/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.facebook.presto.operator;
import com.facebook.presto.RowPagesBuilder;
import com.facebook.presto.spi.Page;
import it.unimi.dsi.fastutil.ints.IntComparator;
import org.testng.annotations.Test;
import java.util.Optional;
import static com.facebook.presto.spi.type.BigintType.BIGINT;
import static com.google.common.collect.Iterables.getOnlyElement;
import static org.testng.Assert.assertEquals;
public class TestPositionLinks
{
private static final Page TEST_PAGE = getOnlyElement(RowPagesBuilder.rowPagesBuilder(BIGINT).addSequencePage(20, 0).build());
@Test
public void testArrayPositionLinks()
{
PositionLinks.Builder builder = ArrayPositionLinks.builder(1000);
assertEquals(builder.link(1, 0), 1);
assertEquals(builder.link(2, 1), 2);
assertEquals(builder.link(3, 2), 3);
assertEquals(builder.link(11, 10), 11);
assertEquals(builder.link(12, 11), 12);
PositionLinks positionLinks = builder.build().apply(Optional.empty());
assertEquals(positionLinks.start(3, 0, TEST_PAGE), 3);
assertEquals(positionLinks.next(3, 0, TEST_PAGE), 2);
assertEquals(positionLinks.next(2, 0, TEST_PAGE), 1);
assertEquals(positionLinks.next(1, 0, TEST_PAGE), 0);
assertEquals(positionLinks.start(4, 0, TEST_PAGE), 4);
assertEquals(positionLinks.next(4, 0, TEST_PAGE), -1);
assertEquals(positionLinks.start(12, 0, TEST_PAGE), 12);
assertEquals(positionLinks.next(12, 0, TEST_PAGE), 11);
assertEquals(positionLinks.next(11, 0, TEST_PAGE), 10);
}
@Test
public void testSortedPositionLinks()
{
JoinFilterFunction filterFunction = new JoinFilterFunction()
{
@Override
public boolean filter(int leftAddress, int rightPosition, Page rightPage)
{
return BIGINT.getLong(rightPage.getBlock(0), leftAddress) > 4;
}
@Override
public Optional<Integer> getSortChannel()
{
throw new UnsupportedOperationException();
}
};
PositionLinks.Builder builder = buildSortedPositionLinks();
PositionLinks positionLinks = builder.build().apply(Optional.of(filterFunction));
assertEquals(positionLinks.start(0, 0, TEST_PAGE), 5);
assertEquals(positionLinks.next(5, 0, TEST_PAGE), 6);
assertEquals(positionLinks.next(6, 0, TEST_PAGE), -1);
assertEquals(positionLinks.start(10, 0, TEST_PAGE), 10);
assertEquals(positionLinks.next(10, 0, TEST_PAGE), 11);
assertEquals(positionLinks.next(11, 0, TEST_PAGE), 12);
assertEquals(positionLinks.next(12, 0, TEST_PAGE), -1);
}
@Test
public void testReverseSortedPositionLinks()
{
JoinFilterFunction filterFunction = new JoinFilterFunction()
{
@Override
public boolean filter(int leftAddress, int rightPosition, Page rightPage)
{
return BIGINT.getLong(rightPage.getBlock(0), leftAddress) < 4;
}
@Override
public Optional<Integer> getSortChannel()
{
throw new UnsupportedOperationException();
}
};
PositionLinks.Builder builder = buildSortedPositionLinks();
PositionLinks positionLinks = builder.build().apply(Optional.of(filterFunction));
assertEquals(positionLinks.start(0, 0, TEST_PAGE), 0);
assertEquals(positionLinks.next(0, 0, TEST_PAGE), 1);
assertEquals(positionLinks.next(1, 0, TEST_PAGE), 2);
assertEquals(positionLinks.next(2, 0, TEST_PAGE), 3);
assertEquals(positionLinks.next(3, 0, TEST_PAGE), -1);
assertEquals(positionLinks.start(10, 0, TEST_PAGE), -1);
}
private static PositionLinks.Builder buildSortedPositionLinks()
{
SortedPositionLinks.Builder builder = SortedPositionLinks.builder(
1000,
new IntComparator() {
@Override
public int compare(int left, int right)
{
return BIGINT.compareTo(TEST_PAGE.getBlock(0), left, TEST_PAGE.getBlock(0), right);
}
@Override
public int compare(Integer left, Integer right)
{
return compare(left.intValue(), right.intValue());
}
});
assertEquals(builder.link(4, 5), 4);
assertEquals(builder.link(6, 4), 4);
assertEquals(builder.link(2, 4), 2);
assertEquals(builder.link(3, 2), 2);
assertEquals(builder.link(0, 2), 0);
assertEquals(builder.link(1, 0), 0);
assertEquals(builder.link(10, 11), 10);
assertEquals(builder.link(12, 10), 10);
return builder;
}
}