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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