1bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor/* 21d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Copyright (C) 2008 The Guava Authors 3bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 4bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Licensed under the Apache License, Version 2.0 (the "License"); 5bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * you may not use this file except in compliance with the License. 6bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * You may obtain a copy of the License at 7bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 8bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * http://www.apache.org/licenses/LICENSE-2.0 9bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 10bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Unless required by applicable law or agreed to in writing, software 11bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * distributed under the License is distributed on an "AS IS" BASIS, 12bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * See the License for the specific language governing permissions and 14bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * limitations under the License. 15bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 16bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 17bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnorpackage com.google.common.primitives; 18bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 191d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport static com.google.common.base.Preconditions.checkArgument; 201d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport static com.google.common.base.Preconditions.checkElementIndex; 211d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport static com.google.common.base.Preconditions.checkNotNull; 221d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport static com.google.common.base.Preconditions.checkPositionIndexes; 231d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 24bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnorimport com.google.common.annotations.GwtCompatible; 25bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 26bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnorimport java.io.Serializable; 27bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnorimport java.util.AbstractList; 28bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnorimport java.util.Arrays; 29bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnorimport java.util.BitSet; 30bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnorimport java.util.Collection; 31bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnorimport java.util.Collections; 32bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnorimport java.util.Comparator; 33bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnorimport java.util.List; 34bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnorimport java.util.RandomAccess; 35bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 36bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor/** 37bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Static utility methods pertaining to {@code boolean} primitives, that are not 38bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * already found in either {@link Boolean} or {@link Arrays}. 39bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 40bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @author Kevin Bourrillion 411d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * @since 1.0 42bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 43bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor@GwtCompatible 44bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnorpublic final class Booleans { 45bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor private Booleans() {} 46bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 47bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 48bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns a hash code for {@code value}; equal to the result of invoking 49bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * {@code ((Boolean) value).hashCode()}. 50bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 51bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param value a primitive {@code boolean} value 52bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @return a hash code for the value 53bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 54bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static int hashCode(boolean value) { 55bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return value ? 1231 : 1237; 56bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 57bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 58bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 59bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Compares the two specified {@code boolean} values in the standard way 60bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * ({@code false} is considered less than {@code true}). The sign of the 61bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * value returned is the same as that of {@code ((Boolean) a).compareTo(b)}. 62bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 63bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param a the first {@code boolean} to compare 64bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param b the second {@code boolean} to compare 651d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * @return a positive number if only {@code a} is {@code true}, a negative 66bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * number if only {@code b} is true, or zero if {@code a == b} 67bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 68bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static int compare(boolean a, boolean b) { 69bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return (a == b) ? 0 : (a ? 1 : -1); 70bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 71bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 72bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 73bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns {@code true} if {@code target} is present as an element anywhere in 74bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * {@code array}. 75bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 76bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * <p><b>Note:</b> consider representing the array as a {@link 77bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * BitSet} instead, replacing {@code Booleans.contains(array, true)} 78bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * with {@code !bitSet.isEmpty()} and {@code Booleans.contains(array, false)} 79bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * with {@code bitSet.nextClearBit(0) == sizeOfBitSet}. 80bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 81bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param array an array of {@code boolean} values, possibly empty 82bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param target a primitive {@code boolean} value 83bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @return {@code true} if {@code array[i] == target} for some value of {@code 84bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * i} 85bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 86bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static boolean contains(boolean[] array, boolean target) { 87bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (boolean value : array) { 88bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (value == target) { 89bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return true; 90bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 91bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 92bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return false; 93bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 94bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 95bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 96bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns the index of the first appearance of the value {@code target} in 97bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * {@code array}. 98bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 99bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * <p><b>Note:</b> consider representing the array as a {@link BitSet} 100bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * instead, and using {@link BitSet#nextSetBit(int)} or {@link 101bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * BitSet#nextClearBit(int)}. 102bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 103bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param array an array of {@code boolean} values, possibly empty 104bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param target a primitive {@code boolean} value 105bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @return the least index {@code i} for which {@code array[i] == target}, or 106bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * {@code -1} if no such index exists. 107bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 108bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static int indexOf(boolean[] array, boolean target) { 109bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return indexOf(array, target, 0, array.length); 110bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 111bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 1121d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // TODO(kevinb): consider making this public 113bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor private static int indexOf( 114bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor boolean[] array, boolean target, int start, int end) { 115bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int i = start; i < end; i++) { 116bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (array[i] == target) { 117bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return i; 118bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 119bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 120bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return -1; 121bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 122bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 123bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 124bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns the start position of the first occurrence of the specified {@code 125bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * target} within {@code array}, or {@code -1} if there is no such occurrence. 126bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 127bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * <p>More formally, returns the lowest index {@code i} such that {@code 128bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * java.util.Arrays.copyOfRange(array, i, i + target.length)} contains exactly 129bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * the same elements as {@code target}. 130bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 131bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param array the array to search for the sequence {@code target} 132bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param target the array to search for as a sub-sequence of {@code array} 133bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 134bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static int indexOf(boolean[] array, boolean[] target) { 135bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor checkNotNull(array, "array"); 136bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor checkNotNull(target, "target"); 137bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (target.length == 0) { 138bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return 0; 139bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 140bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 141bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor outer: 142bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int i = 0; i < array.length - target.length + 1; i++) { 143bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int j = 0; j < target.length; j++) { 144bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (array[i + j] != target[j]) { 145bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor continue outer; 146bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 147bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 148bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return i; 149bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 150bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return -1; 151bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 152bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 153bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 154bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns the index of the last appearance of the value {@code target} in 155bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * {@code array}. 156bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 157bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param array an array of {@code boolean} values, possibly empty 158bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param target a primitive {@code boolean} value 159bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @return the greatest index {@code i} for which {@code array[i] == target}, 160bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * or {@code -1} if no such index exists. 161bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 162bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static int lastIndexOf(boolean[] array, boolean target) { 163bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return lastIndexOf(array, target, 0, array.length); 164bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 165bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 1661d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // TODO(kevinb): consider making this public 167bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor private static int lastIndexOf( 168bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor boolean[] array, boolean target, int start, int end) { 169bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int i = end - 1; i >= start; i--) { 170bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (array[i] == target) { 171bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return i; 172bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 173bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 174bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return -1; 175bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 176bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 177bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 178bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns the values from each provided array combined into a single array. 179bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * For example, {@code concat(new boolean[] {a, b}, new boolean[] {}, new 180bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * boolean[] {c}} returns the array {@code {a, b, c}}. 181bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 182bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param arrays zero or more {@code boolean} arrays 183bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @return a single array containing all the values from the source arrays, in 184bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * order 185bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 186bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static boolean[] concat(boolean[]... arrays) { 187bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int length = 0; 188bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (boolean[] array : arrays) { 189bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor length += array.length; 190bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 191bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor boolean[] result = new boolean[length]; 192bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int pos = 0; 193bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (boolean[] array : arrays) { 194bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor System.arraycopy(array, 0, result, pos, array.length); 195bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor pos += array.length; 196bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 197bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return result; 198bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 199bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 200bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 201bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns an array containing the same values as {@code array}, but 202bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * guaranteed to be of a specified minimum length. If {@code array} already 203bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * has a length of at least {@code minLength}, it is returned directly. 204bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Otherwise, a new array of size {@code minLength + padding} is returned, 205bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * containing the values of {@code array}, and zeroes in the remaining places. 206bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 207bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param array the source array 208bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param minLength the minimum length the returned array must guarantee 209bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param padding an extra amount to "grow" the array by if growth is 210bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * necessary 211bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @throws IllegalArgumentException if {@code minLength} or {@code padding} is 212bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * negative 213bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @return an array containing the values of {@code array}, with guaranteed 214bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * minimum length {@code minLength} 215bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 216bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static boolean[] ensureCapacity( 217bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor boolean[] array, int minLength, int padding) { 218bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor checkArgument(minLength >= 0, "Invalid minLength: %s", minLength); 219bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor checkArgument(padding >= 0, "Invalid padding: %s", padding); 220bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return (array.length < minLength) 221bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor ? copyOf(array, minLength + padding) 222bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor : array; 223bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 224bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 225bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor // Arrays.copyOf() requires Java 6 226bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor private static boolean[] copyOf(boolean[] original, int length) { 227bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor boolean[] copy = new boolean[length]; 228bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor System.arraycopy(original, 0, copy, 0, Math.min(original.length, length)); 229bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return copy; 230bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 231bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 232bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 233bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns a string containing the supplied {@code boolean} values separated 234bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * by {@code separator}. For example, {@code join("-", false, true, false)} 235bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * returns the string {@code "false-true-false"}. 236bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 237bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param separator the text that should appear between consecutive values in 238bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * the resulting string (but not at the start or end) 239bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param array an array of {@code boolean} values, possibly empty 240bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 241bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static String join(String separator, boolean... array) { 242bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor checkNotNull(separator); 243bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (array.length == 0) { 244bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return ""; 245bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 246bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 247bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor // For pre-sizing a builder, just get the right order of magnitude 248bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor StringBuilder builder = new StringBuilder(array.length * 7); 249bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor builder.append(array[0]); 250bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int i = 1; i < array.length; i++) { 251bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor builder.append(separator).append(array[i]); 252bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 253bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return builder.toString(); 254bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 255bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 256bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 257bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns a comparator that compares two {@code boolean} arrays 258bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * lexicographically. That is, it compares, using {@link 259bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * #compare(boolean, boolean)}), the first pair of values that follow any 260bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * common prefix, or when one array is a prefix of the other, treats the 261bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * shorter array as the lesser. For example, 262bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * {@code [] < [false] < [false, true] < [true]}. 263bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 264bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * <p>The returned comparator is inconsistent with {@link 265bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Object#equals(Object)} (since arrays support only identity equality), but 266bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * it is consistent with {@link Arrays#equals(boolean[], boolean[])}. 267bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 268bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @see <a href="http://en.wikipedia.org/wiki/Lexicographical_order"> 2691d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Lexicographical order article at Wikipedia</a> 2701d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * @since 2.0 271bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 272bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static Comparator<boolean[]> lexicographicalComparator() { 273bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return LexicographicalComparator.INSTANCE; 274bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 275bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 276bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor private enum LexicographicalComparator implements Comparator<boolean[]> { 277bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor INSTANCE; 278bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 2791d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 280bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public int compare(boolean[] left, boolean[] right) { 281bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int minLength = Math.min(left.length, right.length); 282bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int i = 0; i < minLength; i++) { 283bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int result = Booleans.compare(left[i], right[i]); 284bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (result != 0) { 285bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return result; 286bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 287bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 288bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return left.length - right.length; 289bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 290bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 291bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 292bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 293bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Copies a collection of {@code Boolean} instances into a new array of 294bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * primitive {@code boolean} values. 295bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 296bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * <p>Elements are copied from the argument collection as if by {@code 297bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * collection.toArray()}. Calling this method is as thread-safe as calling 298bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * that method. 299bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 300bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * <p><b>Note:</b> consider representing the collection as a {@link 301bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * BitSet} instead. 302bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 303bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param collection a collection of {@code Boolean} objects 304bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @return an array containing the same values as {@code collection}, in the 305bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * same order, converted to primitives 306bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @throws NullPointerException if {@code collection} or any of its elements 307bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * is null 308bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 309bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static boolean[] toArray(Collection<Boolean> collection) { 310bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (collection instanceof BooleanArrayAsList) { 311bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return ((BooleanArrayAsList) collection).toBooleanArray(); 312bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 313bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 314bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor Object[] boxedArray = collection.toArray(); 315bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int len = boxedArray.length; 316bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor boolean[] array = new boolean[len]; 317bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int i = 0; i < len; i++) { 3181d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // checkNotNull for GWT (do not optimize) 3191d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert array[i] = (Boolean) checkNotNull(boxedArray[i]); 320bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 321bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return array; 322bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 323bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 324bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 325bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns a fixed-size list backed by the specified array, similar to {@link 326bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Arrays#asList(Object[])}. The list supports {@link List#set(int, Object)}, 327bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * but any attempt to set a value to {@code null} will result in a {@link 328bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * NullPointerException}. 329bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 330bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * <p>The returned list maintains the values, but not the identities, of 331bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * {@code Boolean} objects written to or read from it. For example, whether 332bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * {@code list.get(0) == list.get(0)} is true for the returned list is 333bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * unspecified. 334bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 335bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param backingArray the array to back the list 336bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @return a list view of the array 337bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 338bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static List<Boolean> asList(boolean... backingArray) { 339bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (backingArray.length == 0) { 340bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return Collections.emptyList(); 341bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 342bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return new BooleanArrayAsList(backingArray); 343bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 344bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 345bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @GwtCompatible 346bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor private static class BooleanArrayAsList extends AbstractList<Boolean> 347bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor implements RandomAccess, Serializable { 348bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor final boolean[] array; 349bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor final int start; 350bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor final int end; 351bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 352bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor BooleanArrayAsList(boolean[] array) { 353bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor this(array, 0, array.length); 354bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 355bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 356bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor BooleanArrayAsList(boolean[] array, int start, int end) { 357bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor this.array = array; 358bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor this.start = start; 359bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor this.end = end; 360bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 361bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 362bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @Override public int size() { 363bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return end - start; 364bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 365bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 366bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @Override public boolean isEmpty() { 367bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return false; 368bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 369bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 370bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @Override public Boolean get(int index) { 371bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor checkElementIndex(index, size()); 372bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return array[start + index]; 373bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 374bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 375bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @Override public boolean contains(Object target) { 376bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor // Overridden to prevent a ton of boxing 377bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return (target instanceof Boolean) 378bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor && Booleans.indexOf(array, (Boolean) target, start, end) != -1; 379bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 380bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 381bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @Override public int indexOf(Object target) { 382bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor // Overridden to prevent a ton of boxing 383bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (target instanceof Boolean) { 384bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int i = Booleans.indexOf(array, (Boolean) target, start, end); 385bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (i >= 0) { 386bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return i - start; 387bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 388bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 389bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return -1; 390bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 391bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 392bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @Override public int lastIndexOf(Object target) { 393bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor // Overridden to prevent a ton of boxing 394bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (target instanceof Boolean) { 395bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int i = Booleans.lastIndexOf(array, (Boolean) target, start, end); 396bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (i >= 0) { 397bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return i - start; 398bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 399bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 400bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return -1; 401bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 402bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 403bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @Override public Boolean set(int index, Boolean element) { 404bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor checkElementIndex(index, size()); 405bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor boolean oldValue = array[start + index]; 4061d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert array[start + index] = checkNotNull(element); // checkNotNull for GWT (do not optimize) 407bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return oldValue; 408bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 409bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 4101d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override public List<Boolean> subList(int fromIndex, int toIndex) { 411bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int size = size(); 412bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor checkPositionIndexes(fromIndex, toIndex, size); 413bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (fromIndex == toIndex) { 414bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return Collections.emptyList(); 415bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 416bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return new BooleanArrayAsList(array, start + fromIndex, start + toIndex); 417bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 418bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 419bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @Override public boolean equals(Object object) { 420bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (object == this) { 421bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return true; 422bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 423bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (object instanceof BooleanArrayAsList) { 424bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor BooleanArrayAsList that = (BooleanArrayAsList) object; 425bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int size = size(); 426bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (that.size() != size) { 427bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return false; 428bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 429bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int i = 0; i < size; i++) { 430bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (array[start + i] != that.array[that.start + i]) { 431bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return false; 432bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 433bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 434bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return true; 435bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 436bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return super.equals(object); 437bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 438bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 439bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @Override public int hashCode() { 440bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int result = 1; 441bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int i = start; i < end; i++) { 442bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor result = 31 * result + Booleans.hashCode(array[i]); 443bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 444bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return result; 445bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 446bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 447bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @Override public String toString() { 448bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor StringBuilder builder = new StringBuilder(size() * 7); 449bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor builder.append(array[start] ? "[true" : "[false"); 450bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int i = start + 1; i < end; i++) { 451bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor builder.append(array[i] ? ", true" : ", false"); 452bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 453bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return builder.append(']').toString(); 454bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 455bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 456bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor boolean[] toBooleanArray() { 457bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor // Arrays.copyOfRange() requires Java 6 458bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int size = size(); 459bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor boolean[] result = new boolean[size]; 460bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor System.arraycopy(array, start, result, 0, size); 461bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return result; 462bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 463bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 464bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor private static final long serialVersionUID = 0; 465bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 466bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor} 467