abstractfunction.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.lib;


import org.mandarax.kernel.Function;

/**
 * Abstract super class mandarax lib functions.
 * @author <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</A>
 * @version 3.4 <7 March 05>
 * @since 1.6
 */
public abstract class AbstractFunction extends LibObject implements Function {

    /**
     * Indicates whether the object (usually a term or a clause set) can be performed
     * using the java semantics. All Mandarax lib functions support this.
     * @return true
     */
    public boolean isExecutable() {
        return true;
    }

    /**
     * Convert the object to a string.
     * @return a string
     */
    public String toString() {
        return(getName () == null)
              ? super.toString ()
              : getName ();
    }
}