• Avalanche
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    • Avalanche.Localization
      • Introduction
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      • Microsoft.Extensions
        • Introduction
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        • AspNetCore
      • Pluralization
        • Introduction
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      • Introduction
      • IMessage
      • IMessageProvider
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      • Introduction
      • HResult
        • Introduction
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    • Avalanche.Template
      • Introduction
      • TemplateFormats
      • ITemplatePrintable
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      • ITemplateFormats
      • Extract Arguments
      • Emplacement
    • Avalanche.Tokenizer
      • Introduction
      • IToken
      • ITokenizer
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    • Avalanche.Service
      • Introduction
      • Service
        • IService
        • Construction
        • Query
        • CancellationToken
        • CachePolicy
        • Cast
        • Scope
        • Dispose
      • Handler
        • Introduction
        • IHandler
        • Cancel
        • Recursion
        • Cyclicity
        • Delegates
        • Casting
        • Invokable
        • Handlers
      • Request
        • Introduction
        • IRequest
        • [Request]
        • [ContextParameter]
        • Print Tree
      • Dependency Injection
        • Introduction
        • ServiceRequest<T>
        • Handler
        • CachePolicy
        • CancellationToken
        • QueryLogger
      • Examples
        • Expression Example
        • Mapper Example
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    • Avalanche.Writer
      • Introduction
      • Writer
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      • WriterPipe
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      • Context
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    • Avalanche.Accessor
      • Introduction
      • AccessorServices
      • List
        • ListAccessor
        • ListConstructor
        • ListDeconstructor
        • ListDefaultConstructor
        • ListGet
        • ListSet
        • ListAdd
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        • ListClear
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        • MapSet
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      • Record
        • RecordAccessor
        • RecordConstructor
        • RecordDeconstructor
        • RecordDefaultConstructor
      • Field
        • FieldAccessor
        • FieldReader
        • FieldWriter
        • FieldReferer
      • Dependency Injection
        • Introduction
      • AccessorMessages
    • Avalanche.Emit
      • Introduction
      • TypeBuilder
      • ConstructorBuilder
      • MethodBuilder
      • PropertyBuilder
      • FieldBuilder
      • Emit
      • Utilities
    • Avalanche.DataType
      • Introduction
      • IDataTypeBase
      • IDataType
      • IRecordType
      • IFieldType
      • IUnionType
      • IListType
      • IMapType
      • IValueType
      • IEnumerationType
      • IIntegerType
      • IRealType
      • IStringType
      • IAnyType
      • DataTypeRequest
      • PrintTree
      • DataTypeMessages
    • Avalanche.FileSystem
      • Introduction
      • Abstractions
        • IFileSystem
          • IFileSystemBrowse
          • IFileSystemCreateDirectory
          • IFileSystemDelete
          • IFileSystemFileAttribute
          • IFileSystemMount
          • IFileSystemMove
          • IFileSystemObserve
          • IFileSystemOpen
        • IEvent
        • IEntry
        • IOption
        • IToken
      • FileSystem
      • VirtualFileSystem
      • MemoryFileSystem
      • EmbeddedFileSystem
      • HttpFileSystem
      • Decoration
      • IFileProvider
      • Events
      • Utilities
        • Dispose
        • File Scanner
        • Visit Tree
        • File Operation
    • Avalanche.Identity
      • Introduction
      • Identity
      • IdentityParts
      • IdentityInterner
      • IdentityComparer
      • Print Tree
      • IdentityAccessors
        • Introduction
        • TypeName
    • Avalanche.Utilities
      • Introduction
      • Collections
        • Tuples
        • StructList
        • ArrayList
        • BijectionMap
        • LocakableDictionary
        • LockableList
        • MapList
        • Pipe
        • RingQueue
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        • ArrayUtilities
      • Comparers
        • IGraphComparer
        • IGraphComparable
        • AlphaNumericComparer
        • EnumerableComparer
        • EnumerableGraphComparer
        • ReferenceComparer
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        • RecordComparer
      • Cloners
        • ICloner
        • IGraphCloner
        • IGraphCloneable
        • EnumerableCloner
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      • Dispose
        • IDisposeAttachable
        • IDisposeBelatable
      • Provider
        • Introduction
        • ProviderBase
        • Delegate
        • Concatenation
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        • AsReadOnly
        • AsService
      • Record
        • IRecordDescription
        • IFieldDescription
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        • RecordDelegates
          • RecordCreate
          • RecordClone
          • RecordCopy
          • IRecordDelegates
        • FieldDelegates
          • FieldRead
          • FieldWrite
          • RecreateWith
          • IFieldDelegates
      • String
        • IEscaper
        • UnicodeString
      • Miscellaneous
        • IIdGenerator
        • Permutation
        • IReadOnly
        • IUserDataContainer
        • Void
    • Avalanche.Core
      • License
      • Order

    PropertyBuilder

    PropertyBuilderRequest is a request to create PropertyBuilder.

    // Create service
    IService service = Services.Create((ServiceHandlers.Instance, EmitHandlers.Instance), CachePolicies.Default);
    // 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",
        Attributes: PropertyAttributes.None,
        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",
        Attributes: MethodAttributes.SpecialName | MethodAttributes.HideBySig | MethodAttributes.Public,
        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",
        Attributes: MethodAttributes.SpecialName | MethodAttributes.HideBySig | MethodAttributes.Public,
        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 Avalanche.Emit;
    using Avalanche.Service;
    
    public class propertybuilder
    {
        public static void Run()
        {
            {
                // <1>
                // Create service
                IService service = Services.Create((ServiceHandlers.Instance, EmitHandlers.Instance), CachePolicies.Default);
                // 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",
                    Attributes: PropertyAttributes.None,
                    PropertyType: typeof(int),
                    ParameterTypes: null);
                // </1>
                // <2>
                // 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);
                // </2>
                {
                    // <3>
                    // Create set method
                    IRequestFor<MethodBuilder> setter = new MethodBuilderRequest(
                        Name: "set_MyProperty",
                        Attributes: MethodAttributes.SpecialName | MethodAttributes.HideBySig | MethodAttributes.Public,
                        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));
                    // </3>
                }
                {
                    // <4>
                    // Create get method
                    IRequestFor<MethodBuilder> getter = new MethodBuilderRequest(
                        Name: "get_MyProperty",
                        Attributes: MethodAttributes.SpecialName | MethodAttributes.HideBySig | MethodAttributes.Public,
                        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));
                    // </4>
                }
                // <5>
                // Add property to type request
                typeBuilder = typeBuilder.Append(property);
                // </5>
                // <6>
                // 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)!;
                // </6>
                // Print 
                Console.WriteLine(newRequest.PrintTree());
            }
        }
    }
    
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