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/**
* 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.exec.vector;
import org.apache.hadoop.hive.ql.exec.vector.VectorColumnOrderedMap.Mapping;
/**
* This class collects column information for copying a row from one VectorizedRowBatch to
* same/another batch.
*
* In this variation, column information is ordered by the source column number.
*/
public class VectorColumnSourceMapping extends VectorColumnMapping {
private static final long serialVersionUID = 1L;
public VectorColumnSourceMapping(String name) {
super(name);
}
@Override
public void add(int sourceColumn, int outputColumn, String typeName) {
// Order on sourceColumn.
vectorColumnMapping.add(sourceColumn, outputColumn, typeName);
}
@Override
public void finalize() {
Mapping mapping = vectorColumnMapping.getMapping();
// Ordered columns are the source columns.
sourceColumns = mapping.getOrderedColumns();
outputColumns = mapping.getValueColumns();
typeNames = mapping.getTypeNames();
// Not needed anymore.
vectorColumnMapping = null;
}
public boolean isSourceSequenceGood() {
int count = sourceColumns.length;
for (int i = 0; i < count; i++) {
if (sourceColumns[i] != i) {
return false;
}
}
return true;
}
}