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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package java.rmi.activation;
import java.rmi.server.UID;
/**
* The identifier for a registered activation group serves several
* purposes: <ul>
* <li>identifies the group uniquely within the activation system, and
* <li>contains a reference to the group's activation system so that the
* group can contact its activation system when necessary.</ul><p>
*
* The <code>ActivationGroupID</code> is returned from the call to
* <code>ActivationSystem.registerGroup</code> and is used to identify
* the group within the activation system. This group id is passed
* as one of the arguments to the activation group's special constructor
* when an activation group is created/recreated.
*
* @author Ann Wollrath
* @see ActivationGroup
* @see ActivationGroupDesc
* @since 1.2
*/
public class ActivationGroupID implements java.io.Serializable {
/**
* @serial The group's activation system.
*/
private ActivationSystem system;
/**
* @serial The group's unique id.
*/
private UID uid = new UID();
/** indicate compatibility with the Java 2 SDK v1.2 version of class */
private static final long serialVersionUID = -1648432278909740833L;
/**
* Constructs a unique group id.
*
* @param system the group's activation system
* @throws UnsupportedOperationException if and only if activation is
* not supported by this implementation
* @since 1.2
*/
public ActivationGroupID(ActivationSystem system) {
this.system = system;
}
/**
* Returns the group's activation system.
* @return the group's activation system
* @since 1.2
*/
public ActivationSystem getSystem() {
return system;
}
/**
* Returns a hashcode for the group's identifier. Two group
* identifiers that refer to the same remote group will have the
* same hash code.
*
* @see java.util.Hashtable
* @since 1.2
*/
public int hashCode() {
return uid.hashCode();
}
/**
* Compares two group identifiers for content equality.
* Returns true if both of the following conditions are true:
* 1) the unique identifiers are equivalent (by content), and
* 2) the activation system specified in each
* refers to the same remote object.
*
* @param obj the Object to compare with
* @return true if these Objects are equal; false otherwise.
* @see java.util.Hashtable
* @since 1.2
*/
public boolean equals(Object obj) {
if (this == obj) {
return true;
} else if (obj instanceof ActivationGroupID) {
ActivationGroupID id = (ActivationGroupID)obj;
return (uid.equals(id.uid) && system.equals(id.system));
} else {
return false;
}
}
}