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 java.util.Collections; 20 import java.util.EnumSet; 21 import java.util.Iterator; 22 import java.util.ListIterator; 23 import java.util.Set; 24 25 /** 26 * A method supported by implementations of the {@link Iterator} or 27 * {@link ListIterator} interface. 28 * 29 * <p>This enum is GWT compatible. 30 * 31 * @author Chris Povirk 32 */ 33 public enum IteratorFeature { 34 /** 35 * Support for {@link Iterator#remove()}. 36 */ 37 SUPPORTS_REMOVE, 38 /** 39 * Support for {@link ListIterator#add(Object)}; ignored for plain 40 * {@link Iterator} implementations. 41 */ 42 SUPPORTS_ADD, 43 /** 44 * Support for {@link ListIterator#set(Object)}; ignored for plain 45 * {@link Iterator} implementations. 46 */ 47 SUPPORTS_SET; 48 49 /** 50 * A set containing none of the optional features of the {@link Iterator} or 51 * {@link ListIterator} interfaces. 52 */ 53 public static final Set<IteratorFeature> UNMODIFIABLE = 54 Collections.emptySet(); 55 56 /** 57 * A set containing all of the optional features of the {@link Iterator} and 58 * {@link ListIterator} interfaces. 59 */ 60 public static final Set<IteratorFeature> MODIFIABLE = 61 Collections.unmodifiableSet(EnumSet.allOf(IteratorFeature.class)); 62 } 63