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.Collection; 29bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnorimport java.util.Collections; 30bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnorimport java.util.Comparator; 31bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnorimport java.util.List; 32bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnorimport java.util.RandomAccess; 33bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 34bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor/** 35bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Static utility methods pertaining to {@code long} primitives, that are not 36bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * already found in either {@link Long} or {@link Arrays}. 37bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 38bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @author Kevin Bourrillion 391d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * @since 1.0 40bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 411d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert@GwtCompatible(emulated = true) 42bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnorpublic final class Longs { 43bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor private Longs() {} 44bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 45bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 46bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * The number of bytes required to represent a primitive {@code long} 47bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * value. 48bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 49bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static final int BYTES = Long.SIZE / Byte.SIZE; 50bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 51bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 521d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * The largest power of two that can be represented as a {@code long}. 531d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 541d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * @since 10.0 551d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 561d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public static final long MAX_POWER_OF_TWO = 1L << (Long.SIZE - 2); 571d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 581d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert /** 59bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns a hash code for {@code value}; equal to the result of invoking 60bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * {@code ((Long) value).hashCode()}. 61bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 621d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * <p>This method always return the value specified by {@link 631d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Long#hashCode()} in java, which might be different from 641d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * {@code ((Long) value).hashCode()} in GWT because {@link Long#hashCode()} 651d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * in GWT does not obey the JRE contract. 661d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 67bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param value a primitive {@code long} value 68bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @return a hash code for the value 69bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 70bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static int hashCode(long value) { 71bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return (int) (value ^ (value >>> 32)); 72bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 73bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 74bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 75bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Compares the two specified {@code long} values. The sign of the value 76bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * returned is the same as that of {@code ((Long) a).compareTo(b)}. 77bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 78bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param a the first {@code long} to compare 79bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param b the second {@code long} to compare 80bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @return a negative value if {@code a} is less than {@code b}; a positive 81bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * value if {@code a} is greater than {@code b}; or zero if they are equal 82bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 83bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static int compare(long a, long b) { 84bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return (a < b) ? -1 : ((a > b) ? 1 : 0); 85bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 86bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 87bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 88bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns {@code true} if {@code target} is present as an element anywhere in 89bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * {@code array}. 90bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 91bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param array an array of {@code long} values, possibly empty 92bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param target a primitive {@code long} value 93bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @return {@code true} if {@code array[i] == target} for some value of {@code 94bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * i} 95bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 96bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static boolean contains(long[] array, long target) { 97bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (long value : array) { 98bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (value == target) { 99bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return true; 100bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 101bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 102bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return false; 103bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 104bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 105bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 106bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns the index of the first appearance of the value {@code target} in 107bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * {@code array}. 108bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 109bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param array an array of {@code long} values, possibly empty 110bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param target a primitive {@code long} value 111bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @return the least index {@code i} for which {@code array[i] == target}, or 112bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * {@code -1} if no such index exists. 113bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 114bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static int indexOf(long[] array, long target) { 115bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return indexOf(array, target, 0, array.length); 116bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 117bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 1181d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // TODO(kevinb): consider making this public 119bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor private static int indexOf( 120bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor long[] array, long target, int start, int end) { 121bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int i = start; i < end; i++) { 122bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (array[i] == target) { 123bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return i; 124bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 125bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 126bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return -1; 127bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 128bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 129bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 130bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns the start position of the first occurrence of the specified {@code 131bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * target} within {@code array}, or {@code -1} if there is no such occurrence. 132bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 133bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * <p>More formally, returns the lowest index {@code i} such that {@code 134bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * java.util.Arrays.copyOfRange(array, i, i + target.length)} contains exactly 135bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * the same elements as {@code target}. 136bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 137bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param array the array to search for the sequence {@code target} 138bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param target the array to search for as a sub-sequence of {@code array} 139bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 140bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static int indexOf(long[] array, long[] target) { 141bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor checkNotNull(array, "array"); 142bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor checkNotNull(target, "target"); 143bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (target.length == 0) { 144bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return 0; 145bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 146bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 147bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor outer: 148bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int i = 0; i < array.length - target.length + 1; i++) { 149bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int j = 0; j < target.length; j++) { 150bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (array[i + j] != target[j]) { 151bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor continue outer; 152bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 153bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 154bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return i; 155bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 156bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return -1; 157bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 158bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 159bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 160bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns the index of the last appearance of the value {@code target} in 161bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * {@code array}. 162bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 163bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param array an array of {@code long} values, possibly empty 164bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param target a primitive {@code long} value 165bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @return the greatest index {@code i} for which {@code array[i] == target}, 166bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * or {@code -1} if no such index exists. 167bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 168bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static int lastIndexOf(long[] array, long target) { 169bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return lastIndexOf(array, target, 0, array.length); 170bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 171bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 1721d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // TODO(kevinb): consider making this public 173bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor private static int lastIndexOf( 174bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor long[] array, long target, int start, int end) { 175bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int i = end - 1; i >= start; i--) { 176bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (array[i] == target) { 177bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return i; 178bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 179bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 180bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return -1; 181bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 182bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 183bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 184bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns the least value present in {@code array}. 185bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 186bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param array a <i>nonempty</i> array of {@code long} values 187bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @return the value present in {@code array} that is less than or equal to 188bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * every other value in the array 189bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @throws IllegalArgumentException if {@code array} is empty 190bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 191bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static long min(long... array) { 192bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor checkArgument(array.length > 0); 193bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor long min = array[0]; 194bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int i = 1; i < array.length; i++) { 195bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (array[i] < min) { 196bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor min = array[i]; 197bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 198bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 199bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return min; 200bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 201bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 202bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 203bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns the greatest value present in {@code array}. 204bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 205bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param array a <i>nonempty</i> array of {@code long} values 206bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @return the value present in {@code array} that is greater than or equal to 207bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * every other value in the array 208bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @throws IllegalArgumentException if {@code array} is empty 209bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 210bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static long max(long... array) { 211bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor checkArgument(array.length > 0); 212bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor long max = array[0]; 213bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int i = 1; i < array.length; i++) { 214bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (array[i] > max) { 215bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor max = array[i]; 216bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 217bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 218bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return max; 219bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 220bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 221bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 222bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns the values from each provided array combined into a single array. 223bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * For example, {@code concat(new long[] {a, b}, new long[] {}, new 224bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * long[] {c}} returns the array {@code {a, b, c}}. 225bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 226bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param arrays zero or more {@code long} arrays 227bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @return a single array containing all the values from the source arrays, in 228bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * order 229bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 230bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static long[] concat(long[]... arrays) { 231bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int length = 0; 232bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (long[] array : arrays) { 233bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor length += array.length; 234bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 235bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor long[] result = new long[length]; 236bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int pos = 0; 237bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (long[] array : arrays) { 238bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor System.arraycopy(array, 0, result, pos, array.length); 239bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor pos += array.length; 240bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 241bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return result; 242bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 243bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 244bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 245bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns an array containing the same values as {@code array}, but 246bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * guaranteed to be of a specified minimum length. If {@code array} already 247bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * has a length of at least {@code minLength}, it is returned directly. 248bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Otherwise, a new array of size {@code minLength + padding} is returned, 249bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * containing the values of {@code array}, and zeroes in the remaining places. 250bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 251bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param array the source array 252bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param minLength the minimum length the returned array must guarantee 253bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param padding an extra amount to "grow" the array by if growth is 254bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * necessary 255bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @throws IllegalArgumentException if {@code minLength} or {@code padding} is 256bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * negative 257bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @return an array containing the values of {@code array}, with guaranteed 258bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * minimum length {@code minLength} 259bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 260bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static long[] ensureCapacity( 261bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor long[] array, int minLength, int padding) { 262bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor checkArgument(minLength >= 0, "Invalid minLength: %s", minLength); 263bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor checkArgument(padding >= 0, "Invalid padding: %s", padding); 264bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return (array.length < minLength) 265bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor ? copyOf(array, minLength + padding) 266bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor : array; 267bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 268bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 269bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor // Arrays.copyOf() requires Java 6 270bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor private static long[] copyOf(long[] original, int length) { 271bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor long[] copy = new long[length]; 272bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor System.arraycopy(original, 0, copy, 0, Math.min(original.length, length)); 273bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return copy; 274bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 275bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 276bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 277bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns a string containing the supplied {@code long} values separated 278bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * by {@code separator}. For example, {@code join("-", 1L, 2L, 3L)} returns 279bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * the string {@code "1-2-3"}. 280bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 281bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param separator the text that should appear between consecutive values in 282bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * the resulting string (but not at the start or end) 283bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param array an array of {@code long} values, possibly empty 284bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 285bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static String join(String separator, long... array) { 286bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor checkNotNull(separator); 287bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (array.length == 0) { 288bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return ""; 289bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 290bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 291bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor // For pre-sizing a builder, just get the right order of magnitude 292bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor StringBuilder builder = new StringBuilder(array.length * 10); 293bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor builder.append(array[0]); 294bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int i = 1; i < array.length; i++) { 295bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor builder.append(separator).append(array[i]); 296bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 297bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return builder.toString(); 298bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 299bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 300bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 301bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns a comparator that compares two {@code long} arrays 302bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * lexicographically. That is, it compares, using {@link 303bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * #compare(long, long)}), the first pair of values that follow any 304bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * common prefix, or when one array is a prefix of the other, treats the 305bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * shorter array as the lesser. For example, 306bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * {@code [] < [1L] < [1L, 2L] < [2L]}. 307bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 308bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * <p>The returned comparator is inconsistent with {@link 309bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Object#equals(Object)} (since arrays support only identity equality), but 310bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * it is consistent with {@link Arrays#equals(long[], long[])}. 311bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 312bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @see <a href="http://en.wikipedia.org/wiki/Lexicographical_order"> 3131d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Lexicographical order article at Wikipedia</a> 3141d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * @since 2.0 315bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 316bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static Comparator<long[]> lexicographicalComparator() { 317bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return LexicographicalComparator.INSTANCE; 318bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 319bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 320bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor private enum LexicographicalComparator implements Comparator<long[]> { 321bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor INSTANCE; 322bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 3231d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 324bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public int compare(long[] left, long[] right) { 325bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int minLength = Math.min(left.length, right.length); 326bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int i = 0; i < minLength; i++) { 327bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int result = Longs.compare(left[i], right[i]); 328bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (result != 0) { 329bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return result; 330bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 331bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 332bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return left.length - right.length; 333bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 334bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 335bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 336bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 337bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Copies a collection of {@code Long} instances into a new array of 338bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * primitive {@code long} values. 339bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 340bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * <p>Elements are copied from the argument collection as if by {@code 341bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * collection.toArray()}. Calling this method is as thread-safe as calling 342bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * that method. 343bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 344bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param collection a collection of {@code Long} objects 345bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @return an array containing the same values as {@code collection}, in the 346bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * same order, converted to primitives 347bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @throws NullPointerException if {@code collection} or any of its elements 348bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * is null 349bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 350bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static long[] toArray(Collection<Long> collection) { 351bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (collection instanceof LongArrayAsList) { 352bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return ((LongArrayAsList) collection).toLongArray(); 353bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 354bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 355bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor Object[] boxedArray = collection.toArray(); 356bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int len = boxedArray.length; 357bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor long[] array = new long[len]; 358bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int i = 0; i < len; i++) { 3591d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // checkNotNull for GWT (do not optimize) 3601d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert array[i] = (Long) checkNotNull(boxedArray[i]); 361bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 362bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return array; 363bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 364bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 365bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor /** 366bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Returns a fixed-size list backed by the specified array, similar to {@link 367bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * Arrays#asList(Object[])}. The list supports {@link List#set(int, Object)}, 368bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * but any attempt to set a value to {@code null} will result in a {@link 369bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * NullPointerException}. 370bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 371bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * <p>The returned list maintains the values, but not the identities, of 372bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * {@code Long} objects written to or read from it. For example, whether 373bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * {@code list.get(0) == list.get(0)} is true for the returned list is 374bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * unspecified. 375bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * 376bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @param backingArray the array to back the list 377bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @return a list view of the array 378bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor */ 379bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor public static List<Long> asList(long... backingArray) { 380bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (backingArray.length == 0) { 381bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return Collections.emptyList(); 382bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 383bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return new LongArrayAsList(backingArray); 384bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 385bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 386bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @GwtCompatible 387bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor private static class LongArrayAsList extends AbstractList<Long> 388bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor implements RandomAccess, Serializable { 389bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor final long[] array; 390bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor final int start; 391bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor final int end; 392bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 393bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor LongArrayAsList(long[] array) { 394bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor this(array, 0, array.length); 395bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 396bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 397bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor LongArrayAsList(long[] array, int start, int end) { 398bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor this.array = array; 399bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor this.start = start; 400bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor this.end = end; 401bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 402bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 403bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @Override public int size() { 404bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return end - start; 405bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 406bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 407bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @Override public boolean isEmpty() { 408bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return false; 409bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 410bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 411bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @Override public Long get(int index) { 412bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor checkElementIndex(index, size()); 413bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return array[start + index]; 414bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 415bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 416bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @Override public boolean contains(Object target) { 417bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor // Overridden to prevent a ton of boxing 418bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return (target instanceof Long) 419bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor && Longs.indexOf(array, (Long) target, start, end) != -1; 420bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 421bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 422bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @Override public int indexOf(Object target) { 423bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor // Overridden to prevent a ton of boxing 424bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (target instanceof Long) { 425bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int i = Longs.indexOf(array, (Long) target, start, end); 426bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (i >= 0) { 427bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return i - start; 428bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 429bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 430bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return -1; 431bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 432bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 433bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @Override public int lastIndexOf(Object target) { 434bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor // Overridden to prevent a ton of boxing 435bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (target instanceof Long) { 436bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int i = Longs.lastIndexOf(array, (Long) target, start, end); 437bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (i >= 0) { 438bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return i - start; 439bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 440bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 441bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return -1; 442bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 443bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 444bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @Override public Long set(int index, Long element) { 445bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor checkElementIndex(index, size()); 446bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor long oldValue = array[start + index]; 4471d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert array[start + index] = checkNotNull(element); // checkNotNull for GWT (do not optimize) 448bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return oldValue; 449bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 450bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 4511d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override public List<Long> subList(int fromIndex, int toIndex) { 452bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int size = size(); 453bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor checkPositionIndexes(fromIndex, toIndex, size); 454bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (fromIndex == toIndex) { 455bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return Collections.emptyList(); 456bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 457bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return new LongArrayAsList(array, start + fromIndex, start + toIndex); 458bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 459bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 460bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @Override public boolean equals(Object object) { 461bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (object == this) { 462bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return true; 463bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 464bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (object instanceof LongArrayAsList) { 465bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor LongArrayAsList that = (LongArrayAsList) object; 466bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int size = size(); 467bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (that.size() != size) { 468bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return false; 469bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 470bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int i = 0; i < size; i++) { 471bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor if (array[start + i] != that.array[that.start + i]) { 472bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return false; 473bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 474bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 475bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return true; 476bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 477bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return super.equals(object); 478bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 479bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 480bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @Override public int hashCode() { 481bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int result = 1; 482bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int i = start; i < end; i++) { 483bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor result = 31 * result + Longs.hashCode(array[i]); 484bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 485bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return result; 486bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 487bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 488bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor @Override public String toString() { 489bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor StringBuilder builder = new StringBuilder(size() * 10); 490bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor builder.append('[').append(array[start]); 491bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor for (int i = start + 1; i < end; i++) { 492bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor builder.append(", ").append(array[i]); 493bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 494bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return builder.append(']').toString(); 495bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 496bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 497bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor long[] toLongArray() { 498bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor // Arrays.copyOfRange() requires Java 6 499bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor int size = size(); 500bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor long[] result = new long[size]; 501bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor System.arraycopy(array, start, result, 0, size); 502bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor return result; 503bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 504bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor 505bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor private static final long serialVersionUID = 0; 506bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor } 507bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor} 508