using dynamic declarations..

[EetieD]

Hi,

I was wondering if it is possible to use 'dynamic declarations' within ANT. Please check the example below. In the line '<echo>${value.${id}}</echo>', I would like to print a value which is dependant on the id. But for now, I cannot use this construction, because it prints '${value.${id}}' literaly. If possible, how can I use this construction anyways?  

I hope someone can help. Thanks!!

EetieD


<target name="check.numberr">
        <var name="value.3" value="3" />
        <var name="value.4" value="4" />
        <var name="id" value="3" />     <!-- now it is 3, but it can also be 4 -->

        <echo>${value.${id}}</echo> <!-- how to use this? -->
        <echo>${value.3}</echo>       <!-- this works -->
</target>

[Knuplesch, Juergen]

Maybe use propertycopy from antcontrib package.


Juergen
--
Jürgen Knuplesch                    
-----Ursprüngliche Nachricht-----
Von: EetieD [mailto:khn@...]
Gesendet: Donnerstag, 15. Oktober 2009 11:32
An: user@...
Betreff: using dynamic declarations..


Hi,

I was wondering if it is possible to use 'dynamic declarations' within ANT.
Please check the example below. In the line '<echo>${value.${id}}</echo>', I would like to print a value which is dependant on the id. But for now, I cannot use this construction, because it prints '${value.${id}}' literaly.
If possible, how can I still use this construction?  

I hope someone can help. Thanks!!

EetieD


<target name="check.numberr">
        <var name="value.3" value="3" />
        <var name="value.4" value="4" />
        <var name="id" value="3" />     <!-- now it is 3, but it can also be 4 -->

        <echo>${value.${id}}</echo> <!-- how to use this? -->
        <echo>${value.3}</echo>       <!-- this works -->
</target>
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[Stefan Bodewig]

On 2009-10-15, EetieD <khn@...> wrote:

> I was wondering if it is possible to use 'dynamic declarations' within ANT.
> Please check the example below. In the line '<echo>${value.${id}}</echo>', I
> would like to print a value which is dependant on the id.

Not in Ant 1.7.1 or earlier, except using some tricks
<http://ant.apache.org/faq.html#propertyvalue-as-name-for-property>

Once it they are ready Ant 1.8.0 and the new props Antlib will provide a
simpler way to do just that.

Stefan

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[Rebhan, Gilbert]

 

-----Original Message-----
From: EetieD [mailto:khn@...]
Sent: Thursday, October 15, 2009 11:32 AM
To: user@...
Subject: using dynamic declarations..

/*
Hi,

I was wondering if it is possible to use 'dynamic declarations' within ANT.
Please check the example below. In the line '<echo>${value.${id}}</echo>', I
would like to print a value which is dependant on the id. But for now, I
cannot use this construction, because it prints '${value.${id}}' literaly.
If possible, how can I still use this construction?  

I hope someone can help. Thanks!!

EetieD


<target name="check.numberr">
        <var name="value.3" value="3" />
        <var name="value.4" value="4" />
        <var name="id" value="3" />     <!-- now it is 3, but it can also be 4 -->

        <echo>${value.${id}}</echo> <!-- how to use this? -->
        <echo>${value.3}</echo>       <!-- this works -->
</target>
*/

a solution with AntXtras (http://jwaresoftware.org/wiki/antxtras/home) =

<!-- import AntXtras -->
<taskdef resource="org/jwaresoftware/antxtras/antlib.xml"/>
<!-- enable funcuts -->
<managefuncuts action="enable"/>

<target name="main">

  <assign var="value.3" value="foobar"/>
  <assign var="value.4" value="foobaz" />
  <!-- now it is 3, but it can also be 4 -->
  <assign var="id" value="3" />

  <echo>Should print 'foobar' => ${$var:value.${$var:id}}</echo>
  <echo>Should print 'foobaz' => ${$var:value.4}</echo>

</target>


will print =

main:
     [echo] Should print 'foobar' => foobar
     [echo] Should print 'foobaz' => foobaz
BUILD SUCCESSFUL


Regards, Gilbert

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[EetieD]

Thanks for all the replies!
(I used propertycopy, which it works perfect for me.)

Knuplesch, Juergen wrote:

Maybe use propertycopy from antcontrib package.


Juergen
--
Jürgen Knuplesch                    
-----Ursprüngliche Nachricht-----
Von: EetieD [mailto:[e-mail]]
Gesendet: Donnerstag, 15. Oktober 2009 11:32
An: [e-mail]
Betreff: using dynamic declarations..


Hi,

I was wondering if it is possible to use 'dynamic declarations' within ANT.
Please check the example below. In the line '<echo>${value.${id}}</echo>', I would like to print a value which is dependant on the id. But for now, I cannot use this construction, because it prints '${value.${id}}' literaly.
If possible, how can I still use this construction?  

I hope someone can help. Thanks!!

EetieD


<target name="check.numberr">
        <var name="value.3" value="3" />
        <var name="value.4" value="4" />
        <var name="id" value="3" />     <!-- now it is 3, but it can also be 4 -->

        <echo>${value.${id}}</echo> <!-- how to use this? -->
        <echo>${value.3}</echo>       <!-- this works -->
</target>
--
View this message in context: http://www.nabble.com/using-dynamic-declarations..-tp25905565p25905565.html
Sent from the Ant - Users mailing list archive at Nabble.com.


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[Daniel Blaukopf]

You can do this in Ant 1.7.1 without any extensions:

<property id="value.3" value="3"/>
<property id="value.4" value="4"/>
<property name="id" value="3"/>
<property name="value.id" refid="value.${id}"/>
<echo>${value.id}</echo>

I use this to set up builds for different platforms. For example,

<property id="cc.flags.arm" value="..."/>
<property id="cc.flags.x86" value="..."/>
<property id="cc.flags.mips" value="..."/>
<property name="cc.flags" refid="cc.flags.${arch}"/>

Daniel

EetieD wrote:

> Hi,
>
> I was wondering if it is possible to use 'dynamic declarations' within ANT.
> Please check the example below. In the line '<echo>${value.${id}}</echo>', I
> would like to print a value which is dependant on the id. But for now, I
> cannot use this construction, because it prints '${value.${id}}' literaly.
> If possible, how can I still use this construction?  
>
> I hope someone can help. Thanks!!
>
> EetieD
>
>
> <target name="check.numberr">
> <var name="value.3" value="3" />
> <var name="value.4" value="4" />
> <var name="id" value="3" />     <!-- now it is 3, but it can also be 4 -->
>
> <echo>${value.${id}}</echo> <!-- how to use this? -->
> <echo>${value.3}</echo>       <!-- this works -->
> </target>
>  

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