GUACAMOLE-220: Add SimpleUserGroup (read-only UserGroup implementation with no members).

guacamole-ext/src/main/java/org/apache/guacamole/net/auth/simple/SimpleUserGroup.java

@@ -0,0 +1,118 @@
+/*
+ * 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.simple;
+
+import java.util.Collections;
+import java.util.Map;
+import org.apache.guacamole.GuacamoleException;
+import org.apache.guacamole.net.auth.AbstractIdentifiable;
+import org.apache.guacamole.net.auth.RelatedObjectSet;
+import org.apache.guacamole.net.auth.UserGroup;
+import org.apache.guacamole.net.auth.permission.ObjectPermissionSet;
+import org.apache.guacamole.net.auth.permission.SystemPermissionSet;
+
+/**
+ * A read-only UserGroup implementation which has no members.
+ */
+public class SimpleUserGroup extends AbstractIdentifiable implements UserGroup {
+
+    /**
+     * Creates a completely uninitialized SimpleUserGroup.
+     */
+    public SimpleUserGroup() {
+    }
+
+    /**
+     * Creates a new SimpleUserGroup having the given identifier.
+     *
+     * @param identifier
+     *     The identifier to assign to this SimpleUserGroup.
+     */
+    public SimpleUserGroup(String identifier) {
+        super.setIdentifier(identifier);
+    }
+
+    @Override
+    public Map<String, String> getAttributes() {
+        return Collections.<String, String>emptyMap();
+    }
+
+    @Override
+    public void setAttributes(Map<String, String> attributes) {
+        // Do nothing - there are no attributes
+    }
+
+    @Override
+    public SystemPermissionSet getSystemPermissions()
+            throws GuacamoleException {
+        return new SimpleSystemPermissionSet();
+    }
+
+    @Override
+    public ObjectPermissionSet getConnectionPermissions()
+            throws GuacamoleException {
+        return new SimpleObjectPermissionSet();
+    }
+
+    @Override
+    public ObjectPermissionSet getConnectionGroupPermissions()
+            throws GuacamoleException {
+        return new SimpleObjectPermissionSet();
+    }
+
+    @Override
+    public ObjectPermissionSet getUserPermissions()
+            throws GuacamoleException {
+        return new SimpleObjectPermissionSet();
+    }
+
+    @Override
+    public ObjectPermissionSet getUserGroupPermissions()
+            throws GuacamoleException {
+        return new SimpleObjectPermissionSet();
+    }
+
+    @Override
+    public ObjectPermissionSet getActiveConnectionPermissions()
+            throws GuacamoleException {
+        return new SimpleObjectPermissionSet();
+    }
+
+    @Override
+    public ObjectPermissionSet getSharingProfilePermissions() {
+        return new SimpleObjectPermissionSet();
+    }
+
+    @Override
+    public RelatedObjectSet getUserGroups() throws GuacamoleException {
+        return new SimpleRelatedObjectSet();
+    }
+
+    @Override
+    public RelatedObjectSet getMemberUsers() throws GuacamoleException {
+        return new SimpleRelatedObjectSet();
+    }
+
+    @Override
+    public RelatedObjectSet getMemberUserGroups() throws GuacamoleException {
+        return new SimpleRelatedObjectSet();
+    }
+
+}