/*
* Copyright (C) 2007 The Guava Authors
*
* 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 com.google.common.eventbus;
import com.google.common.collect.Multimap;
/**
* A method for finding event handler methods in objects, for use by
* {@link EventBus}.
*
* @author Cliff Biffle
*/
interface HandlerFindingStrategy {
/**
* Finds all suitable event handler methods in {@code source}, organizes them
* by the type of event they handle, and wraps them in {@link EventHandler}s.
*
* @param source object whose handlers are desired.
* @return EventHandler objects for each handler method, organized by event
* type.
*
* @throws IllegalArgumentException if {@code source} is not appropriate for
* this strategy (in ways that this interface does not define).
*/
Multimap<Class<?>, EventHandler> findAllHandlers(Object source);
}
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