/**
* 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.hadoop.hive.ql.exec.NumericOpMethodResolver;
import org.apache.hadoop.hive.ql.exec.UDF;
import org.apache.hadoop.hive.serde2.io.ByteWritable;
import org.apache.hadoop.hive.serde2.io.DoubleWritable;
import org.apache.hadoop.hive.serde2.io.ShortWritable;
import org.apache.hadoop.io.FloatWritable;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.LongWritable;
/**
* Base class for numeric operators like +, -, / etc. All these operators share
* a common method resolver (NumericOpMethodResolver).
*/
public abstract class UDFBaseNumericOp extends UDF {
/**
* Constructor. This constructor sets the resolver to be used for comparison
* operators. See {@link org.apache.hadoop.hive.ql.exec.UDFMethodResolver}
*/
public UDFBaseNumericOp() {
super(null);
setResolver(new NumericOpMethodResolver(this.getClass()));
}
protected ByteWritable byteWritable = new ByteWritable();
protected ShortWritable shortWritable = new ShortWritable();
protected IntWritable intWritable = new IntWritable();
protected LongWritable longWritable = new LongWritable();
protected FloatWritable floatWritable = new FloatWritable();
protected DoubleWritable doubleWritable = new DoubleWritable();
public abstract ByteWritable evaluate(ByteWritable a, ByteWritable b);
public abstract ShortWritable evaluate(ShortWritable a, ShortWritable b);
public abstract IntWritable evaluate(IntWritable a, IntWritable b);
public abstract LongWritable evaluate(LongWritable a, LongWritable b);
public abstract FloatWritable evaluate(FloatWritable a, FloatWritable b);
public abstract DoubleWritable evaluate(DoubleWritable a, DoubleWritable b);
}