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.execution.factory;
17:
18: import org.springframework.webflow.definition.FlowDefinition;
19:
20: /**
21: * Strategy interface that determines if a flow execution listener should attach
22: * to executions of a specific flow definition.
23: * <p>
24: * This selection strategy is typically used by the
25: * {@link FlowExecutionListenerLoader} to determine which listeners
26: * should apply to which flow definitions.
27: *
28: * @see org.springframework.webflow.execution.FlowExecution
29: * @see org.springframework.webflow.execution.FlowExecutionListener
30: * @see org.springframework.webflow.execution.factory.FlowExecutionListenerLoader
31: *
32: * @author Keith Donald
33: * @author Erwin Vervaet
34: */
35: public interface FlowExecutionListenerCriteria {
36:
37: /**
38: * Do the listeners guarded by this criteria object apply to the provided
39: * flow definition?
40: * @param definition the flow definition
41: * @return true if yes, false if no
42: */
43: public boolean appliesTo(FlowDefinition definition);
44: }
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