2 * Copyright 2005 the original author or authors.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package org.wamblee.usermgt;
22 * Represents a set of groups. A typical implemnetation would be, a readonly implementation
23 * defined in a configuration file or a list of groups defined in a database.
25 * @author Erik Brakkee
27 public interface GroupSet {
30 * Must be called when the group has been modified to notify the group set.
31 * @param aGroup Group that was modified.
33 void groupModified(Group aGroup);
36 * Finds the group by name.
37 * @param aName Group name.
38 * @return Group or null if not found.
40 Group find(String aName);
43 * Determines if the group exists.
44 * @param aGroup Group.
45 * @return True iff the group exists.
47 boolean contains(Group aGroup);
50 * Adds a group. If the group already exists, the existing group set
52 * @param aGroup Group.
54 boolean add(Group aGroup);
57 * Removes a group. If the group does not exist, this method is a no-op.
58 * @param aGroup Group to remove.
59 * @return True if the group was removed, false otherwise.
61 boolean remove(Group aGroup);
64 * Returns the current groups.
70 * @return The number of groups.