knowledgeowner.java

Mandarax是一个规则引擎的纯Java实现。它支持多类型的事实和基于反映的规则

/*
 * Copyright (C) 1999-2004 <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</a>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package org.mandarax.kernel;

/**
 * Interface for object owning knowledge (represented as clause sets). The interface
 * defines methods to retrieve this knowledge.
 * @author <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</A>
 * @version 3.4 <7 March 05>
 * @since 1.1
 */
public interface KnowledgeOwner extends java.io.Serializable {

	/**
	 * Iterate over all clauses.
	 * @return a clause iterator
	 * @throws ClauseSetException
	 */
	org.mandarax.util.ClauseIterator clauses() throws ClauseSetException;

	/**
	 * Get an iterator for clauses. The clause passed represents a query
	 * which can be used to restrict the clause set. E.g., if the clause
	 * iterator is built from database objects, and some of the variables
	 * in the query clause are already replaced by constants, these constants
	 * might be used to form a <code>WHERE</code> clause restricting the set of database objects
	 * used to establish the clauses. The additional parameter provides a general
	 * purpose interface to pass additional information, e.g. to sort the clause
	 * set.
	 * @return a clause iterator
	 * @param query the query clause
	 * @param additionalParameter an optional additional parameter
	 * @throws ClauseSetException
	 */
	org.mandarax.util.ClauseIterator clauses(Clause query, Object additionalParameter)
		throws ClauseSetException;
}