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 import java.util.Collections; 21 import java.util.EnumSet; 22 import java.util.Iterator; 23 import java.util.ListIterator; 24 import java.util.Set; 25 26 /** 27 * A method supported by implementations of the {@link Iterator} or {@link ListIterator} interface. 28 * 29 * <p>This enum is GWT compatible. 30 * 31 * @author Chris Povirk 32 */ 33 @GwtCompatible 34 public enum IteratorFeature { 35 /** Support for {@link Iterator#remove()}. */ 36 SUPPORTS_REMOVE, 37 /** 38 * Support for {@link ListIterator#add(Object)}; ignored for plain {@link Iterator} 39 * implementations. 40 */ 41 SUPPORTS_ADD, 42 /** 43 * Support for {@link ListIterator#set(Object)}; ignored for plain {@link Iterator} 44 * implementations. 45 */ 46 SUPPORTS_SET; 47 48 /** 49 * A set containing none of the optional features of the {@link Iterator} or {@link ListIterator} 50 * interfaces. 51 */ 52 public static final Set<IteratorFeature> UNMODIFIABLE = Collections.emptySet(); 53 54 /** 55 * A set containing all of the optional features of the {@link Iterator} and {@link ListIterator} 56 * interfaces. 57 */ 58 public static final Set<IteratorFeature> MODIFIABLE = 59 Collections.unmodifiableSet(EnumSet.allOf(IteratorFeature.class)); 60 } 61