/*
 * 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.flink.streaming.runtime.operators.windowing;

import java.util.ArrayList;
import org.apache.flink.annotation.Internal;
import org.apache.flink.api.common.functions.Function;
import org.apache.flink.api.common.typeutils.TypeSerializer;
import org.apache.flink.api.java.functions.KeySelector;
import org.apache.flink.runtime.state.ArrayListSerializer;
import org.apache.flink.streaming.api.windowing.windows.TimeWindow;
import org.apache.flink.streaming.api.windowing.windows.Window;
import org.apache.flink.streaming.runtime.operators.windowing.functions.InternalWindowFunction;

/**
 * Special window operator implementation for windows that fire at the same time for all keys with
 * accumulating windows.
 *
 * @deprecated Deprecated in favour of the generic {@link WindowOperator}. This was an
 * optimized implementation used for aligned windows.
 */
@Internal
@Deprecated
public class AccumulatingProcessingTimeWindowOperator<KEY, IN, OUT>
		extends AbstractAlignedProcessingTimeWindowOperator<KEY, IN, OUT, ArrayList<IN>, InternalWindowFunction<Iterable<IN>, OUT, KEY, TimeWindow>> {

	private static final long serialVersionUID = 7305948082830843475L;


	public AccumulatingProcessingTimeWindowOperator(
			InternalWindowFunction<Iterable<IN>, OUT, KEY, TimeWindow> function,
			KeySelector<IN, KEY> keySelector,
			TypeSerializer<KEY> keySerializer,
			TypeSerializer<IN> valueSerializer,
			long windowLength,
			long windowSlide) {
		super(function, keySelector, keySerializer,
				new ArrayListSerializer<>(valueSerializer), windowLength, windowSlide);
	}

	@Override
	protected AccumulatingKeyedTimePanes<IN, KEY, OUT> createPanes(KeySelector<IN, KEY> keySelector, Function function) {
		@SuppressWarnings("unchecked")
		InternalWindowFunction<Iterable<IN>, OUT, KEY, Window> windowFunction = (InternalWindowFunction<Iterable<IN>, OUT, KEY, Window>) function;

		return new AccumulatingKeyedTimePanes<>(keySelector, windowFunction);
	}
}