TridentMultiReducerContext.java

/**
 * 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;

import backtype.storm.tuple.Fields;
import java.util.List;
import storm.trident.tuple.TridentTuple;
import storm.trident.tuple.TridentTupleView.ProjectionFactory;

public class TridentMultiReducerContext {
    List<TridentTuple.Factory> _factories;

    public TridentMultiReducerContext(List<TridentTuple.Factory> factories) {
        _factories = factories;
    }

    public ProjectionFactory makeProjectionFactory(int streamIndex, Fields fields) {
        return new ProjectionFactory(_factories.get(streamIndex), fields);
    }
}