| /* |
| * 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.datasketches.pig.tuple; |
| |
| import java.util.List; |
| |
| import org.apache.pig.data.BagFactory; |
| import org.apache.pig.data.DataBag; |
| import org.apache.pig.data.Tuple; |
| import org.apache.pig.data.TupleFactory; |
| |
| @SuppressWarnings("javadoc") |
| public class PigUtil { |
| /** |
| * Wraps input Objects in a Tuple |
| * @param objects Objects intended to be wrapped |
| * @return a Pig Tuple containing the input Objects |
| */ |
| public static Tuple objectsToTuple(final Object ... objects) { |
| final Tuple tuple = TupleFactory.getInstance().newTuple(); |
| for (final Object object: objects) { tuple.append(object); } |
| return tuple; |
| } |
| |
| /** |
| * Wraps a set of Tuples in a DataBag |
| * @param tuples Tuples to wrap |
| * @return a Pig DataBag containing the input Tuples |
| */ |
| public static DataBag tuplesToBag(final Tuple ... tuples) { |
| final DataBag bag = BagFactory.getInstance().newDefaultBag(); |
| for (final Tuple tuple: tuples) { bag.add(tuple); } |
| return bag; |
| } |
| |
| /** |
| * Wraps a List of objects into a DataBag of Tuples (one object per Tuple) |
| * @param list List of items to wrap |
| * @param <T> Type of objects in the List |
| * @return a Pig DataBag containing Tuples populated with list items |
| */ |
| public static <T> DataBag listToBagOfTuples(final List<T> list) { |
| final DataBag bag = BagFactory.getInstance().newDefaultBag(); |
| for (final Object object: list) { |
| final Tuple tuple = TupleFactory.getInstance().newTuple(); |
| tuple.append(object); |
| bag.add(tuple); |
| } |
| return bag; |
| } |
| } |