/**
* 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.serde2.objectinspector;
import java.util.List;
import org.apache.hadoop.hive.serde2.BaseStructObjectInspector;
import org.apache.hadoop.hive.serde2.columnar.ColumnarStructBase;
/**
* ColumnarStructObjectInspector works on struct data that is stored in
* ColumnarStructBase.
*
* The names of the struct fields and the internal structure of the struct
* fields are specified in the ctor of the ColumnarStructObjectInspector.
*
* Always use the ObjectInspectorFactory to create new ObjectInspector objects,
* instead of directly creating an instance of this class.
*/
class ColumnarStructObjectInspector extends BaseStructObjectInspector {
protected ColumnarStructObjectInspector() {
super();
}
/**
* Call ObjectInspectorFactory.getLazySimpleStructObjectInspector instead.
*/
public ColumnarStructObjectInspector(List<String> structFieldNames,
List<ObjectInspector> structFieldObjectInspectors) {
super(structFieldNames, structFieldObjectInspectors);
}
public ColumnarStructObjectInspector(List<String> structFieldNames,
List<ObjectInspector> structFieldObjectInspectors,
List<String> structFieldComments) {
super(structFieldNames, structFieldObjectInspectors, structFieldComments);
}
@Override
public Object getStructFieldData(Object data, StructField fieldRef) {
if (data == null) {
return null;
}
ColumnarStructBase struct = (ColumnarStructBase) data;
MyField f = (MyField) fieldRef;
int fieldID = f.getFieldID();
assert (fieldID >= 0 && fieldID < fields.size());
return struct.getField(fieldID);
}
@Override
public List<Object> getStructFieldsDataAsList(Object data) {
if (data == null) {
return null;
}
ColumnarStructBase struct = (ColumnarStructBase) data;
return struct.getFieldsAsList();
}
}