| /** |
| * 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.lens.storage.db; |
| |
| |
| import static org.apache.hadoop.hive.serde.serdeConstants.LIST_COLUMNS; |
| import static org.apache.hadoop.hive.serde.serdeConstants.LIST_COLUMN_TYPES; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.Properties; |
| |
| import org.apache.commons.lang.NotImplementedException; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hive.serde2.AbstractSerDe; |
| import org.apache.hadoop.hive.serde2.SerDeException; |
| import org.apache.hadoop.hive.serde2.SerDeStats; |
| import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector; |
| import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory; |
| import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo; |
| import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoUtils; |
| import org.apache.hadoop.io.Writable; |
| |
| /** |
| * The Class DBSerde. |
| */ |
| public class DBSerde extends AbstractSerDe { |
| |
| /** |
| * The cached object inspector. |
| */ |
| private ObjectInspector cachedObjectInspector; |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.apache.hadoop.hive.serde2.AbstractSerDe#deserialize(org.apache.hadoop.io.Writable) |
| */ |
| @Override |
| public Object deserialize(Writable arg0) throws SerDeException { |
| throw new NotImplementedException(); |
| } |
| |
| @Override |
| public ObjectInspector getObjectInspector() throws SerDeException { |
| return cachedObjectInspector; |
| } |
| |
| @Override |
| public SerDeStats getSerDeStats() { |
| return null; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.apache.hadoop.hive.serde2.AbstractSerDe#initialize(org.apache.hadoop.conf.Configuration, |
| * java.util.Properties) |
| */ |
| @Override |
| public void initialize(Configuration conf, Properties tbl) throws SerDeException { |
| String columnNameProperty = tbl.getProperty(LIST_COLUMNS); |
| String columnTypeProperty = tbl.getProperty(LIST_COLUMN_TYPES); |
| List<String> columnNames = Arrays.asList(columnNameProperty.split(",")); |
| List<TypeInfo> columnTypes = TypeInfoUtils.getTypeInfosFromTypeString(columnTypeProperty); |
| |
| List<ObjectInspector> columnObjectInspectors = new ArrayList<ObjectInspector>(columnNames.size()); |
| ObjectInspector colObjectInspector; |
| for (int col = 0; col < columnNames.size(); col++) { |
| colObjectInspector = TypeInfoUtils.getStandardJavaObjectInspectorFromTypeInfo(columnTypes.get(col)); |
| columnObjectInspectors.add(colObjectInspector); |
| } |
| |
| cachedObjectInspector = ObjectInspectorFactory |
| .getColumnarStructObjectInspector(columnNames, columnObjectInspectors); |
| } |
| |
| @Override |
| public Class<? extends Writable> getSerializedClass() { |
| return null; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.apache.hadoop.hive.serde2.AbstractSerDe#serialize(java.lang.Object, |
| * org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector) |
| */ |
| @Override |
| public Writable serialize(Object arg0, ObjectInspector arg1) throws SerDeException { |
| throw new NotImplementedException(); |
| } |
| |
| } |