public Expression CreateMapExpression(ExpressionRequest request,
Expression instanceParameter, Internal.IDictionary<ExpressionRequest, int> typePairCount)
{
var typeMap = ConfigurationProvider.ResolveTypeMap(request.SourceType,
request.DestinationType);
if (typeMap == null)
{
const string MessageFormat = "Missing map from {0} to {1}. Create using Mapper.CreateMap<{0}, {1}>.";
var message = string.Format(MessageFormat, request.SourceType.Name, request.DestinationType.Name);
throw new InvalidOperationException(message);
}
var bindings = CreateMemberBindings(request, typeMap, instanceParameter, typePairCount);
var parameterReplacer = new ParameterReplacementVisitor(instanceParameter);
var visitor = new NewFinderVisitor();
var constructorExpression = typeMap.DestinationConstructorExpression(instanceParameter);
visitor.Visit(parameterReplacer.Visit(constructorExpression));
var expression = Expression.MemberInit(
visitor.NewExpression,
bindings.ToArray()
);
return expression;
}
public LambdaExpression CreateMapExpression(ExpressionRequest request, Internal.IDictionary<ExpressionRequest, int> typePairCount)
{
// this is the input parameter of this expression with name <variableName>
var instanceParameter = Expression.Parameter(request.SourceType, "dto");
var total = CreateMapExpression(request, instanceParameter, typePairCount);
var delegateType = typeof(Func<,>).MakeGenericType(request.SourceType, request.DestinationType);
return Expression.Lambda(delegateType, total, instanceParameter);
}
