In my project presently going on but in middle small work that is annotating the images,pdf files,documents etc and one thing is project requirements is RestfulService,hibernate,AngularJS.But i don't know how to apply the image and pdf annotations plese tell me the any API's
I'm not sure I understand your question. Are you asking how to print pdf's and images? From what operating system? Are you looking for annotation software or API's?