@Test
public void testDateMath() {
// Create a collection of Order objects, with shipDates 2015-08-01, 2015-08-02 and 2015-08-03...
IndexedCollection<Order> collection = new ConcurrentIndexedCollection<Order>();
collection.add(createOrder("2015-08-01"));
collection.add(createOrder("2015-08-02"));
collection.add(createOrder("2015-08-03"));
// Create a parser for CQN queries on Order objects...
CQNParser<Order> parser =
CQNParser.forPojoWithAttributes(Order.class, createAttributes(Order.class));
// Register a DateMathParser which can parse date math expressions
// relative to the given date value for "now" ("2015-08-04").
// The custom value for "now" can be omitted to have it always calculate relative to the current
// time...
parser.registerValueParser(Date.class, new DateMathParser(createDate("2015-08-04")));
// Retrieve orders whose ship date is between 3 days ago and 2 days ago...
ResultSet<Order> results =
parser.retrieve(collection, "between(\"shipDate\", \"-3DAYS\", \"-2DAYS\")");
// Assert that the following two orders are returned...
Assert.assertTrue(results.contains(createOrder("2015-08-01")));
Assert.assertTrue(results.contains(createOrder("2015-08-02")));
Assert.assertEquals(2, results.size());
}
public static void main(String[] args) {
IndexedCollection<Car> cars = new ConcurrentIndexedCollection<Car>();
cars.addAll(CarFactory.createCollectionOfCars(100000));
cars.addIndex(NavigableIndex.onAttribute(Car.CAR_ID));
QueryLog queryLog = new QueryLog(System.out);
ResultSet<Car> resultSet =
cars.retrieve(
has(Car.CAR_ID),
queryOptions(
orderBy(descending(Car.CAR_ID)),
queryLog,
applyThresholds(threshold(INDEX_ORDERING_SELECTIVITY, 1.0))));
{
long start = System.currentTimeMillis();
int count = IteratorUtil.countElements(resultSet);
long timeTaken = System.currentTimeMillis() - start;
System.out.println("Time taken for " + count + " results: " + timeTaken);
}
System.out.println();
{
long start = System.currentTimeMillis();
int count = IteratorUtil.countElements(resultSet);
long timeTaken = System.currentTimeMillis() - start;
System.out.println("Time taken for " + count + " results: " + timeTaken);
}
}
