| /* |
| * 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.hadoop.hive.ql.io.parquet.serde; |
| |
| import java.util.Map; |
| |
| import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector; |
| import org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspector; |
| import org.apache.hadoop.io.ArrayWritable; |
| import org.apache.hadoop.io.Writable; |
| |
| /** |
| * The DeepParquetHiveMapInspector will inspect an ArrayWritable, considering it as a Hive map. |
| * <p> |
| * It can also inspect a Map if Hive decides to inspect the result of an inspection. |
| * <p> |
| * When trying to access elements from the map it will iterate over all keys, inspecting them and comparing them to the |
| * desired key. |
| */ |
| public class DeepParquetHiveMapInspector extends AbstractParquetMapInspector { |
| |
| public DeepParquetHiveMapInspector(final ObjectInspector keyInspector, final ObjectInspector valueInspector) { |
| super(keyInspector, valueInspector); |
| } |
| |
| @Override |
| public Object getMapValueElement(final Object data, final Object key) { |
| if (data == null || key == null) { |
| return null; |
| } |
| |
| if (data instanceof ArrayWritable) { |
| final Writable[] mapContainer = ((ArrayWritable) data).get(); |
| |
| if (mapContainer == null || mapContainer.length == 0) { |
| return null; |
| } |
| |
| final Writable[] mapArray = ((ArrayWritable) mapContainer[0]).get(); |
| |
| for (final Writable obj : mapArray) { |
| final ArrayWritable mapObj = (ArrayWritable) obj; |
| final Writable[] arr = mapObj.get(); |
| if (key.equals(arr[0]) || key.equals(((PrimitiveObjectInspector) keyInspector).getPrimitiveJavaObject(arr[0])) |
| || key.equals(((PrimitiveObjectInspector) keyInspector).getPrimitiveWritableObject(arr[0]))) { |
| return arr[1]; |
| } |
| } |
| |
| return null; |
| } |
| |
| if (data instanceof Map) { |
| final Map<?, ?> map = (Map<?, ?>) data; |
| |
| if (map.containsKey(key)) { |
| return map.get(key); |
| } |
| |
| for (final Map.Entry<?, ?> entry : map.entrySet()) { |
| if (key.equals(((PrimitiveObjectInspector) keyInspector).getPrimitiveJavaObject(entry.getKey())) |
| || key.equals(((PrimitiveObjectInspector) keyInspector).getPrimitiveWritableObject(entry.getKey()))) { |
| return entry.getValue(); |
| } |
| } |
| |
| return null; |
| } |
| |
| throw new UnsupportedOperationException("Cannot inspect " + data.getClass().getCanonicalName()); |
| } |
| } |