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      1 /*
      2  * Copyright (C) 2009 The Guava Authors
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  * http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.google.common.collect.testing;
     18 
     19 import java.util.List;
     20 import java.util.Map;
     21 import java.util.Map.Entry;
     22 
     23 /**
     24  * Implementation helper for {@link TestMapGenerator} for use with enum maps.
     25  *
     26  * <p>This class is GWT compatible.
     27  *
     28  * @author Kevin Bourrillion
     29  */
     30 public abstract class TestEnumMapGenerator
     31     implements TestMapGenerator<AnEnum, String> {
     32 
     33   @Override
     34   public SampleElements<Entry<AnEnum, String>> samples() {
     35     return new SampleElements<Entry<AnEnum, String>>(
     36         Helpers.mapEntry(AnEnum.A, "January"),
     37         Helpers.mapEntry(AnEnum.B, "February"),
     38         Helpers.mapEntry(AnEnum.C, "March"),
     39         Helpers.mapEntry(AnEnum.D, "April"),
     40         Helpers.mapEntry(AnEnum.E, "May")
     41     );
     42   }
     43 
     44   @Override
     45   public final Map<AnEnum, String> create(Object... entries) {
     46     @SuppressWarnings("unchecked")
     47     Entry<AnEnum, String>[] array = new Entry[entries.length];
     48     int i = 0;
     49     for (Object o : entries) {
     50       @SuppressWarnings("unchecked")
     51       Entry<AnEnum, String> e = (Entry<AnEnum, String>) o;
     52       array[i++] = e;
     53     }
     54     return create(array);
     55   }
     56 
     57   protected abstract Map<AnEnum, String> create(
     58       Entry<AnEnum, String>[] entries);
     59 
     60   @Override
     61   @SuppressWarnings("unchecked")
     62   public final Entry<AnEnum, String>[] createArray(int length) {
     63     return new Entry[length];
     64   }
     65 
     66   @Override
     67   public final AnEnum[] createKeyArray(int length) {
     68     return new AnEnum[length];
     69   }
     70 
     71   @Override
     72   public final String[] createValueArray(int length) {
     73     return new String[length];
     74   }
     75 
     76   /** Returns the original element list, unchanged. */
     77   @Override
     78   public Iterable<Entry<AnEnum, String>> order(
     79       List<Entry<AnEnum, String>> insertionOrder) {
     80     return insertionOrder;
     81   }
     82 }