transportbase.java

可以实现UDDI

/*
 * The source code contained herein is licensed under the IBM Public License
 * Version 1.0, which has been approved by the Open Source Initiative.
 * Copyright (C) 2001, International Business Machines Corporation
 * All Rights Reserved.
 *
 */

package org.uddi4j.transport;

import java.net.URL;
import java.util.Properties;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.uddi4j.UDDIElement;
import org.uddi4j.client.UDDIProxy;
import org.w3c.dom.Element;

/**
 * Partial implementation of Transport interface.
 * This class provides a default implementation of the
 * send UDDIElement method. This converts the UDDIElement
 * to a DOM element and invokes the send DOM Element
 * method.
 * In the future, if the data representation is not
 * DOM based, transports will need to implement their
 * own send UDDIElement methods.
 * 
 * @author David Melgar ([e-mail])
 */
abstract public class TransportBase implements Transport {

    private Properties config;    
    
	/**
	 * Sends a UDDIElement to URL.
	 *
	 * @param el     UDDIElement to send
	 * @param url    Destination URL
	 * @return An element representing a XML DOM tree containing the UDDI response.
	 * @exception TransportException
	 *                   Thrown if a problem occurs during transmission
	 */
	public Element send(UDDIElement el, URL url) throws TransportException {
		Element base = null;
		try {
			DocumentBuilder docBuilder =
				DocumentBuilderFactory.newInstance().newDocumentBuilder();
			base = docBuilder.newDocument().createElement("tmp");
		} catch (Exception e) {
			e.printStackTrace();
		}

		el.saveToXML(base);
		return send((Element) base.getFirstChild(), url);
	}
	

	public boolean logEnabled() {
		return Boolean.valueOf(config.getProperty(UDDIProxy.LOGGING_PROPERTY)).booleanValue();
	}
	
	//package access so only set by the TransportFactory
	//This is so the configs are always in synch -
	//don't want a user modifying them independently. 
	void setConfiguration(Properties config)
	{
	    this.config = config;
	}
	
	//only subclasses need to be able to read the config.
	protected Properties getConfiguration()
	{
	    return config;
	}
}