services/billing-aws/src/main/java/com/epam/dlab/core/aggregate/UsageDataList.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 com.epam.dlab.core.aggregate;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

/** List of usage dates the billing report data.
 */
public class UsageDataList implements Iterable<String> {
	/** List of dates. */
	private final Map<String, Boolean> map = new HashMap<>();
	
	/** Appends the date to the list and returns it.
	 * @param usageDate the date of data.
	 * @return Instance of the range.
	 */
	public void append(String usageDate) {
	    synchronized (this) {
	    	if (!map.containsKey(usageDate)) {
	    		map.put(usageDate, false);
	    	}
	    }
	}

	/** Returns the number of the range in list. */
	public int size() {
		return map.size();
	}

	/** Returns the value for date.
	 * @param usageDate the date.
	 */
	public Boolean get(String usageDate) {
		return map.get(usageDate);
	}

	/** Set the value of usageDate.
	 * @param usageDate the date.
	 */
	public void set(String usageDate, boolean value) {
		if (map.containsKey(usageDate)) {
    		map.put(usageDate, value);
    	}
	}

	/** Removes all of the elements from list.
	 */
	public void clear() {
		map.clear();
	}

	@Override
	public Iterator<String> iterator() {
		return map.keySet().iterator();
	}
}