AssertLessThanUDF.java

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();
        }
    }
}