| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.commons.lang3.tuple; |
| |
| /** |
| * <p>A mutable triple consisting of three {@code Object} elements.</p> |
| * |
| * <p>Not #ThreadSafe#</p> |
| * |
| * @param <L> the left element type |
| * @param <M> the middle element type |
| * @param <R> the right element type |
| * |
| * @since 3.2 |
| */ |
| public class MutableTriple<L, M, R> extends Triple<L, M, R> { |
| |
| /** |
| * The empty array singleton. |
| * <p> |
| * Consider using {@link #emptyArray()} to avoid generics warnings. |
| * </p> |
| * |
| * @since 3.10. |
| */ |
| public static final MutableTriple<?, ?, ?>[] EMPTY_ARRAY = new MutableTriple[0]; |
| |
| /** Serialization version */ |
| private static final long serialVersionUID = 1L; |
| |
| /** |
| * Returns the empty array singleton that can be assigned without compiler warning. |
| * |
| * @param <L> the left element type |
| * @param <M> the middle element type |
| * @param <R> the right element type |
| * @return the empty array singleton that can be assigned without compiler warning. |
| * |
| * @since 3.10. |
| */ |
| @SuppressWarnings("unchecked") |
| public static <L, M, R> MutableTriple<L, M, R>[] emptyArray() { |
| return (MutableTriple<L, M, R>[]) EMPTY_ARRAY; |
| } |
| |
| /** |
| * <p>Obtains a mutable triple of three objects inferring the generic types.</p> |
| * |
| * <p>This factory allows the triple to be created using inference to |
| * obtain the generic types.</p> |
| * |
| * @param <L> the left element type |
| * @param <M> the middle element type |
| * @param <R> the right element type |
| * @param left the left element, may be null |
| * @param middle the middle element, may be null |
| * @param right the right element, may be null |
| * @return a triple formed from the three parameters, not null |
| */ |
| public static <L, M, R> MutableTriple<L, M, R> of(final L left, final M middle, final R right) { |
| return new MutableTriple<>(left, middle, right); |
| } |
| /** Left object */ |
| public L left; |
| /** Middle object */ |
| public M middle; |
| |
| /** Right object */ |
| public R right; |
| |
| /** |
| * Create a new triple instance of three nulls. |
| */ |
| public MutableTriple() { |
| } |
| |
| /** |
| * Create a new triple instance. |
| * |
| * @param left the left value, may be null |
| * @param middle the middle value, may be null |
| * @param right the right value, may be null |
| */ |
| public MutableTriple(final L left, final M middle, final R right) { |
| this.left = left; |
| this.middle = middle; |
| this.right = right; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public L getLeft() { |
| return left; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public M getMiddle() { |
| return middle; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public R getRight() { |
| return right; |
| } |
| |
| /** |
| * Sets the left element of the triple. |
| * |
| * @param left the new value of the left element, may be null |
| */ |
| public void setLeft(final L left) { |
| this.left = left; |
| } |
| |
| /** |
| * Sets the middle element of the triple. |
| * |
| * @param middle the new value of the middle element, may be null |
| */ |
| public void setMiddle(final M middle) { |
| this.middle = middle; |
| } |
| |
| /** |
| * Sets the right element of the triple. |
| * |
| * @param right the new value of the right element, may be null |
| */ |
| public void setRight(final R right) { |
| this.right = right; |
| } |
| } |
| |