| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.guacamole.net.auth; |
| |
| import java.util.Collections; |
| import java.util.Set; |
| import org.apache.guacamole.GuacamoleException; |
| import org.apache.guacamole.GuacamoleSecurityException; |
| |
| /** |
| * An arbitrary set of existing objects sharing some common relation. Unlike a |
| * Directory, which provides for maintaining the entire lifecycle of its |
| * objects, a RelatedObjectSet only maintains the relation between its |
| * containing object and the objects within the set. Adding/removing an object |
| * from a RelatedObjectSet affects only the status of the specific relationship |
| * represented by the RelatedObjectSet, not the existence of the objects |
| * themselves. |
| */ |
| public interface RelatedObjectSet { |
| |
| /** |
| * Returns a Set which contains the identifiers of all objects contained |
| * within this RelatedObjectSet. |
| * |
| * @return |
| * A Set which contains the identifiers of all objects contained |
| * within this RelatedObjectSet. |
| * |
| * @throws GuacamoleException |
| * If an error occurs while retrieving the objects within the set, or |
| * if objects cannot be retrieved due to lack of permissions to do so. |
| */ |
| Set<String> getObjects() throws GuacamoleException; |
| |
| /** |
| * Adds the objects having the given identifiers, if not already present. |
| * If a specified object is already present, no operation is performed |
| * regarding that object. |
| * |
| * @param identifiers |
| * The identifiers of all objects being added. |
| * |
| * @throws GuacamoleException |
| * If an error occurs while adding the objects, or if permission to add |
| * objects is denied. |
| */ |
| void addObjects(Set<String> identifiers) throws GuacamoleException; |
| |
| /** |
| * Removes each of the objects having the specified identifiers, if |
| * present. If a specified object is not present, no operation is performed |
| * regarding that object. |
| * |
| * @param identifiers |
| * The identifiers of all objects being removed. |
| * |
| * @throws GuacamoleException |
| * If an error occurs while removing the objects, or if permission to |
| * remove objects is denied. |
| */ |
| void removeObjects(Set<String> identifiers) throws GuacamoleException; |
| |
| /** |
| * An immutable instance of RelatedObjectSEt which contains no objects. |
| */ |
| static final RelatedObjectSet EMPTY_SET = new RelatedObjectSet() { |
| |
| @Override |
| public Set<String> getObjects() throws GuacamoleException { |
| return Collections.emptySet(); |
| } |
| |
| @Override |
| public void addObjects(Set<String> identifiers) |
| throws GuacamoleException { |
| throw new GuacamoleSecurityException("Permission denied."); |
| } |
| |
| @Override |
| public void removeObjects(Set<String> identifiers) |
| throws GuacamoleException { |
| throw new GuacamoleSecurityException("Permission denied."); |
| } |
| |
| }; |
| |
| } |