/*
* Copyright 2013 Robert von Burg <eitch@eitchnet.ch>
*
* 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 li.strolch.privilege.policy;
import java.text.MessageFormat;
import li.strolch.privilege.base.PrivilegeException;
import li.strolch.privilege.handler.PrivilegeHandler;
import li.strolch.privilege.i18n.PrivilegeMessages;
import li.strolch.privilege.model.IPrivilege;
import li.strolch.privilege.model.PrivilegeContext;
import li.strolch.privilege.model.Restrictable;
import li.strolch.privilege.model.internal.Role;
import li.strolch.utils.collections.Tuple;
import li.strolch.utils.dbc.DBC;
/**
* This {@link PrivilegePolicy} expects a {@link Tuple} as {@link Restrictable#getPrivilegeValue()}. The Tuple must
* contain {@link Role} as first and second value. Then the policy decides depending on the user specific privileges
* (see {@link PrivilegeHandler}), uses the basic <code>Allow</code> and <code>Deny</code> to detect if the username of
* the certificate is allowed
*
* @author Robert von Burg <eitch@eitchnet.ch>
*/
public class RoleAccessPrivilege implements PrivilegePolicy {
@Override
public void validateAction(PrivilegeContext ctx, IPrivilege privilege, Restrictable restrictable) {
String privilegeName = PrivilegePolicyHelper.preValidate(privilege, restrictable);
// get the value on which the action is to be performed
Object object = restrictable.getPrivilegeValue();
// if the object is null, then it means the validation is that the privilege must exist
if (object == null)
return;
// RoleAccessPrivilege policy expects the privilege value to be a role
if (!(object instanceof Tuple)) {
String msg = Restrictable.class.getName()
+ PrivilegeMessages.getString("Privilege.illegalArgument.nontuple"); //$NON-NLS-1$
msg = MessageFormat.format(msg, restrictable.getClass().getSimpleName());
throw new PrivilegeException(msg);
}
// if everything is allowed, then no need to carry on
if (privilege.isAllAllowed())
return;
Tuple tuple = (Tuple) object;
// get role name as privilege value
Role oldRole = tuple.getFirst();
Role newRole = tuple.getSecond();
switch (privilegeName) {
case PrivilegeHandler.PRIVILEGE_GET_ROLE: {
DBC.INTERIM.assertNull("For " + privilegeName + " first must be null!", oldRole);
DBC.INTERIM.assertNotNull("For " + privilegeName + " second must not be null!", newRole);
String privilegeValue = newRole.getName();
PrivilegePolicyHelper.checkByAllowDenyValues(ctx, privilege, restrictable, privilegeValue);
break;
}
case PrivilegeHandler.PRIVILEGE_ADD_ROLE: {
DBC.INTERIM.assertNull("For " + privilegeName + " first must be null!", oldRole);
DBC.INTERIM.assertNotNull("For " + privilegeName + " second must not be null!", newRole);
String privilegeValue = newRole.getName();
PrivilegePolicyHelper.checkByAllowDenyValues(ctx, privilege, restrictable, privilegeValue);
break;
}
case PrivilegeHandler.PRIVILEGE_MODIFY_ROLE: {
DBC.INTERIM.assertNotNull("For " + privilegeName + " first must not be null!", oldRole);
DBC.INTERIM.assertNotNull("For " + privilegeName + " second must not be null!", newRole);
String privilegeValue = newRole.getName();
DBC.INTERIM.assertEquals("oldRole and newRole names must be the same", oldRole.getName(), privilegeValue);
PrivilegePolicyHelper.checkByAllowDenyValues(ctx, privilege, restrictable, privilegeValue);
break;
}
case PrivilegeHandler.PRIVILEGE_REMOVE_ROLE: {
DBC.INTERIM.assertNull("For " + privilegeName + " first must be null!", oldRole);
DBC.INTERIM.assertNotNull("For " + privilegeName + " second must not be null!", newRole);
String privilegeValue = newRole.getName();
PrivilegePolicyHelper.checkByAllowDenyValues(ctx, privilege, restrictable, privilegeValue);
break;
}
default:
String msg = Restrictable.class.getName()
+ PrivilegeMessages.getString("Privilege.roleAccessPrivilege.unknownPrivilege"); //$NON-NLS-1$
msg = MessageFormat.format(msg, privilegeName);
throw new PrivilegeException(msg);
}
}
}