/// <summary>在指定程序集中查找指定基类的子类</summary>
/// <param name="asm">指定程序集</param>
/// <param name="baseType">基类或接口，为空时返回所有类型</param>
/// <returns></returns>
public virtual IEnumerable <Type> GetSubclasses(Assembly asm, Type baseType)
{
//if (asm == null) throw new ArgumentNullException(nameof(asm));
//if (baseType == null) throw new ArgumentNullException(nameof(baseType));
//foreach (var item in asm.GetTypes())
//{
// if (baseType != item && baseType.IsAssignableFrom(item))
// yield return item;
//}
return(AssemblyX.Create(asm).FindPlugins(baseType));
}
private static Type GetTypeInternal(String typeName, Boolean isLoadAssembly)
{
if (String.IsNullOrEmpty(typeName))
{
throw new ArgumentNullException("typeName");
}
// 基本获取
Type type = Type.GetType(typeName);
if (type != null)
{
return(type);
}
#region 处理泛型
Int32 start = typeName.IndexOf("<");
if (start > 0)
{
Int32 end = typeName.LastIndexOf(">");
// <>也不行
if (end > start + 1)
{
// GT<P1,P2,P3,P4>
String gname = typeName.Substring(0, start);
String pname = typeName.Substring(start + 1, end - start - 1);
//pname = "P1,P2<aa,bb>,P3,P4";
List <String> pnames = new List <String>();
// 只能用栈来分析泛型参数了
Int32 count = 0;
Int32 last = 0;
for (Int32 i = 0; i < pname.Length; i++)
{
Char item = pname[i];
if (item == '<')
{
count++;
}
else if (item == '>')
{
count--;
}
else if (item == ',' && count == 0)
{
pnames.Add(pname.Substring(last, i - last).Trim());
last = i + 1;
}
}
if (last <= pname.Length)
{
pnames.Add(pname.Substring(last, pname.Length - last).Trim());
}
gname += "`" + pnames.Count;
// 先找外部的，如果外部都找不到，那就没意义了
Type gt = GetType(gname, isLoadAssembly);
if (gt == null)
{
return(null);
}
List <Type> ts = new List <Type>(pnames.Count);
foreach (String item in pnames)
{
// 如果任何一个参数为空，说明这只是一个泛型定义而已
if (String.IsNullOrEmpty(item))
{
return(gt);
}
Type t = GetType(item, isLoadAssembly);
if (t == null)
{
return(null);
}
ts.Add(t);
}
return(gt.MakeGenericType(ts.ToArray()));
}
}
#endregion
#region 处理数组
start = typeName.LastIndexOf("[");
if (start > 0)
{
Int32 end = typeName.LastIndexOf("]");
if (end > start)
{
// Int32[][] String[,,]
String gname = typeName.Substring(0, start);
String pname = typeName.Substring(start + 1, end - start - 1);
// 先找外部的，如果外部都找不到，那就没意义了
Type gt = GetType(gname, isLoadAssembly);
if (gt == null)
{
return(null);
}
if (String.IsNullOrEmpty(pname))
{
return(gt.MakeArrayType());
}
//pname = ",,,";
String[] pnames = pname.Split(new Char[] { ',' });
if (pnames == null || pnames.Length < 1)
{
return(gt.MakeArrayType());
}
return(gt.MakeArrayType(pnames.Length));
}
}
#endregion
// 处理内嵌类型
// 尝试本程序集
Assembly[] asms = new[] {
Assembly.GetExecutingAssembly(),
Assembly.GetCallingAssembly(),
Assembly.GetEntryAssembly()
};
var loads = new List <Assembly>();
foreach (var asm in asms)
{
if (asm == null || loads.Contains(asm))
{
continue;
}
loads.Add(asm);
type = asm.GetType(typeName);
if (type != null)
{
return(type);
}
}
// 尝试所有程序集
foreach (var asm in AssemblyX.GetAssemblies())
{
if (loads.Contains(asm.Asm))
{
continue;
}
loads.Add(asm.Asm);
type = asm.GetType(typeName);
if (type != null)
{
return(type);
}
}
if (isLoadAssembly)
{
foreach (var asm in AssemblyX.ReflectionOnlyGetAssemblies())
{
type = asm.GetType(typeName);
if (type != null)
{
// 真实加载
var asm2 = Assembly.LoadFile(asm.Asm.Location);
var type2 = AssemblyX.Create(asm2).GetType(typeName);
if (type2 != null)
{
type = type2;
}
return(type);
}
}
}
//// 尝试系统的
//if (!typeName.Contains("."))
//{
// type = Type.GetType("System." + typeName);
// if (type != null) return type;
// type = Type.GetType("NewLife." + typeName);
// if (type != null) return type;
//}
return(null);
}
/// <summary>根据名称获取类型</summary>
/// <param name="typeName">类型名</param>
/// <param name="isLoadAssembly">是否从未加载程序集中获取类型。使用仅反射的方法检查目标类型，如果存在，则进行常规加载</param>
/// <returns></returns>
internal static Type GetType(String typeName, Boolean isLoadAssembly)
{
var type = Type.GetType(typeName);
if (type != null)
{
return(type);
}
// 尝试本程序集
var asms = new[] {
AssemblyX.Create(Assembly.GetExecutingAssembly()),
AssemblyX.Create(Assembly.GetCallingAssembly()),
AssemblyX.Create(Assembly.GetEntryAssembly())
};
var loads = new List <AssemblyX>();
foreach (var asm in asms)
{
if (asm == null || loads.Contains(asm))
{
continue;
}
loads.Add(asm);
type = asm.GetType(typeName);
if (type != null)
{
return(type);
}
}
// 尝试所有程序集
foreach (var asm in AssemblyX.GetAssemblies())
{
if (loads.Contains(asm))
{
continue;
}
loads.Add(asm);
type = asm.GetType(typeName);
if (type != null)
{
return(type);
}
}
// 尝试加载只读程序集
if (!isLoadAssembly)
{
return(null);
}
foreach (var asm in ReflectionOnlyGetAssemblies())
{
type = asm.GetType(typeName);
if (type != null)
{
// 真实加载
var file = asm.Asm.Location;
try
{
type = null;
var asm2 = Assembly.LoadFile(file);
var type2 = AssemblyX.Create(asm2).GetType(typeName);
if (type2 == null)
{
continue;
}
type = type2;
if (XTrace.Debug)
{
var root = ".".GetFullPath();
if (file.StartsWithIgnoreCase(root))
{
file = file.Substring(root.Length).TrimStart("\\");
}
XTrace.WriteLine("TypeX.GetType(\"{0}\") => {1}", typeName, file);
}
}
catch (Exception ex)
{
if (XTrace.Debug)
{
XTrace.WriteException(ex);
}
}
return(type);
}
}
return(null);
}
/// <summary>查找所有非系统程序集中的所有插件</summary>
/// <remarks>继承类所在的程序集会引用baseType所在的程序集，利用这一点可以做一定程度的性能优化。</remarks>
/// <param name="baseType"></param>
/// <param name="isLoadAssembly">是否从未加载程序集中获取类型。使用仅反射的方法检查目标类型，如果存在，则进行常规加载</param>
/// <param name="excludeGlobalTypes">指示是否应检查来自所有引用程序集的类型。如果为 false，则检查来自所有引用程序集的类型。 否则，只检查来自非全局程序集缓存 (GAC) 引用的程序集的类型。</param>
/// <returns></returns>
internal static IEnumerable <Type> FindAllPlugins(Type baseType, Boolean isLoadAssembly, Boolean excludeGlobalTypes)
{
var baseAssemblyName = baseType.Assembly.GetName().Name;
var list = new List <Type>();
foreach (var item in GetAssemblies())
{
// 如果excludeGlobalTypes为true，则指检查来自非GAC引用的程序集
if (excludeGlobalTypes && item.Asm.GlobalAssemblyCache)
{
continue;
}
// 不搜索系统程序集，不搜索未引用基类所在程序集的程序集，优化性能
if (item.IsSystemAssembly || !IsReferencedFrom(item.Asm, baseAssemblyName))
{
continue;
}
var ts = item.FindPlugins(baseType);
if (ts != null && ts.Count > 0)
{
foreach (var elm in ts)
{
if (!list.Contains(elm))
{
list.Add(elm);
yield return(elm);
}
}
}
}
if (isLoadAssembly)
{
foreach (var item in AssemblyX.ReflectionOnlyGetAssemblies())
{
// 如果excludeGlobalTypes为true，则指检查来自非GAC引用的程序集
if (excludeGlobalTypes && item.Asm.GlobalAssemblyCache)
{
continue;
}
// 不搜索系统程序集，不搜索未引用基类所在程序集的程序集，优化性能
if (item.IsSystemAssembly || !IsReferencedFrom(item.Asm, baseAssemblyName))
{
continue;
}
var ts = item.FindPlugins(baseType);
if (ts != null && ts.Count > 0)
{
// 真实加载
var asm2 = Assembly.LoadFile(item.Asm.Location);
ts = AssemblyX.Create(asm2).FindPlugins(baseType);
if (ts != null && ts.Count > 0)
{
foreach (var elm in ts)
{
if (!list.Contains(elm))
{
list.Add(elm);
yield return(elm);
}
}
}
}
}
}
}
/// <summary>在指定程序集中查找指定基类的子类</summary>
/// <param name="asm">指定程序集</param>
/// <param name="baseType">基类或接口，为空时返回所有类型</param>
/// <returns></returns>
public override IEnumerable <Type> GetSubclasses(Assembly asm, Type baseType)
{
return(AssemblyX.Create(asm).FindPlugins(baseType));
}
private static Type GetTypeInternal(String typeName, Boolean isLoadAssembly)
{
// 基本获取
var type = Type.GetType(typeName);
if (type != null)
{
return(type);
}
// 处理泛型
if (typeName[typeName.Length - 1] == '>')
{
return(GetGenericType(typeName, isLoadAssembly));
}
// 处理数组 有可能是 aa [[ dddd ]] ,也有可能是 aa[dddd]
if (typeName[typeName.Length - 1] == ']')
{
return(GetArrayType(typeName, isLoadAssembly));
}
// 处理内嵌类型
// 尝试本程序集
var asms = new[] {
AssemblyX.Create(Assembly.GetExecutingAssembly()),
AssemblyX.Create(Assembly.GetCallingAssembly()),
AssemblyX.Create(Assembly.GetEntryAssembly())
};
var loads = new List <AssemblyX>();
foreach (var asm in asms)
{
if (asm == null || loads.Contains(asm))
{
continue;
}
loads.Add(asm);
type = asm.GetType(typeName);
if (type != null)
{
return(type);
}
}
// 尝试所有程序集
foreach (var asm in AssemblyX.GetAssemblies())
{
if (loads.Contains(asm))
{
continue;
}
loads.Add(asm);
type = asm.GetType(typeName);
if (type != null)
{
return(type);
}
}
// 尝试加载只读程序集
if (isLoadAssembly)
{
foreach (var asm in AssemblyX.ReflectionOnlyGetAssemblies())
{
type = asm.GetType(typeName);
if (type != null)
{
// 真实加载
//var file = asm.Asm.CodeBase;
//if (String.IsNullOrEmpty(file))
// file = asm.Asm.Location;
//else if (file.StartsWith("file:///"))
// file = file.Substring("file:///".Length);
// ASP.Net中不会锁定原始DLL文件
var file = asm.Asm.Location;
try
{
type = null;
var asm2 = Assembly.LoadFile(file);
var type2 = AssemblyX.Create(asm2).GetType(typeName);
if (type2 == null)
{
continue;
}
type = type2;
if (XTrace.Debug)
{
XTrace.WriteLine("TypeX.GetType(\"{0}\")导致加载{1}", typeName, file);
}
}
catch (Exception ex)
{
if (XTrace.Debug)
{
XTrace.WriteException(ex);
}
}
return(type);
}
}
}
return(null);
}