geom = gf.createPolygon(gf.createLinearRing(coords), new LinearRing[0]);
expr1 = new LiteralExpressionImpl(geom);
filter = fac.contains(expr1, expr2);
LOGGER.finer( filter.toString());
LOGGER.finer( "contains feature: " + filter.evaluate(testFeature));
assertFalse(filter.evaluate(testFeature));
filter = fac.contains(new LiteralExpressionImpl(null), expr2);
LOGGER.finer( filter.toString());