ExpressionDelegates.Generation 1.0.0

Usage

API is very simple:

ExpressionDelegates.Accessors.Find(string signature).Getter(object targetObject)
ExpressionDelegates.Accessors.Find(MemberInfo member).Setter(object targetObject, object value)

ExpressionDelegates.Methods.Find(string signature).Invoke(object targetObject, params object[] args)
ExpressionDelegates.Methods.Find(MethodInfo method).Invoke(object targetObject, params object[] args)

ExpressionDelegates.Constructors.Find(string signature ).Invoke(params object[] args)
ExpressionDelegates.Constructors.Find(Constructors constructor).Invoke(params object[] args)

Property/Field getter and setter delegates

Expression<Func<string, int>> expression = s => s.Length;
MemberInfo accessorInfo = ((MemberExpression)expression.Body).Member;

Accessor lengthAccessor = ExpressionDelegates.Accessors.Find(accessorInfo);
// or
lengthAccessor = ExpressionDelegates.Accessors.Find("System.String.Length");

var value = lengthAccessor.Get("17 letters string");
// value == 17

If property/field is read-only, Accessor.Set will be null.

If property is write-only, Accessor.Get will be null.

Method delegates

Expression<Func<string, char, bool>> expression = (s, c) => s.Contains(c);
MethodInfo methodInfo = ((MethodCallExpression)expression.Body).Method;

Method containsMethod = ExpressionDelegates.Methods.Find(methodInfo);
// or
containsMethod = ExpressionDelegates.Methods.Find("System.String.Contains(System.Char)");

var value = containsMethod.Invoke("Hello", 'e');
// value == true

Constructor delegates

Expression<Func<char, int, string>> expression = (c, i) => new string(c, i);
ConstructorInfo ctorInfo = ((NewExpression)expression.Body).Constructor;

Constructor stringCtor = ExpressionDelegates.Constructors.Find(ctorInfo);
// or
stringCtor = ExpressionDelegates.Constructors.Find("System.String.String(System.Char, System.Int32)");

var value = stringCtor.Invoke('c', 5);
// value == "ccccc"

Possibilities and Limitations

Parameters for the delegates, their count and type checking are up to you. InvalidCastException is thrown in case of using wrong parameters for a delegate signature. IndexOutOfRangeException is thrown for an unexpected parameter count.

• No delegates for private or protected classes and members, only for internal and public

• No delegates for methods or constructors with ref parameters

• No delegates for anonymous types (not sure if needed)

• Static members are supported

• Generics are supported

• Nested classes are supported

• Dynamic properties/fields are supported