Re: Sporadic errors during compilation, Checking type argument 0 of type 'java.util.Arrays.ArrayList, no default constructor.
Finally I find the solution!
In my dto I declared a property of type class X in which I declared an enum
in this manner:
public enum Type {
SHORT (S),
MEDIUM (M),
LONG (L);
private String code;
private Type(String code) {
this.code = code;
}
public String getCode() {
return code;
}
}
When I replaced the enum with constants all the strange behaviors of the
gwt rpc generator disappeared.
I dit not test more in depth to find the right declaration of the enum, but
now I know that this was the cause.
I could only point out to the GWT team that maybe it would be better to
improve the error messages to help the developer to find the right field
not compliant to the serialization policies.
Best regards
Marcello De Marco
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Re: Sporadic errors during compilation, Checking type argument 0 of type 'java.util.Arrays.ArrayList, no default constructor.
Unfortunately even this is not the solution!
I confirm that the behavior of the gwt compiler seems to be rather random.
Currently I only note that making a gwt compile only after a complete maven
clean, it seems that it fixes the problem.
Anyone has the same problem?
Marcello De Marco
Il giorno martedì 19 marzo 2013 23:55:29 UTC+1, MarDeMar ha scritto:
ERRATA CORRIGE
The solution for me is more trivial than it seemed.
I had this error using bean with a list property not initialized.
For example:
public class Order implements Serializable {
private ListItem items;
...
}
Simply initializing the list property the error disappears:
public class Order implements Serializable {
private ListItem items = *new ArrayListItem()*;
...
}
For you I believe the problem is that you initialize the property always
with a generic and this maybe causes confusion for the generator.
Regards
Marcello De Marco
Il giorno martedì 6 marzo 2012 14:42:30 UTC+1, Dan ha scritto:
Sorry for the delay in thanking you for your reply. I understand that
Objects cannot be serialized, which is why I can't understand the error
message.
Some more information:
DeviceConfiguration is has a generic type, T, which extends
DeviceProperty which is an interface. The definition of the field
'properties' is as follows:
private MapT, Serializable properties = new HashMapT,
Serializable();
So how does the compiler *sometimes* get from HashMapT, Serializable to
TreeMapK,V - Serializable - Object?
Thanks again,
Dan.
On Monday, 27 February 2012 13:59:02 UTC, Thomas Broyer wrote:
On Sunday, February 26, 2012 2:22:47 AM UTC+1, Dan wrote:
[WARN] Checking all subtypes of Object which qualify for serialization
This is your problem.
See
http://code.google.com/webtoolkit/doc/latest/DevGuideServerCommunication.html#DevGuideSerializableTypes
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Re: Sporadic errors during compilation, Checking type argument 0 of type 'java.util.Arrays.ArrayList, no default constructor.
ERRATA CORRIGE
The solution for me is more trivial than it seemed.
I had this error using bean with a list property not initialized.
For example:
public class Order implements Serializable {
private ListItem items;
...
}
Simply initializing the list property the error disappears:
public class Order implements Serializable {
private ListItem items = *new ArrayListItem()*;
...
}
For you I believe the problem is that you initialize the property always
with a generic and this maybe causes confusion for the generator.
Regards
Marcello De Marco
Il giorno martedì 6 marzo 2012 14:42:30 UTC+1, Dan ha scritto:
Sorry for the delay in thanking you for your reply. I understand that
Objects cannot be serialized, which is why I can't understand the error
message.
Some more information:
DeviceConfiguration is has a generic type, T, which extends DeviceProperty
which is an interface. The definition of the field 'properties' is as
follows:
private MapT, Serializable properties = new HashMapT,
Serializable();
So how does the compiler *sometimes* get from HashMapT, Serializable to
TreeMapK,V - Serializable - Object?
Thanks again,
Dan.
On Monday, 27 February 2012 13:59:02 UTC, Thomas Broyer wrote:
On Sunday, February 26, 2012 2:22:47 AM UTC+1, Dan wrote:
[WARN] Checking all subtypes of Object which qualify for serialization
This is your problem.
See
http://code.google.com/webtoolkit/doc/latest/DevGuideServerCommunication.html#DevGuideSerializableTypes
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Re: Sporadic errors during compilation, Checking type argument 0 of type 'java.util.Arrays.ArrayList, no default constructor.
Sorry for the delay in thanking you for your reply. I understand that Objects cannot be serialized, which is why I can't understand the error message. Some more information: DeviceConfiguration is has a generic type, T, which extends DeviceProperty which is an interface. The definition of the field 'properties' is as follows: private MapT, Serializable properties = new HashMapT, Serializable(); So how does the compiler *sometimes* get from HashMapT, Serializable to TreeMapK,V - Serializable - Object? Thanks again, Dan. On Monday, 27 February 2012 13:59:02 UTC, Thomas Broyer wrote: On Sunday, February 26, 2012 2:22:47 AM UTC+1, Dan wrote: [WARN] Checking all subtypes of Object which qualify for serialization This is your problem. See http://code.google.com/webtoolkit/doc/latest/DevGuideServerCommunication.html#DevGuideSerializableTypes -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/T11r-bii6psJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: Sporadic errors during compilation, Checking type argument 0 of type 'java.util.Arrays.ArrayList, no default constructor.
On Sunday, February 26, 2012 2:22:47 AM UTC+1, Dan wrote: [WARN] Checking all subtypes of Object which qualify for serialization This is your problem. See http://code.google.com/webtoolkit/doc/latest/DevGuideServerCommunication.html#DevGuideSerializableTypes -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/yxq47hYfbGIJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
