com.ovea.tajin.framework.async.guava.HandlerFindingStrategy.groovy Maven / Gradle / Ivy

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/*
 * 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.ovea.tajin.framework.async.guava;

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} instances.
     *
     * @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, EventHandler> findAllHandlers(Object source);

}