/**
* Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
*
* 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.linkedin.pinot.index.writer;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.RandomAccessFile;
import java.util.Random;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.testng.Assert;
import org.testng.annotations.Test;
import com.linkedin.pinot.core.io.writer.impl.FixedBitSingleColumnMultiValueWriter;
import com.linkedin.pinot.core.util.CustomBitSet;
public class FixedBitWidthSingleColumnMultiValueWriterTest {
private static final Logger LOGGER = LoggerFactory.getLogger(FixedBitWidthSingleColumnMultiValueWriterTest.class);
@Test
public void testSingleColMultiValue() throws Exception {
int maxBits = 2;
while (maxBits < 32) {
LOGGER.trace("START test maxBit:" + maxBits);
File file = new File("test_single_col_multi_value_writer.dat");
file.delete();
int rows = 100;
int[][] data = new int[rows][];
int maxValue = (int) Math.pow(2, maxBits);
Random r = new Random();
int totalNumValues = 0;
for (int i = 0; i < rows; i++) {
int numValues = r.nextInt(100) + 1;
data[i] = new int[numValues];
for (int j = 0; j < numValues; j++) {
data[i][j] = r.nextInt(maxValue);
}
totalNumValues += numValues;
}
FixedBitSingleColumnMultiValueWriter writer = new FixedBitSingleColumnMultiValueWriter(
file, rows, totalNumValues, maxBits);
CustomBitSet bitSet = CustomBitSet
.withBitLength(totalNumValues * maxBits);
int index = 0;
for (int i = 0; i < rows; i++) {
writer.setIntArray(i, data[i]);
for (int j = 0; j < data[i].length; j++) {
int value = data[i][j];
for (int bitPos = maxBits - 1; bitPos >= 0; bitPos--) {
if ((value & (1 << bitPos)) != 0) {
bitSet.setBit(index * maxBits + (maxBits - bitPos - 1));
}
}
index = index + 1;
}
}
writer.close();
// verify header
DataInputStream dis = new DataInputStream(new FileInputStream(file));
int totalLength = 0;
for (int i = 0; i < rows; i++) {
Assert.assertEquals(dis.readInt(), totalLength);
Assert.assertEquals(dis.readInt(), data[i].length);
totalLength += data[i].length;
}
dis.close();
// verify data
byte[] byteArray = bitSet.toByteArray();
RandomAccessFile raf = new RandomAccessFile(file, "r");
// Header contains 1 row for each doc and each row contains 2 ints
int headerSize = rows * 2 * 4;
int dataLength = (int) raf.length() - headerSize;
byte[] b = new byte[dataLength];
// read the data segment that starts after the header.
raf.seek(headerSize);
raf.read(b, 0, dataLength);
Assert.assertEquals(byteArray.length, b.length);
Assert.assertEquals(byteArray, b);
raf.close();
file.delete();
LOGGER.trace("END test maxBit:" + maxBits);
maxBits = maxBits + 1;
bitSet.close();
}
}
}