01: /*
02: * Copyright 2004-2007 the original author or authors.
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.springframework.webflow.engine;
17:
18: import org.springframework.webflow.execution.RequestContext;
19:
20: /**
21: * A strategy for calculating the target state of a transition. This facilitates
22: * dynamic transition target state resolution that takes into account runtime
23: * contextual information.
24: *
25: * @author Keith Donald
26: */
27: public interface TargetStateResolver {
28:
29: /**
30: * Resolve the target state of the transition from the source state in the
31: * current request context. Should never return null.
32: * @param transition the transition
33: * @param sourceState the source state of the transition, could be null
34: * @param context the current request context
35: * @return the transition's target state
36: */
37: public State resolveTargetState(Transition transition,
38: State sourceState, RequestContext context);
39: }
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