Is there a way to filter based on a project type?

[kalyanasundaram s]

Sorry if this is a novice question. I can't find a way around. 

While using the Jenkins remote api, is there a project type which i can use to filter? I wanted to take the jobs from all free style projects and ignore the Folders. How do I do this?

I see there is a _class attribute, can I rely on it for the type? But I don't see this in the older version of the Jenkins server (like 1.61.xx) only in the 2.x versions I see this attribute. I looked at some of the models "hudson.model.job" and AbstractProject. I didn't find any attribute which defines the type. Just wondering how to get the project type. Are you aware of any other attribute which defines the project type?

Thanks,

 Kalyan