1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 *
19 */
20 package org.apache.mina.statemachine.annotation;
21
22 import java.lang.annotation.ElementType;
23 import java.lang.annotation.Retention;
24 import java.lang.annotation.RetentionPolicy;
25 import java.lang.annotation.Target;
26
27 import org.apache.mina.core.filterchain.IoFilter;
28 import org.apache.mina.statemachine.StateMachine;
29 import org.apache.mina.statemachine.event.IoFilterEvents;
30
31 /**
32 * Annotation used on methods to indicate that the method handles a specific
33 * kind of {@link IoFilterEvents} event when in a specific state. This should
34 * be used when creating {@link StateMachine}s for MINA's {@link IoFilter}
35 * interface.
36 *
37 * @author The Apache MINA Project (dev@mina.apache.org)
38 */
39 @Retention(RetentionPolicy.RUNTIME)
40 @Target(ElementType.METHOD)
41 @TransitionAnnotation(IoFilterTransitions.class)
42 public @interface IoFilterTransition {
43 /**
44 * Specifies the ids of one or more events handled by the annotated method. If
45 * not specified the handler method will be executed for any event.
46 */
47 IoFilterEvents[] on() default IoFilterEvents.ANY;
48
49 /**
50 * The id of the state or states that this handler applies to. Must be
51 * specified.
52 */
53 String[] in();
54
55 /**
56 * The id of the state the {@link StateMachine} should move to next after
57 * executing the annotated method. If not specified the {@link StateMachine}
58 * will remain in the same state.
59 */
60 String next() default Transition.SELF;
61
62 /**
63 * The weight used to order handler annotations which match the same event
64 * in the same state. Transitions with lower weight will be matched first. The
65 * default weight is 0.
66 */
67 int weight() default 0;
68 }