byte[] value3 = Bytes.toBytes("value3");
Comparison.Operator operator3 = Comparison.Operator.LT;
Expression expression1 = new Or(
new Comparison(columnName1, qualifer1, operator1, value1),
new And(
new Comparison(columnName2, qualifer2, operator2, value2),
new Comparison(columnName3, qualifer3, operator3, value3)
)
);