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Posted to users@cocoon.apache.org by André Juffer <an...@oulu.fi> on 2012/10/04 08:53:10 UTC
[C3] Sting template, passing argument to method
Hello,
I am dealing with the following problem. A REST resource returns an
(DTO) object called statistics (of type Statistics) holding various
properties. With string template, each property can be inserted into an
XML file, like
<A>$statistics.propertyA$</A>
where the corresponding method on the Statistics object is getPropertyA().
One of the properties requires an argument of type String, where the
actual method signature is getNumberFor(String name). It returns an int.
The name is obtained from a list of names obtained from the statistics
objects as well. The idea is to iterate through the list of names and
return a number (int) for each name.
Thus, the XML code that I try to complete looks like:
<socials>
$statistics.names: { name |
<social>
<name>$name$</name>
<number>$statistics.numberFor(name)$</tribc:number>
</social>
}$
</socials>
The Statistics object holds among other things a Map<String, Integer>
with the requested numbers.
The line $statistics.numberFor(name)$ is however erroneous. I cannot
pass the current value of name to the method in question.
My question is now: How to pass a argument to a given method on an
object using string template. The string template website did not give a
clear answer, so maybe it is not even possible, or maybe I just
completely overlooked it.
Any help is appreciated.
--
Andre H. Juffer | Phone: +358-8-553 1161
Biocenter Oulu and | Fax: +358-8-553-1141
Department of Biochemistry | Email: andre.juffer@oulu.fi
University of Oulu, Finland | WWW: www.biochem.oulu.fi/Biocomputing/
StruBioCat | WWW: www.strubiocat.oulu.fi
Triacle Biocomputing | WWW: www.triacle-bc.com
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RE: [C3] Sting template, passing argument to method
Posted by Robby Pelssers <Ro...@nxp.com>.
Lol... you beat me to giving the solution. It's indeed dead simple. And Franscesco is right about ST only supporting javabeans style access. I had a similar issue in the past passing javascript objects from flowscript to jxtemplate generator.
So I ended up extending the native JS Object with some methods like values() and keys() which are iterable. And of course a Map has the same methods enabling you to get an enumerable of keys/ values or entries.
http://robbypelssers.blogspot.nl/2010/10/creating-higher-order-functions-in.html
Robby
-----Original Message-----
From: André Juffer [mailto:andre.juffer@oulu.fi]
Sent: Friday, October 05, 2012 11:15 AM
To: users@cocoon.apache.org
Subject: Re: [C3] Sting template, passing argument to method
I got this problem solved. As the DTO holds the requested information as a Map, I added one method that returns a Set<Map.Entry<String, String>>.
With ST it is easy to iterate:
<tribc:socials>
$statistics.socialEventParticipation: { entry |
<tribc:social>
<tribc:name>$entry.key$</tribc:name>
<tribc:number>$entry.value$</tribc:number>
</tribc:social>
}$
</tribc:socials>
On 10/05/2012 09:30 AM, Francesco Chicchiriccò wrote:
> On 04/10/2012 08:53, André Juffer wrote:
>> Hello,
>>
>> I am dealing with the following problem. A REST resource returns an
>> (DTO) object called statistics (of type Statistics) holding various
>> properties. With string template, each property can be inserted into
>> an XML file, like
>>
>> <A>$statistics.propertyA$</A>
>>
>> where the corresponding method on the Statistics object is
>> getPropertyA().
>>
>> One of the properties requires an argument of type String, where the
>> actual method signature is getNumberFor(String name). It returns an
>> int. The name is obtained from a list of names obtained from the
>> statistics objects as well. The idea is to iterate through the list
>> of names and return a number (int) for each name.
>>
>> Thus, the XML code that I try to complete looks like:
>> <socials>
>> $statistics.names: { name |
>> <social>
>> <name>$name$</name>
>> <number>$statistics.numberFor(name)$</tribc:number>
>> </social>
>> }$
>> </socials>
>>
>> The Statistics object holds among other things a Map<String, Integer>
>> with the requested numbers.
>>
>> The line $statistics.numberFor(name)$ is however erroneous. I cannot
>> pass the current value of name to the method in question.
>>
>> My question is now: How to pass a argument to a given method on an
>> object using string template. The string template website did not
>> give a clear answer, so maybe it is not even possible, or maybe I
>> just completely overlooked it.
>>
>> Any help is appreciated.
>
> Hi André.
> I am not an ST expert at all, but I really think there is no support
> for generic method invocation on ST expressions: the only methods
> supported seem to ne related to properties, "à la JavaBean".
>
> For your use case, I'd change a bit the application logic by providing
> a
> C3 REST controller that would act as a "data conversion proxy" between
> the sitemap and the actual REST resource you are currently dealing with.
> In this way you could query the external REST resource from the C3
> REST controller body and prepare the data in a format that's suitable for ST.
>
> Regards.
>
--
Andre H. Juffer | Phone: +358-8-553 1161
Biocenter Oulu and | Fax: +358-8-553-1141
Department of Biochemistry | Email: andre.juffer@oulu.fi
University of Oulu, Finland | WWW: www.biochem.oulu.fi/Biocomputing/
StruBioCat | WWW: www.strubiocat.oulu.fi
Triacle Biocomputing | WWW: www.triacle-bc.com
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Re: [C3] Sting template, passing argument to method
Posted by André Juffer <an...@oulu.fi>.
I got this problem solved. As the DTO holds the requested information as
a Map, I added one method that returns a Set<Map.Entry<String, String>>.
With ST it is easy to iterate:
<tribc:socials>
$statistics.socialEventParticipation: { entry |
<tribc:social>
<tribc:name>$entry.key$</tribc:name>
<tribc:number>$entry.value$</tribc:number>
</tribc:social>
}$
</tribc:socials>
On 10/05/2012 09:30 AM, Francesco Chicchiriccò wrote:
> On 04/10/2012 08:53, André Juffer wrote:
>> Hello,
>>
>> I am dealing with the following problem. A REST resource returns an
>> (DTO) object called statistics (of type Statistics) holding various
>> properties. With string template, each property can be inserted into
>> an XML file, like
>>
>> <A>$statistics.propertyA$</A>
>>
>> where the corresponding method on the Statistics object is
>> getPropertyA().
>>
>> One of the properties requires an argument of type String, where the
>> actual method signature is getNumberFor(String name). It returns an
>> int. The name is obtained from a list of names obtained from the
>> statistics objects as well. The idea is to iterate through the list of
>> names and return a number (int) for each name.
>>
>> Thus, the XML code that I try to complete looks like:
>> <socials>
>> $statistics.names: { name |
>> <social>
>> <name>$name$</name>
>> <number>$statistics.numberFor(name)$</tribc:number>
>> </social>
>> }$
>> </socials>
>>
>> The Statistics object holds among other things a Map<String, Integer>
>> with the requested numbers.
>>
>> The line $statistics.numberFor(name)$ is however erroneous. I cannot
>> pass the current value of name to the method in question.
>>
>> My question is now: How to pass a argument to a given method on an
>> object using string template. The string template website did not give
>> a clear answer, so maybe it is not even possible, or maybe I just
>> completely overlooked it.
>>
>> Any help is appreciated.
>
> Hi André.
> I am not an ST expert at all, but I really think there is no support for
> generic method invocation on ST expressions: the only methods supported
> seem to ne related to properties, "à la JavaBean".
>
> For your use case, I'd change a bit the application logic by providing a
> C3 REST controller that would act as a "data conversion proxy" between
> the sitemap and the actual REST resource you are currently dealing with.
> In this way you could query the external REST resource from the C3 REST
> controller body and prepare the data in a format that's suitable for ST.
>
> Regards.
>
--
Andre H. Juffer | Phone: +358-8-553 1161
Biocenter Oulu and | Fax: +358-8-553-1141
Department of Biochemistry | Email: andre.juffer@oulu.fi
University of Oulu, Finland | WWW: www.biochem.oulu.fi/Biocomputing/
StruBioCat | WWW: www.strubiocat.oulu.fi
Triacle Biocomputing | WWW: www.triacle-bc.com
---------------------------------------------------------------------
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Re: [C3] Sting template, passing argument to method
Posted by André Juffer <an...@oulu.fi>.
On 10/05/2012 12:05 PM, gelo1234 wrote:
>
> Andre,
>
> In my opinion, if you are dealing with XML data, you should turn your
> eyes into XSL[T] instead of ST.
I use ST to create the initial XML from a DTO returned by a REST
resource ('EventResource'), like
...
Map<String, Object> map = new HashMap<String, Object>();
EventStatisticsDTO dto = eventFacade_.getStatistics(eventId);
map.put("statistics", dto);
return URLResponseBuilder.newInstance(
"servlet:tribc-evt:/event-statistics." + format, map
).build();
The tribc-evt:/event-statistics calls upon the sitemap.
Depending on 'format' (either 'xml' or 'json'), I leave the XML as it
is, or I transform the XML to JSON using XSL.
Best,
André
>
> Greetings,
> Greg
>
> 2012/10/5 André Juffer <andre.juffer@oulu.fi <ma...@oulu.fi>>
>
> On 10/05/2012 09:30 AM, Francesco Chicchiriccò wrote:
>
> On 04/10/2012 08:53, André Juffer wrote:
>
> Hello,
>
> I am dealing with the following problem. A REST resource
> returns an
> (DTO) object called statistics (of type Statistics) holding
> various
> properties. With string template, each property can be
> inserted into
> an XML file, like
>
> <A>$statistics.propertyA$</A>
>
> where the corresponding method on the Statistics object is
> getPropertyA().
>
> One of the properties requires an argument of type String,
> where the
> actual method signature is getNumberFor(String name). It
> returns an
> int. The name is obtained from a list of names obtained from the
> statistics objects as well. The idea is to iterate through
> the list of
> names and return a number (int) for each name.
>
> Thus, the XML code that I try to complete looks like:
> <socials>
> $statistics.names: { name |
> <social>
> <name>$name$</name>
> <number>$statistics.numberFor(__name)$</tribc:number>
> </social>
> }$
> </socials>
>
> The Statistics object holds among other things a Map<String,
> Integer>
> with the requested numbers.
>
> The line $statistics.numberFor(name)$ is however erroneous.
> I cannot
> pass the current value of name to the method in question.
>
> My question is now: How to pass a argument to a given method
> on an
> object using string template. The string template website
> did not give
> a clear answer, so maybe it is not even possible, or maybe I
> just
> completely overlooked it.
>
> Any help is appreciated.
>
>
> Hi André.
> I am not an ST expert at all, but I really think there is no
> support for
> generic method invocation on ST expressions: the only methods
> supported
> seem to ne related to properties, "à la JavaBean".
>
>
> Yeah, that's what I thought.
>
>
>
> For your use case, I'd change a bit the application logic by
> providing a
> C3 REST controller that would act as a "data conversion proxy"
> between
> the sitemap and the actual REST resource you are currently
> dealing with.
> In this way you could query the external REST resource from the
> C3 REST
> controller body and prepare the data in a format that's suitable
> for ST.
>
>
> OK, I'll have a look at this. Alternatively, I may simply add a
> method to the DTO that returns an XML representation of the DTO.
> With ST, one would use then $statistics.asXml$ or something, but it
> appears that all > and < symbols are replaced with < and >
> which is not what I want of course.
>
> Thanks,
> Andre
>
>
> Regards.
>
>
>
> --
> Andre H. Juffer | Phone: +358-8-553 1161
> <tel:%2B358-8-553%201161>
> Biocenter Oulu and | Fax: +358-8-553-1141
> <tel:%2B358-8-553-1141>
> Department of Biochemistry | Email: andre.juffer@oulu.fi
> <ma...@oulu.fi>
> University of Oulu, Finland | WWW:
> www.biochem.oulu.fi/__Biocomputing/
> <http://www.biochem.oulu.fi/Biocomputing/>
> StruBioCat | WWW: www.strubiocat.oulu.fi
> <http://www.strubiocat.oulu.fi>
> Triacle Biocomputing | WWW: www.triacle-bc.com
> <http://www.triacle-bc.com>
>
> ------------------------------__------------------------------__---------
> To unsubscribe, e-mail: users-unsubscribe@cocoon.__apache.org
> <ma...@cocoon.apache.org>
> For additional commands, e-mail: users-help@cocoon.apache.org
> <ma...@cocoon.apache.org>
>
>
--
Andre H. Juffer | Phone: +358-8-553 1161
Biocenter Oulu and | Fax: +358-8-553-1141
Department of Biochemistry | Email: andre.juffer@oulu.fi
University of Oulu, Finland | WWW: www.biochem.oulu.fi/Biocomputing/
StruBioCat | WWW: www.strubiocat.oulu.fi
Triacle Biocomputing | WWW: www.triacle-bc.com
---------------------------------------------------------------------
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Re: [C3] Sting template, passing argument to method
Posted by gelo1234 <ge...@gmail.com>.
Andre,
In my opinion, if you are dealing with XML data, you should turn your eyes
into XSL[T] instead of ST.
Greetings,
Greg
2012/10/5 André Juffer <an...@oulu.fi>
> On 10/05/2012 09:30 AM, Francesco Chicchiriccò wrote:
>
>> On 04/10/2012 08:53, André Juffer wrote:
>>
>>> Hello,
>>>
>>> I am dealing with the following problem. A REST resource returns an
>>> (DTO) object called statistics (of type Statistics) holding various
>>> properties. With string template, each property can be inserted into
>>> an XML file, like
>>>
>>> <A>$statistics.propertyA$</A>
>>>
>>> where the corresponding method on the Statistics object is
>>> getPropertyA().
>>>
>>> One of the properties requires an argument of type String, where the
>>> actual method signature is getNumberFor(String name). It returns an
>>> int. The name is obtained from a list of names obtained from the
>>> statistics objects as well. The idea is to iterate through the list of
>>> names and return a number (int) for each name.
>>>
>>> Thus, the XML code that I try to complete looks like:
>>> <socials>
>>> $statistics.names: { name |
>>> <social>
>>> <name>$name$</name>
>>> <number>$statistics.numberFor(**name)$</tribc:number>
>>> </social>
>>> }$
>>> </socials>
>>>
>>> The Statistics object holds among other things a Map<String, Integer>
>>> with the requested numbers.
>>>
>>> The line $statistics.numberFor(name)$ is however erroneous. I cannot
>>> pass the current value of name to the method in question.
>>>
>>> My question is now: How to pass a argument to a given method on an
>>> object using string template. The string template website did not give
>>> a clear answer, so maybe it is not even possible, or maybe I just
>>> completely overlooked it.
>>>
>>> Any help is appreciated.
>>>
>>
>> Hi André.
>> I am not an ST expert at all, but I really think there is no support for
>> generic method invocation on ST expressions: the only methods supported
>> seem to ne related to properties, "à la JavaBean".
>>
>
> Yeah, that's what I thought.
>
>
>
>> For your use case, I'd change a bit the application logic by providing a
>> C3 REST controller that would act as a "data conversion proxy" between
>> the sitemap and the actual REST resource you are currently dealing with.
>> In this way you could query the external REST resource from the C3 REST
>> controller body and prepare the data in a format that's suitable for ST.
>>
>
> OK, I'll have a look at this. Alternatively, I may simply add a method to
> the DTO that returns an XML representation of the DTO. With ST, one would
> use then $statistics.asXml$ or something, but it appears that all > and <
> symbols are replaced with < and > which is not what I want of course.
>
> Thanks,
> Andre
>
>
>> Regards.
>>
>>
>
> --
> Andre H. Juffer | Phone: +358-8-553 1161
> Biocenter Oulu and | Fax: +358-8-553-1141
> Department of Biochemistry | Email: andre.juffer@oulu.fi
> University of Oulu, Finland | WWW: www.biochem.oulu.fi/**Biocomputing/<http://www.biochem.oulu.fi/Biocomputing/>
> StruBioCat | WWW: www.strubiocat.oulu.fi
> Triacle Biocomputing | WWW: www.triacle-bc.com
>
> ------------------------------**------------------------------**---------
> To unsubscribe, e-mail: users-unsubscribe@cocoon.**apache.org<us...@cocoon.apache.org>
> For additional commands, e-mail: users-help@cocoon.apache.org
>
>
Re: [C3] Sting template, passing argument to method
Posted by André Juffer <an...@oulu.fi>.
On 10/05/2012 09:30 AM, Francesco Chicchiriccò wrote:
> On 04/10/2012 08:53, André Juffer wrote:
>> Hello,
>>
>> I am dealing with the following problem. A REST resource returns an
>> (DTO) object called statistics (of type Statistics) holding various
>> properties. With string template, each property can be inserted into
>> an XML file, like
>>
>> <A>$statistics.propertyA$</A>
>>
>> where the corresponding method on the Statistics object is
>> getPropertyA().
>>
>> One of the properties requires an argument of type String, where the
>> actual method signature is getNumberFor(String name). It returns an
>> int. The name is obtained from a list of names obtained from the
>> statistics objects as well. The idea is to iterate through the list of
>> names and return a number (int) for each name.
>>
>> Thus, the XML code that I try to complete looks like:
>> <socials>
>> $statistics.names: { name |
>> <social>
>> <name>$name$</name>
>> <number>$statistics.numberFor(name)$</tribc:number>
>> </social>
>> }$
>> </socials>
>>
>> The Statistics object holds among other things a Map<String, Integer>
>> with the requested numbers.
>>
>> The line $statistics.numberFor(name)$ is however erroneous. I cannot
>> pass the current value of name to the method in question.
>>
>> My question is now: How to pass a argument to a given method on an
>> object using string template. The string template website did not give
>> a clear answer, so maybe it is not even possible, or maybe I just
>> completely overlooked it.
>>
>> Any help is appreciated.
>
> Hi André.
> I am not an ST expert at all, but I really think there is no support for
> generic method invocation on ST expressions: the only methods supported
> seem to ne related to properties, "à la JavaBean".
Yeah, that's what I thought.
>
> For your use case, I'd change a bit the application logic by providing a
> C3 REST controller that would act as a "data conversion proxy" between
> the sitemap and the actual REST resource you are currently dealing with.
> In this way you could query the external REST resource from the C3 REST
> controller body and prepare the data in a format that's suitable for ST.
OK, I'll have a look at this. Alternatively, I may simply add a method
to the DTO that returns an XML representation of the DTO. With ST, one
would use then $statistics.asXml$ or something, but it appears that all
> and < symbols are replaced with < and > which is not what I
want of course.
Thanks,
Andre
>
> Regards.
>
--
Andre H. Juffer | Phone: +358-8-553 1161
Biocenter Oulu and | Fax: +358-8-553-1141
Department of Biochemistry | Email: andre.juffer@oulu.fi
University of Oulu, Finland | WWW: www.biochem.oulu.fi/Biocomputing/
StruBioCat | WWW: www.strubiocat.oulu.fi
Triacle Biocomputing | WWW: www.triacle-bc.com
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Re: [C3] Sting template, passing argument to method
Posted by Francesco Chicchiriccò <il...@apache.org>.
On 05/10/2012 10:59, gelo1234 wrote:
>
> Is there any reasonable benefit from using ST in "transform layer" ? I
> tend to believe that C2/C3 authors overly favor ST templates in the
> whole C architecture. Does it stem from the mere fact that ST is
> deadly simple/fast to compute (transform data) while being very
> general-purpose ? Or is there any other reason ? In my opinion ST is
> pretty exotic, i mean it is neither any valid standard, nor seen in
> any favorable (Java EE) technology stack.
>
> As this case shows, its not a valid engine for general-purpose problems.
> Im not giving here the alternatives yet, because i would like to hear
> first the reasons behind choosing ST as a preferable template engine
> in C2/C3.
AFAIK, ST is not "preferred", it's barely the only one available so far
in C3.
And I don't remember ST to be available at all in C2.1 and C2.2.
C2.1 and C.2.2 have instead a wider range of supported template engines,
including JX (my favorite) [1] [2].
If you'd like to port JX (or any other templating engine) to C3, your
contribution is more than welcome.
Best regards.
[1] http://cocoon.apache.org/2.2/blocks/template/1.0/976_1_1.html
[2] http://cocoon.apache.org/2.2/blocks/template/1.0/1012_1_1.html
> 2012/10/5 Francesco Chicchiriccò <ilgrosso@apache.org
> <ma...@apache.org>>
>
> On 04/10/2012 08:53, André Juffer wrote:
> > Hello,
> >
> > I am dealing with the following problem. A REST resource returns an
> > (DTO) object called statistics (of type Statistics) holding various
> > properties. With string template, each property can be inserted into
> > an XML file, like
> >
> > <A>$statistics.propertyA$</A>
> >
> > where the corresponding method on the Statistics object is
> > getPropertyA().
> >
> > One of the properties requires an argument of type String, where the
> > actual method signature is getNumberFor(String name). It returns an
> > int. The name is obtained from a list of names obtained from the
> > statistics objects as well. The idea is to iterate through the
> list of
> > names and return a number (int) for each name.
> >
> > Thus, the XML code that I try to complete looks like:
> > <socials>
> > $statistics.names: { name |
> > <social>
> > <name>$name$</name>
> > <number>$statistics.numberFor(name)$</tribc:number>
> > </social>
> > }$
> > </socials>
> >
> > The Statistics object holds among other things a Map<String,
> Integer>
> > with the requested numbers.
> >
> > The line $statistics.numberFor(name)$ is however erroneous. I cannot
> > pass the current value of name to the method in question.
> >
> > My question is now: How to pass a argument to a given method on an
> > object using string template. The string template website did
> not give
> > a clear answer, so maybe it is not even possible, or maybe I just
> > completely overlooked it.
> >
> > Any help is appreciated.
>
> Hi André.
> I am not an ST expert at all, but I really think there is no
> support for
> generic method invocation on ST expressions: the only methods
> supported
> seem to ne related to properties, "à la JavaBean".
>
> For your use case, I'd change a bit the application logic by
> providing a
> C3 REST controller that would act as a "data conversion proxy" between
> the sitemap and the actual REST resource you are currently dealing
> with.
> In this way you could query the external REST resource from the C3
> REST
> controller body and prepare the data in a format that's suitable
> for ST.
>
> Regards.
>
--
Francesco Chicchiriccò
ASF Member, Apache Cocoon PMC and Apache Syncope PPMC Member
http://people.apache.org/~ilgrosso/
Re: [C3] Sting template, passing argument to method
Posted by gelo1234 <ge...@gmail.com>.
Is there any reasonable benefit from using ST in "transform layer" ? I tend
to believe that C2/C3 authors overly favor ST templates in the whole C
architecture. Does it stem from the mere fact that ST is deadly simple/fast
to compute (transform data) while being very general-purpose ? Or is there
any other reason ? In my opinion ST is pretty exotic, i mean it is neither
any valid standard, nor seen in any favorable (Java EE) technology stack.
As this case shows, its not a valid engine for general-purpose problems.
Im not giving here the alternatives yet, because i would like to hear first
the reasons behind choosing ST as a preferable template engine in C2/C3.
Greetings,
Greg
2012/10/5 Francesco Chicchiriccò <il...@apache.org>
> On 04/10/2012 08:53, André Juffer wrote:
> > Hello,
> >
> > I am dealing with the following problem. A REST resource returns an
> > (DTO) object called statistics (of type Statistics) holding various
> > properties. With string template, each property can be inserted into
> > an XML file, like
> >
> > <A>$statistics.propertyA$</A>
> >
> > where the corresponding method on the Statistics object is
> > getPropertyA().
> >
> > One of the properties requires an argument of type String, where the
> > actual method signature is getNumberFor(String name). It returns an
> > int. The name is obtained from a list of names obtained from the
> > statistics objects as well. The idea is to iterate through the list of
> > names and return a number (int) for each name.
> >
> > Thus, the XML code that I try to complete looks like:
> > <socials>
> > $statistics.names: { name |
> > <social>
> > <name>$name$</name>
> > <number>$statistics.numberFor(name)$</tribc:number>
> > </social>
> > }$
> > </socials>
> >
> > The Statistics object holds among other things a Map<String, Integer>
> > with the requested numbers.
> >
> > The line $statistics.numberFor(name)$ is however erroneous. I cannot
> > pass the current value of name to the method in question.
> >
> > My question is now: How to pass a argument to a given method on an
> > object using string template. The string template website did not give
> > a clear answer, so maybe it is not even possible, or maybe I just
> > completely overlooked it.
> >
> > Any help is appreciated.
>
> Hi André.
> I am not an ST expert at all, but I really think there is no support for
> generic method invocation on ST expressions: the only methods supported
> seem to ne related to properties, "à la JavaBean".
>
> For your use case, I'd change a bit the application logic by providing a
> C3 REST controller that would act as a "data conversion proxy" between
> the sitemap and the actual REST resource you are currently dealing with.
> In this way you could query the external REST resource from the C3 REST
> controller body and prepare the data in a format that's suitable for ST.
>
> Regards.
>
> --
> Francesco Chicchiriccò
>
> ASF Member, Apache Cocoon PMC and Apache Syncope PPMC Member
> http://people.apache.org/~ilgrosso/
>
>
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> To unsubscribe, e-mail: users-unsubscribe@cocoon.apache.org
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>
>
Re: [C3] Sting template, passing argument to method
Posted by Francesco Chicchiriccò <il...@apache.org>.
On 04/10/2012 08:53, André Juffer wrote:
> Hello,
>
> I am dealing with the following problem. A REST resource returns an
> (DTO) object called statistics (of type Statistics) holding various
> properties. With string template, each property can be inserted into
> an XML file, like
>
> <A>$statistics.propertyA$</A>
>
> where the corresponding method on the Statistics object is
> getPropertyA().
>
> One of the properties requires an argument of type String, where the
> actual method signature is getNumberFor(String name). It returns an
> int. The name is obtained from a list of names obtained from the
> statistics objects as well. The idea is to iterate through the list of
> names and return a number (int) for each name.
>
> Thus, the XML code that I try to complete looks like:
> <socials>
> $statistics.names: { name |
> <social>
> <name>$name$</name>
> <number>$statistics.numberFor(name)$</tribc:number>
> </social>
> }$
> </socials>
>
> The Statistics object holds among other things a Map<String, Integer>
> with the requested numbers.
>
> The line $statistics.numberFor(name)$ is however erroneous. I cannot
> pass the current value of name to the method in question.
>
> My question is now: How to pass a argument to a given method on an
> object using string template. The string template website did not give
> a clear answer, so maybe it is not even possible, or maybe I just
> completely overlooked it.
>
> Any help is appreciated.
Hi André.
I am not an ST expert at all, but I really think there is no support for
generic method invocation on ST expressions: the only methods supported
seem to ne related to properties, "à la JavaBean".
For your use case, I'd change a bit the application logic by providing a
C3 REST controller that would act as a "data conversion proxy" between
the sitemap and the actual REST resource you are currently dealing with.
In this way you could query the external REST resource from the C3 REST
controller body and prepare the data in a format that's suitable for ST.
Regards.
--
Francesco Chicchiriccò
ASF Member, Apache Cocoon PMC and Apache Syncope PPMC Member
http://people.apache.org/~ilgrosso/
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