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https://issues.apache.org/jira/browse/XMLRPC-178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12791976#action_12791976
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Gamaliel Amaudruz commented on XMLRPC-178:
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Hello,
I have a similar issue when I use the proxy method with a function defined in
the Interface as returning a String[]. I get the error even if I do no casting
on it, just invoking the method:
myProxyObject.theMethodReturningAStringArray(someParams);
raises a "java.lang.ClassCastException: [Ljava.lang.Object;" in the proxy
object.
The "fix" defined here http://ws.apache.org/xmlrpc/faq.html#arrays is not for
the proxy method. I tried many different casting options but I can't find the
correct one.
If the proxy method cannot handle functions which return Array, I think it
would be good to indicate this limitation on the website here:
http://ws.apache.org/xmlrpc/advanced.html
Or maybe I'm not getting something right...
Regards,
Gam
PS: I implemented the old way where you have to do everything by hand and it
works fine.
> ClassCastException in client proxy cannot cast Ljava.lang.Object to
> Ljava.lang.String
> -------------------------------------------------------------------------------------
>
> Key: XMLRPC-178
> URL: https://issues.apache.org/jira/browse/XMLRPC-178
> Project: XML-RPC
> Issue Type: Bug
> Components: Releases
> Affects Versions: 3.1.2
> Environment: Windows Server 2003
> Reporter: Chris Cooper
> Assignee: Jochen Wiedmann
>
> I have a fairly simple client server application. One of my exposed server
> methods returns a String[]. I am getting a ClassCastException on the client
> side when getting the result. The class cast exception occurs in
> ClientFactory.class in the newInstance function. I am stepping through the
> code, and it happens on the line "return typeConverter.convert(result);".
> Stepping into this function hasn't really helped as it causes the
> ClassCastException. I am not sure what the problem is, on the server side I
> have debugged and determined that my function is indeed returning a String[]
> as it should be, but for some reason when it comes over to the client side
> there is a problem. I can post you the stack trace:
> Exception in thread "main" java.lang.ClassCastException: [Ljava.lang.Object;
> cannot be cast to [Ljava.lang.String;
> at $Proxy1.getInstances(Unknown Source)
> at
> com.rsa.grinderbot.controller.perfmon.WindowsProxy.getInstances(WindowsProxy.java:46)
> -> this is the proxy object calling my server's function
> at
> com.rsa.grinderbot.controller.perfmon.WindowsStats.<init>(WindowsStats.java:37)
> at
> com.rsa.grinderbot.controller.perfmon.PerformanceMonitor.<init>(PerformanceMonitor.java:33)
> at com.rsa.grinderbot.controller.Controller.run(Controller.java:268)
> at com.rsa.grinderbot.controller.Controller.main(Controller.java:333)
> Here is my constructor that creates the proxy object using the client factory.
> public WindowsProxy(Server server) {
> this.server = server;
> XmlRpcClientConfigImpl config = new XmlRpcClientConfigImpl();
> try {
> config.setServerURL(new URL("http://"; +
> server.getHostname() + ":" + server.getPort() + "/xmlrpc"));
> config.setReplyTimeout(0);
> config.setConnectionTimeout(0);
> XmlRpcClient client = new XmlRpcClient();
> client.setConfig(config);
> ClientFactory factory = new ClientFactory(client);
> windows = (WindowsServerAPI)
> factory.newInstance(WindowsServerAPI.class);
> } catch (MalformedURLException e) {
> //TODO log4j
> e.printStackTrace();
> }
> }
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