/**
* Copyright 2011-2017 Asakusa Framework Team.
*
* 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.asakusafw.utils.collections;
/**
* Represents a tuple with 2 elements.
* @param <T1> type of first element
* @param <T2> type of second element
*/
public class Tuple2<T1, T2> {
/**
* The first element.
*/
public final T1 first;
/**
* The second element.
*/
public final T2 second;
/**
* Creates a new instance.
* @param first the first element
* @param second the second element
*/
public Tuple2(T1 first, T2 second) {
this.first = first;
this.second = second;
}
/**
* Creates a new instance.
* @param <T1> type of first element
* @param <T2> type of second element
* @param first the first element
* @param second the second element
* @return the created instance.
*/
public static <T1, T2> Tuple2<T1, T2> of(T1 first, T2 second) {
return new Tuple2<>(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;
}
Tuple2<?, ?> other = (Tuple2<?, ?>) obj;
if (first == null) {
if (other.first != null) {
return false;
}
} else if (first.equals(other.first) == false) {
return false;
}
if (second == null) {
if (other.second != null) {
return false;
}
} else if (second.equals(other.second) == false) {
return false;
}
return true;
}
@Override
public String toString() {
return String.format("(%s, %s)", first, second); //$NON-NLS-1$
}
}