Regular expressions

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1

Hi everybody,

Can we create a regular expression pattern dynamically using a pipeline variable and use it in branch statement.

thanks and regards

2

I am not very sure what you want but try using Branch statement with Evaluate Labels set to True.

Give an example of your problem, it will be easier to respond

3

Thanx for the prompt response Sreedhar.

The following is the requirement.

I get a CODE like “i12345” as input variable.
This code has to be compared to see if the first letter matches a certain predefined character. This character is stored in db and has to be retrieved at run time.

To check the condition, I thought of using a regular expression whose pattern can be generated from the value retrieved from db ( say code)

My regular expression should look something like this

%variable%==/^%code%*/

But this option was not successfull and I ended up using services under pub.String folder to achieve the requirement.

I would just like to know, if the regular expression patterns can be created dynamically using pipeline variables.

thanks and best regards

4

Hi

Did u find the solution to this?

You could branch on “code” set the evaluate labels to false and add sequence steps or map steps to match the first characters.

BRANCH on “/code”(Evaluate Labels = false)

--    /[/^i/]/MAP(Starts with i)

--     Default Map - Do nothing

Regards
Krishna

5

Hi Krishna,

I had wrongly phrased the previous reply.

The variable will have the value i12345
The CODE will have a single character like i (this value is dynamic and retrieved from db)

We need to write a regular expression like:

%variable%=/^%code%*/

I tried this option, but it doesnt seem to work.

6

In this case did you set Evaluate Labels = true?? because you are trying regular expression and variable substituion syntax at the same time.

HTH,
RMG

7

You can always evaluate the regular expression first, using PSUtilities.regex:matches or a similar java service, and branch on the outcome of that test.

Tim

8

Tim,

I tried out your solution and it worked. Thanks a lot.

RMG,

I am working on your solution and will let you know the result of the same. Thanks for the support extended.

regards,
nshvr