brickhouse.udf.sanity.AssertLessThanUDF Maven / Gradle / Ivy

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Extensions of Hive for the Data Developer

There is a newer version: 0.6.0

package brickhouse.udf.sanity;
/**
 * Copyright 2012 Klout, Inc
 *
 * Licensed 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.
 *
 **/

import org.apache.hadoop.hive.ql.exec.UDF;
import org.apache.log4j.Logger;

public class AssertLessThanUDF extends UDF {
	private static final Logger LOG = Logger.getLogger(AssertLessThanUDF.class);

	
	public String evaluate( Double smaller, Double bigger) {
		if( smaller == null || bigger == null ) {
			LOG.error(" Null values found :: " + smaller + " < " + bigger);
			System.err.println(" Null values found :: " + smaller + " < " + bigger);
			throw new RuntimeException(" Null values found :: " + smaller + " < " + bigger);
		}
		if( !( smaller < bigger ) ) {
			LOG.error(" Assertion Not Met :: ! ( " + smaller + " < " + bigger + " ) ");
			System.err.println(" Assertion Not Met :: ! ( " + smaller + " < " + bigger + " ) ");
			throw new RuntimeException(" Assertion Not Met :: ! ( " + smaller + " < " + bigger + " ) ");
		} else {
			return smaller.toString() + " < " + bigger.toString();
		}
	}
}