Can I use PDFBox to set a document to modify=false without requiring a password -

i want create pdf can modify equal false , readonly = true without needing password, i.e. can read document , no 1 can modify it. seems policy object forces password , see no method use accesspermission object without policy object. below code tried.

        pddocument documenttoprotect= pddocument.load(document);         accesspermission ap = new accesspermission();         ap.setcanmodify(false);         ap.setreadonly();         standardprotectionpolicy policy = new standardprotectionpolicy(null,null, ap);         documenttoprotect.protect(policy); 

do this:

standardprotectionpolicy policy = new standardprotectionpolicy("secret", "", ap); 

this way pdf can opened empty password viewed. user password opening restricted rights, owner password permissions (which want prevent).