public class DatabaseConnectorModule extends ServletModule {

	@Override
	protected void configureServlets() {
		// need a context for jndi to use.
	  bind(Context.class).to(InitialContext.class);

	  // actual jndi name is "jdbc/exist".
		bind(Database.class).toProvider(JndiIntegration.fromJndi(Database.class, "java:/comp/env/jdbc/exist")).asEagerSingleton();
		serve("/*").with(DatabaseConnectorImpl.class);
  }
}


@Singleton
public class DatabaseConnectorImpl extends HttpServlet {

	private final Database database;

	@Inject
	public DatabaseConnectorImpl(Database database) {
		this.database = database;
		try {
			DatabaseManager.registerDatabase(database);
		} catch (XMLDBException e) {
			System.err.println("Error in DatabaseConnectorImpl: " + e.getMessage());
			e.printStackTrace();
		}
	}

	/**
	 * Dole out the collections here. Anyone calling this class should already be validated because the class extracts the database username and password as a property.
	 * <br> This is a convenience class because
	 * @throws XMLDBException
	 *           if username, password, or something else is incorrect.
	 */
	public Collection getCollection(String URI) throws XMLDBException {
		if(this.database == null){
			System.err.println("Error in DatabaseConnectorImpl: database is null");
			throw new NullPointerException("database is null in DatabaseConnectorImpl.getCollection");
		}
		String username = database.getProperty("username");
		String password = database.getProperty("password");
		return DatabaseManager.getCollection(URI, username, password);
	}
}