/*
 * Copyright (c) 2016 Goldman Sachs.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v. 1.0 which accompany this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 */

package org.eclipse.collections.impl.list.immutable;

import java.io.Serializable;
import java.util.RandomAccess;

import org.eclipse.collections.api.block.procedure.Procedure;
import org.eclipse.collections.api.list.ImmutableList;
import org.eclipse.collections.impl.factory.Lists;

This is a three element immutable List which is created by calling Immutable.newListWith(one, two, three) method.
/** * This is a three element immutable List which is created by calling * Immutable.newListWith(one, two, three) method. */
final class ImmutableTripletonList<T> extends AbstractImmutableList<T> implements Serializable, RandomAccess { private static final long serialVersionUID = 1L; private final T element1; private final T element2; private final T element3; ImmutableTripletonList(T obj1, T obj2, T obj3) { this.element1 = obj1; this.element2 = obj2; this.element3 = obj3; } @Override public int size() { return 3; } @Override public void each(Procedure<? super T> procedure) { procedure.value(this.element1); procedure.value(this.element2); procedure.value(this.element3); } @Override public T get(int index) { switch (index) { case 0: return this.element1; case 1: return this.element2; case 2: return this.element3; default: throw new IndexOutOfBoundsException("Index: " + index + ", Size: " + this.size()); } } @Override public T getOnly() { throw new IllegalStateException("Size must be 1 but was " + this.size()); } @Override public ImmutableList<T> newWith(T newItem) { return Lists.immutable.with(this.element1, this.element2, this.element3, newItem); } }