Discussions

Web tier: servlets, JSP, Web frameworks: XML to Java Beans in an Applet

Bookmark and Share Get thread feed

  1. XML to Java Beans in an Applet (1 messages)

    • Posted by: null
    • Posted on: January 27 2005 10:44 EST
    I'm trying to develop an applet that reads in some XML output from an HTTP request and tries to deserialize the xml stream to Java objects. There are a few open-source projects that help you in Serializing Java to XML and Deserializing XML to Java. I have used XStream on the server side in the past and it works great but unfortunately this framework does not in an <APPLET> framework because in an applet you cannot construct a "custom" classloader. So I end up getting the following exception:
        java.security.AccessControlException: access denied (java.lang.RuntimePermission createClassLoader)
    at java.security.AccessControlContext.checkPermission(Unknown Source)
    at java.security.AccessController.checkPermission(Unknown Source)
    at java.lang.SecurityManager.checkPermission(Unknown Source)
    at java.lang.SecurityManager.checkCreateClassLoader(Unknown Source)
    at java.lang.ClassLoader.<init>(Unknown Source)
    at com.thoughtworks.xstream.core.util.CompositeClassLoader.<init>(CompositeClassLoader.java:39)
    at com.thoughtworks.xstream.core.DefaultClassMapper.<init>(DefaultClassMapper.java:28)
    at com.thoughtworks.xstream.XStream.<init>(XStream.java:144)
    at com.avedatech.tree.util.TreeNodeConverter.convertTreeNodeFromXML(TreeNodeConverter.java:35)
    at com.avedatech.tree.TreePanel.getRootNode(TreePanel.java:104)
    at com.avedatech.tree.TreePanel.<init>(TreePanel.java:40)
    at com.avedatech.tree.ViewTree.start(ViewTree.java:113)
    at sun.applet.AppletPanel.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
    -----------------------

    Does anyone know of a open source product that does not use the "Class-Loading" methodology to deserialize and XML stream to Java beans?

    Thanks

    Venkatt Guhesan
    Aveda Technology
    Reply to this

    Threaded Messages (1)

  2. Solved[ Go to top ]

    I have a solution to the problem. I'm using Castor and it seems to not use a classloader.

    Hope this tidbit helps someone using XML<->Java serializing and deserializing in an Applet Environment.

    Cheers

    Venkatt Guhesan
    Aveda Technology
    Reply to this Reply to original