01: /*
02: * Copyright 2007 Outerthought bvba and Schaubroeck nv
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
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.
15: */
16: package org.outerj.daisy.plugin;
17:
18: /**
19: * Interface to be implemented by the user of a particular
20: * type of plugin.
21: *
22: * <p>The {@link #pluginAdded} and {@link #pluginRemoved} methods will
23: * never be called concurrently by multiple threads.
24: */
25: public interface PluginUser<T> {
26: /**
27: * Notification of an available plugin.
28: *
29: * <p>Plugin users can be guaranteed that there won't be two
30: * plugins registred with the same name (unless previously removed via
31: * {@link #pluginRemoved}. The name also won't be null, an empty string,
32: * or a whitespace string.
33: */
34: void pluginAdded(PluginHandle<T> pluginHandle);
35:
36: void pluginRemoved(PluginHandle<T> pluginHandle);
37: }
|