89             providers = new Vector<>();
  90         }
  91         providers.add(eip);
  92     }
  93 
  94     /**
  95      * <p>
  96      * Unregister a previously installed installation provider
  97      * </p>
  98      */
  99     public synchronized static void removeExtensionInstallationProvider
 100         (ExtensionInstallationProvider eip)
 101     {
 102         providers.remove(eip);
 103     }
 104 
 105     /**
 106      * <p>
 107      * Checks the dependencies of the jar file on installed extension.
 108      * </p>
 109      * @param jarFile containing the attriutes declaring the dependencies
 110      */
 111     public static boolean checkExtensionsDependencies(JarFile jar)
 112     {
 113         if (providers == null) {
 114             // no need to bother, nobody is registered to install missing
 115             // extensions
 116             return true;
 117         }
 118 
 119         try {
 120             ExtensionDependency extDep = new ExtensionDependency();
 121             return extDep.checkExtensions(jar);
 122         } catch (ExtensionInstallationException e) {
 123             debug(e.getMessage());
 124         }
 125         return false;
 126     }
 127 
 128     /*
 129      * Check for all declared required extensions in the jar file

  89             providers = new Vector<>();
  90         }
  91         providers.add(eip);
  92     }
  93 
  94     /**
  95      * <p>
  96      * Unregister a previously installed installation provider
  97      * </p>
  98      */
  99     public synchronized static void removeExtensionInstallationProvider
 100         (ExtensionInstallationProvider eip)
 101     {
 102         providers.remove(eip);
 103     }
 104 
 105     /**
 106      * <p>
 107      * Checks the dependencies of the jar file on installed extension.
 108      * </p>
 109      * @param jar containing the attriutes declaring the dependencies
 110      */
 111     public static boolean checkExtensionsDependencies(JarFile jar)
 112     {
 113         if (providers == null) {
 114             // no need to bother, nobody is registered to install missing
 115             // extensions
 116             return true;
 117         }
 118 
 119         try {
 120             ExtensionDependency extDep = new ExtensionDependency();
 121             return extDep.checkExtensions(jar);
 122         } catch (ExtensionInstallationException e) {
 123             debug(e.getMessage());
 124         }
 125         return false;
 126     }
 127 
 128     /*
 129      * Check for all declared required extensions in the jar file