Gabriel Beres,
You need to complete Oracle Certified Associate,
Java SE 7 Programmer certification (OCAJ 7) before taking OCPJP 7. If you already hold any version of Oracle Certified Professional, Java Programmer OR Any version of Sun Certified Java Programmer you can attend OCPJP 7 under upgrade path.
Oracle currently have BETA exam of upgrade path only and other BETA exams will be available soon.
Oracle Certified Professional, Java SE 7 Programmer Upgrade Path Preparation Article
http://www.epractizelabs.com/blog2/?p=397
Oracle Certified Professional, Java SE 7 Programmer Preparation Article
http://www.epractizelabs.com/blog2/?p=407
Oracle Certified Associate, Java SE 7 Programmer Preparation Article
http://www.epractizelabs.com/blog2/?p=413
Just read these articles and choose your certification path.
Good luck for your preparation !!!