Pair.java

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/*******************************************************************************
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use these files 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.
 *
 * Copyright 2014 - Juan Pino, Aurelien Waite, William Byrne
 *******************************************************************************/
package uk.ac.cam.eng.util;

public class Pair<T, U> {

        private T first;
        private U second;

        public Pair() {
        }

        public Pair(T first, U second) {
                this.first = first;
                this.second = second;
        }

        public static <F, S> Pair<F, S> createPair(F first, S second) {
                return new Pair<F, S>(first, second);
        }

        public T getFirst() {
                return first;
        }

        public void setFirst(T first) {
                this.first = first;
        }

        public U getSecond() {
                return second;
        }

        public void setSecond(U second) {
                this.second = second;
        }

        @Override
        public String toString() {
                return first + "\t" + 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<T, U> other = (Pair<T, U>) 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;
        }
}