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| 1 | +package com.blankj.utilcode.util; |
| 2 | + |
| 3 | +import android.os.Build; |
| 4 | +import android.support.annotation.RequiresApi; |
| 5 | +import android.support.v4.util.SimpleArrayMap; |
| 6 | +import android.util.SparseArray; |
| 7 | +import android.util.SparseBooleanArray; |
| 8 | +import android.util.SparseIntArray; |
| 9 | +import android.util.SparseLongArray; |
| 10 | + |
| 11 | +import java.util.Collection; |
| 12 | +import java.util.Collections; |
| 13 | + |
| 14 | +/** |
| 15 | + * <pre> |
| 16 | + * author: blankj |
| 17 | + * blog : http://blankj.com |
| 18 | + * time : 2019/07/26 |
| 19 | + * desc : utils about container |
| 20 | + * </pre> |
| 21 | + */ |
| 22 | +public final class ContainerUtils { |
| 23 | + |
| 24 | + private ContainerUtils() { |
| 25 | + throw new UnsupportedOperationException("u can't instantiate me..."); |
| 26 | + } |
| 27 | + |
| 28 | + public static <T> boolean isEmpty(T[] arr) { |
| 29 | + return arr == null || arr.length == 0; |
| 30 | + } |
| 31 | + |
| 32 | + public static boolean isEmpty(final Collection obj) { |
| 33 | + return obj == null || obj.isEmpty(); |
| 34 | + } |
| 35 | + |
| 36 | + public static boolean isEmpty(final java.util.Map obj) { |
| 37 | + return obj == null || obj.isEmpty(); |
| 38 | + } |
| 39 | + |
| 40 | + public static boolean isEmpty(final SimpleArrayMap obj) { |
| 41 | + return obj == null || obj.isEmpty(); |
| 42 | + } |
| 43 | + |
| 44 | + public static boolean isEmpty(final SparseArray obj) { |
| 45 | + return obj == null || obj.size() == 0; |
| 46 | + } |
| 47 | + |
| 48 | + public static boolean isEmpty(final SparseBooleanArray obj) { |
| 49 | + return obj == null || obj.size() == 0; |
| 50 | + } |
| 51 | + |
| 52 | + public static boolean isEmpty(final SparseIntArray obj) { |
| 53 | + return obj == null || obj.size() == 0; |
| 54 | + } |
| 55 | + |
| 56 | + public static boolean isEmpty(final android.support.v4.util.LongSparseArray obj) { |
| 57 | + return obj == null || obj.size() == 0; |
| 58 | + } |
| 59 | + |
| 60 | + @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN) |
| 61 | + public static boolean isEmpty(final android.util.LongSparseArray obj) { |
| 62 | + return obj == null || obj.size() == 0; |
| 63 | + } |
| 64 | + |
| 65 | + @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR2) |
| 66 | + public static boolean isEmpty(final SparseLongArray obj) { |
| 67 | + return obj == null || obj.size() == 0; |
| 68 | + } |
| 69 | + |
| 70 | + public static <V> boolean isNotEmpty(V[] obj) { |
| 71 | + return !isEmpty(obj); |
| 72 | + } |
| 73 | + |
| 74 | + public static boolean isNotEmpty(final Collection obj) { |
| 75 | + return !isEmpty(obj); |
| 76 | + } |
| 77 | + |
| 78 | + public static boolean isNotEmpty(final java.util.Map obj) { |
| 79 | + return !isEmpty(obj); |
| 80 | + } |
| 81 | + |
| 82 | + public static boolean isNotEmpty(final SimpleArrayMap obj) { |
| 83 | + return !isEmpty(obj); |
| 84 | + } |
| 85 | + |
| 86 | + public static boolean isNotEmpty(final SparseArray obj) { |
| 87 | + return !isEmpty(obj); |
| 88 | + } |
| 89 | + |
| 90 | + public static boolean isNotEmpty(final SparseBooleanArray obj) { |
| 91 | + return !isEmpty(obj); |
| 92 | + } |
| 93 | + |
| 94 | + public static boolean isNotEmpty(final SparseIntArray obj) { |
| 95 | + return !isEmpty(obj); |
| 96 | + } |
| 97 | + |
| 98 | + public static boolean isNotEmpty(final android.support.v4.util.LongSparseArray obj) { |
| 99 | + return !isEmpty(obj); |
| 100 | + } |
| 101 | + |
| 102 | + @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN) |
| 103 | + public static boolean isNotEmpty(final android.util.LongSparseArray obj) { |
| 104 | + return !isEmpty(obj); |
| 105 | + } |
| 106 | + |
| 107 | + @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR2) |
| 108 | + public static boolean isNotEmpty(final SparseLongArray obj) { |
| 109 | + return !isEmpty(obj); |
| 110 | + } |
| 111 | + |
| 112 | + |
| 113 | + public static final class Array { |
| 114 | + |
| 115 | + private Array() { |
| 116 | + throw new UnsupportedOperationException("u can't instantiate me..."); |
| 117 | + } |
| 118 | + |
| 119 | + public static <T> int getSize(final T[] arr) { |
| 120 | + if (isEmpty(arr)) return 0; |
| 121 | + return arr.length; |
| 122 | + } |
| 123 | + |
| 124 | + public static <T> void reverse(final T[] arr) { |
| 125 | + int size = getSize(arr); |
| 126 | + if (size <= 1) return; |
| 127 | + int mid = size >> 1; |
| 128 | + T tmp; |
| 129 | + for (int i = 0; i < mid; i++) { |
| 130 | + tmp = arr[i]; |
| 131 | + arr[i] = arr[size - i - 1]; |
| 132 | + arr[size - i - 1] = tmp; |
| 133 | + } |
| 134 | + } |
| 135 | + } |
| 136 | + |
| 137 | + |
| 138 | + public static final class List { |
| 139 | + |
| 140 | + private List() { |
| 141 | + throw new UnsupportedOperationException("u can't instantiate me..."); |
| 142 | + } |
| 143 | + |
| 144 | + public static <T> int getSize(java.util.List<T> list) { |
| 145 | + if (isEmpty(list)) return 0; |
| 146 | + return list.size(); |
| 147 | + } |
| 148 | + |
| 149 | + public static <V> void reverse(java.util.List<V> list) { |
| 150 | + if (getSize(list) <= 1) return; |
| 151 | + Collections.reverse(list); |
| 152 | + } |
| 153 | + |
| 154 | + } |
| 155 | + |
| 156 | + |
| 157 | + public static final class Map { |
| 158 | + |
| 159 | + private Map() { |
| 160 | + throw new UnsupportedOperationException("u can't instantiate me..."); |
| 161 | + } |
| 162 | + |
| 163 | + public static <K, V> int getSize(java.util.Map<K, V> map) { |
| 164 | + if (isEmpty(map)) return 0; |
| 165 | + return map.size(); |
| 166 | + } |
| 167 | + |
| 168 | + |
| 169 | + } |
| 170 | + |
| 171 | + |
| 172 | +} |
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