org.apache.hadoop.hive.ql.exec.vector.VectorColumnMapping Maven / Gradle / Ivy
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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 java.util.Arrays;
/**
* This class collects column information for copying a row from one VectorizedRowBatch to
* same/another batch.
*/
public abstract class VectorColumnMapping {
private static final long serialVersionUID = 1L;
protected int[] sourceColumns;
protected int[] outputColumns;
protected String[] typeNames;
protected VectorColumnOrderedMap vectorColumnMapping;
public VectorColumnMapping(String name) {
this.vectorColumnMapping = new VectorColumnOrderedMap(name);
}
public abstract void add(int sourceColumn, int outputColumn, String typeName);
public abstract void finalize();
public int getCount() {
return sourceColumns.length;
}
public int[] getInputColumns() {
return sourceColumns;
}
public int[] getOutputColumns() {
return outputColumns;
}
public String[] getTypeNames() {
return typeNames;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("source columns: " + Arrays.toString(sourceColumns));
sb.append(", ");
sb.append("output columns: " + Arrays.toString(outputColumns));
sb.append(", ");
sb.append("type names: " + Arrays.toString(typeNames));
return sb.toString();
}
}