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 com.aliyun.odps.table.arrow.constructor;
  
  import com.aliyun.odps.table.utils.Preconditions;
  import org.apache.arrow.vector.complex.StructVector;
  
  /**
   * {@link ArrowFieldWriter} for Struct.
   */
  public abstract class ArrowStructWriter<IN, TYPE_STRUCT> extends ArrowFieldWriter<IN> {
  
      protected ArrowFieldWriter<TYPE_STRUCT>[] fieldsWriters;
  
      public ArrowStructWriter(StructVector valueVector,
                               ArrowFieldWriter<TYPE_STRUCT>[] fieldsWriters) {
          super(valueVector);
          this.fieldsWriters = Preconditions.checkNotNull(fieldsWriters, "Struct field writer");
      }
  
      protected abstract TYPE_STRUCT readStruct(IN in, int ordinal);
  
      @Override
      protected void setValue(IN in, int ordinal) {
          TYPE_STRUCT struct = readStruct(in, ordinal);
          int i = 0;
          ((StructVector) valueVector).setIndexDefined(count);
          while (i < fieldsWriters.length) {
              fieldsWriters[i].write(struct, i);
              i += 1;
          }
      }
  
      @Override
      protected void setNull() {
          int i = 0;
          while (i < fieldsWriters.length) {
              fieldsWriters[i].setNull();
              fieldsWriters[i].count += 1;
              i += 1;
          }
          ((StructVector) valueVector).setNull(count);
      }
  
      @Override
      public void finish() {
          super.finish();
          for (ArrowFieldWriter<?> fieldsWriter : fieldsWriters) {
              fieldsWriter.finish();
          }
      }
  
      @Override
      public void reset() {
          super.reset();
          for (ArrowFieldWriter<?> fieldsWriter : fieldsWriters) {
              fieldsWriter.reset();
          }
      }
  }