How to use

equals

method

in

org.apache.flink.runtime.blob.BlobKey

@Override
public int read() throws IOException {
  if (this.bytesReceived == this.bytesToReceive) {
    return -1;
  }
  final int read = this.wrappedInputStream.read();
  if (read < 0) {
    throwEOFException();
  }
  ++this.bytesReceived;
  if (this.md != null) {
    this.md.update((byte) read);
    if (this.bytesReceived == this.bytesToReceive) {
      final BlobKey computedKey = new BlobKey(this.md.digest());
      if (!computedKey.equals(this.blobKey)) {
        throw new IOException("Detected data corruption during transfer");
      }
    }
  }
  return read;
}

@Override
public int read(byte[] b, int off, int len) throws IOException {
  final int bytesMissing = this.bytesToReceive - this.bytesReceived;
  if (bytesMissing == 0) {
    return -1;
  }
  final int maxRecv = Math.min(len, bytesMissing);
  final int read = this.wrappedInputStream.read(b, off, maxRecv);
  if (read < 0) {
    throwEOFException();
  }
  this.bytesReceived += read;
  if (this.md != null) {
    this.md.update(b, off, read);
    if (this.bytesReceived == this.bytesToReceive) {
      final BlobKey computedKey = new BlobKey(this.md.digest());
      if (!computedKey.equals(this.blobKey)) {
        throw new IOException("Detected data corruption during transfer");
      }
    }
  }
  return read;
}

private BlobKey receivePutResponseAndCompare(InputStream is, MessageDigest md) throws IOException {
  int response = is.read();
  if (response < 0) {
    throw new EOFException("Premature end of response");
  }
  else if (response == RETURN_OKAY) {
    if (md == null) {
      // not content addressable
      return null;
    }
    BlobKey remoteKey = BlobKey.readFromInputStream(is);
    BlobKey localKey = new BlobKey(md.digest());
    if (!localKey.equals(remoteKey)) {
      throw new IOException("Detected data corruption during transfer");
    }
    return localKey;
  }
  else if (response == RETURN_ERROR) {
    Throwable cause = readExceptionFromStream(is);
    throw new IOException("Server side error: " + cause.getMessage(), cause);
  }
  else {
    throw new IOException("Unrecognized response: " + response + '.');
  }
}