intialise in getSegmentRangeStore if store is null

git-svn-id: svn+ssh://svn.internal.sanger.ac.uk/repos/svn/pathsoft/artemis/trunk@5262 ee4ac58c-ac51-4696-9907-e4b3aa274f04

uk/ac/sanger/artemis/io/GFFStreamFeature.java

@@ -20,7 +20,7 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  *
- * $Header: //tmp/pathsoft/artemis/uk/ac/sanger/artemis/io/GFFStreamFeature.java,v 1.44 2006-11-21 16:34:51 tjc Exp $
+ * $Header: //tmp/pathsoft/artemis/uk/ac/sanger/artemis/io/GFFStreamFeature.java,v 1.45 2007-01-30 17:26:13 tjc Exp $
  */
 
 package uk.ac.sanger.artemis.io;
@@ -40,7 +40,7 @@ import java.text.SimpleDateFormat;
  *  A StreamFeature that thinks it is a GFF feature.
  *
  *  @author Kim Rutherford
- *  @version $Id: GFFStreamFeature.java,v 1.44 2006-11-21 16:34:51 tjc Exp $
+ *  @version $Id: GFFStreamFeature.java,v 1.45 2007-01-30 17:26:13 tjc Exp $
  **/
 
 public class GFFStreamFeature extends SimpleDocumentFeature
@@ -290,6 +290,12 @@ public class GFFStreamFeature extends SimpleDocumentFeature
 
   public Hashtable getSegmentRangeStore()
   {
+    if(id_range_store == null)
+    {
+      id_range_store = new Hashtable();
+      id_range_store.put((String)this.getQualifierByName("ID").getValues().get(0), 
+                         this.getLocation().getTotalRange());
+    }
     return id_range_store;
   }