/**
* ***************************************************************************
* Copyright (c) 2010 Qcadoo Limited
* Project: Qcadoo Framework
* Version: 1.4
*
* This file is part of Qcadoo.
*
* Qcadoo is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published
* by the Free Software Foundation; either version 3 of the License,
* or (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
* ***************************************************************************
*/
package com.qcadoo.report.api;
/**
* Represents pair key->value
*
* @param <A>
* class of key
* @param <B>
* class of value
*/
public final class Pair<A, B> {
private A key;
private B value;
public Pair(final A key, final B value) {
this.key = key;
this.value = value;
}
public A getKey() {
return key;
}
public B getValue() {
return value;
}
/**
* creates new Pair instance
*
* @param key
* @param value
* @return new Pair containing key and value same as arguments
*/
public static <A, B> Pair<A, B> of(final A key, final B value) {
return new Pair<A, B>(key, value);
}
@Override
@SuppressWarnings("rawtypes")
public boolean equals(final Object obj) {
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final Pair other = (Pair) obj;
if (this.key != other.key && (this.key == null || !this.key.equals(other.key))) {
return false;
}
if (this.value != other.value && (this.value == null || !this.value.equals(other.value))) {
return false;
}
return true;
}
@Override
public int hashCode() {
int hash = 37 * 7;
if (this.key != null) {
hash += this.key.hashCode();
}
hash = 37 * hash;
if (this.value != null) {
hash += this.value.hashCode();
}
return hash;
}
@Override
public String toString() {
return String.format("Pair[%s,%s]", key, value);
}
public void setKey(final A key) {
this.key = key;
}
public void setValue(final B value) {
this.value = value;
}
}