1 /* 2 * Copyright (C) 2008 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 com.google.common.annotations.GwtCompatible; 20 21 import java.util.List; 22 import java.util.Map; 23 import java.util.Set; 24 25 /** 26 * Creates map entries using sample keys and sample values. 27 * 28 * @author Jesse Wilson 29 */ 30 @GwtCompatible 31 public abstract class TestMapEntrySetGenerator<K, V> 32 implements TestSetGenerator<Map.Entry<K, V>> { 33 private final SampleElements<K> keys; 34 private final SampleElements<V> values; 35 TestMapEntrySetGenerator( SampleElements<K> keys, SampleElements<V> values)36 protected TestMapEntrySetGenerator( 37 SampleElements<K> keys, SampleElements<V> values) { 38 this.keys = keys; 39 this.values = values; 40 } 41 42 @Override samples()43 public SampleElements<Map.Entry<K, V>> samples() { 44 return SampleElements.mapEntries(keys, values); 45 } 46 47 @Override create(Object... elements)48 public Set<Map.Entry<K, V>> create(Object... elements) { 49 Map.Entry<K, V>[] entries = createArray(elements.length); 50 System.arraycopy(elements, 0, entries, 0, elements.length); 51 return createFromEntries(entries); 52 } 53 createFromEntries( Map.Entry<K, V>[] entries)54 public abstract Set<Map.Entry<K, V>> createFromEntries( 55 Map.Entry<K, V>[] entries); 56 57 @Override 58 @SuppressWarnings("unchecked") // generic arrays make typesafety sad createArray(int length)59 public Map.Entry<K, V>[] createArray(int length) { 60 return new Map.Entry[length]; 61 } 62 63 /** Returns the original element list, unchanged. */ 64 @Override order(List<Map.Entry<K, V>> insertionOrder)65 public List<Map.Entry<K, V>> order(List<Map.Entry<K, V>> insertionOrder) { 66 return insertionOrder; 67 } 68 } 69