001    /*
002     * hammurapi-rules @mesopotamia.version@
003     * Hammurapi rules engine. 
004     * Copyright (C) 2005  Hammurapi Group
005     *
006     * This program is free software; you can redistribute it and/or
007     * modify it under the terms of the GNU Lesser General Public
008     * License as published by the Free Software Foundation; either
009     * version 2 of the License, or (at your option) any later version.
010     *
011     * This program is distributed in the hope that it will be useful,
012     * but WITHOUT ANY WARRANTY; without even the implied warranty of
013     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014     * Lesser General Public License for more details.
015     *
016     * You should have received a copy of the GNU Lesser General Public
017     * License along with this library; if not, write to the Free Software
018     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
019     *
020     * URL: http://http://www.hammurapi.biz
021     * e-Mail: support@hammurapi.biz
022     */
023    package biz.hammurapi.dispatch;
024    
025    /**
026     * Handler to invoke methods with one argument.
027     * @author Pavel Vlasov
028     * @revision $Revision$
029     */
030    public interface InvocationHandler {
031    
032            /**
033             * Invokes target method. Passes returned value(s) to result consumer.
034             * The target "method" might be invoked multiple times, e.g. in composite
035             * invocation handler scenario.
036             * @param parameter
037             * @param resultConsumer
038             * @throws Throwable
039             */
040            void invoke(Object arg, ResultConsumer resultConsumer) throws Throwable;
041                    
042            /**
043             * This method is used to build invocation network.
044             * @return Invocation parameter type. Null if parameter type is unknown.
045             */
046            Class getParameterType();
047    }