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;
022
023/**
024 * Generates {@code List<Character>} instances for test suites.
025 *
026 * @author Kevin Bourrillion
027 * @author Louis Wasserman
028 */
029@GwtCompatible
030public abstract class TestCharacterListGenerator implements TestListGenerator<Character> {
031  @Override
032  public SampleElements<Character> samples() {
033    return new Chars();
034  }
035
036  @Override
037  public List<Character> create(Object... elements) {
038    Character[] array = new Character[elements.length];
039    int i = 0;
040    for (Object e : elements) {
041      array[i++] = (Character) e;
042    }
043    return create(array);
044  }
045
046  /**
047   * Creates a new collection containing the given elements; implement this method instead of {@link
048   * #create(Object...)}.
049   */
050  protected abstract List<Character> create(Character[] elements);
051
052  @Override
053  public Character[] createArray(int length) {
054    return new Character[length];
055  }
056
057  /** Returns the original element list, unchanged. */
058  @Override
059  public List<Character> order(List<Character> insertionOrder) {
060    return insertionOrder;
061  }
062}