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/*
* The MIT License (MIT)
*
* Copyright (c) 2016 btrekkie
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.interval;
/**
* Wraps a value using reference equality. In other words, two references are equal only if their values are the same
* object instance, as in ==.
* @param <T> The type of value.
*/
class Reference<T> {
/** The value this wraps. */
private final T value;
public Reference(T value) {
this.value = value;
}
public boolean equals(Object obj) {
if (!(obj instanceof Reference)) {
return false;
}
Reference<?> reference = (Reference<?>)obj;
return value == reference.value;
}
@Override
public int hashCode() {
return System.identityHashCode(value);
}
}
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