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A general and simple library for Android
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/*
 * Copyright (C) 2018 HaiYang Li
 *
 * 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 com.landawn.abacus.util;

import com.landawn.abacus.util.u.Optional;
import com.landawn.abacus.util.stream.LongStream;

/**
 * 
 * @since 1.2
 * 
 * @author Haiyang Li
 */
public final class LongPair {
    public final long _1;
    public final long _2;

    LongPair() {
        this(0, 0);
    }

    LongPair(long _1, long _2) {
        this._1 = _1;
        this._2 = _2;
    }

    public static LongPair of(long _1, long _2) {
        return new LongPair(_1, _2);
    }

    public long min() {
        return N.min(_1, _2);
    }

    public long max() {
        return N.max(_1, _2);
    }

    public long sum() {
        return _1 + _2;
    }

    public double average() {
        return (0d + _1 + _2) / 2;
    }

    public LongPair reversed() {
        return new LongPair(_2, _1);
    }

    public long[] toArray() {
        return new long[] { _1, _2 };
    }

    public LongList toList() {
        return LongList.of(_1, _2);
    }

    public  void forEach(Try.LongConsumer comsumer) throws E {
        comsumer.accept(this._1);
        comsumer.accept(this._2);
    }

    public  void accept(Try.Consumer action) throws E {
        action.accept(this);
    }

    public  U map(Try.Function mapper) throws E {
        return mapper.apply(this);
    }

    public  Optional filter(final Try.Predicate predicate) throws E {
        return predicate.test(this) ? Optional.of(this) : Optional. empty();
    }

    public LongStream stream() {
        return LongStream.of(_1, _2);
    }

    @Override
    public int hashCode() {
        return (int) (31 * _1 + this._2);
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        } else if (!(obj instanceof LongPair)) {
            return false;
        } else {
            LongPair other = (LongPair) obj;
            return this._1 == other._1 && this._2 == other._2;
        }
    }

    @Override
    public String toString() {
        return "[" + this._1 + ", " + this._2 + "]";
    }
}