Example usage for java.util.zip CheckedInputStream CheckedInputStream

Introduction

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

Prototype

public CheckedInputStream(InputStream in, Checksum cksum)

Source Link

Document

Creates an input stream using the specified Checksum.

Usage

From source file:org.talend.core.model.metadata.builder.database.ExtractMetaDataUtils.java

public boolean checkFileCRCCode(File targetFile, File sourceFile) throws Exception {
    // Cyclic Redundancy Check(CRC)
    if (!targetFile.exists() || !sourceFile.exists()) {
        return true;
    }/*w ww  . j ava  2 s  .  c  o m*/
    FileInputStream tagetFilestream = new FileInputStream(targetFile);
    CRC32 targertCrc32 = new CRC32();
    for (CheckedInputStream checkedinputstream = new CheckedInputStream(tagetFilestream,
            targertCrc32); checkedinputstream.read() != -1;) {
        //
    }
    FileInputStream sourceFilestream = new FileInputStream(sourceFile);
    CRC32 sourceCrc32 = new CRC32();
    for (CheckedInputStream checkedinputstream = new CheckedInputStream(sourceFilestream,
            sourceCrc32); checkedinputstream.read() != -1;) {
        //
    }
    tagetFilestream.close();
    sourceFilestream.close();
    return Long.toHexString(targertCrc32.getValue()).equals(Long.toHexString(sourceCrc32.getValue()));

}

From source file:org.talend.utils.io.FilesUtils.java

public static long getChecksumAlder32(File file) throws IOException {
    BufferedInputStream bufferedInputStream = null;
    CheckedInputStream cis = null;
    try {/*from   w  ww  .  ja v  a  2 s  . co  m*/
        bufferedInputStream = new BufferedInputStream(new FileInputStream(file));
        // Compute Adler-32 checksum
        cis = new CheckedInputStream(bufferedInputStream, new Adler32());
        byte[] tempBuf = new byte[128];
        while (cis.read(tempBuf) >= 0) {
            // do nothing
        }
        return cis.getChecksum().getValue();
    } catch (IOException e) {
        throw e;
    } finally {
        if (bufferedInputStream != null) {
            bufferedInputStream.close();
        }
        if (cis != null) {
            cis.close();
        }
    }
}

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

public static long getChecksum(File file) {
    FileInputStream stream = null;
    CheckedInputStream cis = null;
    try {// ww w  . j  a  va 2s.  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:watne.seis720.project.AES_Utilities.java

/**
 * Compute the Adler-32 checksum of the specified file. Code based on
 * &quot;e457. Calculating the Checksum of a File&quot;, &quot;The Java
 * Developers Almanac 1.4&quot;, <a
 * href="http://www.exampledepot.com/egs/java.util.zip/ChecksumFile.html">http://www.exampledepot.com/egs/java.util.zip/ChecksumFile.html</a>
 * @param checkFile the file to be checked.
 * @return the Adler-32 checkusm of the specified file.
 * @throws IOException if an error occurs reading checkFile.
 *///ww w.j a  v a  2 s  .c  o m
public static long getFileChecksum(File checkFile) throws IOException {
    long checksum = -1;

    CheckedInputStream cis = new CheckedInputStream(new FileInputStream(checkFile), new Adler32());
    byte[] tempBuf = new byte[128];

    while (cis.read(tempBuf) >= 0) {

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