Remove brackets from Service Account Owner attributes in JSON

[nvachhani]

How can brackets be removed from Service Account Owner attribute values when provisioning to AD? 

Example:

{
  "info": "Owner - ${ServiceAccountOwnerMap.get('USEROWNERS').get('26').collect{it.customproperty3.toString()}}",
  "sn": "${ServiceAccountOwnerMap.get('USEROWNERS').get('26').collect{it.lastname.toString()}}",
  "givenName": "${ServiceAccountOwnerMap.get('USEROWNERS').get('26').collect{it.firstname.toString()}}"
}

Values sent to AD look like following:

Owner  - [custprop3value]

[lastnamevalue]

[firstnamevalue]

I have tried the following:

"Owner - ${ServiceAccountOwnerMap.get('USEROWNERS').get('1').collect{it.custom property3.toString().replace("[", "").replace("]", "")}}",

"Owner - ${ServiceAccountOwnerMap.get('USEROWNERS').get('1').collect{it.custom property3.toString().replace(\"[\", \"\").replace(\"]\", \"\")}}",

"Owner - ${ServiceAccountOwnerMap.get('USEROWNERS').get('1').collect{it.custom property3.toString().replace(\\\"[\\\", \\\"\\\").replace(\\\"]\\\", \\\"\\\")}}",

These result in error: Failed to parse template script (your template may contain an error or be trying to use expressions not currently supported): startup failed: SimpleTemplateScript14.groovy: 14: unexpected char: '\' 

I have also tried single quotes around the bracket but that does not do anything and value still ends with brackets around it.

"Owner - ${ServiceAccountOwnerMap.get('USEROWNERS').get('1').collect{it.customproperty3.toString().replace('[', '').replace(']', '')}}",

[rushikeshvartak]

Sample

${entitlement_values.collect{it.toString().indexOf("(") == -1 ? it : it.toString().substring(0, it.toString().indexOf("(") -1)}.toListString().replaceAll('\\[|\\]','')}

[nvachhani]

The following still does not strip the brackets:

"info": "Owner - ${ServiceAccountOwnerMap.get('USEROWNERS').get('1').collect{it.customproperty3.toString().replaceAll('\\[|\\]','')}}",

[rushikeshvartak · Accepted solution]

"info": "Owner - ${ServiceAccountOwnerMap.get('USEROWNERS').get('1').collect{it.customproperty3}.toString().replaceAll('\\[|\\]','')}",