/*
* 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.pig.piggybank.evaluation.util;
import java.io.IOException;
import org.apache.pig.EvalFunc;
import org.apache.pig.data.BagFactory;
import org.apache.pig.data.DataBag;
import org.apache.pig.data.Tuple;
import org.apache.pig.data.TupleFactory;
/**
* This class takes a list of items and puts them into a bag
*
* T = foreach U generate ToBag($0, $1, $2);
*
* It's like saying this:
*
* T = foreach U generate {($0), ($1), ($2)}
*
*/
/**
* @deprecated Use {@link org.apache.pig.builtin.TOBAG}
*/
@Deprecated
public class ToBag extends EvalFunc<DataBag> {
@Override
public DataBag exec(Tuple input) throws IOException {
try {
DataBag bag = BagFactory.getInstance().newDefaultBag();
for (int i = 0; i < input.size(); ++i) {
final Object object = input.get(i);
if (object != null) {
Tuple tp2 = TupleFactory.getInstance().newTuple(1);
tp2.set(0, object);
bag.add(tp2);
}
}
return bag;
} catch (Exception ee) {
throw new RuntimeException("Error while creating a bag", ee);
}
}
}