Hi, I solved this problem like this (excerpt from my build file "do-actual-test.xml"):
1. The necessary macros (I'm using Ant 1.6.2)
----------------------------------------------------------------------------
<!--
"set varying property"
Set a generally named property whose name is available via @{propname}
to the value of a more specifically named property whose name consists
also
of @{propname}, but is prepended by a prefix, whose value is stored in
@{propprefix}
-->
<macrodef name="setvarprop">
<attribute name="propprefix" default="NOT SET" />
<attribute name="propname" default="NOT SET" />
<sequential>
<property name="@{propname}" value="[EMAIL PROTECTED]@{propname}}" />
</sequential>
</macrodef>
<!--
"set multiple varying properties"
-->
<macrodef name="setmultvarprop">
<attribute name="propprefix" default="NOT SET" />
<attribute name="propnames" default="NOT SET" />
<sequential>
<for param="currpropname"
list="@{propnames}"
delimiter=" ">
<sequential>
<setvarprop propprefix="@{propprefix}" propname="@{currpropname}"
/>
</sequential>
</for>
</sequential>
</macrodef>
------------------------------------------------------
2. The invocation and the corresponding echo lines in target "do-actual-test":
------------------------------------------------------
<property name="propnamelist" value="transformer.type
transformer.xml.input.file transformer.xsl.stylesheet
transformer.output.file transformer.xsl.stylesheet.params" />
<setmultvarprop propprefix="${config.prop.prefix}"
propnames="${propnamelist}" />
<echo message="*** transformer.type = ${transformer.type}" />
<echo message="*** transformer.xml.input.file =
${transformer.xml.input.file}" />
<echo message="*** transformer.xsl.stylesheet =
${transformer.xsl.stylesheet}" />
<echo message="*** transformer.output.file = ${transformer.output.file}"
/>
<echo message="*** transformer.xsl.stylesheet.params =
${transformer.xsl.stylesheet.params}" />
---------------------------------------------------------
Hope this is of some help.
Kind regards,
Holger
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