public Action <string, TItem> Generate()
{
var expressions = new List <Expression>();
Expression ownerExpression = _itemParam;
while (_propertyInfos.Count > 1)
{
var property = _propertyInfos.Pop();
var propertyExpression = Expression.Property(ownerExpression, property);
var ifNullCreate = Expression.IfThen(Expression.Equal(propertyExpression, Expression.Constant(null, property.PropertyType)),
Expression.Assign(propertyExpression,
Expression.New(property.PropertyType)));
expressions.Add(ifNullCreate);
ownerExpression = propertyExpression;
}
var actualProperty = _propertyInfos.Pop();
var actualPropertyExpression = Expression.Property(ownerExpression, actualProperty);
var assignExpression = Expression.Assign(actualPropertyExpression,
ConverterExpression.Create(actualProperty.PropertyType, _stringParam));
expressions.Add(assignExpression);
var block = Expression.Block(expressions);
return(Expression.Lambda <Action <string, TItem> >(block, _stringParam, _itemParam).Compile());
}
public Action <string, TItem> Generate()
{
return(Compile(Expression.Invoke(_assignmentLambda, _itemParam, ConverterExpression.Create(_assignmentLambda.Parameters[1].Type, _stringParam))));
}