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}