Pair.java

/*-
 * ========================LICENSE_START=================================
 * flyway-core
 * ========================================================================
 * Copyright (C) 2010 - 2025 Red Gate Software Ltd
 * ========================================================================
 * 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.
 * =========================LICENSE_END==================================
 */
package org.flywaydb.core.internal.util;

import lombok.RequiredArgsConstructor;
import lombok.Getter;

import java.util.Arrays;

@RequiredArgsConstructor(staticName = "of")
@Getter
public class Pair<L, R> implements Comparable<Pair<L, R>> {
    private final L left;
    private final R right;

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        Pair<?, ?> pair = (Pair<?, ?>) o;
        return left.equals(pair.left) && right.equals(pair.right);
    }

    @Override
    public int hashCode() {
        return Arrays.hashCode(new Object[] {left, right});
    }

    @SuppressWarnings("unchecked")
    @Override
    public int compareTo(Pair<L, R> o) {
        if (left instanceof Comparable<?>) {
            int l = ((Comparable<L>) left).compareTo(o.left);
            if (l != 0) {
                return l;
            }
        }
        if (right instanceof Comparable<?>) {
            int r = ((Comparable<R>) right).compareTo(o.right);
            if (r != 0) {
                return r;
            }
        }
        return 0;
    }

    @Override
    public String toString() {
        return "Pair{" + "left=" + left + ", right=" + right + '}';
    }
}