How to create a FOR loop in BizTalk mapper

pedramr — Wed, 27 Dec 2006 16:25:00 GMT

In order to achieve this, we will be using the Iteration functoid. The Iteration functoid outputs the index of the current record in a looping structure.

The XSLT generated by the BizTalk mapper, processes elements with possible multiple instances using a loop. In other words, an order book with unbounded number of orders would usually force the mapper to loop through each of the Orders.

In order to create a FOR loop we require the ability to get the index of the current record as part of the iteration and that is where we use the iteration functoid. We then need to define a condition for our FOR loop (such as where index>10). This can be done using logical functoids such as the greater than functoid.

for (int index = 0; index < 10; index++)

{

// get the order

Order order = orders[index];

// now apply operation

// todo

}

This can be represented using the following map:

In the above map, the logical less than functoid checks to ensure that the record index returned by the iteration functoid is less than 10.

BizTalk's Cumulative Functoids and their Scope

pedramr — Wed, 27 Dec 2006 15:06:00 GMT

Biztalk’s powerful mapper tool, allows the reduction of multiple values into a single value. For instance it allows the user to sum up the values of all orders. However what if we are only interested in summing up the value of all the orders in the scope of their parent order book? Well in that case, we can specify a second input parameter to the cumulative functoid which defines the scope of the operation.

The values for the scoping parameter are:

Value	Description
0	This forces the operation over the entire document instance
1	This applies the operation in the scope of the first parameter’s parent
2	Same as 1 but in the scope of the value’s grandparent
3 or greater	You can guess the rest! (Tip: great-grandparent, great-great-grandparent, etc.)

In the example below, I have a cumulative sum functoid which calculates the total quantity of items for order books.

Notice the second constant parameter to the cumulative sum functoid specifying the scope of the operation.

Pedram Rezaei's Ramblings : BizTalk

How to create a FOR loop in BizTalk mapper

BizTalk's Cumulative Functoids and their Scope