

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From source file:com.utdallas.s3lab.smvhunter.monkey.MonkeyMe.java

/**
 * @param apkName/*  w  ww. j  a va  2  s .c  om*/
 * @return
 */
public static String genCrc(String apkName) {
    CRC32 crc = new CRC32();
    crc.update(apkName.getBytes());

    String input = "";
    if (crc.getValue() < 0) {
        input = Long.toString(crc.getValue() * -1);
    } else {
        input = Long.toString(crc.getValue());
    }
    return input;
}

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