Examples of org.apache.derby.iapi.util.ByteArray

org.apache.derby.iapi.util.ByteArray
ByteArray wraps java byte arrays (byte[]) to allow byte arrays to be used as keys in hashtables. This is required because the equals function on byte[] directly uses reference equality.
This class also allows the trio of array, offset and length to be carried around as a single object.

                // column is long.


                if (!(column instanceof InputStream)) 
                {
                    // Convert already written object to an InputStream.
                    ByteArray fieldData =
                        new ByteArray(
                            ((DynamicByteArrayOutputStream)out).getByteArray(),
                            (columnBeginPosition), fieldDataLength);


                    ByteArrayInputStream columnIn =
                        new ByteArrayInputStream(
                            fieldData.getArray(), columnBeginPosition, 
                            fieldDataLength);


                    MemByteHolder byteHolder = 
                        new MemByteHolder(fieldDataLength + 1);

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    }


    // set the position to the beginning of the buffer
    logBuffer.setPosition(optionalDataStart);


    this.preparedLog = new ByteArray(logBuffer.getByteArray(), optionalDataStart,
      optionalDataLength);


  }

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    ClassFormatOutput cfo = new ClassFormatOutput(classFileSize + 200);


    put(cfo);


    return new ByteArray(cfo.getData(), 0, cfo.size());


  }

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    }


    // set the position to the beginning of the buffer
    logBuffer.setPosition(optionalDataStart);


    this.preparedLog = new ByteArray(logBuffer.getByteArray(), optionalDataStart,
      optionalDataLength);
  }

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    int optionalDataLength = logBuffer.getPosition() - optionalDataStart;


    // set the position to the beginning of the buffer
    logBuffer.setPosition(optionalDataStart);


    this.preparedLog = new ByteArray(
            logBuffer.getByteArray(), optionalDataStart, optionalDataLength);
  }

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    }


    int optionalDataStart = localLogBuffer.getBeginPosition();
    int optionalDataLength = localLogBuffer.getPosition() - optionalDataStart;


    this.preparedLog = new ByteArray (localLogBuffer.getByteArray(), optionalDataStart,
      optionalDataLength);
  }

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    }


    // set the position to the beginning of the buffer
    logBuffer.setPosition(optionalDataStart);


    this.preparedLog = new ByteArray(logBuffer.getByteArray(), optionalDataStart,
      optionalDataLength);
  }

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      int optionalDataLength = 0;
      int optionalDataOffset = 0;
      int completeLength = 0;


      ByteArray preparedLogArray = operation.getPreparedLog();
      if (preparedLogArray != null) {


        preparedLog = preparedLogArray.getArray();
        optionalDataLength = preparedLogArray.getLength();
        optionalDataOffset = preparedLogArray.getOffset();


        // There is a race condition if the operation is a begin tran in
        // that between the time the beginXact log record is written to
        // disk and the time the transaction object is updated in the
        // beginXact.doMe method, other log records may be written.

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  GeneratedClass getGeneratedClass(ByteArray savedBytes) throws StandardException {
    if (gc != null) return gc;


    if (savedBytes != null)
    {
      ByteArray classBytecode = cb.getClassBytecode();


      // note: be sure to set the length since
      // the class builder allocates the byte array
      // in big chunks
      savedBytes.setBytes(classBytecode.getArray());
      savedBytes.setLength(classBytecode.getLength());
    }


      gc =  cb.getGeneratedClass();


    return gc; // !! yippee !! here it is...

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    super.readExternal(in);
    operation = in.readByte();


    if (operation == CREATE && hasCreateByteArray)
    {
      createByteArray = new ByteArray();
      createByteArray.readExternal(in);
    }
  }

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