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/*
 * 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,
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 * See the License for the specific language governing permissions and
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 */

package org.apache.hudi.common.util.collection;

/**
 * (NOTE: Adapted from Apache commons-lang3)
 * 

* An immutable triple consisting of three {@code Object} elements. *

* *

* Although the implementation is immutable, there is no restriction on the objects that may be stored. If mutable * objects are stored in the triple, then the triple itself effectively becomes mutable. The class is also * {@code final}, so a subclass can not add undesirable behaviour. *

* *

* #ThreadSafe# if all three objects are thread-safe *

* * @param the left element type * @param the middle element type * @param the right element type */ public final class ImmutableTriple extends Triple { /** * Serialization version. */ private static final long serialVersionUID = 1L; /** * Left object. */ public final L left; /** * Middle object. */ public final M middle; /** * Right object. */ public final R right; /** *

* Obtains an immutable triple of from three objects inferring the generic types. *

* *

* This factory allows the triple to be created using inference to obtain the generic types. *

* * @param the left element type * @param the middle element type * @param 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 ImmutableTriple of(final L left, final M middle, final R right) { return new ImmutableTriple(left, middle, right); } /** * 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 ImmutableTriple(final L left, final M middle, final R right) { super(); 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; } }




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