I would like to marshall Java objects into XML and vice-versa from within an Unsigned Applet and I can’t change any of the security permission/policy files, or sign the application.
I seem to get a Security exception, because JAXB is attempting to access fields or constructors that it can’t in the applet sandbox.
The browser is running JRE 1.6.0_17
I’m also open to solutions based on some other XML (or JSON) library but have tried the following and pretty much run into a similar problem;
– XStream
– Gson
Given (something like) the following object:
@XmlType
@XmlRootElement
public class SimpleObject {
public String sampleText;
public SimpleObject() {
}
public String getSampleText() {
return sampleText;
}
public void setSampleText(String sampleText) {
this.sampleText = sampleText;
}
}
And the following simple JAXB code:
public void actionPerformed(ActionEvent e) {
try {
JAXBContext jc = JAXBContext.newInstance(SimpleObject.class);
Marshaller marshaller = jc.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
SimpleObject object = new SimpleObject();
object.setSampleText("Hello");
marshaller.marshal(object, System.out);
}
catch (JAXBException e1) {
throw new RuntimeException(e1);
}
}
I get the following exception:
Exception in thread "AWT-EventQueue-2" java.security.AccessControlException: access denied (java.lang.RuntimePermission accessDeclaredMembers)
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.checkMemberAccess(Unknown Source)
at java.lang.Class.checkMemberAccess(Unknown Source)
at java.lang.Class.getDeclaredConstructor(Unknown Source)
at com.sun.xml.internal.bind.v2.model.nav.ReflectionNavigator.hasDefaultConstructor(Unknown Source)
at com.sun.xml.internal.bind.v2.model.nav.ReflectionNavigator.hasDefaultConstructor(Unknown Source)
at com.sun.xml.internal.bind.v2.model.impl.ClassInfoImpl.<init>(Unknown Source)
at com.sun.xml.internal.bind.v2.model.impl.RuntimeClassInfoImpl.<init>(Unknown Source)
at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.createClassInfo(Unknown Source)
at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.createClassInfo(Unknown Source)
at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getClassInfo(Unknown Source)
at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(Unknown Source)
at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(Unknown Source)
at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getClassInfo(Unknown Source)
at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(Unknown Source)
at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(Unknown Source)
at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getTypeInfo(Unknown Source)
at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getTypeInfo(Unknown Source)
at com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl.getTypeInfoSet(Unknown Source)
at com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl.<init>(Unknown Source)
at com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl$JAXBContextBuilder.build(Unknown Source)
at com.sun.xml.internal.bind.v2.ContextFactory.createContext(Unknown Source)
at com.sun.xml.internal.bind.v2.ContextFactory.createContext(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at javax.xml.bind.ContextFinder.newInstance(Unknown Source)
at javax.xml.bind.ContextFinder.find(Unknown Source)
at javax.xml.bind.JAXBContext.newInstance(Unknown Source)
at javax.xml.bind.JAXBContext.newInstance(Unknown Source)
at nz.co.zeal.maker.application.actions.build.JAXBTestAction.actionPerformed(JAXBTestAction.java:24)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.AbstractButton.doClick(Unknown Source)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
I never did quite figure this one out. What I did instead was to grab a fairly simple JSON library called Flexjson. It also threw a similar security exception but the library was simple enough that I was able to switch-off the library code that causes the exception in an Applet with a boolean flag.