public void upgrade()

in src/main/java/org/apache/cayenne/modeler/preferences/UpgradeCayennePreference.java [55:104]
40 lines of code
8 McCabe index (conditional complexity)

    public void upgrade() {
        try {

            if (!Preferences.userRoot().nodeExists(CAYENNE_PREFERENCES_PATH)) {

                File prefsFile = new File(preferencesDirectory(), PREFERENCES_NAME_OLD);
                if (prefsFile.exists()) {
                    ExtendedProperties ep = new ExtendedProperties();
                    try {
                        ep.load(new FileInputStream(prefsFile));

                        Preferences prefEditor = Preferences.userRoot().node(
                                CAYENNE_PREFERENCES_PATH).node(EDITOR);

                        prefEditor.putBoolean(
                                ModelerPreferences.EDITOR_LOGFILE_ENABLED,
                                ep.getBoolean(EDITOR_LOGFILE_ENABLED_OLD));
                        prefEditor.put(ModelerPreferences.EDITOR_LOGFILE, ep
                                .getString(EDITOR_LOGFILE_OLD));

                        Preferences frefLastProjFiles = prefEditor.node(LAST_PROJ_FILES);

                        Vector arr = ep.getVector(LAST_PROJ_FILES_OLD);

                        while (arr.size() > ModelerPreferences.LAST_PROJ_FILES_SIZE) {
                            arr.remove(arr.size() - 1);
                        }

                        frefLastProjFiles.clear();
                        int size = arr.size();

                        for (int i = 0; i < size; i++) {
                            frefLastProjFiles.put(String.valueOf(i), arr
                                    .get(i)
                                    .toString());
                        }
                    }
                    catch (FileNotFoundException e) {
                        LOGGER.error("", e);
                    }
                    catch (IOException e) {
                        LOGGER.error("", e);
                    }
                }
            }
        }
        catch (BackingStoreException e) {
            // do nothing
        }
    }