pl.project13.core.util.Pair Maven / Gradle / Ivy
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/*
* This file is part of git-commit-id-plugin-core by Konrad 'ktoso' Malawski
*
* git-commit-id-plugin-core is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* git-commit-id-plugin-core is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with git-commit-id-plugin-core. If not, see .
*/
package pl.project13.core.util;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.util.Objects;
public class Pair {
@Nonnull
public final A first;
@Nonnull
public final B second;
@SuppressWarnings("ConstantConditions")
public Pair(A first, B second) {
Objects.requireNonNull(first, "The first parameter must not be null.");
Objects.requireNonNull(second, "The second parameter must not be null.");
this.first = first;
this.second = second;
}
@Nonnull
public static Pair of(A first, B second) {
return new Pair<>(first, second);
}
@Override
public boolean equals(@Nullable Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
Pair pair = (Pair) o;
if (!first.equals(pair.first)) {
return false;
}
//noinspection RedundantIfStatement
if (!second.equals(pair.second)) {
return false;
}
return true;
}
@Override
public int hashCode() {
int result = first.hashCode();
result = 31 * result + (second.hashCode());
return result;
}
@Nonnull
@Override
public String toString() {
return String.format("Pair(%s, %s)", first, second);
}
}