code: public boolean write(DataOutputStream daOut, boolean bFixedLength)
      {
          try   {
              Boolean boData = (Boolean)this.getData();
              boolean bData;
              if (boData == null)
                  bData = Boolean.FALSE.booleanValue(); // HACK
              else
                  bData = boData.booleanValue();
              daOut.writeBoolean(bData);
              return true;
          } catch (IOException ex)    {
              ex.printStackTrace();
              return false;
          }
      }
docs: Write the physical data in this field to a stream file.
  @param daOut Output stream to add this field to.
  @param bFixedLength If false (default) be sure to get the length from the stream.
  @return boolean Success?