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.arrow.adapter.jdbc.consumer;
  
  import static org.junit.jupiter.api.Assertions.assertArrayEquals;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.io.ByteArrayInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import org.apache.arrow.vector.BaseValueVector;
  import org.apache.arrow.vector.VarBinaryVector;
  import org.junit.jupiter.api.Test;
  
  public class BinaryConsumerTest extends AbstractConsumerTest {
  
    private static final int INITIAL_VALUE_ALLOCATION = BaseValueVector.INITIAL_VALUE_ALLOCATION;
    private static final int DEFAULT_RECORD_BYTE_COUNT = 8;
  
    interface InputStreamConsumer {
      void consume(BinaryConsumer consumer) throws IOException;
    }
  
    protected void assertConsume(boolean nullable, InputStreamConsumer dataConsumer, byte[][] expect)
        throws IOException {
      try (final VarBinaryVector vector = new VarBinaryVector("binary", allocator)) {
        BinaryConsumer consumer = BinaryConsumer.createConsumer(vector, 0, nullable);
        dataConsumer.consume(consumer);
        assertEquals(expect.length - 1, vector.getLastSet());
        for (int i = 0; i < expect.length; i++) {
          byte[] value = expect[i];
          if (value == null) {
            assertTrue(vector.isNull(i));
          } else {
            assertArrayEquals(expect[i], vector.get(i));
          }
        }
      }
    }
  
    private byte[] createBytes(int length) {
      byte[] bytes = new byte[length];
      for (int i = 0; i < length; i++) {
        bytes[i] = (byte) (i % 1024);
      }
      return bytes;
    }
  
    public void testConsumeInputStream(byte[][] values, boolean nullable) throws IOException {
      assertConsume(
          nullable,
          binaryConsumer -> {
            for (byte[] value : values) {
              if (value != null) {
                binaryConsumer.consume(new ByteArrayInputStream(value));
              } else {
                binaryConsumer.consume((InputStream) null);
              }
              binaryConsumer.moveWriterPosition();
            }
          },
          values);
    }
  
    @Test
    public void testConsumeInputStream() throws IOException {
      testConsumeInputStream(new byte[][] {createBytes(DEFAULT_RECORD_BYTE_COUNT)}, false);
  
      testConsumeInputStream(
          new byte[][] {
            createBytes(DEFAULT_RECORD_BYTE_COUNT), createBytes(DEFAULT_RECORD_BYTE_COUNT)
          },
          false);
  
      testConsumeInputStream(
          new byte[][] {
            createBytes(DEFAULT_RECORD_BYTE_COUNT * 2),
            createBytes(DEFAULT_RECORD_BYTE_COUNT),
            createBytes(DEFAULT_RECORD_BYTE_COUNT)
          },
          false);
  
      testConsumeInputStream(
          new byte[][] {createBytes(INITIAL_VALUE_ALLOCATION * DEFAULT_RECORD_BYTE_COUNT)}, false);
  
      testConsumeInputStream(
          new byte[][] {
            createBytes(INITIAL_VALUE_ALLOCATION * DEFAULT_RECORD_BYTE_COUNT * 10),
          },
          false);
  
      testConsumeInputStream(
          new byte[][] {
            createBytes(INITIAL_VALUE_ALLOCATION * DEFAULT_RECORD_BYTE_COUNT),
            createBytes(INITIAL_VALUE_ALLOCATION * DEFAULT_RECORD_BYTE_COUNT)
          },
          false);
  
      testConsumeInputStream(
          new byte[][] {
            createBytes(INITIAL_VALUE_ALLOCATION * DEFAULT_RECORD_BYTE_COUNT),
            createBytes(DEFAULT_RECORD_BYTE_COUNT),
            createBytes(INITIAL_VALUE_ALLOCATION * DEFAULT_RECORD_BYTE_COUNT)
          },
          false);
  
      byte[][] testRecords = new byte[INITIAL_VALUE_ALLOCATION * 2][];
      for (int i = 0; i < testRecords.length; i++) {
        testRecords[i] = createBytes(DEFAULT_RECORD_BYTE_COUNT);
      }
      testConsumeInputStream(testRecords, false);
  
      byte[] bytes1 = new byte[] {1, 2, 3};
      byte[] bytes2 = new byte[] {4, 5, 6};
      testConsumeInputStream(new byte[][] {bytes1, null, bytes2}, true);
    }
  }
  