Java Code Examples for com.googlecode.cqengine.resultset.ResultSet#getMergeCost()

The following examples show how to use com.googlecode.cqengine.resultset.ResultSet#getMergeCost() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: QueryCostComparators.java    From cqengine with Apache License 2.0 5 votes vote down vote up 
@Override
public int compare(ResultSet o1, ResultSet o2) {
    final int o1MergeCost = o1.getMergeCost();
    final int o2MergeCost = o2.getMergeCost();
    if (o1MergeCost < o2MergeCost) {
        return -1;
    }
    else if (o1MergeCost > o2MergeCost) {
        return +1;
    }
    else {
        return 0;
    }
}
Example 2
Source File: ResultSetUnionAll.java    From cqengine with Apache License 2.0 5 votes vote down vote up 
/**
 * Returns the sum of the merge costs of the the underlying {@code ResultSet}s.
 * @return the sum of the merge costs of the the underlying {@code ResultSet}s
 */
@Override
public int getMergeCost() {
    long mergeCost = 0;
    for (ResultSet<O> resultSet : this.resultSets) {
        mergeCost = mergeCost + resultSet.getMergeCost();
    }
    return (int)Math.min(mergeCost, Integer.MAX_VALUE);
}
Example 3
Source File: ResultSetIntersection.java    From cqengine with Apache License 2.0 5 votes vote down vote up 
/**
 * Returns the merge cost from the underlying {@code ResultSet} with the lowest merge cost.
 * @return the merge cost from the underlying {@code ResultSet} with the lowest merge cost
 */
@Override
public int getMergeCost() {
    if (resultSets.isEmpty()) {
        return 0;
    }
    else {
        ResultSet<O> lowestMergeCostResultSet = resultSets.get(0);
        return lowestMergeCostResultSet.getMergeCost();
    }
}
Example 4
Source File: ResultSetUnion.java    From cqengine with Apache License 2.0 5 votes vote down vote up 
/**
 * Returns the sum of the merge costs of the the underlying {@code ResultSet}s.
 * @return the sum of the merge costs of the the underlying {@code ResultSet}s
 */
@Override
public int getMergeCost() {
    long mergeCost = 0;
    for (ResultSet<O> resultSet : this.resultSets) {
        mergeCost = mergeCost + resultSet.getMergeCost();
    }
    return (int)Math.min(mergeCost, Integer.MAX_VALUE);
}
Example 5
Source File: SQLiteIndexTest.java    From cqengine with Apache License 2.0 5 votes vote down vote up 
@Test
public void testNewResultSet_GetMergeCost() throws Exception{

    // Mocks
    ConnectionManager connectionManager = mock(ConnectionManager.class);
    Connection connection = mock(Connection.class);
    PreparedStatement preparedStatement = mock(PreparedStatement.class);
    java.sql.ResultSet resultSet = mock(java.sql.ResultSet.class);

    // Behaviour
    when(connectionManager.getConnection(any(SQLiteIndex.class), anyQueryOptions())).thenReturn(connection);
    when(connection.prepareStatement("SELECT COUNT(objectKey) FROM " + TABLE_NAME + " WHERE value = ?;")).thenReturn(preparedStatement);
    when(preparedStatement.executeQuery()).thenReturn(resultSet);
    when(resultSet.getStatement()).thenReturn(preparedStatement);
    when(resultSet.next()).thenReturn(true);
    when(resultSet.getInt(1)).thenReturn(3);

    // Iterator
    ResultSet<Car> carsWithAbs = new SQLiteIndex<String, Car, Integer>(
            Car.FEATURES,
            OBJECT_TO_ID,
            ID_TO_OBJECT,
            "")

            .retrieve(equal(Car.FEATURES, "abs"), createQueryOptions(connectionManager));

    assertNotNull(carsWithAbs);
    int size = carsWithAbs.getMergeCost();

    assertEquals(3, size);
    verify(connection, times(0)).close();

}
Example 6
Source File: SQLiteIndexTest.java    From cqengine with Apache License 2.0 5 votes vote down vote up 
@Test
public void testNewResultSet_FilterQuery_GetMergeCost() throws Exception{

    // Mocks
    FilterQuery<Car, String> filterQuery = mockFilterQuery();
    ConnectionManager connectionManager = mock(ConnectionManager.class);
    Connection connection = mock(Connection.class);
    PreparedStatement preparedStatement = mock(PreparedStatement.class);
    java.sql.ResultSet resultSet = mock(java.sql.ResultSet.class);

    // Behaviour
    when(connectionManager.getConnection(any(SQLiteIndex.class), anyQueryOptions())).thenReturn(connection);
    when(connection.prepareStatement("SELECT COUNT(objectKey) FROM " + TABLE_NAME + " ;")).thenReturn(preparedStatement);
    when(preparedStatement.executeQuery()).thenReturn(resultSet);
    when(resultSet.getStatement()).thenReturn(preparedStatement);
    when(resultSet.next()).thenReturn(true);
    when(resultSet.getInt(1)).thenReturn(3);

    // Iterator
    ResultSet<Car> cars = new SQLiteIndex<String, Car, Integer>(
            Car.FEATURES,
            OBJECT_TO_ID,
            ID_TO_OBJECT,
            "")

            .retrieve(filterQuery, createQueryOptions(connectionManager));

    assertNotNull(cars);
    int mergeCost = cars.getMergeCost();

    assertEquals(3, mergeCost);
    verify(connection, times(0)).close();
}