/**
* 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 hive.it.custom.udfs.vector;
import org.apache.hadoop.hive.ql.exec.vector.BytesColumnVector;
import org.apache.hadoop.hive.ql.exec.vector.VectorExpressionDescriptor.Descriptor;
import org.apache.hadoop.hive.ql.exec.vector.ColumnVector;
import org.apache.hadoop.hive.ql.exec.vector.LongColumnVector;
import org.apache.hadoop.hive.ql.exec.vector.VectorExpressionDescriptor;
import org.apache.hadoop.hive.ql.exec.vector.VectorizedRowBatch;
import org.apache.hadoop.hive.ql.exec.vector.expressions.StringUnaryUDF;
import org.apache.hadoop.hive.ql.exec.vector.expressions.StringUnaryUDFDirect;
import org.apache.hadoop.hive.ql.exec.vector.expressions.VectorExpression;
import org.apache.orc.impl.TreeReaderFactory.BytesColumnVectorUtil;
public class VectorStringRot13 extends StringUnaryUDFDirect {
public VectorStringRot13(int inputColumn, int outputColumn) {
super(inputColumn, outputColumn);
}
public VectorStringRot13() {
super();
}
@Override
protected void func(BytesColumnVector outV, byte[][] vector, int[] start,
int[] length, int i) {
int off = start[i];
int len = length[i];
byte[] src = vector[i];
byte[] dst = new byte[len];
for (int j = 0; j < len ; j++) {
dst[j] = rot13(src[off+j]);
}
outV.setVal(i, dst, 0, length[i]);
}
private byte rot13(byte b) {
if (b >= 'a' && b <= 'm' || b >= 'A' && b <= 'M' ) {
return (byte) (b+13);
}
if (b >= 'n' && b <= 'z' || b >= 'N' && b <= 'Z') {
return (byte) (b-13);
}
return b;
}
}