/*
* (C) 2001 by Argonne National Laboratory
* See COPYRIGHT in top-level directory.
*/
/*
* @author Anthony Chan
*/
package logformat.slog2;
import java.util.List;
import java.util.Iterator;
import java.util.ListIterator;
import base.drawable.TimeBoundingBox;
import base.drawable.Drawable;
/*
Iterator of Drawables in a given List in Decreasing StartTime order.
The drawable returned by next() overlaps with the timeframe specified.
*/
public class IteratorOfBackDrawables implements Iterator
{
private ListIterator drawables_itr;
private TimeBoundingBox timeframe;
private Drawable next_drawable;
public IteratorOfBackDrawables( List dobjs_list,
final TimeBoundingBox tframe )
{
drawables_itr = dobjs_list.listIterator( dobjs_list.size() );
timeframe = tframe;
next_drawable = this.getNextInQueue();
}
private Drawable getNextInQueue()
{
Drawable next_dobj;
while ( drawables_itr.hasPrevious() ) {
next_dobj = (Drawable) drawables_itr.previous();
if ( next_dobj.overlaps( timeframe ) )
return next_dobj;
}
return null;
}
public boolean hasNext()
{
return next_drawable != null;
}
public Object next()
{
Drawable returning_dobj;
returning_dobj = next_drawable;
next_drawable = this.getNextInQueue();
return returning_dobj;
}
public void remove() {}
} // private class IteratorOfBackDrawables