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Posted to user@struts.apache.org by totojack <to...@tin.it> on 2008/01/22 12:21:09 UTC
[S2] Beans list in Dynamic form and ParametersInterceptor problem
Hi. I'm having problem in submitting a dynamic form created with a list of
beans.
I'm able to build the jsp with the form and (it seems...) to pass parameters
to action,
but I'm not able to get the correct list of beans after submitting the form.
I've tried with a list of 2 beans. Something really strange happens:
the list in the action is not null (ok, this shouldn't be strange, if I've
done all correctly)
and has a size equals to the id of a bean (and this is really strange, maybe
there's something wrong?...).
Due to the list size, at the end of the action there is also
OutOfMemoryError (Java heap space).
So, is it an ognl expression problem? I've tried many version but without
success.
name="#Song[SongId].startDate"
name="%{#Song[SongId]}.endDate"
name="songs[SongId].statusLoad"
name="songs[#Song.SongId].statusSellable"
name="%{songs[#Song.SongId]}.endDate"
name="%{#songs[Song.SongId]}.statusLoad"
I'm using struts 2.0.11.
Some code:
-ACTION
public class ResubmitAction extends BaseAction {
private List<Song> songs = new ArrayList();
public String resubmitCatalog() {
...
if(songs != null) {
log.debug("song size "+songs.size());
}
}
public List<Song> getSongs() {return songs;}
public void setSongs(List<Song> songs) {this.songs = songs;}
}
-BEAN
public class Song implements Serializable {
private String SongId;
...
private String StartDate;
private String EndDate;
private String StatusLoad;
private String StatusSellable;
...
public String getStartDate() {return StartDate;}
public void setStartDate(String startDate) {StartDate = startDate;}
public String getEndDate() {return EndDate;}
public void setEndDate(String endDate) {EndDate = endDate;}
public String getStatusLoad() {return StatusLoad;}
public void setStatusLoad(String statusLoad) {StatusLoad = statusLoad;}
public String getStatusSellable() {return StatusSellable;}
public void setStatusSellable(String statusSellable) {StatusSellable =
statusSellable;}
public String getSongId() {return SongId;}
public void setSongId(String songId) {SongId = songId;}
}
-CONVERSION PROP
ResubmitAction-Conversion.properties (in the same path of
ResubmitAction.java)
KeyProperty_songs=SongId
Element_songs=console.beans.Song
CreateIfNull_songs=true
-JSP
<s:iterator id="Song" value="songs">
<tr>
<td><s:hidden name="songs[%{#Song.SongId}].SongId"
value="%{#Song.SongId}"/></td>
</tr>
<tr>
<td class="txtBold">START DATE</td>
<td><s:textfield theme="simple" name="songs[%{#Song.SongId}].startDate"
/></td>
</tr>
<tr>
<td class="txtBold">END DATE</td>
<td><s:textfield theme="simple"
name="songs[%{#Song.SongId}].endDate"/></td>
</tr>
<tr>
<td class="txtBold">STATUS LOAD</td>
<td><s:textfield theme="simple" name="songs[%{#Song.SongId}].statusLoad"
/></td>
</tr>
<tr>
<td class="txtBold">STATUS SELLABLE</td>
<td><s:textfield theme="simple"
name="songs[%{#Song.SongId}].statusSellable" /></td>
</tr>
...
</s:iterator>
and the HTML is:
<input type="hidden" id="ResubmitCatalog_songs_9121587__SongId"
value="9121587" name="songs[9121587].SongId"/>
<input type="text" id="ResubmitCatalog_songs_9121587__startDate" value=""
name="songs[9121587].startDate"/>
<input type="text" id="ResubmitCatalog_songs_9121587__endDate" value=""
name="songs[9121587].endDate"/>
<input type="text" id="ResubmitCatalog_songs_9121587__statusLoad" value=""
name="songs[9121587].statusLoad"/>
<input type="text" id="ResubmitCatalog_songs_9121587__statusSellable"
value="" name="songs[9121587].statusSellable"/>
and another group of input with the second id 9121591
-LOG
DEBUG (interceptor.ParametersInterceptor:148) - Setting params (...)
songs[9121591].startDate => [ XXX ] songs[9121587].endDate => [ XXX ]
songs[9121591].statusLoad => [ XXX ] songs[9121587].statusSellable => [ XXX
] songs[9121587].SongId => [ 9121587 ] songs[9121591].endDate => [ XXX ]
songs[9121587].startDate => [ XXX ] songs[9121591].SongId => [ 9121591 ]
songs[9121591].statusSellable => [ XXX ] songs[9121587].statusLoad => [ XXX
]
ERROR (interceptor.ParametersInterceptor:204) - ParametersInterceptor -
[setParameters]: Unexpected Exception caught setting 'songs[9121587].SongId'
on 'class it.telecomitalia.orchestrator.console.actions.ResubmitAction:
Error setting expression 'songs[9121587].SongId' with value
'[Ljava.lang.String;@3ed81c'
ERROR (interceptor.ParametersInterceptor:204) - ParametersInterceptor -
[setParameters]: Unexpected Exception caught setting
'songs[9121587].endDate' on 'class
it.telecomitalia.orchestrator.console.actions.ResubmitAction: Error setting
expression 'songs[9121587].endDate' with value '[Ljava.lang.String;@1de52ea'
ERROR (interceptor.ParametersInterceptor:204) - ParametersInterceptor -
[setParameters]: Unexpected Exception caught setting
'songs[9121587].startDate' on 'class
it.telecomitalia.orchestrator.console.actions.ResubmitAction: Error setting
expression 'songs[9121587].startDate' with value
'[Ljava.lang.String;@1158ce4'
(...)
song size = 9121591
(...)
ERROR java.lang.OutOfMemoryError: Java heap space
Thanks in advance.
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Re: [S2] Beans list in Dynamic form and ParametersInterceptor
problem
Posted by jimski <ji...@gmail.com>.
Hi totojack-
I think you're right that the key property is useless now that you're using
the positional index to access your list elements.
Also, the type conversion page says that using the unique id indexed
approach won't allow for automatic creation of instances. The docs say the
following: "Unlike Map and List element properties, if fooCollection(22)
does not exist, it will not be created. If you would like it created, use
the notation fooCollection.makeNew[index] where index is an integer 0, 1,
and so on."
I haven't been able to get makeNew to work and no one on the list responded
to a previous question on it so I'm assuming that the feature is deprecated
and the documentation is out of date. Which is really a shame since
positional indexing of a list comes with some risks that accessing elements
by unique id does not. You can write some hacks to get around this, but
they lack the elegance that a web framework that really understood
collections could have provided.
totojack wrote:
>
> The problem of songs list size is solved using #stat.index. But not the
> parameters error.
> The list size now is 1, but the element inside is null.
> So, it can't create song beans and put it into the list.
> In the conversion props file the Element_songs is correctly set to the
> Song bean class.
> The KeyProperty is useless now using the iterator index?
>
> Here some logs:
> DEBUG (interceptor.ParametersInterceptor:148) - Setting params
> songs[1].endDate => [ 01.01.2099 ] [ ] songs[0].endDate => [ 01.01.2099 ]
> songs[0].statusLoad => [ Publish ] songs[0].statusSellable => [ 1 ]
> songs[1].songId => [ 9121591 ] songs[1].statusLoad => [ Publish ]
> songs[1].statusSellable => [ 1 ] songs[0].songId => [ 9121587 ]
> songs[0].startDate => [ 29.11.2007 ] songs[1].startDate => [ 29.11.2007 ]
> ERROR (interceptor.ParametersInterceptor:204) - ParametersInterceptor -
> [setParameters]: Unexpected Exception caught setting 'songs[0].endDate' on
> 'class it.telecomitalia.orchestrator.console.actions.ResubmitAction: Error
> setting expression 'songs[0].endDate' with value
> '[Ljava.lang.String;@16825b5'
> (...)
>
>
> Reading the manual at
> http://struts.apache.org/2.0.11/docs/type-conversion.html it says:
> "Notice the () notation! Do not use [] notation, which is for Maps only!"
> but changing the notation from
> songs[%{#stat.index}].property
> to
> songs(%{#stat.index}).property
> in the jsp, the form isn't populated.
>
>
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Re: [S2] Beans list in Dynamic form and ParametersInterceptor
problem
Posted by totojack <to...@tin.it>.
Hi.
I've solved the problem. And the solution was... reading the documentation
with great attention!!!
In particular, from
http://struts.apache.org/2.0.11/docs/type-conversion.html, the paragraph
"Relationship to Parameter Names":
1 - Use JavaBeans! The framework can only create objects if the objects obey
the JavaBean specification and provide no-arg constructions, as well as
getters and setters where appropriate
2 - Remember that person.name will call getPerson().setName(), but if in
order for the framework to create the Person object for you, a setPerson
must also exist
So: in the bean class, I've added a no-arg constructor; in the action class,
I've added a property Song and a setSong method. And now I'm able to fill
the list of beans modified from the form in the jsp, and use it in the
action.
I summerize all for future benefits.
-Problem: submit a dynamic form created with a list of beans and use these
beans in the action.
-BEAN
Provide a no-arg constructor and getters and setters for all properties.
public class Song implements Serializable {
private String SongId;
private String StartDate;
private String EndDate;
private String StatusLoad;
private String StatusSellable;
public Song(){}
public String getStartDate() {return StartDate;}
public void setStartDate(String startDate) {StartDate = startDate;}
public String getEndDate() {return EndDate;}
public void setEndDate(String endDate) {EndDate = endDate;}
public String getStatusLoad() {return StatusLoad;}
public void setStatusLoad(String statusLoad) {StatusLoad = statusLoad;}
public String getStatusSellable() {return StatusSellable;}
public void setStatusSellable(String statusSellable) {StatusSellable =
statusSellable;}
public String getSongId() {return SongId;}
public void setSongId(String songId) {SongId = songId;}
}
-ACTION
Provide the beans list property with get and set, and a bean property with
set.
public class ResubmitAction extends BaseAction {
private List<Song> songs = new ArrayList();
private Song song = null;
public String resubmitCatalog() {
...
//use the beans list coming from the form
if (this.songs != null) {
log.debug("song list size "+songs.size());
Iterator iter = this.songs.iterator();
while (iter.hasNext()) {
Song tmp = (Song) iter.next();
if (tmp != null) {
log.debug("------\n"+tmp.toString()+"\n------");
}
}
}
}
public List<Song> getSongs() {return songs;}
public void setSongs(List<Song> songs) {this.songs = songs;}
public void setSong(Song song) {this.song = song;}
}
-CONVERSION PROPERTIES FILE
Create a ActionName-conversion.properties file in the same path of the
action,
so in my case ResubmitAction-conversion.properties where
ResubmitAction.class is located.
Element_songs=console.beans.Song
CreateIfNull_songs=true
In the first version of the file there was also the line
KeyProperty_songs=SongId
but this is useless because in the jsp I don't use the unique id
of the bean for iteration throw the list.
-JSP
Create the form using iterator tag and use stat.index to reference the
current iteration index.
Pay attention to the ognl expression.
<s:iterator id="Song" value="songs" status="stat">
<tr>
<td>
<s:hidden name="songs[%{#stat.index}].songId"/>
</td>
</tr>
<tr>
<td class="txtBold">START DATE</td>
<td><jscalendar:jscalendar format="%d.%m.%Y"
name="songs[%{#stat.index}].startDate" /></td>
</tr>
<tr>
<td class="txtBold">END DATE</td>
<td><jscalendar:jscalendar format="%d.%m.%Y"
name="songs[%{#stat.index}].endDate"/></td>
</tr>
<tr>
<td class="txtBold">STATUS LOAD</td>
<td><s:textfield theme="simple" name="songs[%{#stat.index}].statusLoad"
/></td>
</tr>
<tr>
<td class="txtBold">STATUS SELLABLE</td>
<td><s:textfield theme="simple" name="songs[%{#stat.index}].statusSellable"
/></td>
</tr>
</s:iterator>
and the resulting html is (the beans list has 2 elements):
<input type="hidden" id="ResubmitCatalog_songs_0__songId" value="9121587"
name="songs[0].songId"/>
<input type="text" id="ResubmitCatalog_songs_0__startDate"
value="29.11.2007" name="songs[0].startDate"/>
<input type="text" id="ResubmitCatalog_songs_0__endDate" value="29.11.2007"
name="songs[0].endDate"/>
<input type="text" id="ResubmitCatalog_songs_0__statusLoad" value="Publish"
name="songs[0].statusLoad"/>
<input type="text" id="ResubmitCatalog_songs_0__statusSellable" value="1"
name="songs[0].statusSellable"/>
<input type="hidden" id="ResubmitCatalog_songs_1__songId" value="9121591"
name="songs[1].songId"/>
<input type="text" id="ResubmitCatalog_songs_1__startDate"
value="29.11.2007" name="songs[1].startDate"/>
<input type="text" id="ResubmitCatalog_songs_1__endDate" value="29.11.2007"
name="songs[1].endDate"/>
<input type="text" id="ResubmitCatalog_songs_1__statusLoad" value="Publish"
name="songs[1].statusLoad"/>
<input type="text" id="ResubmitCatalog_songs_1__statusSellable" value="1"
name="songs[1].statusSellable"/>
That's all. And I think it's enough...
It was hard, but with an happy end.
Thanks to all for replies to my first post.
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RE: [S2] Beans list in Dynamic form and ParametersInterceptor
problem
Posted by totojack <to...@tin.it>.
Hi David,
the OutOfMemoryError was solved using %{#stat.index} in the inputs, as
suggested by Laurie Harper.
You're right about the web server heap space, but the cause of the error was
obviously my wrong
ognl expression.
Does this stack trace begin with a java.lang.OutOfMemoryError as well?
Have you tried increasing the heap space size for your Web Server?
Just a thought . . .
Regards,
David Hernandez
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RE: [S2] Beans list in Dynamic form and ParametersInterceptor problem
Posted by "Hernandez, David" <da...@lehman.com>.
Does this stack trace begin with a java.lang.OutOfMemoryError as well?
Have you tried increasing the heap space size for your Web Server?
Just a thought . . .
Regards,
David Hernandez
-----Original Message-----
From: totojack [mailto:totojack@tin.it]
Sent: Tuesday, January 22, 2008 11:35 AM
To: user@struts.apache.org
Subject: Re: [S2] Beans list in Dynamic form and ParametersInterceptor
problem
The problem of songs list size is solved using #stat.index. But not the
parameters error.
The list size now is 1, but the element inside is null.
So, it can't create song beans and put it into the list.
In the conversion props file the Element_songs is correctly set to the
Song bean class.
The KeyProperty is useless now using the iterator index?
Here some logs:
DEBUG (interceptor.ParametersInterceptor:148) - Setting params
songs[1].endDate => [ 01.01.2099 ] [ ] songs[0].endDate => [ 01.01.2099
] songs[0].statusLoad => [ Publish ] songs[0].statusSellable => [ 1 ]
songs[1].songId => [ 9121591 ] songs[1].statusLoad => [ Publish ]
songs[1].statusSellable => [ 1 ] songs[0].songId => [ 9121587 ]
songs[0].startDate => [ 29.11.2007 ] songs[1].startDate => [ 29.11.2007
] ERROR (interceptor.ParametersInterceptor:204) - ParametersInterceptor
-
[setParameters]: Unexpected Exception caught setting 'songs[0].endDate'
on 'class it.telecomitalia.orchestrator.console.actions.ResubmitAction:
Error setting expression 'songs[0].endDate' with value
'[Ljava.lang.String;@16825b5'
(...)
Reading the manual at
http://struts.apache.org/2.0.11/docs/type-conversion.html it says:
"Notice the () notation! Do not use [] notation, which is for Maps
only!"
but changing the notation from
songs[%{#stat.index}].property
to
songs(%{#stat.index}).property
in the jsp, the form isn't populated.
--
View this message in context:
http://www.nabble.com/-S2--Beans-list-in-Dynamic-form-and-ParametersInte
rceptor-problem-tp15016850p15022328.html
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Re: [S2] Beans list in Dynamic form and ParametersInterceptor
problem
Posted by totojack <to...@tin.it>.
The problem of songs list size is solved using #stat.index. But not the
parameters error.
The list size now is 1, but the element inside is null.
So, it can't create song beans and put it into the list.
In the conversion props file the Element_songs is correctly set to the Song
bean class.
The KeyProperty is useless now using the iterator index?
Here some logs:
DEBUG (interceptor.ParametersInterceptor:148) - Setting params
songs[1].endDate => [ 01.01.2099 ] [ ] songs[0].endDate => [ 01.01.2099 ]
songs[0].statusLoad => [ Publish ] songs[0].statusSellable => [ 1 ]
songs[1].songId => [ 9121591 ] songs[1].statusLoad => [ Publish ]
songs[1].statusSellable => [ 1 ] songs[0].songId => [ 9121587 ]
songs[0].startDate => [ 29.11.2007 ] songs[1].startDate => [ 29.11.2007 ]
ERROR (interceptor.ParametersInterceptor:204) - ParametersInterceptor -
[setParameters]: Unexpected Exception caught setting 'songs[0].endDate' on
'class it.telecomitalia.orchestrator.console.actions.ResubmitAction: Error
setting expression 'songs[0].endDate' with value
'[Ljava.lang.String;@16825b5'
(...)
Reading the manual at
http://struts.apache.org/2.0.11/docs/type-conversion.html it says:
"Notice the () notation! Do not use [] notation, which is for Maps only!"
but changing the notation from
songs[%{#stat.index}].property
to
songs(%{#stat.index}).property
in the jsp, the form isn't populated.
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Re: [S2] Beans list in Dynamic form and ParametersInterceptor problem
Posted by Laurie Harper <la...@holoweb.net>.
The problem looks to be that you're using the song ID as a list index:
<s:iterator id="Song" value="songs">
<tr>
<td><s:hidden name="songs[%{#Song.SongId}].SongId" ...
If the value of SongId for the first item in the list is 658, on submit
Struts will try and put that song's data at index 658 in the list...!
What you probably want is:
<s:iterator id="Song" value="songs" status="stat">
<tr>
<td><s:hidden name="songs[%{#stat.index}].SongId" ...
(where status.index references the current iteration index).
HTH,
L.
totojack wrote:
> Hi. I'm having problem in submitting a dynamic form created with a list of
> beans.
> I'm able to build the jsp with the form and (it seems...) to pass parameters
> to action,
> but I'm not able to get the correct list of beans after submitting the form.
> I've tried with a list of 2 beans. Something really strange happens:
> the list in the action is not null (ok, this shouldn't be strange, if I've
> done all correctly)
> and has a size equals to the id of a bean (and this is really strange, maybe
> there's something wrong?...).
> Due to the list size, at the end of the action there is also
> OutOfMemoryError (Java heap space).
>
> So, is it an ognl expression problem? I've tried many version but without
> success.
> name="#Song[SongId].startDate"
> name="%{#Song[SongId]}.endDate"
> name="songs[SongId].statusLoad"
> name="songs[#Song.SongId].statusSellable"
> name="%{songs[#Song.SongId]}.endDate"
> name="%{#songs[Song.SongId]}.statusLoad"
>
> I'm using struts 2.0.11.
>
> Some code:
>
> -ACTION
> public class ResubmitAction extends BaseAction {
> private List<Song> songs = new ArrayList();
> public String resubmitCatalog() {
> ...
> if(songs != null) {
> log.debug("song size "+songs.size());
> }
> }
> public List<Song> getSongs() {return songs;}
> public void setSongs(List<Song> songs) {this.songs = songs;}
> }
>
> -BEAN
> public class Song implements Serializable {
> private String SongId;
> ...
> private String StartDate;
> private String EndDate;
> private String StatusLoad;
> private String StatusSellable;
> ...
> public String getStartDate() {return StartDate;}
> public void setStartDate(String startDate) {StartDate = startDate;}
> public String getEndDate() {return EndDate;}
> public void setEndDate(String endDate) {EndDate = endDate;}
> public String getStatusLoad() {return StatusLoad;}
> public void setStatusLoad(String statusLoad) {StatusLoad = statusLoad;}
> public String getStatusSellable() {return StatusSellable;}
> public void setStatusSellable(String statusSellable) {StatusSellable =
> statusSellable;}
> public String getSongId() {return SongId;}
> public void setSongId(String songId) {SongId = songId;}
> }
>
> -CONVERSION PROP
> ResubmitAction-Conversion.properties (in the same path of
> ResubmitAction.java)
>
> KeyProperty_songs=SongId
> Element_songs=console.beans.Song
> CreateIfNull_songs=true
>
> -JSP
> <s:iterator id="Song" value="songs">
> <tr>
> <td><s:hidden name="songs[%{#Song.SongId}].SongId"
> value="%{#Song.SongId}"/></td>
> </tr>
> <tr>
> <td class="txtBold">START DATE</td>
> <td><s:textfield theme="simple" name="songs[%{#Song.SongId}].startDate"
> /></td>
> </tr>
> <tr>
> <td class="txtBold">END DATE</td>
> <td><s:textfield theme="simple"
> name="songs[%{#Song.SongId}].endDate"/></td>
> </tr>
> <tr>
> <td class="txtBold">STATUS LOAD</td>
> <td><s:textfield theme="simple" name="songs[%{#Song.SongId}].statusLoad"
> /></td>
> </tr>
> <tr>
> <td class="txtBold">STATUS SELLABLE</td>
> <td><s:textfield theme="simple"
> name="songs[%{#Song.SongId}].statusSellable" /></td>
> </tr>
> ....
> </s:iterator>
>
> and the HTML is:
>
> <input type="hidden" id="ResubmitCatalog_songs_9121587__SongId"
> value="9121587" name="songs[9121587].SongId"/>
> <input type="text" id="ResubmitCatalog_songs_9121587__startDate" value=""
> name="songs[9121587].startDate"/>
> <input type="text" id="ResubmitCatalog_songs_9121587__endDate" value=""
> name="songs[9121587].endDate"/>
> <input type="text" id="ResubmitCatalog_songs_9121587__statusLoad" value=""
> name="songs[9121587].statusLoad"/>
> <input type="text" id="ResubmitCatalog_songs_9121587__statusSellable"
> value="" name="songs[9121587].statusSellable"/>
>
> and another group of input with the second id 9121591
>
>
> -LOG
> DEBUG (interceptor.ParametersInterceptor:148) - Setting params (...)
> songs[9121591].startDate => [ XXX ] songs[9121587].endDate => [ XXX ]
> songs[9121591].statusLoad => [ XXX ] songs[9121587].statusSellable => [ XXX
> ] songs[9121587].SongId => [ 9121587 ] songs[9121591].endDate => [ XXX ]
> songs[9121587].startDate => [ XXX ] songs[9121591].SongId => [ 9121591 ]
> songs[9121591].statusSellable => [ XXX ] songs[9121587].statusLoad => [ XXX
> ]
> ERROR (interceptor.ParametersInterceptor:204) - ParametersInterceptor -
> [setParameters]: Unexpected Exception caught setting 'songs[9121587].SongId'
> on 'class it.telecomitalia.orchestrator.console.actions.ResubmitAction:
> Error setting expression 'songs[9121587].SongId' with value
> '[Ljava.lang.String;@3ed81c'
> ERROR (interceptor.ParametersInterceptor:204) - ParametersInterceptor -
> [setParameters]: Unexpected Exception caught setting
> 'songs[9121587].endDate' on 'class
> it.telecomitalia.orchestrator.console.actions.ResubmitAction: Error setting
> expression 'songs[9121587].endDate' with value '[Ljava.lang.String;@1de52ea'
> ERROR (interceptor.ParametersInterceptor:204) - ParametersInterceptor -
> [setParameters]: Unexpected Exception caught setting
> 'songs[9121587].startDate' on 'class
> it.telecomitalia.orchestrator.console.actions.ResubmitAction: Error setting
> expression 'songs[9121587].startDate' with value
> '[Ljava.lang.String;@1158ce4'
> (...)
> song size = 9121591
> (...)
> ERROR java.lang.OutOfMemoryError: Java heap space
>
>
> Thanks in advance.
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