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.vector.util;
  
  import static org.apache.arrow.vector.util.TestVectorAppender.assertVectorsEqual;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  import org.apache.arrow.memory.BufferAllocator;
  import org.apache.arrow.memory.RootAllocator;
  import org.apache.arrow.vector.BigIntVector;
  import org.apache.arrow.vector.IntVector;
  import org.apache.arrow.vector.VarCharVector;
  import org.apache.arrow.vector.VectorSchemaRoot;
  import org.apache.arrow.vector.testing.ValueVectorDataPopulator;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  /** Test cases for {@link VectorSchemaRootAppender}. */
  public class TestVectorSchemaRootAppender {
  
    private BufferAllocator allocator;
  
    @BeforeEach
    public void prepare() {
      allocator = new RootAllocator(1024 * 1024);
    }
  
    @AfterEach
    public void shutdown() {
      allocator.close();
    }
  
    @Test
    public void testVectorSchemaRootAppend() {
      final int length1 = 5;
      final int length2 = 3;
      final int length3 = 2;
  
      try (IntVector targetChild1 = new IntVector("t1", allocator);
          VarCharVector targetChild2 = new VarCharVector("t2", allocator);
          BigIntVector targetChild3 = new BigIntVector("t3", allocator);
          IntVector deltaChildOne1 = new IntVector("do1", allocator);
          VarCharVector deltaChildOne2 = new VarCharVector("do2", allocator);
          BigIntVector deltaChildOne3 = new BigIntVector("do3", allocator);
          IntVector deltaChildTwo1 = new IntVector("dt1", allocator);
          VarCharVector deltaChildTwo2 = new VarCharVector("dt2", allocator);
          BigIntVector deltaChildTwo3 = new BigIntVector("dt3", allocator)) {
  
        ValueVectorDataPopulator.setVector(targetChild1, 0, 1, null, 3, 4);
        ValueVectorDataPopulator.setVector(targetChild2, "zero", "one", null, "three", "four");
        ValueVectorDataPopulator.setVector(targetChild3, 0L, 10L, null, 30L, 40L);
        VectorSchemaRoot root1 = VectorSchemaRoot.of(targetChild1, targetChild2, targetChild3);
        root1.setRowCount(length1);
  
        ValueVectorDataPopulator.setVector(deltaChildOne1, 5, 6, 7);
        ValueVectorDataPopulator.setVector(deltaChildOne2, "five", "six", "seven");
        ValueVectorDataPopulator.setVector(deltaChildOne3, 50L, 60L, 70L);
        VectorSchemaRoot root2 = VectorSchemaRoot.of(deltaChildOne1, deltaChildOne2, deltaChildOne3);
        root2.setRowCount(length2);
  
        ValueVectorDataPopulator.setVector(deltaChildTwo1, null, 9);
        ValueVectorDataPopulator.setVector(deltaChildTwo2, null, "nine");
        ValueVectorDataPopulator.setVector(deltaChildTwo3, null, 90L);
        VectorSchemaRoot root3 = VectorSchemaRoot.of(deltaChildTwo1, deltaChildTwo2, deltaChildTwo3);
        root3.setRowCount(length3);
  
        VectorSchemaRootAppender.append(root1, root2, root3);
        assertEquals(length1 + length2 + length3, root1.getRowCount());
        assertEquals(3, root1.getFieldVectors().size());
  
        try (IntVector expected1 = new IntVector("", allocator);
            VarCharVector expected2 = new VarCharVector("", allocator);
            BigIntVector expected3 = new BigIntVector("", allocator)) {
  
          ValueVectorDataPopulator.setVector(expected1, 0, 1, null, 3, 4, 5, 6, 7, null, 9);
          ValueVectorDataPopulator.setVector(
              expected2, "zero", "one", null, "three", "four", "five", "six", "seven", null, "nine");
          ValueVectorDataPopulator.setVector(
              expected3, 0L, 10L, null, 30L, 40L, 50L, 60L, 70L, null, 90L);
  
          assertVectorsEqual(expected1, root1.getVector(0));
          assertVectorsEqual(expected2, root1.getVector(1));
          assertVectorsEqual(expected3, root1.getVector(2));
        }
      }
    }
  
    @Test
    public void testRootWithDifferentChildCounts() {
      try (IntVector targetChild1 = new IntVector("t1", allocator);
          VarCharVector targetChild2 = new VarCharVector("t2", allocator);
          BigIntVector targetChild3 = new BigIntVector("t3", allocator);
          IntVector deltaChild1 = new IntVector("d1", allocator);
          VarCharVector deltaChild2 = new VarCharVector("d2", allocator)) {
  
        ValueVectorDataPopulator.setVector(targetChild1, 0, 1, null, 3, 4);
        ValueVectorDataPopulator.setVector(targetChild2, "zero", "one", null, "three", "four");
        ValueVectorDataPopulator.setVector(targetChild3, 0L, 10L, null, 30L, 40L);
        VectorSchemaRoot root1 = VectorSchemaRoot.of(targetChild1, targetChild2, targetChild3);
        root1.setRowCount(5);
  
        ValueVectorDataPopulator.setVector(deltaChild1, 5, 6, 7);
        ValueVectorDataPopulator.setVector(deltaChild2, "five", "six", "seven");
        VectorSchemaRoot root2 = VectorSchemaRoot.of(deltaChild1, deltaChild2);
        root2.setRowCount(3);
  
        IllegalArgumentException exp =
            assertThrows(
                IllegalArgumentException.class, () -> VectorSchemaRootAppender.append(root1, root2));
  
        assertEquals(
            "Vector schema roots have different numbers of child vectors.", exp.getMessage());
      }
    }
  
    @Test
    public void testRootWithDifferentChildTypes() {
      try (IntVector targetChild1 = new IntVector("t1", allocator);
          VarCharVector targetChild2 = new VarCharVector("t2", allocator);
          IntVector deltaChild1 = new IntVector("d1", allocator);
          VarCharVector deltaChild2 = new VarCharVector("d2", allocator)) {
  
        ValueVectorDataPopulator.setVector(targetChild1, 0, 1, null, 3, 4);
        ValueVectorDataPopulator.setVector(targetChild2, "zero", "one", null, "three", "four");
        VectorSchemaRoot root1 = VectorSchemaRoot.of(targetChild1, targetChild2);
        root1.setRowCount(5);
  
        ValueVectorDataPopulator.setVector(deltaChild1, 5, 6, 7);
        ValueVectorDataPopulator.setVector(deltaChild2, "five", "six", "seven");
  
        // note that the child vectors are in reverse order
        VectorSchemaRoot root2 = VectorSchemaRoot.of(deltaChild2, deltaChild1);
        root2.setRowCount(3);
  
        IllegalArgumentException exp =
            assertThrows(
                IllegalArgumentException.class, () -> VectorSchemaRootAppender.append(root1, root2));
  
        assertEquals("Vector schema roots have different schemas.", exp.getMessage());
      }
    }
  }
  