My Yaml file is downloaded from S3 and the end of file looks like

Resource: 
                  - !Join [ "", ["arn:aws:iam::", !Ref "AWS::AccountId", ":role/Abc*"] ]
                  - !Join [ "", ["arn:aws:iam::", !Ref "AWS::AccountId", ":role/abc*"] ]

When i try to process it in Java using :

Yaml yaml = new Yaml();
template = yaml.load(templateContent);

SnakeYaml ( the parser I am using ) gives the error : org.yaml.snakeyaml.constructor.ConstructorException: Can't construct a java object for !Join; exception=Invalid tag: !Join in 'string', line 106, column 21 : - !Join [ "", ["arn:aws:iam::", !R ...

I know this is because !Join and !Ref are cloudFormation intrinsic functions and snakeYaml doesn't recognise these

Is there a workaround for this? What alternative methods could I use to do this successfully?