UDFBaseNumericOp.java

/**
 * 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;

/**
 * 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()));
  }

  public abstract Byte evaluate(Byte a, Byte b);  
  public abstract Integer evaluate(Integer a, Integer b);  
  public abstract Long evaluate(Long a, Long b);  
  public abstract Float evaluate(Float a, Float b);  
  public abstract Double evaluate(Double a, Double b);  

}