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172 changes: 172 additions & 0 deletions
172
lib/utilcode/src/main/java/com/blankj/utilcode/util/ContainerUtils.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,172 @@ | ||
| package com.blankj.utilcode.util; | ||
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| import android.os.Build; | ||
| import android.support.annotation.RequiresApi; | ||
| import android.support.v4.util.SimpleArrayMap; | ||
| import android.util.SparseArray; | ||
| import android.util.SparseBooleanArray; | ||
| import android.util.SparseIntArray; | ||
| import android.util.SparseLongArray; | ||
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| import java.util.Collection; | ||
| import java.util.Collections; | ||
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| /** | ||
| * <pre> | ||
| * author: blankj | ||
| * blog : http://blankj.com | ||
| * time : 2019/07/26 | ||
| * desc : utils about container | ||
| * </pre> | ||
| */ | ||
| public final class ContainerUtils { | ||
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| private ContainerUtils() { | ||
| throw new UnsupportedOperationException("u can't instantiate me..."); | ||
| } | ||
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| public static <T> boolean isEmpty(T[] arr) { | ||
| return arr == null || arr.length == 0; | ||
| } | ||
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| public static boolean isEmpty(final Collection obj) { | ||
| return obj == null || obj.isEmpty(); | ||
| } | ||
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| public static boolean isEmpty(final java.util.Map obj) { | ||
| return obj == null || obj.isEmpty(); | ||
| } | ||
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| public static boolean isEmpty(final SimpleArrayMap obj) { | ||
| return obj == null || obj.isEmpty(); | ||
| } | ||
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| public static boolean isEmpty(final SparseArray obj) { | ||
| return obj == null || obj.size() == 0; | ||
| } | ||
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| public static boolean isEmpty(final SparseBooleanArray obj) { | ||
| return obj == null || obj.size() == 0; | ||
| } | ||
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| public static boolean isEmpty(final SparseIntArray obj) { | ||
| return obj == null || obj.size() == 0; | ||
| } | ||
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| public static boolean isEmpty(final android.support.v4.util.LongSparseArray obj) { | ||
| return obj == null || obj.size() == 0; | ||
| } | ||
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| @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN) | ||
| public static boolean isEmpty(final android.util.LongSparseArray obj) { | ||
| return obj == null || obj.size() == 0; | ||
| } | ||
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| @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR2) | ||
| public static boolean isEmpty(final SparseLongArray obj) { | ||
| return obj == null || obj.size() == 0; | ||
| } | ||
|
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| public static <V> boolean isNotEmpty(V[] obj) { | ||
| return !isEmpty(obj); | ||
| } | ||
|
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| public static boolean isNotEmpty(final Collection obj) { | ||
| return !isEmpty(obj); | ||
| } | ||
|
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| public static boolean isNotEmpty(final java.util.Map obj) { | ||
| return !isEmpty(obj); | ||
| } | ||
|
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| public static boolean isNotEmpty(final SimpleArrayMap obj) { | ||
| return !isEmpty(obj); | ||
| } | ||
|
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| public static boolean isNotEmpty(final SparseArray obj) { | ||
| return !isEmpty(obj); | ||
| } | ||
|
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| public static boolean isNotEmpty(final SparseBooleanArray obj) { | ||
| return !isEmpty(obj); | ||
| } | ||
|
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| public static boolean isNotEmpty(final SparseIntArray obj) { | ||
| return !isEmpty(obj); | ||
| } | ||
|
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| public static boolean isNotEmpty(final android.support.v4.util.LongSparseArray obj) { | ||
| return !isEmpty(obj); | ||
| } | ||
|
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| @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN) | ||
| public static boolean isNotEmpty(final android.util.LongSparseArray obj) { | ||
| return !isEmpty(obj); | ||
| } | ||
|
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| @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR2) | ||
| public static boolean isNotEmpty(final SparseLongArray obj) { | ||
| return !isEmpty(obj); | ||
| } | ||
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| public static final class Array { | ||
|
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| private Array() { | ||
| throw new UnsupportedOperationException("u can't instantiate me..."); | ||
| } | ||
|
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| public static <T> int getSize(final T[] arr) { | ||
| if (isEmpty(arr)) return 0; | ||
| return arr.length; | ||
| } | ||
|
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| public static <T> void reverse(final T[] arr) { | ||
| int size = getSize(arr); | ||
| if (size <= 1) return; | ||
| int mid = size >> 1; | ||
| T tmp; | ||
| for (int i = 0; i < mid; i++) { | ||
| tmp = arr[i]; | ||
| arr[i] = arr[size - i - 1]; | ||
| arr[size - i - 1] = tmp; | ||
| } | ||
| } | ||
| } | ||
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| public static final class List { | ||
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| private List() { | ||
| throw new UnsupportedOperationException("u can't instantiate me..."); | ||
| } | ||
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| public static <T> int getSize(java.util.List<T> list) { | ||
| if (isEmpty(list)) return 0; | ||
| return list.size(); | ||
| } | ||
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| public static <V> void reverse(java.util.List<V> list) { | ||
| if (getSize(list) <= 1) return; | ||
| Collections.reverse(list); | ||
| } | ||
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| } | ||
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| public static final class Map { | ||
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| private Map() { | ||
| throw new UnsupportedOperationException("u can't instantiate me..."); | ||
| } | ||
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| public static <K, V> int getSize(java.util.Map<K, V> map) { | ||
| if (isEmpty(map)) return 0; | ||
| return map.size(); | ||
| } | ||
|
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| } | ||
|
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|
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| } |
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