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Posted to user@struts.apache.org by Justin Frost <ju...@siemens.com> on 2007/11/07 23:34:39 UTC
[S2] Retrieving values from the valuestack for the tag
I am having a difficult time figuring out a solution to my problem.
I think I will start out with my class structure first. I only put in this
message what I thought was valuable.
public class Report implements java.io.Serializable {
private java.lang.String title = "";
private Vector headerRow = new Vector(); //Vector of ReportRow objects
public Vector getHeaderRow() {
return headerRow;
}
public String getTitle() {
return title;
}
}
public class ReportRow implements java.io.Serializable {
private Vector dataColumns= new Vector(); // Vector of ReportCell Objects
public Vector getDataColumns() {
return dataColumns;
}
}
public class ReportCell implements java.io.Serializable {
private String value;
public String getValue() {
return value;
}
}
public class ReportAction extends ActionSupport{
private ReportNew report;
public ReportNew getReport() { // This gives me access to "title"
return report;
}
// I need some other getter to retrieve my "value" attribute
// But I am unsure of how to go about it.
}
I want to use the <s:iterator> tag on "value". Something like below.
<s:iterator value="??????????">
<th>
<s:property value="value"/>
</th>
</s:iterator>
I can not figure out what method I need in my Action class to allow the
values to be visible.
Can someone help me out. Or is there a good example out there that I can
reference?
Thanks in advance.
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Re: [S2] Retrieving values from the valuestack for the
tag
Posted by Gary Affonso <gl...@greywether.com>.
So your container heirarchy is...
Report
- contains a Vector of ReportRow (called headerRow)
- contains a Vector of ReportCell (called dataColumn)
Shouldn't this just be a matter of a couple of nested loops? Something
like...
<s:iterator value="report.getHeaderRow()">
<s:iterator value="getDataColumns">
<s:property value="value"/>
</s:iterator>
</s:iterator>
Does that (or the corrected syntax for that idea) not work?
For myself, I'd probably be tempted to *not* do the nested loop in the
view and do it in the Report itself. Something like...
public List getAllReportCells() {
List allReportCells = new ArrayList();
.. nested looping here adding each ReportCell to the list
return allReportCells
}
<s:iterator value="report.getAllReportCells">
<s:property value="value"/>
</s:iterator>
--
This is all off the top of my head so don't expect a copy-and-paste of
this to actually work. :-)
What's confusing you, specifically? Is it how to refer to a property of
the action in the <s:iterator value""> part? Is it what to put in the
"value" part of the property tag? Are you worried that the fact this is
a Vector makes it not work with standard iteration techniques?
Seems like a very straightforward task, so I'm thinking that I'm not
understanding what the problem really is.
- Gary
Justin Frost wrote:
> I am having a difficult time figuring out a solution to my problem.
>
> I think I will start out with my class structure first. I only put in this
> message what I thought was valuable.
>
> public class Report implements java.io.Serializable {
>
> private java.lang.String title = "";
> private Vector headerRow = new Vector(); //Vector of ReportRow objects
>
> public Vector getHeaderRow() {
> return headerRow;
> }
>
> public String getTitle() {
> return title;
> }
> }
>
> public class ReportRow implements java.io.Serializable {
>
> private Vector dataColumns= new Vector(); // Vector of ReportCell Objects
>
> public Vector getDataColumns() {
> return dataColumns;
> }
> }
>
>
> public class ReportCell implements java.io.Serializable {
>
> private String value;
>
> public String getValue() {
> return value;
> }
> }
>
> public class ReportAction extends ActionSupport{
>
> private ReportNew report;
>
> public ReportNew getReport() { // This gives me access to "title"
> return report;
> }
>
> // I need some other getter to retrieve my "value" attribute
> // But I am unsure of how to go about it.
>
> }
>
> I want to use the <s:iterator> tag on "value". Something like below.
>
> <s:iterator value="??????????">
> <th>
> <s:property value="value"/>
> </th>
> </s:iterator>
>
>
> I can not figure out what method I need in my Action class to allow the
> values to be visible.
> Can someone help me out. Or is there a good example out there that I can
> reference?
>
> Thanks in advance.
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[Solved] [S2] Retrieving values from the valuestack for the
tag
Posted by Justin Frost <ju...@siemens.com>.
Here is what I figured out so far.
headerRow is a vector of ReportCell, not ReportRow.
So for the headerRow I had to create a getHeaderRow method in my action
class.
public Vector getHeaderRow(){
Report report = getReport();
return report.getHeaderRow();
}
Then my jsp to display it looks like:
<s:iterator value="headerRow">
<th>
<s:property value="value"/>
</th>
</s:iterator>
There was also a dataRows vector in Report. Using my previous iterator
setup on dataRows worked as expected.
-Justin
newton.dave wrote:
>
> --- Gary Affonso <gl...@greywether.com> wrote:
>> The debug tag is poorly documented, I think it
>> requires the dojo library. Or something. :-)
>
> You can't tell me that
> http://struts.apache.org/2.x/docs/debug.html isn't the
> acme of documentation (I'll add something).
>
> In any case, no, it doesn't require Dojo--it just
> drops a bunch of info into a hidden DIV and gives you
> a link to show it.
>
> d.
>
>
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> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
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>
>
>
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Re: [S2] Retrieving values from the valuestack for the tag
Posted by Dave Newton <ne...@yahoo.com>.
--- Gary Affonso <gl...@greywether.com> wrote:
> The debug tag is poorly documented, I think it
> requires the dojo library. Or something. :-)
You can't tell me that
http://struts.apache.org/2.x/docs/debug.html isn't the
acme of documentation (I'll add something).
In any case, no, it doesn't require Dojo--it just
drops a bunch of info into a hidden DIV and gives you
a link to show it.
d.
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Re: [S2] Retrieving values from the valuestack for the
tag
Posted by Gary Affonso <gl...@greywether.com>.
Justin Frost wrote:
> <s:iterator value="report.headerRow">
> <s:iterator value="dataColumns">
> <th>
> <s:property value="value"/>
> </th>
> </s:iterator>
> </s:iterator>
Well, you're doing exactly (almost) what I suggested so obviously more
digging needs to be done.
Here's where I'd start to dig:
1) Does the struts taglib iterator support Vectors? It should (if
you're running this on a recent JVM), but it would be good to double-check.
Speaking of JVM's, what JVM are you running this on? Vector was updated
at some point to support the standard Collection stuff but I don't know
when that happened. I suppose if you're running under an old JVM,
Vector might not be able to do what you hope it can do.
2) Are your OGNL references working the way you think?
Your first iterator refers to a property of the report object:
report.headerRow.
Is that the right syntax? Should be, but you might also try
report.getHeaderRow(). Perhaps some vagary of OGNL is tripping you up.
3) Does the OGNL stack have on it what you think it has on it? You can
use either the DebuggingInterceptor or the debug tag to get
behind-the-scenes info.
The debug tag is poorly documented, I think it requires the dojo
library. Or something. :-)
You might be better off with the interceptor:
http://struts.apache.org/2.x/struts2-core/apidocs/org/apache/struts2/interceptor/debugging/DebuggingInterceptor.html
---
That's all I got. :-)
- Gary
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Re: [S2] Retrieving values from the valuestack for the
tag
Posted by Justin Frost <ju...@siemens.com>.
This is the jsp I am using with no success. I thought it would be straight
forward.
Obviously I am missing something.
<s:iterator value="report.headerRow">
<s:iterator value="dataColumns">
<th>
<s:property value="value"/>
</th>
</s:iterator>
</s:iterator>
Justin Frost wrote:
>
> I want to iterate over the dataColumns to get the "value" from each
> dataColumn.
>
> I am trying to add S2 to an existing project. So the Vector code is old,
> circa 2001.
>
> Thanks for you help.
>
>
>
> newton.dave wrote:
>>
>> --- Justin Frost <ju...@siemens.com> wrote:
>>> private String value;
>>>
>>> public String getValue() {
>>> return value;
>>> }
>>> I want to use the <s:iterator> tag on "value".
>>
>> What? Do you mean you want to iterate over the rows in
>> the report? "value" is a string; nothing to iterate
>> over.
>>
>> report.headerRow will iterate over each item in the
>> headerRow Vector. (Consider naming it as a plural.)
>>
>> Then iterate over the dataColumns in each headerRow
>> item, and the value will be visible.
>>
>> Haven't seen a Vector for awhile.
>>
>> d.
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>> For additional commands, e-mail: user-help@struts.apache.org
>>
>>
>>
>
>
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Re: [S2] Retrieving values from the valuestack for the
tag
Posted by Justin Frost <ju...@siemens.com>.
I want to iterate over the dataColumns to get the "value" from each
dataColumn.
I am trying to add S2 to an existing project. So the Vector code is old,
circa 2001.
Thanks for you help.
newton.dave wrote:
>
> --- Justin Frost <ju...@siemens.com> wrote:
>> private String value;
>>
>> public String getValue() {
>> return value;
>> }
>> I want to use the <s:iterator> tag on "value".
>
> What? Do you mean you want to iterate over the rows in
> the report? "value" is a string; nothing to iterate
> over.
>
> report.headerRow will iterate over each item in the
> headerRow Vector. (Consider naming it as a plural.)
>
> Then iterate over the dataColumns in each headerRow
> item, and the value will be visible.
>
> Haven't seen a Vector for awhile.
>
> d.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> For additional commands, e-mail: user-help@struts.apache.org
>
>
>
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Re: [S2] Retrieving values from the valuestack for the tag
Posted by Dave Newton <ne...@yahoo.com>.
--- Justin Frost <ju...@siemens.com> wrote:
> private String value;
>
> public String getValue() {
> return value;
> }
> I want to use the <s:iterator> tag on "value".
What? Do you mean you want to iterate over the rows in
the report? "value" is a string; nothing to iterate
over.
report.headerRow will iterate over each item in the
headerRow Vector. (Consider naming it as a plural.)
Then iterate over the dataColumns in each headerRow
item, and the value will be visible.
Haven't seen a Vector for awhile.
d.
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