/**
* 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 storm.trident.operation.builtin;
import storm.trident.state.ITupleCollection;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import storm.trident.operation.TridentCollector;
import storm.trident.state.BaseQueryFunction;
import storm.trident.state.State;
import storm.trident.tuple.TridentTuple;
public class TupleCollectionGet extends BaseQueryFunction<State, Iterator<List<Object>>> {
@Override
public List<Iterator<List<Object>>> batchRetrieve(State state, List<TridentTuple> args) {
List<Iterator<List<Object>>> ret = new ArrayList<>(args.size());
for (TridentTuple arg : args) {
ret.add(((ITupleCollection) state).getTuples());
}
return ret;
}
@Override
public void execute(TridentTuple tuple, Iterator<List<Object>> tuplesIterator, TridentCollector collector) {
while (tuplesIterator.hasNext()) {
collector.emit(tuplesIterator.next());
}
}
}