hive/execution/UDFListListInt.java

0001 /*
0002  * Licensed to the Apache Software Foundation (ASF) under one or more
0003  * contributor license agreements.  See the NOTICE file distributed with
0004  * this work for additional information regarding copyright ownership.
0005  * The ASF licenses this file to You under the Apache License, Version 2.0
0006  * (the "License"); you may not use this file except in compliance with
0007  * the License.  You may obtain a copy of the License at
0008  *
0009  *    http://www.apache.org/licenses/LICENSE-2.0
0010  *
0011  * Unless required by applicable law or agreed to in writing, software
0012  * distributed under the License is distributed on an "AS IS" BASIS,
0013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
0014  * See the License for the specific language governing permissions and
0015  * limitations under the License.
0016  */
0017
0018 package org.apache.spark.sql.hive.execution;
0019
0020 import org.apache.hadoop.hive.ql.exec.UDF;
0021
0022 import java.util.List;
0023
0024 public class UDFListListInt extends UDF {
0025   /**
0026    * @param obj
0027    *   SQL schema: array&lt;struct&lt;x: int, y: int, z: int&gt;&gt;
0028    *   Java Type: List&lt;List&lt;Integer&gt;&gt;
0029    */
0030   @SuppressWarnings("unchecked")
0031   public long evaluate(Object obj) {
0032     if (obj == null) {
0033       return 0L;
0034     }
0035     List<List<?>> listList = (List<List<?>>) obj;
0036     long retVal = 0;
0037     for (List<?> aList : listList) {
0038       Number someInt = (Number) aList.get(1);
0039       try {
0040         retVal += someInt.longValue();
0041       } catch (NullPointerException e) {
0042         System.out.println(e);
0043       }
0044     }
0045     return retVal;
0046   }
0047 }