private static MethodFactory.ExpressionArgsPair GetObjectCreatorExpressions(ConstructorInfo constructor)
{
ParameterExpression args = Expression.Parameter(typeof(object[]), "args");
Expression[] callArgsExpressions = MethodFactory.GetMethodCallArgsExpressions(constructor.GetParameters(), args);
NewExpression newExpression = Expression.New(constructor, callArgsExpressions);
return(new MethodFactory.ExpressionArgsPair()
{
Expression = (Expression)newExpression,
Parameters = new ParameterExpression[1]
{
args
}
});
}
private static MethodFactory.ExpressionArgsPair GetMethodCallExpressions(MethodInfo method)
{
ParameterExpression parameterExpression = Expression.Parameter(typeof(object), "instance");
UnaryExpression unaryExpression = Expression.Convert((Expression)parameterExpression, method.DeclaringType);
ParameterExpression args = Expression.Parameter(typeof(object[]), "args");
Expression[] callArgsExpressions = MethodFactory.GetMethodCallArgsExpressions(method.GetParameters(), args);
Expression expression = (Expression)Expression.Call(method.IsStatic ? (Expression)null : (Expression)unaryExpression, method, callArgsExpressions);
if (method.ReturnType == typeof(void))
{
expression = (Expression)Expression.Block(expression, (Expression)Expression.Default(typeof(object)));
}
return(new MethodFactory.ExpressionArgsPair()
{
Expression = expression,
Parameters = new ParameterExpression[2]
{
parameterExpression,
args
}
});
}