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A plugin API for Minecraft: Java Edition

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/*
 * This file is part of SpongeAPI, licensed under the MIT License (MIT).
 *
 * Copyright (c) SpongePowered 
 * 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.spongepowered.api.entity.attribute;

import org.spongepowered.api.entity.Entity;
import org.spongepowered.api.entity.attribute.type.AttributeType;

import java.util.Optional;
import java.util.function.Supplier;

/**
 * Represents an {@link Entity} which can hold {@link Attribute}s.
 */
public interface AttributeHolder {

    /**
     * Gets an {@link Attribute} from this entity
     *
     * @param type The attribute type.
     * @return An attribute, if present.
     */
    default Optional attribute(final Supplier type) {
        return this.attribute(type.get());
    }

    /**
     * Gets an {@link Attribute} from this entity
     *
     * @param type The attribute type.
     * @return An attribute, if present.
     */
    Optional attribute(final AttributeType type);
}