Test.java

import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.introspect.VisibilityChecker;
import org.kohsuke.github.GHBranch;

import static com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility.ANY;
import static com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility.NONE;

public class Test {
    static final ObjectMapper om = new ObjectMapper();

    static {
        om.setVisibilityChecker(new VisibilityChecker.Std(NONE, NONE, NONE, NONE, ANY));
        om.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
    }

    public static void main(String[] args) throws Exception {
        String json = "{\"name\":\"b1\",\"commit\":{\"sha\":\"fafca8f366f5a40d9b28746262a3159dd38b98da\",\"commit\":{\"author\":{\"name\":\"Vivek Pandey\",\"email\":\"vivek.pandey@gmail.com\",\"date\":\"2017-09-07T21:18:04Z\"},\"committer\":{\"name\":\"Vivek Pandey\",\"email\":\"vivek.pandey@gmail.com\",\"date\":\"2017-09-07T21:18:04Z\"},\"message\":\"Added Jenkinsfile\",\"tree\":{\"sha\":\"4a6ecb363c01b4266bd2db5e77a60034ddaee714\",\"url\":\"https://api.github.com/repos/vivek/empty1/git/trees/4a6ecb363c01b4266bd2db5e77a60034ddaee714\"},\"url\":\"https://api.github.com/repos/vivek/empty1/git/commits/fafca8f366f5a40d9b28746262a3159dd38b98da\",\"comment_count\":0},\"url\":\"https://api.github.com/repos/vivek/empty1/commits/fafca8f366f5a40d9b28746262a3159dd38b98da\",\"html_url\":\"https://github.com/vivek/empty1/commit/fafca8f366f5a40d9b28746262a3159dd38b98da\",\"comments_url\":\"https://api.github.com/repos/vivek/empty1/commits/fafca8f366f5a40d9b28746262a3159dd38b98da/comments\",\"author\":{\"login\":\"vivek\",\"id\":38139,\"avatar_url\":\"https://avatars1.githubusercontent.com/u/38139?v=4\",\"gravatar_id\":\"\",\"url\":\"https://api.github.com/users/vivek\",\"html_url\":\"https://github.com/vivek\",\"followers_url\":\"https://api.github.com/users/vivek/followers\",\"following_url\":\"https://api.github.com/users/vivek/following{/other_user}\",\"gists_url\":\"https://api.github.com/users/vivek/gists{/gist_id}\",\"starred_url\":\"https://api.github.com/users/vivek/starred{/owner}{/repo}\",\"subscriptions_url\":\"https://api.github.com/users/vivek/subscriptions\",\"organizations_url\":\"https://api.github.com/users/vivek/orgs\",\"repos_url\":\"https://api.github.com/users/vivek/repos\",\"events_url\":\"https://api.github.com/users/vivek/events{/privacy}\",\"received_events_url\":\"https://api.github.com/users/vivek/received_events\",\"type\":\"User\",\"site_admin\":false},\"committer\":{\"login\":\"vivek\",\"id\":38139,\"avatar_url\":\"https://avatars1.githubusercontent.com/u/38139?v=4\",\"gravatar_id\":\"\",\"url\":\"https://api.github.com/users/vivek\",\"html_url\":\"https://github.com/vivek\",\"followers_url\":\"https://api.github.com/users/vivek/followers\",\"following_url\":\"https://api.github.com/users/vivek/following{/other_user}\",\"gists_url\":\"https://api.github.com/users/vivek/gists{/gist_id}\",\"starred_url\":\"https://api.github.com/users/vivek/starred{/owner}{/repo}\",\"subscriptions_url\":\"https://api.github.com/users/vivek/subscriptions\",\"organizations_url\":\"https://api.github.com/users/vivek/orgs\",\"repos_url\":\"https://api.github.com/users/vivek/repos\",\"events_url\":\"https://api.github.com/users/vivek/events{/privacy}\",\"received_events_url\":\"https://api.github.com/users/vivek/received_events\",\"type\":\"User\",\"site_admin\":false},\"parents\":[{\"sha\":\"323bf9ade63f9823a1489423b674a68d89dfdf52\",\"url\":\"https://api.github.com/repos/vivek/empty1/commits/323bf9ade63f9823a1489423b674a68d89dfdf52\",\"html_url\":\"https://github.com/vivek/empty1/commit/323bf9ade63f9823a1489423b674a68d89dfdf52\"}]},\"_links\":{\"self\":\"https://api.github.com/repos/vivek/empty1/branches/b1\",\"html\":\"https://github.com/vivek/empty1/tree/b1\"},\"protected\":false,\"protection\":{\"enabled\":false,\"required_status_checks\":{\"enforcement_level\":\"off\",\"contexts\":[]}},\"protection_url\":\"https://api.github.com/repos/vivek/empty1/branches/b1/protection\"}";
        GHBranch branch = om.readValue(json, GHBranch.class);
        System.out.println(branch.isProtected());
    }
}