/*
 * Copyright (C) 2015 SoftIndex LLC.
 *
 * 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 io.datakernel.aggregation;

import com.google.common.base.MoreObjects;

import java.util.List;

import static java.util.Arrays.asList;

/**
 * Let's first define a class that will hold our key-value pair.
 * This class also contains 'timestamp' field, so that AggregationDB will return the latest entry for the particular key.
 */
public class KeyValuePair {
	public int key;
	public int value;
	public long timestamp;

	public KeyValuePair() {
	}

	public KeyValuePair(int key, int value, long timestamp) {
		this.key = key;
		this.value = value;
		this.timestamp = timestamp;
	}

	@Override
	public boolean equals(Object o) {
		if (this == o) return true;
		if (o == null || getClass() != o.getClass()) return false;

		KeyValuePair that = (KeyValuePair) o;

		if (key != that.key) return false;
		if (value != that.value) return false;
		return timestamp == that.timestamp;

	}

	@Override
	public int hashCode() {
		int result = key;
		result = 31 * result + value;
		result = 31 * result + (int) (timestamp ^ (timestamp >>> 32));
		return result;
	}

	public static final List<String> KEYS = asList("key");

	public static final List<String> FIELDS = asList("value", "timestamp");

	@Override
	public String toString() {
		return MoreObjects.toStringHelper(this)
				.add("key", key)
				.add("value", value)
				.add("timestamp", timestamp)
				.toString();
	}
}