/**
* 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.expressions;
import org.apache.hadoop.hive.ql.exec.vector.BytesColumnVector;
public class CastBooleanToStringViaLongToString extends LongToStringUnaryUDF {
private static final long serialVersionUID = 1L;
private static final byte[][] dictionary = { {'F', 'A', 'L', 'S', 'E'}, {'T', 'R', 'U', 'E'} };
public CastBooleanToStringViaLongToString(int inputColumn, int outputColumn) {
super(inputColumn, outputColumn);
}
public CastBooleanToStringViaLongToString() {
super();
}
protected void assign(BytesColumnVector outV, int i, byte[] bytes, int length) {
outV.setVal(i, bytes, 0, length);
}
@Override
protected void func(BytesColumnVector outV, long[] vector, int i) {
/* 0 is false and 1 is true in the input vector, so a simple dictionary is used
* with two entries. 0 references FALSE and 1 references TRUE in the dictionary.
*/
assign(outV, i, dictionary[(int) vector[i]], dictionary[(int) vector[i]].length);
}
}