in your service impl you have not used a generic version of hashmap.
try the below code
public HashMap<String, String> getPropertiesMap()
throws InvalidSessionException {
change from *HashMap m = new HashMap(); to HashMap<String,String>
m = new HashMap<String,String>();
* m.put("XXX", "xxxx");
return m;
}
Thanks
Sudeep
On Mon, Oct 26, 2009 at 11:38 PM, Palani <pas...@gmail.com> wrote:
>
>
> Thanks for the reply.
> (1) Yes, I am using generics.
>
> (2) I am putting only String in the map
>
> Below is how the code looks like
>
>
>
> // method that gets the data from the server
> public void getPropertiesMap {
> AsyncCallback<HashMap<String, String>> callback =
> new
> AsyncCallback<HashMap<String, String>>() {
> public void onSuccess(HashMap<String,
> String> result) {
>
> }
> public void onFailure(Throwable caught) {
> System.out.println(caught);
>
> }
>
> };
> service.getPropertiesMap(callback);
> }
>
>
> // Method declartion in the service ( I tried without the
> @gwt.typeArgs declaration also).
>
> /**
> * @gwt.typeArgs <HashMap<String, String>>
> */
> HashMap<String, String> getPropertiesMap() throws
> InvalidSessionException;
>
>
> //Method declaration in ServiceAsync
> void getPropertiesMap(AsyncCallback<HashMap<String, String>>
> callback);
>
>
>
>
> // Service Impl method
>
> public HashMap<String, String> getPropertiesMap()
> throws InvalidSessionException {
> *HashMap m = new HashMap();
> * m.put("XXX", "xxxx");
> return m;
> }
>
>
>
>
> On Oct 26, 12:49 pm, Sudeep S <sudee...@gmail.com> wrote:
> > 2 quick questions.
> >
> > 1. are u using generics.
> > 2. have all the objects of your hashmap implemented isSeriliazable or
> > Serilizable interface.
> >
> > On Mon, Oct 26, 2009 at 10:51 AM, Palani <pas...@gmail.com> wrote:
> >
> > > Hello,
> > > I am in the process of converting from gwt 1.5 to 1.7.1 and
> > > getting the following error
> > > when I am trying to get a HashMap from the server.
> >
> > > Any idea why this might happen?
> > > I am using JDK 1.6.0_13.
> >
> > > The request looks like
> >
> > > 5|0|4|http://localhost:54002/Webclient/webclient/|<http://localhost:54002/Webclient/webclient/%7C>
> > > E2C9084EB9E82F1F373FDB40DF5D423D|<
> http://localhost:54002/Webclient/webclient/%7CE2C9084EB9E82F1F373FDB4...>
> > > com.client.web.client.WebClientService|getPropertiesMapNew|1|2|3|4|0|
> >
> > > method Return Type shows as class java.util.HashMap
> >
> > > typeSignature is java.util.HashMap/962170901
> >
> > > customSerializar is class
> > >
> com.google.gwt.user.client.rpc.core.java.util.HashMap_CustomFieldSerializer
> >
> > > args is [[1,["java.util.HashMap/962170901"],0,5], {XXX=xxxx}] looks
> > > like in Method.invoke
> >
> > > public static void
> >
> > >
> com.google.gwt.user.client.rpc.core.java.util.HashMap_CustomFieldSerializer.serialize
> >
> > >
> (com.google.gwt.user.client.rpc.SerializationStreamWriter,java.util.HashMap)
> > > throws com.google.gwt.user.client.rpc.SerializationException
> >
> > > =========================================================
> > > Exception while dispatching incoming RPC call
> > > com.google.gwt.user.client.rpc.SerializationException:
> > > java.lang.IllegalArgumentException: argument type mismatch
> > > at
> >
> > >
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeWithCustomSerializer
> > > (ServerSerializationStreamWriter.java:690)
> > > at
> >
> > >
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl
> > > (ServerSerializationStreamWriter.java:659)
> > > at
> >
> > >
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize
> > > (ServerSerializationStreamWriter.java:593)
> > > at
> >
> > >
> com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject
> > > (AbstractSerializationStreamWriter.java:129)
> > > at
> > > com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter
> > > $ValueWriter$8.write(ServerSerializationStreamWriter.java:146)
> > > at
> >
> > >
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue
> > > (ServerSerializationStreamWriter.java:530)
> > > at
> >
> > >
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeClass
> > > (ServerSerializationStreamWriter.java:636)
> > > at
> >
> > >
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl
> > > (ServerSerializationStreamWriter.java:666)
> > > at
> >
> > >
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize
> > > (ServerSerializationStreamWriter.java:593)
> > > at
> >
> > >
> com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject
> > > (AbstractSerializationStreamWriter.java:129)
> > > at
> > > com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter
> > > $ValueWriter$8.write(ServerSerializationStreamWriter.java:146)
> > > at
> >
> > >
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue
> > > (ServerSerializationStreamWriter.java:530)
> > > at
> com.google.gwt.user.server.rpc.RPC.encodeResponse(RPC.java:573)
> > > at com.google.gwt.user.server.rpc.RPC.encodeResponseForSuccess
> > > (RPC.java:441)
> > > at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse
> > > (RPC.java:529)
> > > at
> com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall
> > > (RemoteServiceServlet.java:166)
> > > at com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost
> > > (RemoteServiceServlet.java:86)
> > > at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
> > > at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> > > at
> > > org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
> > > 487)
> > > at org.mortbay.jetty.servlet.ServletHandler.handle
> > > (ServletHandler.java:362)
> > > at org.mortbay.jetty.security.SecurityHandler.handle
> > > (SecurityHandler.java:216)
> > > at org.mortbay.jetty.servlet.SessionHandler.handle
> > > (SessionHandler.java:181)
> > > at org.mortbay.jetty.handler.ContextHandler.handle
> > > (ContextHandler.java:729)
> > > at
> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
> > > 405)
> > > at org.mortbay.jetty.handler.ContextHandlerCollection.handle
> > > (ContextHandlerCollection.java:206)
> > > at org.mortbay.jetty.handler.HandlerWrapper.handle
> > > (HandlerWrapper.java:152)
> > > at org.mortbay.jetty.Server.handle(Server.java:324)
> > > at
> > > org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
> > > 505)
> > > at org.mortbay.jetty.HttpConnection$RequestHandler.content
> > > (HttpConnection.java:843)
> > > at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
> > > at
> org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
> > > at
> org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
> > > at org.mortbay.io.nio.SelectChannelEndPoint.run
> > > (SelectChannelEndPoint.java:395)
> > > at org.mortbay.thread.BoundedThreadPool$PoolThread.run
> > > (BoundedThreadPool.java:450)
> > > Caused by: java.lang.IllegalArgumentException: argument type mismatch
> > > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> > > at sun.reflect.NativeMethodAccessorImpl.invoke
> > > (NativeMethodAccessorImpl.java:39)
> > > at sun.reflect.DelegatingMethodAccessorImpl.invoke
> > > (DelegatingMethodAccessorImpl.java:25)
> > > at java.lang.reflect.Method.invoke(Method.java:597)
> > > at
> >
> > >
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeWithCustomSerializer
> > > (ServerSerializationStreamWriter.java:678)
> >
>
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