state.java

drools 一个开放源码的规则引擎

package org.drools.examples.state;

/*
 * $Id: State.java,v 1.3 2004/11/26 03:23:21 dbarnett Exp $
 *
 * Copyright 2002 (C) The Werken Company. All Rights Reserved.
 *
 * Redistribution and use of this software and associated documentation
 * ("Software"), with or without modification, are permitted provided that the
 * following conditions are met:
 *
 * 1. Redistributions of source code must retain copyright statements and
 * notices. Redistributions must also contain a copy of this document.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. The name "drools" must not be used to endorse or promote products derived
 * from this Software without prior written permission of The Werken Company.
 * For written permission, please contact [e-mail].
 *
 * 4. Products derived from this Software may not be called "drools" nor may
 * "drools" appear in their names without prior written permission of The Werken
 * Company. "drools" is a registered trademark of The Werken Company.
 *
 * 5. Due credit should be given to The Werken Company.
 * (http://drools.werken.com/).
 *
 * THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE WERKEN COMPANY OR ITS CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;

public class State
{
    private String name = null;

    private String state = null;

    private PropertyChangeSupport changes = new PropertyChangeSupport( this );
    
    public State( String name )
    {
        this.name = name;
        state = "NOTRUN";
    }

    public String getName( )
    {
        return name;
    }

    public String getState( )
    {
        return state;
    }

    public void setState( String newState )
    {
        String oldState = state;
        state = newState;
        changes.firePropertyChange("state", oldState, newState);
    }

    public boolean inState(String aName, String aState)
    {
        return name.equals( aName ) && state.equals( aState );
    }

    public String toString( )
    {
        return name + "[" + state + "]";
    }
    
    public void addPropertyChangeListener( PropertyChangeListener l ) {
        changes.addPropertyChangeListener( l );
    }
    
    public void removePropertyChangeListener( PropertyChangeListener l ) {
        changes.removePropertyChangeListener( l ); 
    }
}