- fixed incompleteness + bug in inverse()

src/fr/inrialpes/exmo/align/impl/edoal/EDOALCell.java

@@ -114,12 +114,18 @@ public class EDOALCell extends BasicCell {
 	return linkkeys;
     }
 
-    public Cell inverse() throws AlignmentException {
+    public EDOALCell inverse() throws AlignmentException {
 	EDOALCell invcell = new EDOALCell( (String)null, (Expression)object2, (Expression)object1, relation.inverse(), strength );
-	for ( Transformation trsf : transformations ) {
-	    invcell.addTransformation( trsf.inverse() );
+	if ( transformations != null ) {
+	    for ( Transformation trsf : transformations ) {
+		invcell.addTransformation( trsf.inverse() );
+	    }
+	}
+	if ( linkkeys != null ) {
+	    for ( Linkkey lk : linkkeys ) {
+		invcell.addLinkkey( lk.inverse() );
+	    }
 	}
-	// The same should be done for the measure
 	return invcell;
     }