347 lines
12 KiB
C#
347 lines
12 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Reflection;
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using System.Text;
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namespace CYQ.Data.Tool
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{
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/// <summary>
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/// 反射工具（带缓存）
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/// </summary>
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public static class ReflectTool
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{
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/// <summary>
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/// 将PropertyInfo[] 改成PropertyInfo List，是因为.NET的CLR会引发内存读写异常（启用IntelliTrace时）
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/// </summary>
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static MDictionary<string, List<PropertyInfo>> propCache = new MDictionary<string, List<PropertyInfo>>();
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static MDictionary<string, List<FieldInfo>> fieldCache = new MDictionary<string, List<FieldInfo>>();
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static MDictionary<string, object[]> attrCache = new MDictionary<string, object[]>();
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static MDictionary<string, Type[]> argumentCache = new MDictionary<string, Type[]>();
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static MDictionary<int, bool> attrExistsCache = new MDictionary<int, bool>();
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/// <summary>
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/// 获取属性列表
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/// </summary>
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/// <param name="t"></param>
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/// <returns></returns>
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public static List<PropertyInfo> GetPropertyList(Type t)
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{
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bool isAnonymousType = t.Name.Contains("f__AnonymousType");//忽略匿名类型
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string key = t.FullName;// t.GUID.ToString();由泛型 XX<T> 引起的如： Ge<A> 和 Ge<B> ,Guid名相同,所以用FullName
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if (!isAnonymousType && propCache.ContainsKey(key))
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{
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return propCache[key];
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}
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else
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{
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bool isInheritOrm = t.BaseType != null && (t.BaseType.Name.StartsWith("OrmBase") || t.BaseType.Name.StartsWith("SimpleOrmBase"));
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PropertyInfo[] pInfo = isInheritOrm ? t.GetProperties(BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly) : t.GetProperties();
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List<PropertyInfo> list = new List<PropertyInfo>(pInfo.Length);
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try
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{
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list.AddRange(pInfo);
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if (!isAnonymousType)
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{
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propCache.Set(key, list);
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}
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}
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catch (Exception err)
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{
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Log.Write(err, LogType.Error);
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}
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return list;
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}
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}
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/// <summary>
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/// 获取Field列表
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/// </summary>
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public static List<FieldInfo> GetFieldList(Type t)
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{
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string key = t.GUID.ToString();
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if (fieldCache.ContainsKey(key))
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{
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return fieldCache[key];
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}
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else
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{
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bool isInheritOrm = t.BaseType != null && (t.BaseType.Name == "OrmBase" || t.BaseType.Name == "SimpleOrmBase");
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FieldInfo[] pInfo = isInheritOrm ? t.GetFields(BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly) : t.GetFields();
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List<FieldInfo> list = new List<FieldInfo>(pInfo.Length);
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try
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{
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list.AddRange(pInfo);
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fieldCache.Set(key, list);
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}
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catch (Exception err)
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{
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Log.Write(err, LogType.Error);
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}
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return list;
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}
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}
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/// <summary>
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/// 获取泛型的参数长度（非泛型按默认方法计算）
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/// </summary>
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public static int GetArgumentLength(ref Type t)
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{
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Type[] argTypes;
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return GetArgumentLength(ref t, out argTypes);
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}
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/// <summary>
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/// 获取泛型的参数长度，同时类型修改为普通类型（非泛型按默认方法计算）
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/// </summary>
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public static int GetArgumentLength(ref Type t, out Type[] argTypes)
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{
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argTypes = null;
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string key = t.FullName;
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if (argumentCache.ContainsKey(key))
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{
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argTypes = argumentCache[key];
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}
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else
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{
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int len = 0;
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if (t.IsGenericType)
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{
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#region MyRegion
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argTypes = t.GetGenericArguments();
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len = argTypes.Length;
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for (int i = 0; i < argTypes.Length; i++)
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{
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if (argTypes[i].IsGenericType && argTypes[i].Name.StartsWith("Nullable"))
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{
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argTypes[i] = Nullable.GetUnderlyingType(argTypes[i]);
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}
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}
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#endregion
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}
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else
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{
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#region 非泛型
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if (t.Name.EndsWith("[]"))
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{
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len = 1;
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argTypes = new Type[1] { t.GetElementType() };
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}
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else if (t.Name == "MDataRowCollection" || t.Name == "MDataColumn")
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{
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len = 1;
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}
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else if (t.Name == "NameValueCollection" || (t.BaseType != null && t.BaseType.Name == "NameValueCollection"))
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{
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len = 2;
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}
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else if (t.BaseType != null && t.BaseType.Name == "DbParameterCollection")
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{
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len = 1;
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}
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else
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{
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System.Reflection.MethodInfo[] mis = t.GetMethods();
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if (mis != null)
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{
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foreach (System.Reflection.MethodInfo mi in mis)
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{
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if (mi.Name == "Add")
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{
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len = mi.GetParameters().Length;
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break;
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}
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}
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}
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//System.Reflection.MethodInfo mi = t.GetMethod("Add");
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//if (mi != null)
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//{
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// len = mi.GetParameters().Length;
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//}
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}
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if (argTypes == null)
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{
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argTypes = new Type[len];
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for (int i = 0; i < argTypes.Length; i++)
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{
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argTypes[i] = typeof(object);
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}
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}
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#endregion
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}
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argumentCache.Set(key, argTypes);
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}
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if (t.IsGenericType)
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{
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if (t.Name.StartsWith("Nullable"))
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{
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t = Nullable.GetUnderlyingType(t);
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}
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else if (t.Name == "IList`1")
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{
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//List<int> a;typeof(List<int>);
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t = typeof(List<>).MakeGenericType(argTypes[0]);
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}
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else if (t.Name == "IDictionary`2")
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{
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t = typeof(Dictionary<,>).MakeGenericType(argTypes[0], argTypes[1]);
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}
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}
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return argTypes.Length;
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}
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public static object[] GetAttributes(FieldInfo fi, Type searchType)
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{
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return GetAttributes(fi.DeclaringType, searchType, null, fi);
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}
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public static object[] GetAttributes(PropertyInfo pi, Type searchType)
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{
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return GetAttributes(pi.DeclaringType, searchType, pi, null);
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}
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public static object[] GetAttributes(Type t, Type searchType)
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{
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return GetAttributes(t, searchType, null, null);
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}
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/// <summary>
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/// 获取特性列表
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/// </summary>
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private static object[] GetAttributes(Type t, Type searchType, PropertyInfo pi, FieldInfo fi)
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{
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string key = t.GUID.ToString();
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if (searchType != null)
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{
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key += searchType.Name;
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}
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if (pi != null)
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{
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key += pi.Name;
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}
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else if (fi != null)
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{
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key += fi.Name;
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}
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//key = key.GetHashCode().ToString();
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if (attrCache.ContainsKey(key))
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{
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return attrCache[key];
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}
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else
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{
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try
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{
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object[] items = null;
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if (pi != null)
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{
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items = searchType == null ? pi.GetCustomAttributes(false) : pi.GetCustomAttributes(searchType, true);
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}
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else if (fi != null)
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{
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items = searchType == null ? fi.GetCustomAttributes(false) : fi.GetCustomAttributes(searchType, true);
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}
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else
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{
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items = searchType == null ? t.GetCustomAttributes(false) : t.GetCustomAttributes(searchType, true);
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}
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attrCache.Add(key, items);
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return items;
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}
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catch (Exception err)
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{
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Log.Write(err, LogType.Error);
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}
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return null;
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}
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}
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internal static T GetAttr<T>(PropertyInfo pi, FieldInfo fi)
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{
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Type type = typeof(T);
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object[] attr = null;
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if (pi != null)
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{
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attr = GetAttributes(pi, type);
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}
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else
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{
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attr = GetAttributes(fi, type);
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}
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if (attr != null && attr.Length == 1)
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{
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return (T)attr[0];
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}
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return default(T);
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}
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/// <summary>
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/// 判断是否存在指定的属性
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/// </summary>
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/// <param name="searchType"></param>
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/// <param name="pi"></param>
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/// <returns></returns>
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internal static bool ExistsAttr(Type searchType, PropertyInfo pi, FieldInfo fi)
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{
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string key = (pi != null ? pi.DeclaringType.FullName + pi.Name : fi.DeclaringType.FullName + fi.Name) + searchType.Name;
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int code = key.GetHashCode();
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if (attrExistsCache.ContainsKey(code))
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{
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return attrExistsCache[code];
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}
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object[] items = pi != null ? pi.GetCustomAttributes(searchType, true) : fi.GetCustomAttributes(searchType, true);
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if (items != null && items.Length > 0)
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{
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attrExistsCache.Add(code, true);
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return true;
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}
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attrExistsCache.Add(code, false);
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return false;
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}
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/// <summary>
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/// 获取系统类型，若是Nullable类型，则转为基础类型。
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/// </summary>
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public static SysType GetSystemType(ref Type t)
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{
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if (t.IsEnum)
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{
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return SysType.Enum;
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}
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if (t.FullName.EndsWith("[]"))
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{
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return SysType.Array;
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}
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if (t.FullName.StartsWith("System.") || t.Name.StartsWith("MDictionary") || t.Name.StartsWith("MList")) // 系统类型
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{
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if (t.IsGenericType)
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{
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if (t.Name.StartsWith("Nullable"))//int? id
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{
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t = Nullable.GetUnderlyingType(t);
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return SysType.Base;
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}
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return SysType.Generic;
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}
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else if (t.FullName.StartsWith("System.Collections."))
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{
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return SysType.Collection;
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}
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else if (t.Name.EndsWith("[]"))
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{
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return SysType.Array;
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}
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if (t.FullName.Split('.').Length > 2)
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{
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return SysType.Custom;
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}
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return SysType.Base;
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}
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else
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{
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return SysType.Custom;
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}
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}
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}
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}
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