001/*
002 *                    BioJava development code
003 *
004 * This code may be freely distributed and modified under the
005 * terms of the GNU Lesser General Public Licence.  This should
006 * be distributed with the code.  If you do not have a copy,
007 * see:
008 *
009 *      http://www.gnu.org/copyleft/lesser.html
010 *
011 * Copyright for this code is held jointly by the individual
012 * authors.  These should be listed in @author doc comments.
013 *
014 * For more information on the BioJava project and its aims,
015 * or to join the biojava-l mailing list, visit the home page
016 * at:
017 *
018 *      http://www.biojava.org/
019 *
020 */
021
022
023package org.biojava.bio.symbol;
024
025import org.biojava.bio.Annotatable;
026import org.biojava.bio.Annotation;
027import org.biojava.utils.AbstractChangeable;
028import org.biojava.utils.ChangeForwarder;
029import org.biojava.utils.ChangeSupport;
030import org.biojava.utils.ChangeType;
031
032/**
033 * The base-class for Symbol implementations.
034 *
035 * @author Matthew Pocock
036 * @since 1.1
037 */
038public abstract class AbstractSymbol
039  extends
040    AbstractChangeable
041  implements
042    Symbol
043{
044  protected transient ChangeForwarder annotationForwarder = null;
045
046  protected ChangeSupport getChangeSupport(ChangeType changeType) {
047    ChangeSupport changeSupport = super.getChangeSupport(changeType);
048
049    if(
050      (Annotatable.ANNOTATION.isMatchingType(changeType)) &&
051      (annotationForwarder == null)
052    ) {
053      annotationForwarder =
054              new ChangeForwarder.Retyper(this, changeSupport, Annotatable.ANNOTATION);
055      getAnnotation().addChangeListener(annotationForwarder, Annotation.PROPERTY);
056    }
057
058    return changeSupport;
059  }
060
061  public String toString() {
062    return getClass().getName() + ": " + getName();
063  }
064}