domrulesetunmarshaller.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: DOMRulesetUnmarshaller.java,v 2.5 2003/03/27 15:53:57 fnoe Exp $ 
 */

package cx.noe.jrevproxy;

import cx.noe.jrevproxy.Ruleset;

import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

/**
 * DOMRulesetUnmarshaller
 * 
 * @author  <a href="mailto:[e-mail]">Frederik Noe</a>
 * @version <tt>$Revision: 2.5 $</tt>
 */
public class DOMRulesetUnmarshaller {
        
    public Ruleset unmarshallRuleset(Node rootNode) throws Exception{
        Ruleset rset = new Ruleset();
        
        Node n;
        NodeList nodes = rootNode.getChildNodes();
        
        for(int i=0 ; i<nodes.getLength(); i++) {
            n = nodes.item( i );
            
            if(n.getNodeType() == Node.ELEMENT_NODE) {
                
                if( n.getNodeName().equals("rule"))
                    rset.addRule(unmarshallRule(n));
                else {
                    // unexpected element in Ruleset
                }
            }
            else {
                // unexpected node-type in Ruleset
            }
        }
        return rset;
    }
    
    private Rule unmarshallRule(Node node) throws Exception{
        Rule rule = new Rule();
        
        Node n;
        NodeList nodes = node.getChildNodes();
        
        for( int i=0 ; i<nodes.getLength(); i++ ) {
            n = nodes.item( i );
            
            if( n.getNodeType() == Node.ELEMENT_NODE ) {
                
                if( n.getNodeName().equals("name")) {
                    rule.setName( unmarshallText(n));
                }
                else if(n.getNodeName().equals("virtualdir")) {
                    rule.setVirtualDir(unmarshallText(n));
                }
                else if (n.getNodeName().equals("junction")){
                    rule.setJunction((unmarshallText(n)));
                }
                else if (n.getNodeName().equals("users")) {
                    rule = unmarshallUsers(n,rule);
                }
            }else {
                // unexpected node-type in Rule
            }
        }
        return rule;
    }
    
    private Rule unmarshallUsers(Node node, Rule rule) {
        
        Node n;
        NodeList nodes = node.getChildNodes();
        
        for( int i=0 ; i<nodes.getLength(); i++ ) {
            n = nodes.item( i );
            
            if( n.getNodeType() == Node.ELEMENT_NODE ) {
                
                if( n.getNodeName().equals("subjectdn")) {
                    rule.addUser(unmarshallText(n));
                }
                else  {
                    // unexpected node-type in Users
                }
            }
            else {
                // unexpected node-type in Users
            }
        }
        
        return rule;
    }
    
    private String unmarshallText( Node textNode ) {
        StringBuffer buf = new StringBuffer();
        
        Node n;
        NodeList nodes = textNode.getChildNodes();
        
        for( int i=0; i<nodes.getLength(); i++ ){
            n = nodes.item( i );
            
            if( n.getNodeType() == Node.TEXT_NODE ) {
                buf.append( n.getNodeValue() );
            }else{
                // expected a text-only node!
            }
        }
        return buf.toString().trim();
    }
    
    private String unmarshallAttribute( Node node, String name, String defaultValue ) {
        Node n = node.getAttributes().getNamedItem( name );
        return (n!=null)?(n.getNodeValue()):(defaultValue);
    }
    
}