aQute.libg.tuple.Pair Maven / Gradle / Ivy
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package aQute.libg.tuple;
import java.io.Serializable;
public class Pair implements Serializable, Cloneable {
private static final long serialVersionUID = 1L;
private final A first;
private final B second;
public Pair(A first, B second) {
assert first != null && second != null : "both parameters must be non-null";
this.first = first;
this.second = second;
}
public static Pair newInstance(A first, B second) {
return new Pair<>(first, second);
}
public A getFirst() {
return first;
}
public B getSecond() {
return second;
}
@Override
public String toString() {
return "Pair [" + first + ", " + second + "]";
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((first == null) ? 0 : first.hashCode());
result = prime * result + ((second == null) ? 0 : second.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
@SuppressWarnings("unchecked")
Pair other = (Pair) obj;
if (first == null) {
if (other.first != null)
return false;
} else if (!first.equals(other.first))
return false;
if (second == null) {
if (other.second != null)
return false;
} else if (!second.equals(other.second))
return false;
return true;
}
@Override
public Pair clone() {
return new Pair<>(first, second);
}
}