001/*
002 * HA-JDBC: High-Availability JDBC
003 * Copyright (c) 2004-2007 Paul Ferraro
004 * 
005 * This library is free software; you can redistribute it and/or modify it 
006 * under the terms of the GNU Lesser General Public License as published by the 
007 * Free Software Foundation; either version 2.1 of the License, or (at your 
008 * option) any later version.
009 * 
010 * This library is distributed in the hope that it will be useful, but WITHOUT
011 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
012 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License 
013 * for more details.
014 * 
015 * You should have received a copy of the GNU Lesser General Public License
016 * along with this library; if not, write to the Free Software Foundation, 
017 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
018 * 
019 * Contact: ferraro@users.sourceforge.net
020 */
021package net.sf.hajdbc.sql;
022
023import net.sf.hajdbc.Database;
024
025/**
026 * Represents a method invocation on a SQL object against a database.
027 * @author Paul Ferraro
028 * @param <D> Type of the root object (e.g. driver, datasource)
029 * @param <T> Target object type of the invocation
030 * @param <R> Return type of this invocation
031 */
032public interface Invoker<D, T, R>
033{
034        /**
035         * Invokes an action against the specified database on the specified SQL object
036         * @param database a database
037         * @param object an SQL object
038         * @return the invocation result
039         * @throws Exception
040         */
041        public R invoke(Database<D> database, T object) throws Exception;
042}