V1.2 新构架

2026-10-24 19:00:04 +08:00 · 2021-02-20 16:45:44 +08:00
parent c2d95a1833
commit 4d76decf73
343 changed files with 41333 additions and 4 deletions
@@ -0,0 +1,63 @@
+using System.IO;
+using System.Linq;
+using System.Reflection;
+
+// ReSharper disable once CheckNamespace
+namespace System
+{
+    public static class ReflectionExtensions
+    {
+        const string TAG = "ReflectionEx";
+
+        /// <summary>
+        /// 检索应用于指定程序集的指定类型的自定义特性。
+        /// <para>如果发生 <see cref="FileNotFoundException"/> 将返回 <see langword="null"/></para>
+        /// </summary>
+        /// <param name="assembly"></param>
+        /// <param name="attrType"></param>
+        /// <returns></returns>
+        public static Attribute[]? GetCustomAttributesSafe(this Assembly assembly, Type attrType)
+        {
+            try
+            {
+                return assembly.GetCustomAttributes(attrType).ToArray();
+            }
+            catch (FileNotFoundException)
+            {
+                // Sometimes the previewer doesn't actually have everything required for these loads to work
+                Log.Warn(TAG, "Could not load assembly: {0} for Attribute {1} | Some renderers may not be loaded", assembly.FullName, attrType.FullName);
+            }
+
+            return null;
+        }
+
+        public static T GetRequiredCustomAttribute<T>(this Assembly assembly) where T : Attribute
+        {
+            var requiredCustomAttribute = assembly.GetCustomAttribute<T>();
+            if (requiredCustomAttribute == null)
+                throw new NullReferenceException(nameof(requiredCustomAttribute));
+            return requiredCustomAttribute;
+        }
+
+        static bool IsNullableType(this Type t)
+        {
+            return t.IsGenericType && t.GetGenericTypeDefinition() == typeof(Nullable<>);
+        }
+
+        /// <summary>
+        /// 类型是否为 <see cref="Nullable{T}"/> 可空类型
+        /// </summary>
+        /// <param name="t"></param>
+        /// <returns></returns>
+        public static bool IsNullable(this Type t)
+        {
+            if (t.IsValueType) // 值类型(struct)进行可空判断
+            {
+                return IsNullableType(t);
+            }
+            return true; // 引用类型(class)都可空
+        }
+
+        public static bool IsStatic(this Type t) => t.IsAbstract && t.IsSealed;
+    }
+}