package jalview.datamodel;

public class SequenceDummy extends Sequence implements SequenceI
{
  public SequenceDummy(String sequenceId)
  {
    super(sequenceId, "THISAPLACEHOLDER");
  }

  private boolean dummy = true;
  /**
   * become a proxy for mseq, merging any existing annotation on this sequence
   * 
   * @param mseq
   */
  public void become(SequenceI mseq)
  {
    initSeqFrom(mseq, null);
    dummy=false;
  }

  /**
   * Test if the SequenceDummy has been promoted to a real sequence via
   * SequenceDummy.become
   * 
   * @return true if this is a placeholder and contains no actual sequence data
   */
  public boolean isDummy()
  {
    return dummy;
  }
}