ruleset.java

轻量级Http代理服务器

/*
 * jRevProxy, an opensource Java reverse proxy server
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
  
 * This program 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 General Public License for more details.
  
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
 *
 * $Id: Ruleset.java,v 2.4 2003/03/27 15:53:53 fnoe Exp $ 
 */

package cx.noe.jrevproxy;

/**
 * Ruleset 
 *
 * Holds a set of reverse proxy rules
 * @author  <a href="mailto:[e-mail]">Frederik Noe</a>
 * @version <tt>$Revision: 2.4 $</tt>
 */

import java.util.Vector;
import java.util.Enumeration;

public class Ruleset {
    
    private Vector rules = null;
    /** Creates a new instance of RuleSet */
    public Ruleset() {
        rules = new Vector();
    }
    
    public void addRule(Rule rule) {
        // check if the rule has not yet been added
        if(isNewRule(rule))
            rules.add(rule);
    }
    
    private boolean isNewRule(Rule r) {
        // walk over the list of rules and find out if it is a new rule
        Enumeration enum = rules.elements();
        Rule rule = null;
        
        while(enum.hasMoreElements()) {
            rule = (Rule) enum.nextElement();
            if(rule.getName().equals(r.getName()))
                return false;
        }
        return true;
    }
    
    public String toString() {
        String newline = System.getProperty( "line.separator" );
        StringBuffer buf = new StringBuffer();
        
        buf.append( "--Rules--" ).append( newline );
        for( int i=0; i<rules.size(); i++ ){
            buf.append( rules.elementAt(i) ).append( newline );
        }
        
        return buf.toString();
    }
    
    /**
     *
     */
    public Rule getApplicableRule(String virtualdir) {
        Enumeration enum = rules.elements();
        Rule rule = null;
        
        while(enum.hasMoreElements()) {
            rule = (Rule) enum.nextElement();
            
            if(rule.isApplicable(virtualdir))
                return rule;
        }
        
        return null;
    }
}