/*
 * Copyright 2012, 2013 Red Hat, Inc.
 *
 * This file is part of Thermostat.
 *
 * Thermostat is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 2, or (at your
 * option) any later version.
 *
 * Thermostat is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Thermostat; see the file COPYING.  If not see
 * <http://www.gnu.org/licenses/>.
 *
 * Linking this code with other modules is making a combined work
 * based on this code.  Thus, the terms and conditions of the GNU
 * General Public License cover the whole combination.
 *
 * As a special exception, the copyright holders of this code give
 * you permission to link this code with independent modules to
 * produce an executable, regardless of the license terms of these
 * independent modules, and to copy and distribute the resulting
 * executable under terms of your choice, provided that you also
 * meet, for each linked independent module, the terms and conditions
 * of the license of that module.  An independent module is a module
 * which is not derived from or based on this code.  If you modify
 * this code, you may extend this exception to your version of the
 * library, but you are not obligated to do so.  If you do not wish
 * to do so, delete this exception statement from your version.
 */

package com.redhat.thermostat.utils.keyring;

import com.redhat.thermostat.shared.config.NativeLibraryResolver;

class GnomeKeyringLibraryNative implements Keyring {
    
    static {
        String lib = NativeLibraryResolver.getAbsoluteLibraryPath("GnomeKeyringWrapper");
        System.load(lib);
    }
    
    public GnomeKeyringLibraryNative() {
        // nothing
    }

    @Override
    public synchronized void loadPassword(Credentials credentials) {
        if (credentials == null) {
            throw new NullPointerException("credentials can't be null");
        }
        if (credentials.getUserName() == null) {
            throw new NullPointerException("username can't be null");
        }
        String password = gnomeKeyringWrapperGetPasswordNative(credentials.getUserName());
        credentials.setPassword(password);
    }
    
    @Override
    public synchronized boolean savePassword(Credentials credentials) {
        
        if (credentials == null) {
            throw new NullPointerException("credentials can't be null");
        }
        if (credentials.getUserName() == null) {
            throw new NullPointerException("username can't be null");
        }
        
        String password = credentials.getPassword();
        if (password == null) {
            password = "";
        }
        
        String description = credentials.getDescription();
        if (description == null) {
             description = ""; 
        }
        
        return gnomeKeyringWrapperSetPasswordNative(credentials.getUserName(), password, description);
    }
    
    private static native boolean gnomeKeyringWrapperSetPasswordNative(String userName, String password, String description);
    private static native String gnomeKeyringWrapperGetPasswordNative(String userName);
}