Handling Context Changes

[Former Member]

Hi,

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[Former Member]

Hi,

[https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/2171] [original link is broken] [original link is broken] [original link is broken];

[https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/2792] [original link is broken] [original link is broken] [original link is broken];

Thanks,

Kiran.

[Former Member]

Hey,

these are the node functions that handles context.

1. remove context:

You use removeContexts () to delete all the top contexts for an element. This removes all top hierarchy levels, so that all elements of the target queue are assigned to a root element of the source queue.

Advanced user-defined functions can import either just one context into the input arrays, or complete queues. Make your selection by selecting or deselecting the Save Entire Queue in Cache checkbox in the function editor.

2. split by value:

The SplitByValue() function is the counterpart to removeContexts(): Instead of deleting a context, you can insert a context change in the source value queue. You then receive this element for each inserted context change instead of a top node element. However, for this to be possible, the top node source field must be assigned a top node target field and minOccurs must be >0. You can insert a context change in the queue after each value, after each change to the value, or after each tag without a value.

3. collapse context:

Using collapseContexts() puts the first values of all contexts into a context. Empty contexts are replaced with an empty string:

This can be useful if an upper-level node is to be created each time a lower-level node exists, for example. The function is useful in combination with the SplitByValue function.

Example:

removeContext:

We use remove context to remove the context of a queue

A ->removeContext-> A

B B

C C

here each line under an alphabet denotes context change.

One thing about context change is it will not show you null values coming in input.

A ->removeContext-> A

C

C

in above example -- represents only context change no value in this place(null).

Collapscontext :

It works very much same way of removecontext but it also considers null values and gives [] for null values (if Context of Field is on its Preceeding parent otherwice it will work as remove context)

A ->CollapsContext-> A

[] (Blank value)

C C

One more chane is if there are multiple values in a context then it will only select first value from that queue

A ->CollapsContext-> A

D B

B C

C

As you can see in above example A & D falls under one context hence D is Removed

Split ByValue :

Used to Chnage the Context of Input

it has three options in it

1)each value

2)value change

3)emptyValue

The link given by Rohit is Self Explanatry for this .

FormateByExample :

it changes the Context of input1 as per the Context of Second input but the number of values in both the input must be same .

eg.

Input1 Input2 ->FormateByExample-> Out

A P A

B Q B

C R C

ou can also refer to this blog.

Message context change.

reward points if useful.

regards,

Milan

[Former Member]

Hi,

Context Changes you need to do to get all the nodes of all occerences.

EX:

SOURCE

<GS> -

---

0-unbound

<ST> -

---

1-unbound

<name/> 0-1

</ST>

</GS>

Here if you set context to name if you duplicate st node it wont take all the names in 2 occurences it will take only first occurence name.

If you set Context to ST it will the all the names in all the occurences of ST segments.

It is the main concept of Context Change.

Reward points if neeedful.

Thanks,

RamuV

[Former Member]

Hi,

Context Handling

Context handling you use when you want to group elements in different node from source into the single node of target with multiple occrance of element( remove context) and if you want to do rever of it the use function split by value .

For more details refer following blog

Refer

SAP Network Blog: Introduction to Context Handling in Message Mapping

/people/riyaz.sayyad/blog/2006/04/23/introduction-to-context-handling-in-message-mapping

/people/sravya.talanki2/blog/2005/12/08/message-mapping-simplified-150-part-ii

SAP Exchange Infrastructure: Mapping Patterns - Understand Context Handling in Message Mapping - Webinar Powerpoint

https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/f59730fa-0901-0010-df97-c12f071f...

Thanks

swarup