/*
 * 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.test.streaming.runtime.util;

import java.util.Collections;
import java.util.Comparator;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.streaming.api.functions.sink.RichSinkFunction;

import java.util.ArrayList;
import java.util.List;
import java.util.TreeSet;

public class TestListResultSink<T> extends RichSinkFunction<T> {

	private static final long serialVersionUID = 1L;
	private int resultListId;

	public TestListResultSink() {
		this.resultListId = TestListWrapper.getInstance().createList();
	}

	@Override
	public void open(Configuration parameters) throws Exception {
		super.open(parameters);
	}

	@Override
	public void invoke(T value) throws Exception {
		synchronized (resultList()) {
			resultList().add(value);
		}
	}

	@Override
	public void close() throws Exception {
		super.close();
	}

	@SuppressWarnings("unchecked")
	private List<T> resultList() {
		synchronized (TestListWrapper.getInstance()) {
			return (List<T>) TestListWrapper.getInstance().getList(resultListId);
		}
	}

	public List<T> getResult() {
		synchronized (resultList()) {
			ArrayList<T> copiedList = new ArrayList<T>(resultList());
			return copiedList;
		}
	}

	public List<T> getSortedResult() {
		synchronized (resultList()) {
			ArrayList<T> sortedList = new ArrayList<T>(resultList());
			Collections.sort((List) sortedList);
			return sortedList;
		}
	}
}