EventActionSet.java

/*
 * This file is part of ElementalArrows, licensed under the MIT License (MIT).
 *
 * Copyright (c) LanternPowered <https://github.com/Cybermaxke/ElementalArrows>
 * Copyright (c) contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the Software), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.lanternpowered.elementalarrows.event;

import org.spongepowered.api.event.Event;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

public final class EventActionSet {

    private final Map<EventAction, Class<?>> actions = new HashMap<>();

    public void add(EventAction<Event> action) {
        this.actions.put(action, Event.class);
    }

    public <E extends Event> void add(Class<E> type, EventAction<E> action) {
        this.actions.put(action, type);
    }

    public <E extends Event> EventAction<E> get(Class<E> event) {
        //noinspection unchecked
        final List<EventAction<E>> actions = (List) this.actions.entrySet().stream()
                .filter(entry -> event.isAssignableFrom(entry.getValue()))
                .map(Map.Entry::getKey)
                .collect(Collectors.toList());
        return e -> actions.forEach(action -> action.accept(e));
    }
}