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/*
 * Copyright (c) 2016-2021 VMware Inc. or its affiliates, All Rights Reserved.
 *
 * 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
 *
 *   https://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 reactor.util.function;

import java.util.Objects;
import java.util.function.Function;

import reactor.util.annotation.NonNull;
import reactor.util.annotation.Nullable;

/**
 * A tuple that holds seven non-null values
 *
 * @param  The type of the first non-null value held by this tuple
 * @param  The type of the second non-null value held by this tuple
 * @param  The type of the third non-null value held by this tuple
 * @param  The type of the fourth non-null value held by this tuple
 * @param  The type of the fifth non-null value held by this tuple
 * @param  The type of the sixth non-null value held by this tuple
 * @param  The type of the seventh non-null value held by this tuple
 * @author Jon Brisbin
 * @author Stephane Maldini
 */
public class Tuple7 extends Tuple6 {

	private static final long serialVersionUID = -8002391247456579281L;

	@NonNull final T7 t7;

	Tuple7(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7) {
		super( t1, t2, t3, t4, t5, t6);
		this.t7 = Objects.requireNonNull(t7, "t7");
	}

	/**
	 * Type-safe way to get the seventh object of this {@link Tuples}.
	 *
	 * @return The seventh object
	 */
	public T7 getT7() {
		return t7;
	}

	/**
	 * Map the 1st part (T1) of this {@link Tuple7} into a different value and type,
	 * keeping the other parts.
	 *
	 * @param mapper the mapping {@link Function} for the T1 part
	 * @param  the new type for the T1 part
	 * @return a new {@link Tuple7} with a different T1 value
	 */
	public  Tuple7 mapT1(Function mapper) {
		return new Tuple7<>(mapper.apply(t1), t2, t3, t4, t5, t6, t7);
	}

	/**
	 * Map the 2nd part (T2) of this {@link Tuple7} into a different value and type,
	 * keeping the other parts.
	 *
	 * @param mapper the mapping {@link Function} for the T2 part
	 * @param  the new type for the T2 part
	 * @return a new {@link Tuple7} with a different T2 value
	 */
	public  Tuple7 mapT2(Function mapper) {
		return new Tuple7<>(t1, mapper.apply(t2), t3, t4, t5, t6, t7);
	}

	/**
	 * Map the 3rd part (T3) of this {@link Tuple7} into a different value and type,
	 * keeping the other parts.
	 *
	 * @param mapper the mapping {@link Function} for the T3 part
	 * @param  the new type for the T3 part
	 * @return a new {@link Tuple7} with a different T3 value
	 */
	public  Tuple7 mapT3(Function mapper) {
		return new Tuple7<>(t1, t2, mapper.apply(t3), t4, t5, t6, t7);
	}

	/**
	 * Map the 4th part (T4) of this {@link Tuple7} into a different value and type,
	 * keeping the other parts.
	 *
	 * @param mapper the mapping {@link Function} for the T4 part
	 * @param  the new type for the T4 part
	 * @return a new {@link Tuple7} with a different T4 value
	 */
	public  Tuple7 mapT4(Function mapper) {
		return new Tuple7<>(t1, t2, t3, mapper.apply(t4), t5, t6, t7);
	}

	/**
	 * Map the 5th part (T5) of this {@link Tuple7} into a different value and type,
	 * keeping the other parts.
	 *
	 * @param mapper the mapping {@link Function} for the T5 part
	 * @param  the new type for the T5 part
	 * @return a new {@link Tuple7} with a different T5 value
	 */
	public  Tuple7 mapT5(Function mapper) {
		return new Tuple7<>(t1, t2, t3, t4, mapper.apply(t5), t6, t7);
	}

	/**
	 * Map the 6th part (T6) of this {@link Tuple7} into a different value and type,
	 * keeping the other parts.
	 *
	 * @param mapper the mapping {@link Function} for the T6 part
	 * @param  the new type for the T6 part
	 * @return a new {@link Tuple7} with a different T6 value
	 */
	public  Tuple7 mapT6(Function mapper) {
		return new Tuple7<>(t1, t2, t3, t4, t5, mapper.apply(t6), t7);
	}

	/**
	 * Map the 7th part (T7) of this {@link Tuple7} into a different value and type,
	 * keeping the other parts.
	 *
	 * @param mapper the mapping {@link Function} for the T7 part
	 * @param  the new type for the T7 part
	 * @return a new {@link Tuple7} with a different T7 value
	 */
	public  Tuple7 mapT7(Function mapper) {
		return new Tuple7<>(t1, t2, t3, t4, t5, t6, mapper.apply(t7));
	}

	@Nullable
	@Override
	public Object get(int index) {
		switch (index) {
			case 0:
				return t1;
			case 1:
				return t2;
			case 2:
				return t3;
			case 3:
				return t4;
			case 4:
				return t5;
			case 5:
				return t6;
			case 6:
				return t7;
			default:
				return null;
		}
	}

	@Override
	public Object[] toArray() {
		return new Object[]{t1, t2, t3, t4, t5, t6, t7};
	}

	@Override
	public boolean equals(@Nullable Object o) {
		if (this == o) return true;
		if (!(o instanceof Tuple7)) return false;
		if (!super.equals(o)) return false;

		@SuppressWarnings("rawtypes")
        Tuple7 tuple7 = (Tuple7) o;

		return t7.equals(tuple7.t7);

	}

	@Override
	public int hashCode() {
		int result = super.hashCode();
		result = 31 * result + t7.hashCode();
		return result;
	}

	@Override
	public int size() {
		return 7;
	}
}