Java tutorial
/* * Copyright 2004, 2005, 2006 Acegi Technology Pty Limited * * 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 * * https://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 org.springframework.security.acls.model; import java.io.Serializable; /** * A security identity recognised by the ACL system. * * <p> * This interface provides indirection between actual security objects (eg principals, * roles, groups etc) and what is stored inside an <code>Acl</code>. This is because an * <code>Acl</code> will not store an entire security object, but only an abstraction of * it. This interface therefore provides a simple way to compare these abstracted security * identities with other security identities and actual security objects. * </p> * * @author Ben Alex */ public interface Sid extends Serializable { // ~ Methods // ======================================================================================================== /** * Refer to the <code>java.lang.Object</code> documentation for the interface * contract. * * @param obj to be compared * * @return <code>true</code> if the objects are equal, <code>false</code> otherwise */ boolean equals(Object obj); /** * Refer to the <code>java.lang.Object</code> documentation for the interface * contract. * * @return a hash code representation of this object */ int hashCode(); }