for (int i = 0; i < jardescs.size(); i++)
{
IFile jardesc = (IFile) jardescs.get(i);
JarPackageData jarPackage = new JarPackageData();
IJarDescriptionReader reader = jarPackage.createJarDescriptionReader(jardesc.getContents());
reader.read(jarPackage);
jarPackage.setSaveManifest(false);
jarPackage.setSaveDescription(false);
jarPackage.setOverwrite(true);
jarPackage.setBuildIfNeeded(false);
IPath path = jarPackage.getJarLocation();