/*
* Druid - a distributed column store.
* Copyright (C) 2012, 2013 Metamarkets Group Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package io.druid.segment;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.metamx.collections.bitmap.ConciseBitmapFactory;
import io.druid.granularity.QueryGranularity;
import io.druid.query.TestQueryRunners;
import io.druid.query.aggregation.AggregatorFactory;
import io.druid.segment.column.Column;
import io.druid.segment.incremental.IncrementalIndex;
import io.druid.segment.incremental.IncrementalIndexAdapter;
import org.joda.time.Interval;
import org.junit.Assert;
import org.junit.Test;
import java.io.File;
public class EmptyIndexTest
{
@Test
public void testEmptyIndex() throws Exception
{
File tmpDir = File.createTempFile("emptyIndex", "");
if (!tmpDir.delete()) {
throw new IllegalStateException("tmp delete failed");
}
if (!tmpDir.mkdir()) {
throw new IllegalStateException("tmp mkdir failed");
}
tmpDir.deleteOnExit();
IncrementalIndex emptyIndex = new IncrementalIndex(
0,
QueryGranularity.NONE,
new AggregatorFactory[0],
TestQueryRunners.pool
);
IncrementalIndexAdapter emptyIndexAdapter = new IncrementalIndexAdapter(
new Interval("2012-08-01/P3D"),
emptyIndex,
new ConciseBitmapFactory()
);
IndexMerger.merge(
Lists.<IndexableAdapter>newArrayList(emptyIndexAdapter),
new AggregatorFactory[0],
tmpDir
);
QueryableIndex emptyQueryableIndex = IndexIO.loadIndex(tmpDir);
Assert.assertEquals("getDimensionNames", 0, Iterables.size(emptyQueryableIndex.getAvailableDimensions()));
Assert.assertEquals("getMetricNames", 0, Iterables.size(emptyQueryableIndex.getColumnNames()));
Assert.assertEquals("getDataInterval", new Interval("2012-08-01/P3D"), emptyQueryableIndex.getDataInterval());
Assert.assertEquals("getReadOnlyTimestamps", 0, emptyQueryableIndex.getColumn(Column.TIME_COLUMN_NAME).getLength());
}
}