io.janusproject.kernel.space.RestrictedAccessEventSpaceImpl Maven / Gradle / Ivy
/*
* $Id$
*
* SARL is an general-purpose agent programming language.
* More details on http://www.sarl.io
*
* Copyright (C) 2014-2018 the original authors or authors.
*
* 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
*
* http://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 io.janusproject.kernel.space;
import java.security.Principal;
import java.security.acl.Acl;
import java.security.acl.Permission;
import io.janusproject.services.distributeddata.DistributedDataStructureService;
import io.sarl.lang.core.Address;
import io.sarl.lang.core.EventListener;
import io.sarl.lang.core.SpaceID;
import io.sarl.util.RestrictedAccessEventSpace;
/**
* Default implementation of a restricted-access event space.
*
* @author $Author: srodriguez$
* @author $Author: ngaud$
* @author $Author: sgalland$
* @version $FullVersion$
* @mavengroupid $GroupId$
* @mavenartifactid $ArtifactId$
*/
public class RestrictedAccessEventSpaceImpl extends AbstractEventSpace implements RestrictedAccessEventSpace {
private final Acl acl;
private final Permission accessPermission;
/**
* Constructs an event space.
*
* @param id identifier of the space.
* @param acl Access Control List
* @param accessPermission permission that corresponds to the registration in the space.
* @param factory factory that is used to create the internal data structure.
*/
public RestrictedAccessEventSpaceImpl(SpaceID id, Acl acl, Permission accessPermission,
DistributedDataStructureService factory) {
super(id, factory);
assert acl != null;
assert accessPermission != null;
this.acl = acl;
this.accessPermission = accessPermission;
}
/**
* Replies the Access Control List.
*
* @return the acl.
*/
public Acl getAcl() {
return this.acl;
}
/**
* Replies the permission to register into this space.
*
* @return the permission.
*/
public Permission getRegistrationPermission() {
return this.accessPermission;
}
@Override
public Address register(EventListener entity, Principal principal) {
if (this.acl.checkPermission(principal, this.accessPermission)) {
return getParticipantInternalDataStructure().registerParticipant(new Address(getSpaceID(), entity.getID()), entity);
}
return null;
}
@Override
public final Address register(P entity) {
return register(entity, entity);
}
@Override
public Address unregister(EventListener entity) {
return getParticipantInternalDataStructure().unregisterParticipant(entity);
}
}