| // Copyright 2010 The Apache Software Foundation |
| // |
| // Licensed 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.tapestry5.internal.transform; |
| |
| import org.apache.tapestry5.runtime.ComponentEvent; |
| import org.apache.tapestry5.services.MethodAccess; |
| |
| /** |
| * Supplies one parameter value when invoking a component event handler method. In general, |
| * this involves extracting a value form the event's context and coercing it to a type |
| * appropriate to the parameter. |
| * <p> |
| * These values are accumulated and used to invoke the event handler method via |
| * {@link MethodAccess#invoke(Object, Object...)}. |
| * |
| * @since 5.2.0 |
| */ |
| public interface EventHandlerMethodParameterSource |
| { |
| /** |
| * Extract the value and coerce it to the correct type. |
| * |
| * @return value that can be passed as a method parameter |
| */ |
| Object valueForEventHandlerMethodParameter(ComponentEvent event); |
| } |