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