001/*
002 * Copyright (C) 2008 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 java.util.List;
021import java.util.Map;
022import java.util.Map.Entry;
023
024/**
025 * Implementation helper for {@link TestMapGenerator} for use with maps of strings.
026 *
027 * @author Chris Povirk
028 * @author Jared Levy
029 * @author George van den Driessche
030 */
031@GwtCompatible
032@ElementTypesAreNonnullByDefault
033public abstract class TestStringMapGenerator implements TestMapGenerator<String, String> {
034
035  @Override
036  public SampleElements<Entry<String, String>> samples() {
037    return new SampleElements<>(
038        Helpers.mapEntry("one", "January"),
039        Helpers.mapEntry("two", "February"),
040        Helpers.mapEntry("three", "March"),
041        Helpers.mapEntry("four", "April"),
042        Helpers.mapEntry("five", "May"));
043  }
044
045  @Override
046  public Map<String, String> create(Object... entries) {
047    @SuppressWarnings("unchecked")
048    Entry<String, String>[] array = (Entry<String, String>[]) new Entry<?, ?>[entries.length];
049    int i = 0;
050    for (Object o : entries) {
051      @SuppressWarnings("unchecked")
052      Entry<String, String> e = (Entry<String, String>) o;
053      array[i++] = e;
054    }
055    return create(array);
056  }
057
058  protected abstract Map<String, String> create(Entry<String, String>[] entries);
059
060  @Override
061  @SuppressWarnings("unchecked")
062  public final Entry<String, String>[] createArray(int length) {
063    return (Entry<String, String>[]) new Entry<?, ?>[length];
064  }
065
066  @Override
067  public final String[] createKeyArray(int length) {
068    return new String[length];
069  }
070
071  @Override
072  public final String[] createValueArray(int length) {
073    return new String[length];
074  }
075
076  /** Returns the original element list, unchanged. */
077  @Override
078  public Iterable<Entry<String, String>> order(List<Entry<String, String>> insertionOrder) {
079    return insertionOrder;
080  }
081}