Your Attribute class has a non-final, non-transient field of type "Object".
That will stop Attribute from being gwt-serializable, which in turn stops Node and
XmlNode. Object is not supported for gwt serialization. It doesn't matter if you only
ever happen to put gwt-serializable things in there, gwt won't accept it.
To answer your question though, one of the files output from the gwt compile is
a *.rpc.log, and that gives detail on why things were or were not thought to be
serializable.
Incidentally, you're better off with declaring class fields that are lists as
ArrayList rather than List. Otherwise, gwt will have to generate serialization
code for every implementation of List. GWT best practice in this regard is the
opposite of general Java best practice.
Paul
On 04/11/11 14:58, laredotornado wrote:
Hi, Yes, in all three classes I have a no-argument public constructor,
like
public XmlNode() { }
Is there a way to get more specific information about why its
failing? Thanks, - Dave
On Nov 4, 9:37 am, Juan Pablo Gardella<gardellajuanpa...@gmail.com>
wrote:
Do you have a public/package default constructor?
2011/11/4 Juan Pablo Gardella<gardellajuanpa...@gmail.com>
puff, ignore the last mail.
2011/11/4 Juan Pablo Gardella<gardellajuanpa...@gmail.com>
You don't have in classpath the sources
of com.cme.clearing.common.xml.XmlNode. This is the cause.
2011/11/4 laredotornado<laredotorn...@zipmail.com>
Hi,
I'm trying to pass an object over RPC but the call is failing with a
"com.google.gwt.user.client.rpc.SerializationException" exception.
Complete stack trace is below. How do I figure out what field is
causing the problem? The class and its member fields in question
are ...
public class XmlNode implements Serializable {
private Node dataRoot;
private List<XmlNode> parents = new ArrayList<XmlNode>();
private List<XmlNode> children = new ArrayList<XmlNode>();
...
public class Node implements Serializable {
private long id;
private short type;
private String name;
private String value;
private List<Node> children;
private Node parent;
private Map<String, Attribute> attributes;
...
public class Attribute implements Serializable {
private String name;
private Object value;
private Node node;
There are getters and setters for everything. How do I get GWT to
tell me more about why Serialization is failing? - Dave
ps - The error stack trace is
com.google.gwt.user.client.rpc.SerializationException: Type
'com.cme.clearing.common.xml.XmlNode' 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 = XmlNode
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.seriali
ze(ServerSerializationStreamWriter.java:
619)
at
com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.write
Object(AbstractSerializationStreamWriter.java:
126)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter
$ValueWriter$8.write(ServerSerializationStreamWriter.java:153)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.seriali
zeValue(ServerSerializationStreamWriter.java:
539)
at com.google.gwt.user.server.rpc.RPC.encodeResponse(RPC.java:616)
at
com.google.gwt.user.server.rpc.RPC.encodeResponseForSuccess(RPC.java:
474)
at
com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:
571)
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServi
ceServlet.java:
208)
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServi
ceServlet.java:
248)
at
com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(Abstract
RemoteServiceServlet.java:
62)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
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.HandlerWrapper.handle(HandlerWrapper.java:
152)
at
org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:
49)
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.QueuedThreadPool
$PoolThread.run(QueuedThreadPool.java:488)
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