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From "Scot P. Floess" <sflo...@nc.rr.com>
Subject Re: Creating a macrodef dynamically...within beanshell or any scripting language?
Date Thu, 08 Dec 2011 19:11:16 GMT
I should mention that doing this will execute just fine as I expect:

     <scriptdef name="bshForLoop" language="beanshell">
         <classpath>
             <fileset dir="lib" includes="*.jar"/>
         </classpath>

         <attribute name="start"/>
         <attribute name="end"/>
         <attribute name="step"/>

         <element name="sequential" 
classname="org.apache.tools.ant.taskdefs.Sequential"/>

         <![CDATA[
         try {
             int    start = Integer.parseInt(attributes.get("start"));
             int    end   = Integer.parseInt(attributes.get("end"));
             int    step  = Integer.parseInt(attributes.get("step"));
             Task   body  = (Task) elements.get("sequential").get(0);

             for (int index = start; index != end; index += step) {
                 body.execute();
             }
         }

         catch(Exception e) {
             e.printStackTrace();
         }
         ]]>
     </scriptdef>

I just loose that nice macrodef-ish @{param} expansion that I get in both 
macrodef's and Ant Contrib for...

I'm completely open to not creating a macrodef on the fly if there is a 
simple way to get that param expansion working easily :)  I'm looking to 
do something like this:

<bshForLoop start="1" end="10" param="foo">
   <sequential>
     <echo message = "Here we go index is @{foo}"/>
   </sequential>
</bshForLoop>



On Thu, 8 Dec 2011, Scot P. Floess wrote:

> All,
>
> I have what may seem like a strange question...  I was looking through the 
> source for Ant Contrib's ForTask.java...  I see it uses MacroDef internally 
> as well as MacroInstance to execute().
>
> I've got a script def that has a child element entitled "sequential" of type 
> org.apache.tools.ant.taskdefs.Sequential.
>
> I was trying to mimick the ForTask within a Beanshell script.  Below is the 
> code I was writing - but it definitely doesn't execute "sequential" 
> whatsoever.  What started me on this was I liked how ForTask uses the same 
> param expansion that MacroDef uses...and wanted to see what ForTask did to 
> make that happen.  I can definitely get "sequential" to execute by itself 
> within the for loop no problem...  Here is the script def - and thanks ahead 
> of time!!!!!!!!
>
>    <scriptdef name="bshForLoop" language="beanshell">
>        <classpath>
>            <fileset dir="lib" includes="*.jar"/>
>        </classpath>
>
>        <attribute name="start"/>
>        <attribute name="end"/>
>        <attribute name="step"/>
>        <attribute name="param"/>
>
>        <element name="sequential" 
> classname="org.apache.tools.ant.taskdefs.Sequential"/>
>
>        <![CDATA[
>        try {
>            import org.apache.tools.ant.Task;
>            import org.apache.tools.ant.RuntimeConfigurable;
>            import org.apache.tools.ant.UnknownElement;
>
>            import org.apache.tools.ant.taskdefs.MacroDef;
>            import org.apache.tools.ant.taskdefs.MacroInstance;
>
>            int    start = Integer.parseInt(attributes.get("start"));
>            int    end   = Integer.parseInt(attributes.get("end"));
>            int    step  = Integer.parseInt(attributes.get("step"));
>            String param = attributes.get("param");
>            Task   body  = (Task) elements.get("sequential").get(0);
>
>            MacroDef macroDef = new MacroDef();
>            macroDef.setProject(project);
>
>            MacroDef.Attribute attribute = new MacroDef.Attribute();
>            attribute.setName(param);
>            attribute.setDefault("" + start);
>            macroDef.addConfiguredAttribute(attribute);
>
>            MacroDef.NestedSequential sequential = 
> macroDef.createSequential();
>
>            UnknownElement unknownElement = macroDef.getNestedTask();
>            unknownElement.setRealThing(body);
>            unknownElement.setProject(project);
>
>            sequential.addTask(unknownElement);
>
>            MacroInstance instance = new MacroInstance();
>            instance.setProject(project);
>            instance.setMacroDef(macroDef);
>
>            for (int index = start; index != end; index += step) {
>                instance.setDynamicAttribute(param, "" + index);
>
>                instance.execute();
>            }
>        }
>
>        catch(Exception e) {
>            e.printStackTrace();
>        }
>        ]]>
>    </scriptdef
>
> Scot P. Floess             RHCT  (Certificate Number 605010084735240)
> Chief Architect FlossWare  http://sourceforge.net/projects/flossware
>                           http://flossware.sourceforge.net
>                           https://github.com/organizations/FlossWare
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@ant.apache.org
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>
>

Scot P. Floess             RHCT  (Certificate Number 605010084735240)
Chief Architect FlossWare  http://sourceforge.net/projects/flossware
                            http://flossware.sourceforge.net
                            https://github.com/organizations/FlossWare

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