/* * This file is part of LanternServer, licensed under the MIT License (MIT). * * Copyright (c) LanternPowered <https://www.lanternpowered.org> * Copyright (c) SpongePowered <https://www.spongepowered.org> * 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.server.component; import java.util.Collection; import java.util.Optional; public interface ComponentHolder { /** * Attempts to add the component of the specified type to holder if it's not present and * returns it. This method may return a {@link IllegalArgumentException} * if the component type isn't applicable for this component holder. * * @param type the component type * @return the component */ <T extends Component> T addComponent(Class<T> type); /** * Gets the component of the specified type from the holder if it's present. * * @param type the component type * @return the component */ <T extends Component> Optional<T> getComponent(Class<T> type); /** * Gets all components of the specified type (or a child implementation). * * @param type the component type * @return the components */ <T extends Component> Collection<T> getAllComponents(Class<T> type); /** * Gets the component of the specified type (not a child implementation) * from the holder if it is present. * * @param type the component type * @return the component */ <T extends Component> Optional<T> getExactComponent(Class<T> type); /** * Attempts to remove the component of the specified type from the holder. * * @param type the component type * @return the component */ <T extends Component> Optional<T> removeComponent(Class<T> type); }