Best way to work with the iterator of IDataProvider
Hi,
I would like to know what is the best way to work with the method
iterator of DataProvider.
I have created a class implementing IDataProvider. Depending of a
parameter, the DAO service called is not the same inside in the
iterator method. For some DAO services, a list is returned but for one
service, an object is returned instead of a list.
If I try to create a ArrayList inside the iterator, the following
error is generated :
org.apache.wicket.util.io.SerializableChecker$WicketNotSerializableException:
Unable to serialize class: java.util.AbstractList$Itr
Field hierarchy is:
0 [class=com.xpectis.x3s.fundbox.web.RequestPage, path=0]
private java.lang.Object
org.apache.wicket.MarkupContainer.children [class=[Ljava.lang.Object;]
java.lang.Object org.apache.wicket.Component.data[3]
[class=com.xpectis.x3s.fundbox.web.RequestPage$1, path=0:requestList]
private final
org.apache.wicket.markup.repeater.data.IDataProvider
org.apache.wicket.markup.repeater.data.DataViewBase.dataProvider
[class=com.xpectis.x3s.fundbox.web.data.RequestProvider]
private java.util.Iterator
com.xpectis.x3s.fundbox.web.data.RequestProvider.it
[class=java.util.AbstractList$Itr] - field that is not
serializable
at
org.apache.wicket.util.io.SerializableChecker.check(SerializableChecker.java:346)
How can I avoid this issue ?
Here is my code :
public class RequestProvider implements IDataProvider {
...
public Iterator iterator(int first, int count) {
result = new ArrayListPlatformDTO();
if (requestFormModel != null) {
if (requestFormModel.getId() != null) {
request =
requestService.getRequest(requestFormModel.getId());
result.add(request);
it = result.iterator();
} else if (requestFormModel.getFileName() != null) {
it =
requestService.findRequestByFileName(requestFormModel.getFileName()).iterator();
}
Regards,
Charles Moulliard
Senior Enterprise Architect
Apache Camel Committer
*
blog : http://cmoulliard.blogspot.com
-
To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
For additional commands, e-mail: users-h...@wicket.apache.org
Re: Best way to work with the iterator of IDataProvider
I see several undefined objects:
result
requestFormModel
it
If these are defined at the class level, they must be serializable.
If you have Logging set at Info, Wicket will give you the actual field that
is not serializable, although from the error it looks like something to do
with AbstractList
Iterator objects are not serializable. I would look at how you are defining
the it variable.
On Mon, Sep 28, 2009 at 7:25 AM, Charles Moulliard cmoulli...@gmail.comwrote:
Hi,
I would like to know what is the best way to work with the method
iterator of DataProvider.
I have created a class implementing IDataProvider. Depending of a
parameter, the DAO service called is not the same inside in the
iterator method. For some DAO services, a list is returned but for one
service, an object is returned instead of a list.
If I try to create a ArrayList inside the iterator, the following
error is generated :
org.apache.wicket.util.io.SerializableChecker$WicketNotSerializableException:
Unable to serialize class: java.util.AbstractList$Itr
Field hierarchy is:
0 [class=com.xpectis.x3s.fundbox.web.RequestPage, path=0]
private java.lang.Object
org.apache.wicket.MarkupContainer.children [class=[Ljava.lang.Object;]
java.lang.Object org.apache.wicket.Component.data[3]
[class=com.xpectis.x3s.fundbox.web.RequestPage$1, path=0:requestList]
private final
org.apache.wicket.markup.repeater.data.IDataProvider
org.apache.wicket.markup.repeater.data.DataViewBase.dataProvider
[class=com.xpectis.x3s.fundbox.web.data.RequestProvider]
private java.util.Iterator
com.xpectis.x3s.fundbox.web.data.RequestProvider.it
[class=java.util.AbstractList$Itr] - field that is not
serializable
at
org.apache.wicket.util.io.SerializableChecker.check(SerializableChecker.java:346)
How can I avoid this issue ?
Here is my code :
public class RequestProvider implements IDataProvider {
...
public Iterator iterator(int first, int count) {
result = new ArrayListPlatformDTO();
if (requestFormModel != null) {
if (requestFormModel.getId() != null) {
request =
requestService.getRequest(requestFormModel.getId());
result.add(request);
it = result.iterator();
} else if (requestFormModel.getFileName() != null) {
it =
requestService.findRequestByFileName(requestFormModel.getFileName()).iterator();
}
Regards,
Charles Moulliard
Senior Enterprise Architect
Apache Camel Committer
*
blog : http://cmoulliard.blogspot.com
-
To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
For additional commands, e-mail: users-h...@wicket.apache.org
Re: Best way to work with the iterator of IDataProvider
Further, you don't really need to define the Iterator, just return them.
public Iterator iterator(int first, int count) {
result = new ArrayListPlatformDTO();
if (requestFormModel != null) {
if (requestFormModel.getId() != null) {
request =
requestService.getRequest(requestFormModel.getId());
result.add(request);
return result.iterator();
} else if (requestFormModel.getFileName() != null) {
return
requestService.findRequestByFileName(requestFormModel.getFileName()).iterator();
On Mon, Sep 28, 2009 at 9:08 AM, T Ames tamesw...@gmail.com wrote:
I see several undefined objects:
result
requestFormModel
it
If these are defined at the class level, they must be serializable.
If you have Logging set at Info, Wicket will give you the actual field that
is not serializable, although from the error it looks like something to do
with AbstractList
Iterator objects are not serializable. I would look at how you are
defining the it variable.
On Mon, Sep 28, 2009 at 7:25 AM, Charles Moulliard
cmoulli...@gmail.comwrote:
Hi,
I would like to know what is the best way to work with the method
iterator of DataProvider.
I have created a class implementing IDataProvider. Depending of a
parameter, the DAO service called is not the same inside in the
iterator method. For some DAO services, a list is returned but for one
service, an object is returned instead of a list.
If I try to create a ArrayList inside the iterator, the following
error is generated :
org.apache.wicket.util.io.SerializableChecker$WicketNotSerializableException:
Unable to serialize class: java.util.AbstractList$Itr
Field hierarchy is:
0 [class=com.xpectis.x3s.fundbox.web.RequestPage, path=0]
private java.lang.Object
org.apache.wicket.MarkupContainer.children [class=[Ljava.lang.Object;]
java.lang.Object org.apache.wicket.Component.data[3]
[class=com.xpectis.x3s.fundbox.web.RequestPage$1, path=0:requestList]
private final
org.apache.wicket.markup.repeater.data.IDataProvider
org.apache.wicket.markup.repeater.data.DataViewBase.dataProvider
[class=com.xpectis.x3s.fundbox.web.data.RequestProvider]
private java.util.Iterator
com.xpectis.x3s.fundbox.web.data.RequestProvider.it
[class=java.util.AbstractList$Itr] - field that is not
serializable
at
org.apache.wicket.util.io.SerializableChecker.check(SerializableChecker.java:346)
How can I avoid this issue ?
Here is my code :
public class RequestProvider implements IDataProvider {
...
public Iterator iterator(int first, int count) {
result = new ArrayListPlatformDTO();
if (requestFormModel != null) {
if (requestFormModel.getId() != null) {
request =
requestService.getRequest(requestFormModel.getId());
result.add(request);
it = result.iterator();
} else if (requestFormModel.getFileName() != null)
{
it =
requestService.findRequestByFileName(requestFormModel.getFileName()).iterator();
}
Regards,
Charles Moulliard
Senior Enterprise Architect
Apache Camel Committer
*
blog : http://cmoulliard.blogspot.com
-
To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
For additional commands, e-mail: users-h...@wicket.apache.org
Re: Best way to work with the iterator of IDataProvider
Iterator is not serializable,
wicket will try to serialize it if it's at class level
so either move it inside iterator method
or make it transient ,
In your case,you can easily move it inside method ;)
--
regards,
Vineet Semwal
On Mon, Sep 28, 2009 at 6:42 PM, T Ames tamesw...@gmail.com wrote:
Further, you don't really need to define the Iterator, just return them.
public Iterator iterator(int first, int count) {
result = new ArrayListPlatformDTO();
if (requestFormModel != null) {
if (requestFormModel.getId() != null) {
request =
requestService.getRequest(requestFormModel.getId());
result.add(request);
return result.iterator();
} else if (requestFormModel.getFileName() != null)
{
return
requestService.findRequestByFileName(requestFormModel.getFileName()).iterator();
On Mon, Sep 28, 2009 at 9:08 AM, T Ames tamesw...@gmail.com wrote:
I see several undefined objects:
result
requestFormModel
it
If these are defined at the class level, they must be serializable.
If you have Logging set at Info, Wicket will give you the actual field
that
is not serializable, although from the error it looks like something to
do
with AbstractList
Iterator objects are not serializable. I would look at how you are
defining the it variable.
On Mon, Sep 28, 2009 at 7:25 AM, Charles Moulliard cmoulli...@gmail.com
wrote:
Hi,
I would like to know what is the best way to work with the method
iterator of DataProvider.
I have created a class implementing IDataProvider. Depending of a
parameter, the DAO service called is not the same inside in the
iterator method. For some DAO services, a list is returned but for one
service, an object is returned instead of a list.
If I try to create a ArrayList inside the iterator, the following
error is generated :
org.apache.wicket.util.io.SerializableChecker$WicketNotSerializableException:
Unable to serialize class: java.util.AbstractList$Itr
Field hierarchy is:
0 [class=com.xpectis.x3s.fundbox.web.RequestPage, path=0]
private java.lang.Object
org.apache.wicket.MarkupContainer.children [class=[Ljava.lang.Object;]
java.lang.Object org.apache.wicket.Component.data[3]
[class=com.xpectis.x3s.fundbox.web.RequestPage$1, path=0:requestList]
private final
org.apache.wicket.markup.repeater.data.IDataProvider
org.apache.wicket.markup.repeater.data.DataViewBase.dataProvider
[class=com.xpectis.x3s.fundbox.web.data.RequestProvider]
private java.util.Iterator
com.xpectis.x3s.fundbox.web.data.RequestProvider.it
[class=java.util.AbstractList$Itr] - field that is not
serializable
at
org.apache.wicket.util.io.SerializableChecker.check(SerializableChecker.java:346)
How can I avoid this issue ?
Here is my code :
public class RequestProvider implements IDataProvider {
...
public Iterator iterator(int first, int count) {
result = new ArrayListPlatformDTO();
if (requestFormModel != null) {
if (requestFormModel.getId() != null) {
request =
requestService.getRequest(requestFormModel.getId());
result.add(request);
it = result.iterator();
} else if (requestFormModel.getFileName() !=
null)
{
it =
requestService.findRequestByFileName(requestFormModel.getFileName()).iterator();
}
Regards,
Charles Moulliard
Senior Enterprise Architect
Apache Camel Committer
*
blog : http://cmoulliard.blogspot.com
-
To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
For additional commands, e-mail: users-h...@wicket.apache.org
Re: Best way to work with the iterator of IDataProvider
I have found the error.
List Result = new ArrayListPlatformDTO(); must be defined outside of the
iterator method
and also the answer to my question.
When the result is empty or null, then I must return a null iterator
T Ames wrote:
I see several undefined objects:
result
requestFormModel
it
If these are defined at the class level, they must be serializable.
If you have Logging set at Info, Wicket will give you the actual field
that
is not serializable, although from the error it looks like something to do
with AbstractList
Iterator objects are not serializable. I would look at how you are
defining
the it variable.
On Mon, Sep 28, 2009 at 7:25 AM, Charles Moulliard
cmoulli...@gmail.comwrote:
Hi,
I would like to know what is the best way to work with the method
iterator of DataProvider.
I have created a class implementing IDataProvider. Depending of a
parameter, the DAO service called is not the same inside in the
iterator method. For some DAO services, a list is returned but for one
service, an object is returned instead of a list.
If I try to create a ArrayList inside the iterator, the following
error is generated :
org.apache.wicket.util.io.SerializableChecker$WicketNotSerializableException:
Unable to serialize class: java.util.AbstractList$Itr
Field hierarchy is:
0 [class=com.xpectis.x3s.fundbox.web.RequestPage, path=0]
private java.lang.Object
org.apache.wicket.MarkupContainer.children [class=[Ljava.lang.Object;]
java.lang.Object org.apache.wicket.Component.data[3]
[class=com.xpectis.x3s.fundbox.web.RequestPage$1, path=0:requestList]
private final
org.apache.wicket.markup.repeater.data.IDataProvider
org.apache.wicket.markup.repeater.data.DataViewBase.dataProvider
[class=com.xpectis.x3s.fundbox.web.data.RequestProvider]
private java.util.Iterator
com.xpectis.x3s.fundbox.web.data.RequestProvider.it
[class=java.util.AbstractList$Itr] - field that is not
serializable
at
org.apache.wicket.util.io.SerializableChecker.check(SerializableChecker.java:346)
How can I avoid this issue ?
Here is my code :
public class RequestProvider implements IDataProvider {
...
public Iterator iterator(int first, int count) {
result = new ArrayListPlatformDTO();
if (requestFormModel != null) {
if (requestFormModel.getId() != null) {
request =
requestService.getRequest(requestFormModel.getId());
result.add(request);
it = result.iterator();
} else if (requestFormModel.getFileName() != null)
{
it =
requestService.findRequestByFileName(requestFormModel.getFileName()).iterator();
}
Regards,
Charles Moulliard
Senior Enterprise Architect
Apache Camel Committer
*
blog : http://cmoulliard.blogspot.com
-
To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
For additional commands, e-mail: users-h...@wicket.apache.org
-
Charles Moulliard
SOA Architect
My Blog : http://cmoulliard.blogspot.com/ http://cmoulliard.blogspot.com/
--
View this message in context:
http://www.nabble.com/Best-way-to-work-with-the-iterator-of-IDataProvider-tp25644122p25645386.html
Sent from the Wicket - User mailing list archive at Nabble.com.
-
To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
For additional commands, e-mail: users-h...@wicket.apache.org
