How to read & set default value for system field in jira application by using groovy script

[Peruma Chinnasamy]

I am working in first time in groovy scripting in jira application.

I would like to know  which class and which method used to read the system field and which method is used to set the default value .

Example:- 

for custom filed will get the method for reading custom field  by using below given method

 "ComponentAccessor.getCustomFieldManager().getCustomFieldObject(custom_filed_id)"

Kindly share the input to me 

[Craig Nodwell]

Hi @Peruma Chinnasamy welcome to groovy.

getFieldManager and getCustomFieldManager are both methods in the ComponentAccessor class
Here's a link to the api docs.
ComponentAccessor 

• getFieldManager

  public static FieldManager getFieldManager()

  FieldManager-- getField 

[Peruma Chinnasamy]

Hi craig

Thank you so much for your input.

I need to know one more thing which class and which method is used for setting the default value for system dropdown filed.

Eg: If project is xyz and issue type is story then I need to auto populate the value as "dropdown- value " for components field.

I don't know which class and which method we need to use to auto populate the value

Thanks and Regards 

peruma.C