content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 org.apache.carbondata.sdk.file;
  
  import java.io.File;
  import java.io.FileFilter;
  import java.io.IOException;
  import java.nio.ByteBuffer;
  import java.util.List;
  
  import org.apache.carbondata.core.constants.CarbonCommonConstants;
  import org.apache.carbondata.core.metadata.datatype.DataTypes;
  import org.apache.carbondata.core.metadata.datatype.Field;
  import org.apache.carbondata.core.reader.CarbonIndexFileReader;
  import org.apache.carbondata.format.BlockIndex;
  
  import org.apache.commons.io.FileUtils;
  import org.junit.After;
  import org.junit.Assert;
  import org.junit.Before;
  import org.junit.Test;
  
  /**
   * MinMaxTest
   */
  public class MinMaxTest {
    String path = "./testMinMax";
    @Before
    public void mkDir() throws IOException {
      File file = new File(path);
      FileUtils.deleteDirectory(file);
      FileUtils.forceMkdir(file);
    }
  
    @After
    public void deleteDir() throws IOException {
      FileUtils.deleteDirectory(new File(path));
    }
  
    @Test
    public void testMinMax() throws IOException {
      Field[] fields = new Field[6];
      fields[0] = new Field("byteField", DataTypes.BYTE);
      fields[1] = new Field("shortField", DataTypes.SHORT);
      fields[2] = new Field("infField", DataTypes.INT);
      fields[3] = new Field("longField", DataTypes.LONG);
      fields[4] = new Field("floatField", DataTypes.FLOAT);
      fields[5] = new Field("doubleField", DataTypes.DOUBLE);
      writeFilesAndVerify(new Schema(fields), path);
      readIndexAndVerify(path);
    }
  
    public static void writeFilesAndVerify(Schema schema, String path) {
      try {
        CarbonWriter writer =
            CarbonWriter
                .builder()
                .outputPath(path)
                .withCsvInput(schema)
                .writtenBy("TestUtil")
                .build();
        String[] row1 = new String[] {
            String.valueOf(Byte.MIN_VALUE),
            String.valueOf(Short.MIN_VALUE),
            String.valueOf(Integer.MIN_VALUE),
            String.valueOf(Long.MIN_VALUE),
            String.valueOf(Float.MIN_VALUE),
            String.valueOf(Double.MIN_VALUE)
        };
        for (int i = 0; i < 10; i++) {
          writer.write(row1);
        }
        String[] row2 = new String[] {
            String.valueOf(Byte.MAX_VALUE),
            String.valueOf(Short.MAX_VALUE),
            String.valueOf(Integer.MAX_VALUE),
            String.valueOf(Long.MAX_VALUE),
            String.valueOf(Float.MAX_VALUE),
            String.valueOf(Double.MAX_VALUE)
        };
        for (int i = 0; i < 26664; i++) {
          writer.write(row2);
        }
        String[] row3 = new String[] {
            String.valueOf(Byte.MAX_VALUE - 10),
            String.valueOf(Short.MAX_VALUE - 10),
            String.valueOf(Integer.MAX_VALUE - 10),
            String.valueOf(Long.MAX_VALUE - 10),
            String.valueOf(Float.MAX_VALUE - 10),
            String.valueOf(Double.MAX_VALUE - 10)
        };
        for (int i = 0; i < 6666; i++) {
          writer.write(row3);
        }
        writer.close();
      } catch (Exception e) {
        e.printStackTrace();
        Assert.assertTrue(false);
      }
      File[] dataFiles = new File(path).listFiles(new FileFilter() {
        @Override
        public boolean accept(File pathname) {
          return pathname.getName().endsWith(CarbonCommonConstants.FACT_FILE_EXT);
        }
      });
      Assert.assertTrue(dataFiles != null);
      Assert.assertTrue(dataFiles.length > 0);
    }
  
    public static void readIndexAndVerify(String path) {
      File[] dataFiles = new File(path).listFiles(new FileFilter() {
        @Override
        public boolean accept(File pathname) {
          return pathname.getName().endsWith(CarbonCommonConstants.UPDATE_INDEX_FILE_EXT);
        }
      });
      Assert.assertTrue(dataFiles != null);
      Assert.assertTrue(dataFiles.length > 0);
      CarbonIndexFileReader reader = new CarbonIndexFileReader();
      try {
        reader.openThriftReader(dataFiles[0].getCanonicalPath());
        reader.readIndexHeader();
        BlockIndex index = reader.readBlockIndexInfo();
        List<ByteBuffer> maxValues = index.block_index.min_max_index.max_values;
        Assert.assertEquals(Byte.MAX_VALUE, maxValues.get(0).get());
        maxValues.get(1).position(6);
        Assert.assertEquals(Short.MAX_VALUE, maxValues.get(1).getShort());
        maxValues.get(2).position(4);
        Assert.assertEquals(Integer.MAX_VALUE, maxValues.get(2).getInt());
        Assert.assertEquals(Long.MAX_VALUE, maxValues.get(3).getLong());
        Assert.assertTrue(Float.MAX_VALUE - maxValues.get(4).getFloat() < 1);
        Assert.assertTrue(Double.MAX_VALUE - maxValues.get(5).getDouble() < 1);
        List<ByteBuffer> minValues = index.block_index.min_max_index.min_values;
        Assert.assertEquals(Byte.MIN_VALUE, minValues.get(0).get());
        minValues.get(1).position(6);
        Assert.assertEquals(Short.MIN_VALUE, minValues.get(1).getShort());
        minValues.get(2).position(4);
        Assert.assertEquals(Integer.MIN_VALUE, minValues.get(2).getInt());
        Assert.assertEquals(Long.MIN_VALUE, minValues.get(3).getLong());
        Assert.assertTrue(minValues.get(4).getFloat() - Float.MIN_VALUE < 1);
        Assert.assertTrue(minValues.get(5).getDouble() - Double.MIN_VALUE < 1);
      } catch (IOException e) {
        e.printStackTrace();
        Assert.assertTrue(false);
      } finally {
        reader.closeThriftReader();
      }
    }
  }
  