org.jeecqrs.common.AbstractIdentifiable Maven / Gradle / Ivy
/*
* Copyright (c) 2013 Red Rainbow IT Solutions GmbH, Germany
*
* 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 org.jeecqrs.common;
/**
* A layer supertype for Identifiable objects.
*/
public abstract class AbstractIdentifiable implements Identifiable, CompareById {
@Override
public final boolean sameIdentityAs(T other) {
if (other == null || !this.getClass().equals(other.getClass()))
return false;
AbstractIdentifiable o = (AbstractIdentifiable) other;
return this.id().equals(o.id());
}
@Override
public final boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null || getClass() != obj.getClass())
return false;
final T other = (T) obj;
return sameIdentityAs(other);
}
@Override
public final int hashCode() {
if (this.id() == null)
throw new IllegalStateException("Cannot call hashCode() when id() returns null");
return this.id().hashCode();
}
}