Hi, Yes, IsSerializable or java.io.Serializable are compulsory
see http://code.google.com/webtoolkit/doc/1.6/FAQ_Server.html#Does_the_GWT_RPC_system_support_the_use_of_java.io.Serializable regards didier On Nov 2, 12:36 pm, jayalakshmi jahagirdar <jayalakshmi.jahagir...@gmail.com> wrote: > hello all, > Iam trying to pass a object of the class from server to client using RPC > mechanism.And the class which am using is a nested class.In which i have > properties of dashboard. > The class is not implementing Serializable interface.Is it necessary to > implement the Serializable interface? > Iam getting the following error: > > SEVERE: Exception while dispatching incoming RPC call > com.google.gwt.user.client.rpc.SerializationException: > java.lang.reflect.InvocationTargetException > at > com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeWithCustomSerializer(ServerSerializationStreamWriter.java:760) > at > com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl(ServerSerializationStreamWriter.java:723) > at > com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize(ServerSerializationStreamWriter.java:612) > at > com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject(AbstractSerializationStreamWriter.java:129) > at > com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter$ValueWriter$8.write(ServerSerializationStreamWriter.java:152) > at > com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue(ServerSerializationStreamWriter.java:534) > at com.google.gwt.user.server.rpc.RPC.encodeResponse(RPC.java:609) > at > com.google.gwt.user.server.rpc.RPC.encodeResponseForSuccess(RPC.java:467) > at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:564) > at > com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:188) > at > com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:224) > at > com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) > at > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) > at > org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) > at > org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) > at > org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) > at > org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) > at > org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) > at > org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) > at > org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) > at > org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:861) > at > org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579) > at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1584) > at java.lang.Thread.run(Thread.java:619) > Caused by: java.lang.reflect.InvocationTargetException > 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:742) > ... 25 more > Caused by: com.google.gwt.user.client.rpc.SerializationException: Type > 'com.mycompany.project.server.Dashboard' was not included in the set of > types which can be serialized by this SerializationPolicy or its Class > object could not be loaded. For security purposes, this type will not be > serialized.: instance = com.mycompany.project.server.dashbo...@10ffb38 > at > com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize(ServerSerializationStreamWriter.java:610) > at > com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject(AbstractSerializationStreamWriter.java:129) > at > com.google.gwt.user.client.rpc.core.java.util.Collection_CustomFieldSerializerBase.serialize(Collection_CustomFieldSerializerBase.java:43) > at > com.google.gwt.user.client.rpc.core.java.util.ArrayList_CustomFieldSerializer.serialize(ArrayList_CustomFieldSerializer.java:36) > ... 30 more > > Or is there any other way by which i can implement it.(eg requestbuilder ) > > Plz guide me. > Regards > Jayalakshmi -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to google-web-tool...@googlegroups.com. 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