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.IOException;
  import java.nio.charset.StandardCharsets;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.TimeZone;
  
  import org.apache.carbondata.core.memory.CarbonUnsafe;
  import org.apache.carbondata.core.metadata.datatype.DataTypes;
  import org.apache.carbondata.core.metadata.datatype.Field;
  import org.apache.carbondata.sdk.file.arrow.ArrowConverter;
  import org.apache.carbondata.sdk.file.arrow.ArrowUtils;
  
  import junit.framework.TestCase;
  import org.apache.arrow.memory.BufferAllocator;
  import org.apache.arrow.vector.FieldVector;
  import org.apache.arrow.vector.Float4Vector;
  import org.apache.arrow.vector.SmallIntVector;
  import org.apache.arrow.vector.VarCharVector;
  import org.apache.arrow.vector.VectorLoader;
  import org.apache.arrow.vector.VectorSchemaRoot;
  import org.apache.arrow.vector.ipc.message.ArrowRecordBatch;
  import org.apache.commons.io.FileUtils;
  import org.junit.Assert;
  import org.junit.Test;
  
  import static org.junit.Assert.assertArrayEquals;
  
  public class ArrowCarbonReaderTest extends TestCase {
  
    @Test
    public void testArrowReader() {
      String path = "./carbondata";
      try {
        FileUtils.deleteDirectory(new File(path));
  
        Field[] fields = new Field[13];
        fields[0] = new Field("stringField", DataTypes.STRING);
        fields[1] = new Field("shortField", DataTypes.SHORT);
        fields[2] = new Field("intField", DataTypes.INT);
        fields[3] = new Field("longField", DataTypes.LONG);
        fields[4] = new Field("doubleField", DataTypes.DOUBLE);
        fields[5] = new Field("boolField", DataTypes.BOOLEAN);
        fields[6] = new Field("dateField", DataTypes.DATE);
        fields[7] = new Field("timeField", DataTypes.TIMESTAMP);
        fields[8] = new Field("decimalField", DataTypes.createDecimalType(8, 2));
        fields[9] = new Field("varcharField", DataTypes.VARCHAR);
        fields[10] = new Field("arrayField", DataTypes.createArrayType(DataTypes.STRING));
        fields[11] = new Field("floatField", DataTypes.FLOAT);
        fields[12] = new Field("binaryField", DataTypes.BINARY);
        Map<String, String> map = new HashMap<>();
        map.put("complex_delimiter_level_1", "#");
        CarbonWriter writer = CarbonWriter.builder()
            .outputPath(path)
            .withLoadOptions(map)
            .withCsvInput(new Schema(fields))
            .writtenBy("CarbonReaderTest")
            .build();
        byte[] value = "Binary".getBytes();
        for (int i = 0; i < 10; i++) {
          Object[] row2 = new Object[]{
              "robot" + (i % 10),
              i % 10000,
              i,
              (Long.MAX_VALUE - i),
              ((double) i / 2),
              (true),
              "2019-03-02",
              "2019-02-12 03:03:34",
              12.345,
              "varchar",
              "Hello#World#From#Carbon",
              1.23,
              value
          };
          writer.write(row2);
        }
        writer.close();
        // Read data
        ArrowCarbonReader reader =
            CarbonReader.builder(path, "_temp").withRowRecordReader().buildArrowReader();
        Schema carbonSchema = CarbonSchemaReader.readSchema(path);
        byte[] data = reader.readArrowBatch(carbonSchema);
        BufferAllocator bufferAllocator = ArrowUtils.ROOT_ALLOCATOR
          .newChildAllocator("toArrowBuffer", 0, Long.MAX_VALUE);
        ArrowRecordBatch arrowRecordBatch =
            ArrowConverter.byteArrayToArrowBatch(data, bufferAllocator);
        VectorSchemaRoot vectorSchemaRoot = VectorSchemaRoot
            .create(ArrowUtils.toArrowSchema(carbonSchema, TimeZone.getDefault().getID()),
                bufferAllocator);
        VectorLoader vectorLoader = new VectorLoader(vectorSchemaRoot);
        vectorLoader.load(arrowRecordBatch);
        // check for 10 rows
        assertEquals(vectorSchemaRoot.getRowCount(), 10);
        List<FieldVector> fieldVectors = vectorSchemaRoot.getFieldVectors();
        // validate short column
        for (int i = 0; i < vectorSchemaRoot.getRowCount(); i++) {
          assertEquals(((SmallIntVector)fieldVectors.get(6)).get(i), i);
        }
        // validate float column
        for (int i = 0; i < vectorSchemaRoot.getRowCount(); i++) {
          assertEquals(((Float4Vector)fieldVectors.get(12)).get(i), (float) 1.23);
        }
        // validate date column
        for (int i = 0; i < vectorSchemaRoot.getRowCount(); i++) {
          assertArrayEquals(((VarCharVector)fieldVectors.get(1)).get(i),
                  "2019-03-02".getBytes((StandardCharsets.UTF_8)));
        }
        // validate timestamp column
        for (int i = 0; i < vectorSchemaRoot.getRowCount(); i++) {
          assertArrayEquals(((VarCharVector)fieldVectors.get(2)).get(i),
                  "2019-02-12 03:03:34".getBytes((StandardCharsets.UTF_8)));
        }
        arrowRecordBatch.close();
        vectorSchemaRoot.close();
        bufferAllocator.close();
        reader.close();
  
        // Read data with address (unsafe memory)
        ArrowCarbonReader reader1 =
            CarbonReader.builder(path, "_temp").withRowRecordReader().buildArrowReader();
        long address = reader1.readArrowBatchAddress(carbonSchema);
        int length = CarbonUnsafe.getUnsafe().getInt(address);
        byte[] data1 = new byte[length];
        CarbonUnsafe.getUnsafe().copyMemory(null, address + 4 , data1, CarbonUnsafe.BYTE_ARRAY_OFFSET, length);
        bufferAllocator = ArrowUtils.ROOT_ALLOCATOR.newChildAllocator("toArrowBuffer", 0, Long.MAX_VALUE);
        arrowRecordBatch =
            ArrowConverter.byteArrayToArrowBatch(data1, bufferAllocator);
        vectorSchemaRoot = VectorSchemaRoot
            .create(ArrowUtils.toArrowSchema(carbonSchema, TimeZone.getDefault().getID()),
                bufferAllocator);
        vectorLoader = new VectorLoader(vectorSchemaRoot);
        vectorLoader.load(arrowRecordBatch);
        // check for 10 rows
        assertEquals(vectorSchemaRoot.getRowCount(), 10);
        List<FieldVector> fieldVectors1 = vectorSchemaRoot.getFieldVectors();
        // validate short column
        for (int i = 0; i < vectorSchemaRoot.getRowCount(); i++) {
          assertEquals(((SmallIntVector)fieldVectors1.get(6)).get(i), i);
        }
        // validate float column
        for (int i = 0; i < vectorSchemaRoot.getRowCount(); i++) {
          assertEquals(((Float4Vector)fieldVectors1.get(12)).get(i), (float) 1.23);
        }
        arrowRecordBatch.close();
        vectorSchemaRoot.close();
        bufferAllocator.close();
        // free the unsafe memory
        reader1.freeArrowBatchMemory(address);
        reader1.close();
  
  
        // Read as arrow vector
        ArrowCarbonReader reader2 =
            CarbonReader.builder(path, "_temp").withRowRecordReader().buildArrowReader();
        VectorSchemaRoot vectorSchemaRoot2 = reader2.readArrowVectors(carbonSchema);
        // check for 10 rows
        assertEquals(vectorSchemaRoot2.getRowCount(), 10);
        List<FieldVector> fieldVectors2 = vectorSchemaRoot2.getFieldVectors();
        // validate short column
        for (int i = 0; i < vectorSchemaRoot2.getRowCount(); i++) {
          assertEquals(((SmallIntVector)fieldVectors2.get(6)).get(i), i);
        }
        // validate float column
        for (int i = 0; i < vectorSchemaRoot2.getRowCount(); i++) {
          assertEquals(((Float4Vector)fieldVectors2.get(12)).get(i), (float) 1.23);
        }
        vectorSchemaRoot.close();
        reader2.close();
  
        // Read arrowSchema
        byte[] schema = CarbonSchemaReader.getArrowSchemaAsBytes(path);
        bufferAllocator = ArrowUtils.ROOT_ALLOCATOR.newChildAllocator("toArrowBuffer", 0, Long.MAX_VALUE);
        arrowRecordBatch =
            ArrowConverter.byteArrayToArrowBatch(schema, bufferAllocator);
        vectorSchemaRoot = VectorSchemaRoot
            .create(ArrowUtils.toArrowSchema(carbonSchema, TimeZone.getDefault().getID()),
                bufferAllocator);
        vectorLoader = new VectorLoader(vectorSchemaRoot);
        vectorLoader.load(arrowRecordBatch);
        assertEquals(vectorSchemaRoot.getSchema().getFields().size(), 13);
        arrowRecordBatch.close();
        vectorSchemaRoot.close();
        bufferAllocator.close();
      } catch (Throwable e) {
        e.printStackTrace();
        Assert.fail(e.getMessage());
      } finally {
        try {
          FileUtils.deleteDirectory(new File(path));
        } catch (IOException e) {
          e.printStackTrace();
          Assert.fail(e.getMessage());
        }
      }
    }
  }
  