PropertyBuilder
PropertyBuilderRequest is a request to create PropertyBuilder.
// Create service
IService service = Services.Create(Avalanche.Emit.Module.Instance);
// Request to create type builder
IRequestFor<TypeBuilder> typeBuilder = new TypeBuilderRequest("MyClassWithProperty", TypeAttributes.Public | TypeAttributes.Class | TypeAttributes.AutoClass);
// Initialize property request
IRequestFor<PropertyBuilder> property = new PropertyBuilderRequest(
name: "MyProperty",
propertyAttributes: PropertyAttributes.None,
attributes: new object[] { new DataMemberAttribute { Order = 2 } },
propertyType: typeof(int),
parameterTypes: null);
In this example we create a backing field.
// Request to create backing field
IRequestFor<FieldBuilder> field = new FieldBuilderRequest("MyField", typeof(int), FieldAttributes.Public);
// Add backing field to type request
typeBuilder = typeBuilder.Append(field);
PropertyBuilderSetSetter is a request to attach a setter method to property.
// Create set method
IRequestFor<MethodBuilder> setter = new MethodBuilderRequest(
name: "set_MyProperty",
methodAttributes: MethodAttributes.SpecialName | MethodAttributes.HideBySig | MethodAttributes.Public,
attributes: null,
returnType: null,
parameterTypes: typeof(int));
// Create op codes
IRequestFor<ILGenerator> il = ILGeneratorRequest.Default
.Append(OpCodes.Ldarg_0)
.Append(OpCodes.Ldarg_1)
.Append(OpCodes.Stfld, field)
.Append(OpCodes.Ret);
// Add opcodes to method request
setter = setter.Append(il);
// Add setter request to type
typeBuilder.Append(setter);
// Assign setter to property
property = property.Append(new PropertyBuilderSetSetter(setter));
And PropertyBuilderSetGetter is a request to attach a getter method.
// Create get method
IRequestFor<MethodBuilder> getter = new MethodBuilderRequest(
name: "get_MyProperty",
methodAttributes: MethodAttributes.SpecialName | MethodAttributes.HideBySig | MethodAttributes.Public,
attributes: null,
returnType: typeof(int));
// Create op codes
IRequestFor<ILGenerator> il = ILGeneratorRequest.Default
.Append(OpCodes.Ldarg_0)
.Append(OpCodes.Ldfld, field)
.Append(OpCodes.Ret);
// Add opcodes to method request
getter = getter.Append(il);
// Add getter request to type
typeBuilder.Append(getter);
// Assign setter to property
property = property.Append(new PropertyBuilderSetGetter(getter));
Once property request is complete, add it to type request.
// Add property to type request
typeBuilder = typeBuilder.Append(property);
Request an instance and try it.
// Request to build type
IRequestFor<Type> type = new TypeRequest(typeBuilder);
// Request to create new instance
IRequestFor<Object> newRequest = type.NewRequest();
// Print
Console.WriteLine(newRequest.PrintTree());
// Get instance
object instance = service.GetRequired<IRequestFor<object>, object>(newRequest);
// Get property with reflection
PropertyInfo pi = instance.GetType().GetProperty("MyProperty")!;
// Write with reflection
pi.SetValue(instance, 9);
// Read with reflection
int value = (int)pi.GetValue(instance)!;
View complete request
NewRequest
└── Type = TypeRequest
└── Key = ContextRequest
├── Key = "System.Reflection.Emit.TypeBuilder"
├── Value = TypeBuilderRequest
│ ├── Name = "MyClassWithProperty"
│ └── Attributes = AutoLayout, AnsiClass, Class, Public, AutoClass
├── Requests[0] = FieldBuilderRequest
│ ├── Name = "MyField"
│ ├── Attributes = Public
│ └── FieldType = System.Int32
└── Requests[1] = ContextRequest
├── Key = "System.Reflection.Emit.PropertyBuilder"
├── Value = PropertyBuilderRequest
│ ├── Name = "MyProperty"
│ ├── Attributes = None
│ └── PropertyType = System.Int32
├── Requests[0] = PropertyBuilderSetSetter
│ └── Setter = ContextRequest
│ ├── Key = "System.Reflection.Emit.Builder"
│ ├── Value = MethodBuilderRequest
│ │ ├── Name = "set_MyProperty"
│ │ ├── Attributes = PrivateScope, Public, HideBySig, SpecialName
│ │ └── ParameterTypes[0] = System.Int32
│ └── Requests[0] = ContextRequest
│ ├── Key = "System.Reflection.Emit.ILGenerator"
│ ├── Value = ILGeneratorRequest
│ ├── Requests[0] = Emit
│ │ └── Opcode = ldarg.0
│ ├── Requests[1] = Emit
│ │ └── Opcode = ldarg.1
│ ├── Requests[2] = Emit
│ │ ├── Opcode = stfld
│ │ └── Parameters[0] = FieldBuilderRequest
│ └── Requests[3] = Emit
│ └── Opcode = ret
└── Requests[1] = PropertyBuilderSetGetter
└── Getter = ContextRequest
├── Key = "System.Reflection.Emit.Builder"
├── Value = MethodBuilderRequest
│ ├── Name = "get_MyProperty"
│ ├── Attributes = PrivateScope, Public, HideBySig, SpecialName
│ └── ReturnType = System.Int32
└── Requests[0] = ContextRequest
├── Key = "System.Reflection.Emit.ILGenerator"
├── Value = ILGeneratorRequest
├── Requests[0] = Emit
│ └── Opcode = ldarg.0
├── Requests[1] = Emit
│ ├── Opcode = ldfld
│ └── Parameters[0] = FieldBuilderRequest
└── Requests[2] = Emit
└── Opcode = ret
Full Example
Full example
using System;
using System.Reflection;
using System.Reflection.Emit;
using System.Runtime.Serialization;
using Avalanche.Emit;
using Avalanche.Service;
public class propertybuilder
{
public static void Run()
{
{
// <01>
// Create service
IService service = Services.Create(Avalanche.Emit.Module.Instance);
// Request to create type builder
IRequestFor<TypeBuilder> typeBuilder = new TypeBuilderRequest("MyClassWithProperty", TypeAttributes.Public | TypeAttributes.Class | TypeAttributes.AutoClass);
// Initialize property request
IRequestFor<PropertyBuilder> property = new PropertyBuilderRequest(
name: "MyProperty",
propertyAttributes: PropertyAttributes.None,
attributes: new object[] { new DataMemberAttribute { Order = 2 } },
propertyType: typeof(int),
parameterTypes: null);
// </01>
// <02>
// Request to create backing field
IRequestFor<FieldBuilder> field = new FieldBuilderRequest("MyField", typeof(int), FieldAttributes.Public);
// Add backing field to type request
typeBuilder = typeBuilder.Append(field);
// </02>
{
// <03>
// Create set method
IRequestFor<MethodBuilder> setter = new MethodBuilderRequest(
name: "set_MyProperty",
methodAttributes: MethodAttributes.SpecialName | MethodAttributes.HideBySig | MethodAttributes.Public,
attributes: null,
returnType: null,
parameterTypes: typeof(int));
// Create op codes
IRequestFor<ILGenerator> il = ILGeneratorRequest.Default
.Append(OpCodes.Ldarg_0)
.Append(OpCodes.Ldarg_1)
.Append(OpCodes.Stfld, field)
.Append(OpCodes.Ret);
// Add opcodes to method request
setter = setter.Append(il);
// Add setter request to type
typeBuilder.Append(setter);
// Assign setter to property
property = property.Append(new PropertyBuilderSetSetter(setter));
// </03>
}
{
// <04>
// Create get method
IRequestFor<MethodBuilder> getter = new MethodBuilderRequest(
name: "get_MyProperty",
methodAttributes: MethodAttributes.SpecialName | MethodAttributes.HideBySig | MethodAttributes.Public,
attributes: null,
returnType: typeof(int));
// Create op codes
IRequestFor<ILGenerator> il = ILGeneratorRequest.Default
.Append(OpCodes.Ldarg_0)
.Append(OpCodes.Ldfld, field)
.Append(OpCodes.Ret);
// Add opcodes to method request
getter = getter.Append(il);
// Add getter request to type
typeBuilder.Append(getter);
// Assign setter to property
property = property.Append(new PropertyBuilderSetGetter(getter));
// </04>
}
// <05>
// Add property to type request
typeBuilder = typeBuilder.Append(property);
// </05>
// <06>
// Request to build type
IRequestFor<Type> type = new TypeRequest(typeBuilder);
// Request to create new instance
IRequestFor<Object> newRequest = type.NewRequest();
// Print
Console.WriteLine(newRequest.PrintTree());
// Get instance
object instance = service.GetRequired<IRequestFor<object>, object>(newRequest);
// Get property with reflection
PropertyInfo pi = instance.GetType().GetProperty("MyProperty")!;
// Write with reflection
pi.SetValue(instance, 9);
// Read with reflection
int value = (int)pi.GetValue(instance)!;
// </06>
// Print
Console.WriteLine(newRequest.PrintTree());
}
}
}