/*
* 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.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;
/**
* This is a simple implementation of {@link PrivilegePolicy} which uses the {@link Restrictable#getPrivilegeName()} to
* see if a given {@link Role} has the privilege required by the value from {@link Restrictable#getPrivilegeValue()}
*
* @author Robert von Burg <eitch@eitchnet.ch>
*/
public class DefaultPrivilege implements PrivilegePolicy {
/**
* The value of {@link Restrictable#getPrivilegeValue()} is used to check if the {@link Role} has this privilege
*
* @see li.strolch.privilege.policy.PrivilegePolicy#validateAction(IPrivilege, Restrictable)
*/
@Override
public void validateAction(PrivilegeContext ctx, IPrivilege privilege, Restrictable restrictable) {
PrivilegePolicyHelper.preValidate(privilege, restrictable);
// get the value on which the action is to be performed
Object object = restrictable.getPrivilegeValue();
// DefaultPrivilege policy expects the privilege value to be a string
if (!(object instanceof String)) {
String msg = Restrictable.class.getName()
+ PrivilegeMessages.getString("Privilege.illegalArgument.nonstring"); //$NON-NLS-1$
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;
String privilegeValue = (String) object;
PrivilegePolicyHelper.checkByAllowDenyValues(ctx, privilege, restrictable, privilegeValue);
}
}