package pt.ist.fenixframework;

import dml.DomainModel;

import pt.ist.fenixframework.pstm.MetadataManager;
import pt.ist.fenixframework.pstm.PersistentRoot;
import pt.ist.fenixframework.pstm.Transaction;
import pt.ist.fenixframework.pstm.repository.RepositoryBootstrap;


/**
 * This class provides a method to initialize the entire Fenix
 * Framework.  To do it, programmers should call the static
 * <code>initialize(Config)</code> method with a proper instance of
 * the <code>Config</code> class.
 *
 * After initialization, it is possible to get an instance of the
 * <code>DomainModel</code> class representing the structure of the
 * application's domain.
 *
 * @see Config
 * @see dml.DomainModel
 */
public class FenixFramework {

    private static final Object INIT_LOCK = new Object();
    private static boolean initialized = false;

    private static Config config;

    public static void initialize(Config config) {
        synchronized (INIT_LOCK) {
            if (initialized) {
                throw new Error("Fenix framework already initialized");
            }

            FenixFramework.config = ((config != null) ? config : new Config());
            config.checkConfig();
            MetadataManager.init(config);
	    new RepositoryBootstrap(config).updateDataRepositoryStructureIfNeeded();
            PersistentRoot.initRootIfNeeded(config);
            initialized = true;
        }
    }

    public static Config getConfig() {
        return config;
    }

    public static DomainModel getDomainModel() {
        return MetadataManager.getDomainModel();
    }

    public static <T extends DomainObject> T getRoot() {
        return (T)PersistentRoot.getInstance().getRoot();
    }
}