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.record.accessor;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import org.apache.arrow.vector.complex.MapVector;
  import org.apache.arrow.vector.complex.StructVector;
  
  import com.aliyun.odps.table.arrow.accessor.ArrowMapAccessor;
  import com.aliyun.odps.table.arrow.accessor.ArrowVectorAccessor;
  import com.aliyun.odps.type.MapTypeInfo;
  import com.aliyun.odps.type.TypeInfo;
  
  public class ArrowMapAccessorImpl {
  
      public static class ArrowMapAccessorForRecord extends ArrowMapAccessor<Map<Object, Object>> {
          private final boolean isExtension;
          private final TypeInfo keyTypeInfo;
          private final TypeInfo valueTypeInfo;
          private final ArrowVectorAccessor keyAccessor;
          private final ArrowVectorAccessor valueAccessor;
  
          public ArrowMapAccessorForRecord(MapVector mapVector, TypeInfo typeInfo, boolean isExtension) {
              super(mapVector);
              this.isExtension = isExtension;
              this.keyTypeInfo = ((MapTypeInfo) typeInfo).getKeyTypeInfo();
              this.valueTypeInfo = ((MapTypeInfo) typeInfo).getValueTypeInfo();
              StructVector entries = (StructVector) mapVector.getDataVector();
              this.keyAccessor = ArrowToRecordConverter.createColumnVectorAccessor(
                      entries.getChild(MapVector.KEY_NAME), keyTypeInfo, isExtension);
              this.valueAccessor = ArrowToRecordConverter.createColumnVectorAccessor(
                      entries.getChild(MapVector.VALUE_NAME), valueTypeInfo, isExtension);
          }
  
          @Override
          protected Map<Object, Object> getMapData(int offset, int numElements) {
              Map<Object, Object> map = new HashMap<>();
              try {
                  for (int i = 0; i < numElements; i++) {
                      map.put(ArrowToRecordConverter.getData(keyAccessor, keyTypeInfo, offset + i, isExtension),
                              ArrowToRecordConverter.getData(valueAccessor, valueTypeInfo, offset + i, isExtension));
                  }
                  return map;
              } catch (Exception e) {
                  throw new RuntimeException("Could not get the map", e);
              }
          }
      }
  }
  