001/*
002 * Copyright (c) 2015-2020, Oracle and/or its affiliates. All rights reserved.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.tribuo.util.infotheory.impl;
018
019/**
020 * A mutable tuple of a double and a long.
021 */
022public final class WeightCountTuple {
023
024    /**
025     * The current weight.
026     */
027    public double weight;
028    /**
029     * The current count.
030     */
031    public long count;
032
033    /**
034     * Creates a zeroed WeightCountTuple.
035     */
036    public WeightCountTuple() {
037        this.weight = 0.0;
038        this.count = 0;
039    }
040
041    /**
042     * Creates a WeightCountTuple with the specifed values.
043     * @param weight The current weight.
044     * @param count The current count.
045     */
046    public WeightCountTuple(double weight, long count) {
047        this.weight = weight;
048        this.count = count;
049    }
050
051    @Override
052    public int hashCode() {
053        int hash = 3;
054        hash = 47 * hash + (int) (Double.doubleToLongBits(this.weight) ^ (Double.doubleToLongBits(this.weight) >>> 32));
055        hash = 47 * hash + (int) (this.count ^ (this.count >>> 32));
056        return hash;
057    }
058
059    @Override
060    public boolean equals(Object obj) {
061        if (obj == null) {
062            return false;
063        }
064        if (!(obj instanceof WeightCountTuple)) {
065            return false;
066        }
067        final WeightCountTuple other = (WeightCountTuple) obj;
068        return (this.weight == other.weight) && (this.count == other.count);
069    }
070    
071}