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using System;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using System.Reflection.Emit;
using System.Text;
using OpenSim.ScriptEngine.Shared;
namespace OpenSim.ScriptEngine.Components.DotNetEngine.Scheduler
{
public class BaseClassFactory
{
public static void MakeBaseClass(ScriptStructure script)
{
string asmName = "ScriptAssemblies";
string ModuleID = asmName;
string ClassID = "Script";
string moveToDir = "ScriptEngines";
string asmFileName = ModuleID + "_" + ClassID + ".dll";
if (!Directory.Exists(moveToDir))
Directory.CreateDirectory(moveToDir);
ILGenerator ilgen;
AssemblyBuilder asmBuilder = AppDomain.CurrentDomain.DefineDynamicAssembly(
new AssemblyName(asmName), AssemblyBuilderAccess.RunAndSave);
// The module builder
ModuleBuilder modBuilder = asmBuilder.DefineDynamicModule(ModuleID, asmFileName);
// The class builder
TypeBuilder classBuilder = modBuilder.DefineType(ClassID, TypeAttributes.Class | TypeAttributes.Public);
// The default constructor
ConstructorBuilder ctorBuilder = classBuilder.DefineDefaultConstructor(MethodAttributes.Public);
Type[] paramsTypeArray = new Type[] {typeof (System.ParamArrayAttribute)};
Type[] executeFunctionTypeArray = new Type[] {typeof (string), typeof (System.ParamArrayAttribute)};
foreach (IScriptCommandProvider cp in script.RegionInfo.CommandProviders.Values)
{
Type t = cp.GetType();
foreach (MethodInfo mi in t.GetMethods())
{
MethodBuilder methodBuilder = classBuilder.DefineMethod(mi.Name, mi.Attributes, mi.GetType(), Type.EmptyTypes);
methodBuilder.SetParameters(paramsTypeArray);
//ParameterBuilder paramBuilder = methodBuilder.DefineParameter(1, ParameterAttributes.None, "args");
ilgen = methodBuilder.GetILGenerator();
//ilgen.Emit(OpCodes.Nop);
//ilgen.Emit(OpCodes.Ldarg_0);
//ilgen.Emit(OpCodes.Ldc_I4_0);
//ilgen.Emit(OpCodes.Ldelem_Ref);
//ilgen.MarkSequencePoint(doc, 6, 1, 6, 100);
MethodInfo ExecuteFunction = typeof(ScriptAssemblies.IScript).GetMethod(
"ExecuteFunction",
executeFunctionTypeArray);
ilgen.DeclareLocal(typeof(string));
ilgen.Emit(OpCodes.Nop);
ilgen.Emit(OpCodes.Ldstr, mi.Name);
ilgen.Emit(OpCodes.Stloc_0);
ilgen.Emit(OpCodes.Ldarg_0);
ilgen.Emit(OpCodes.Ldloc_0);
ilgen.Emit(OpCodes.Ldarg_1);
// FieldInfo testInfo = classBuilder.
//BindingFlags.NonPublic | BindingFlags.Instance);
//ilgen.Emit(OpCodes.Ldfld, testInfo);
//ilgen.EmitCall(OpCodes.Call, ExecuteFunction, executeFunctionTypeArray);
ilgen.EmitCall(OpCodes.Call, typeof(System.Console).GetMethod("WriteLine"), executeFunctionTypeArray);
// // string.Format("Hello, {0} World!", toWhom)
// //
// ilgen.Emit(OpCodes.Ldstr, "Hello, {0} World!");
// ilgen.Emit(OpCodes.Ldarg_1);
// ilgen.Emit(OpCodes.Call, typeof(string).GetMethod
//("Format", new Type[] { typeof(string), typeof(object) }));
// // Console.WriteLine("Hello, World!");
// //
// ilgen.Emit(OpCodes.Call, typeof(Console).GetMethod
// ("WriteLine", new Type[] { typeof(string) }));
ilgen.Emit(OpCodes.Ret);
//Label eom = ilgen.DefineLabel();
//ilgen.Emit(OpCodes.Br_S, eom);
//ilgen.MarkLabel(eom);
//ilgen.Emit(OpCodes.Ret);
//Type test = methodBuilder.SetParameters();
//methodBuilder.SetParameters(typeof (object[]));
}
}
//// Two fields: m_firstname, m_lastname
//FieldBuilder fBuilderFirstName = classBuilder.DefineField("m_firstname", typeof(string), FieldAttributes.Private);
//FieldBuilder fBuilderLastName = classBuilder.DefineField("m_lastname", typeof(string), FieldAttributes.Private);
//// Two properties for this object: FirstName, LastName
//PropertyBuilder pBuilderFirstName = classBuilder.DefineProperty("FirstName", System.Reflection.PropertyAttributes.HasDefault, typeof(string), null);
//PropertyBuilder pBuilderLastName = classBuilder.DefineProperty("LastName", System.Reflection.PropertyAttributes.HasDefault, typeof(string), null);
//// Custom attributes for get, set accessors
//MethodAttributes getSetAttr = MethodAttributes.Public | MethodAttributes.HideBySig | MethodAttributes.SpecialName;
//// get,set accessors for FirstName
//MethodBuilder mGetFirstNameBuilder = classBuilder.DefineMethod("get_FirstName", getSetAttr, typeof(string), Type.EmptyTypes);
//// Code generation
//ilgen = mGetFirstNameBuilder.GetILGenerator();
//ilgen.Emit(OpCodes.Ldarg_0);
//ilgen.Emit(OpCodes.Ldfld, fBuilderFirstName); // returning the firstname field
//ilgen.Emit(OpCodes.Ret);
//MethodBuilder mSetFirstNameBuilder = classBuilder.DefineMethod("set_FirstName", getSetAttr, null, new Type[] { typeof(string) });
//// Code generation
//ilgen = mSetFirstNameBuilder.GetILGenerator();
//ilgen.Emit(OpCodes.Ldarg_0);
//ilgen.Emit(OpCodes.Ldarg_1);
//ilgen.Emit(OpCodes.Stfld, fBuilderFirstName); // setting the firstname field from the first argument (1)
//ilgen.Emit(OpCodes.Ret);
//// get,set accessors for LastName
//MethodBuilder mGetLastNameBuilder = classBuilder.DefineMethod("get_LastName", getSetAttr, typeof(string), Type.EmptyTypes);
//// Code generation
//ilgen = mGetLastNameBuilder.GetILGenerator();
//ilgen.Emit(OpCodes.Ldarg_0);
//ilgen.Emit(OpCodes.Ldfld, fBuilderLastName); // returning the firstname field
//ilgen.Emit(OpCodes.Ret);
//MethodBuilder mSetLastNameBuilder = classBuilder.DefineMethod("set_LastName", getSetAttr, null, new Type[] { typeof(string) });
//// Code generation
//ilgen = mSetLastNameBuilder.GetILGenerator();
//ilgen.Emit(OpCodes.Ldarg_0);
//ilgen.Emit(OpCodes.Ldarg_1);
//ilgen.Emit(OpCodes.Stfld, fBuilderLastName); // setting the firstname field from the first argument (1)
//ilgen.Emit(OpCodes.Ret);
//// Assigning get/set accessors
//pBuilderFirstName.SetGetMethod(mGetFirstNameBuilder);
//pBuilderFirstName.SetSetMethod(mSetFirstNameBuilder);
//pBuilderLastName.SetGetMethod(mGetLastNameBuilder);
//pBuilderLastName.SetSetMethod(mSetLastNameBuilder);
//// Now, a custom method named GetFullName that concatenates FirstName and LastName properties
//MethodBuilder mGetFullNameBuilder = classBuilder.DefineMethod("GetFullName", MethodAttributes.Public, typeof(string), Type.EmptyTypes);
//// Code generation
//ilgen = mGetFullNameBuilder.GetILGenerator();
//ilgen.Emit(OpCodes.Ldarg_0);
//ilgen.Emit(OpCodes.Call, mGetFirstNameBuilder); // getting the firstname
//ilgen.Emit(OpCodes.Ldstr, " "); // an space
//ilgen.Emit(OpCodes.Ldarg_0);
//ilgen.Emit(OpCodes.Call, mGetLastNameBuilder); // getting the lastname
//// We need the 'Concat' method from string type
//MethodInfo concatMethod = typeof(String).GetMethod("Concat", new Type[] { typeof(string), typeof(string), typeof(string) });
//ilgen.Emit(OpCodes.Call, concatMethod); // calling concat and returning the result
//ilgen.Emit(OpCodes.Ret);
//// Another constructor that initializes firstname and lastname
//ConstructorBuilder ctorBuilder2 = classBuilder.DefineConstructor(MethodAttributes.Public, CallingConventions.Standard, new Type[] { typeof(string), typeof(string) });
//ctorBuilder2.DefineParameter(1, ParameterAttributes.In, "firstname");
//ctorBuilder2.DefineParameter(2, ParameterAttributes.In, "lastname");
//// Code generation
//ilgen = ctorBuilder2.GetILGenerator();
//// First of all, we need to call the base constructor,
//// the Object's constructor in this sample
//Type objType = Type.GetType("System.Object");
//ConstructorInfo objCtor = objType.GetConstructor(Type.EmptyTypes);
//ilgen.Emit(OpCodes.Ldarg_0);
//ilgen.Emit(OpCodes.Call, objCtor); // calling the Object's constructor
//ilgen.Emit(OpCodes.Ldarg_0);
//ilgen.Emit(OpCodes.Ldarg_1);
//ilgen.Emit(OpCodes.Call, mSetFirstNameBuilder); // setting the firstname field from the first argument (1)
//ilgen.Emit(OpCodes.Ldarg_0);
//ilgen.Emit(OpCodes.Ldarg_2);
//ilgen.Emit(OpCodes.Call, mSetLastNameBuilder); // setting the lastname field from the second argument (2)
//ilgen.Emit(OpCodes.Ret);
// Finally, create the type and save the assembly
classBuilder.CreateType();
asmBuilder.Save(asmFileName);
string toFile = Path.Combine(moveToDir, asmFileName);
if (File.Exists(toFile))
File.Delete(toFile);
File.Move(asmFileName, toFile);
string a = "";
}
}
}
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