[Biojava-l] Cast to Sequence

[Jacob Rohde]

Hi,

I'm having a problem with a JTree and rendering of Sequences.

Since the JTree calls toString() on objects when displaying them, I
had to make my own TreeCellRenderer because the Sequence toString
method prints out debug info.

My code looks like this:

public class FeatureTreeCellRenderer extends DefaultTreeCellRenderer 
{
  public Component getTreeCellRendererComponent(JTree tree, Object value,
    boolean sel, boolean expanded, boolean leaf, int row, boolean hasFocus)
  {
    JLabel l = (JLabel) super.getTreeCellRendererComponent(tree,
      value, sel, expanded, leaf, row, hasFocus);
    
    if(leaf)
    {
      System.out.println(value);
      Sequence s = (Sequence) value;            
      l.setText(s.getName());
    }
    return l;
  }
}

My problem is that I always get a ClassCastException. The weird thing
is that the println method call above the cast clearly shows that the
cast should be possible.

This is the output of the pint statement:

org.biojava.bio.seq.impl.SimpleSequence at 2ba11b name: DNA seq 0

And this is the exception:

Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException:
javax.swing.tree.DefaultMutableTreeNode
.
etc.
etc.

I'm so confused. Any ideas?

Thanks in advance,
Jacob Rohde