@Test
public void test() {
FilterFactoryImpl factory = new FilterFactoryImpl();
Expression exp1 = factory.createAttributeExpression(type,"pid");
Expression exp2 = factory.createLiteralExpression("a89dhd-123-abc");
Filter f = factory.equal(exp1, exp2, false);
String ss = FilterToCQLTool.toCQL(f);
assertTrue(ss.contains("'a89dhd-123-abc'"));
}