/***********************************************************************************************************************
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* Licensed 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 eu.stratosphere.api.common.functions;
import eu.stratosphere.api.common.aggregators.Aggregator;
import eu.stratosphere.types.Value;
/**
*
*/
public interface IterationRuntimeContext extends RuntimeContext {
/**
* Gets the number of the current superstep. Superstep numbers start at <i>1</i>.
*
* @return The number of the current superstep.
*/
int getSuperstepNumber();
<T extends Aggregator<?>> T getIterationAggregator(String name);
<T extends Value> T getPreviousIterationAggregate(String name);
}