public int read()

in encryption/src/main/java/org/apache/solr/encryption/crypto/DecryptingInputStream.java [152:181]

• 29 lines of code
• 7 McCabe index (conditional complexity)

  public int read(byte[] b, int offset, int length) throws IOException {
    if (offset < 0 || length < 0 || offset + length > b.length) {
      throw new IllegalArgumentException(
        "Invalid read buffer parameters (offset=" + offset + ", length=" + length
          + ", arrayLength=" + b.length + ")");
    }
    int numDecrypted = 0;
    while (length > 0) {
      // Transfer decrypted bytes from outBuffer.
      int outRemaining = outSize - outPos;
      if (outRemaining > 0) {
        if (length <= outRemaining) {
          System.arraycopy(outBuffer, outPos, b, offset, length);
          outPos += length;
          numDecrypted += length;
          return numDecrypted;
        }
        System.arraycopy(outBuffer, outPos, b, offset, outRemaining);
        outPos += outRemaining;
        numDecrypted += outRemaining;
        offset += outRemaining;
        length -= outRemaining;
      }
      if (!readToFillBuffer(length)) {
        return numDecrypted == 0 ? -1 : numDecrypted;
      }
      decryptBuffer();
    }
    return numDecrypted;
  }