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.ipc;
  
  import static java.util.Arrays.asList;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import com.google.flatbuffers.FlatBufferBuilder;
  import java.nio.ByteBuffer;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  import org.apache.arrow.flatbuf.Footer;
  import org.apache.arrow.vector.ipc.message.ArrowBlock;
  import org.apache.arrow.vector.ipc.message.ArrowFooter;
  import org.apache.arrow.vector.types.pojo.ArrowType;
  import org.apache.arrow.vector.types.pojo.Field;
  import org.apache.arrow.vector.types.pojo.FieldType;
  import org.apache.arrow.vector.types.pojo.Schema;
  import org.junit.jupiter.api.Test;
  
  public class TestArrowFooter {
  
    @Test
    public void test() {
      Schema schema =
          new Schema(
              asList(
                  new Field(
                      "a",
                      FieldType.nullable(new ArrowType.Int(8, true)),
                      Collections.<Field>emptyList())));
      ArrowFooter footer =
          new ArrowFooter(
              schema, Collections.<ArrowBlock>emptyList(), Collections.<ArrowBlock>emptyList());
      ArrowFooter newFooter = roundTrip(footer);
      assertEquals(footer, newFooter);
  
      List<ArrowBlock> ids = new ArrayList<>();
      ids.add(new ArrowBlock(0, 1, 2));
      ids.add(new ArrowBlock(4, 5, 6));
      footer = new ArrowFooter(schema, ids, ids);
      assertEquals(footer, roundTrip(footer));
    }
  
    private ArrowFooter roundTrip(ArrowFooter footer) {
      FlatBufferBuilder builder = new FlatBufferBuilder();
      int i = footer.writeTo(builder);
      builder.finish(i);
      ByteBuffer dataBuffer = builder.dataBuffer();
      ArrowFooter newFooter = new ArrowFooter(Footer.getRootAsFooter(dataBuffer));
      return newFooter;
    }
  }
  