tajo-storage/tajo-storage-hdfs/src/main/java/org/apache/tajo/storage/orc/objectinspector/ObjectInspectorFactory.java

/**
 * 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.tajo.storage.orc.objectinspector;

import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.StructObjectInspector;
import org.apache.tajo.catalog.Schema;
import org.apache.tajo.common.TajoDataTypes;
import org.apache.tajo.exception.UnsupportedException;

public class ObjectInspectorFactory {

  public static StructObjectInspector buildStructObjectInspector(Schema schema) {
    StructObjectInspector structOI = new TajoStructObjectInspector(schema);
    return structOI;
  }

  public static ObjectInspector buildObjectInspectorByType(TajoDataTypes.Type dataType) throws UnsupportedException {
    ObjectInspector oi = null;

    switch(dataType) {
      case BOOLEAN:
        oi = new TajoBooleanObjectInspector();
        break;

      case INT2:
        oi = new TajoShortObjectInspector();
        break;

      case INET4:
      case INT4:
        oi = new TajoIntObjectInspector();
        break;

      case INT8:
        oi = new TajoLongObjectInspector();
        break;

      case FLOAT4:
        oi = new TajoFloatObjectInspector();
        break;

      case FLOAT8:
        oi = new TajoDoubleObjectInspector();
        break;

      case TEXT:
      case CHAR:
        oi = new TajoStringObjectInspector();
        break;

      case TIMESTAMP:
        oi = new TajoTimestampObjectInspector();
        break;

      case DATE:
        oi = new TajoDateObjectInspector();
        break;

      case BLOB:
      case PROTOBUF:
        oi = new TajoBlobObjectInspector();
        break;

      case NULL_TYPE:
        oi = new TajoNullObjectInspector();
        break;

      default:
        throw new UnsupportedException(dataType.name()+" is not supported yet in OrcAppender");
    }

    return oi;
  }
}