/**
* 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.udf;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hive.ql.exec.Description;
import org.apache.hadoop.hive.ql.exec.UDF;
import org.apache.hadoop.hive.serde2.io.DoubleWritable;
@Description(
name = "UDFDegrees",
value = "_FUNC_(x) - Converts radians to degrees",
extended = "Example:\n" +
" > SELECT _FUNC_(30) FROM src LIMIT 1;\n" +
" -1\n"
)
public class UDFDegrees extends UDF{
@SuppressWarnings("unused")
private static Log LOG = LogFactory.getLog(UDFDegrees.class.getName());
DoubleWritable result = new DoubleWritable();
public UDFDegrees() {
}
public DoubleWritable evaluate(DoubleWritable i) {
if (i == null) {
return null;
} else {
result.set(Math.toDegrees(i.get()));
return result;
}
}
}