001/* 002 * Copyright (C) 2007 The Guava Authors 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package com.google.common.collect.testing; 018 019import com.google.common.annotations.GwtCompatible; 020import com.google.common.collect.testing.SampleElements.Chars; 021import java.util.List; 022import org.jspecify.annotations.NullMarked; 023 024/** 025 * Generates {@code List<Character>} instances for test suites. 026 * 027 * @author Kevin Bourrillion 028 * @author Louis Wasserman 029 */ 030@GwtCompatible 031@NullMarked 032public abstract class TestCharacterListGenerator implements TestListGenerator<Character> { 033 @Override 034 public SampleElements<Character> samples() { 035 return new Chars(); 036 } 037 038 @Override 039 public List<Character> create(Object... elements) { 040 Character[] array = new Character[elements.length]; 041 int i = 0; 042 for (Object e : elements) { 043 array[i++] = (Character) e; 044 } 045 return create(array); 046 } 047 048 /** 049 * Creates a new collection containing the given elements; implement this method instead of {@link 050 * #create(Object...)}. 051 */ 052 protected abstract List<Character> create(Character[] elements); 053 054 @Override 055 public Character[] createArray(int length) { 056 return new Character[length]; 057 } 058 059 /** Returns the original element list, unchanged. */ 060 @Override 061 public List<Character> order(List<Character> insertionOrder) { 062 return insertionOrder; 063 } 064}