Advanced Customization > Business Logic Customization > Options and Variants > Customizing Options and Variants > Windchill Option Set Delegate Framework Customizations > Restrict Windchill Object to Assign Option Set
  
Restrict Windchill Object to Assign Option Set
Based on business requirements, it may be a required to restrict a specific type of object from being assigned with an option set.
In a product structure assembly there is a type of part, where due to the business rules, the system should not allow the assignment of an option set and does not allow capability to assign choices on specific type of part. You can restrict this for a business object or a subtype of a business object.
Procedure
The com.ptc.windchill.option.delegate.impl.NullOptionSetFetcherDelegate delegate is available to restrict a specific object type from being assigned with an option set. This delegate specifies the object type to restrict. This can be defined using a service property in Windchill.
These Windchill properties are defined using the Windchill XCONF feature. See the section Basic Administration for details on XCONF files and how to create them.
Example: Restrict the Option Set Assignment
Using the example there is a business requirement to restrict the option set assignment to a subtype of part viz.com.myorg.OrgPart:
1. Create an XCONF file that contains the appropriate new value for the property com.ptc.windchill.option.delegate.OptionSetFetcherDelegate.
2. Use the XCONF Manager to update Windchill services properties.
The following XML document is an XCONF command to restrict a object to assign option set:
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE Configuration SYSTEM "xconf.dtd">

<Configuration targetFile="codebase/service.properties">
   <!-- OptionSet Fetcher Delegates -->
    <Service context="default" name="com.ptc.windchill.option.delegate.OptionSetFetcherDelegate">
          <Option cardinality="duplicate" requestor="null" selector="WCTYPE|wt.part.WTPart| com.myorg.OrgPart" serviceClass="com.ptc.windchill.option.delegate.impl.NullOptionSetFetcherDelegate"/>
   </Service>

</Configuration>
3. The following command saves the changes in the file to Windchill services properties:
xconfmanager -i codebase/com/ptc/windchill/options/customization/example1.properties.xconf -p
This command causes Windchill to restrict all object of this type for assigning an option set.
* 
The above is an example to illustrate the steps. The appropriate object type musts be defined and XCONF file created at the appropriate location.