1 /* 2 * Copyright (C) 2011 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 5 * in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the License 10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 11 * or implied. See the License for the specific language governing permissions and limitations under 12 * the License. 13 */ 14 15 package com.google.common.collect; 16 17 import com.google.common.annotations.GwtCompatible; 18 19 /** 20 * Indicates whether an endpoint of some range is contained in the range itself ("closed") or not 21 * ("open"). If a range is unbounded on a side, it is neither open nor closed on that side; the 22 * bound simply does not exist. 23 * 24 * @since 10.0 25 */ 26 @GwtCompatible 27 public enum BoundType { 28 /** 29 * The endpoint value <i>is not</i> considered part of the set ("exclusive"). 30 */ 31 OPEN { 32 @Override flip()33 BoundType flip() { 34 return CLOSED; 35 } 36 }, 37 /** 38 * The endpoint value <i>is</i> considered part of the set ("inclusive"). 39 */ 40 CLOSED { 41 @Override flip()42 BoundType flip() { 43 return OPEN; 44 } 45 }; 46 47 /** 48 * Returns the bound type corresponding to a boolean value for inclusivity. 49 */ forBoolean(boolean inclusive)50 static BoundType forBoolean(boolean inclusive) { 51 return inclusive ? CLOSED : OPEN; 52 } 53 flip()54 abstract BoundType flip(); 55 } 56