| /* |
| * 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.drill.exec.store.hive.writers.complex; |
| |
| import org.apache.drill.exec.store.hive.writers.HiveValueWriter; |
| import org.apache.hadoop.hive.serde2.objectinspector.UnionObjectInspector; |
| |
| public class HiveUnionWriter implements HiveValueWriter { |
| |
| private final HiveValueWriter[] unionFieldWriters; |
| |
| private final UnionObjectInspector unionObjectInspector; |
| |
| public HiveUnionWriter(HiveValueWriter[] unionFieldWriters, UnionObjectInspector unionObjectInspector) { |
| this.unionFieldWriters = unionFieldWriters; |
| this.unionObjectInspector = unionObjectInspector; |
| } |
| |
| @Override |
| public void write(Object value) { |
| int tag = unionObjectInspector.getTag(value); |
| Object field = unionObjectInspector.getField(value); |
| if (field == null) { |
| throw new UnsupportedOperationException("Null value is not supported in Hive union."); |
| } else { |
| unionFieldWriters[tag].write(field); |
| } |
| } |
| } |