Stefan Burkard wrote:
> hi all
>
> is it technically possible to generate tables with displaytag that have
> a dynamic number of columns?
>
Yes absolutely. This is another example from one of my sites:
<display:table name="data" id="d" sort="list">
<c:forEach var="field" items="${report.headers}">
<display:column title="${field.value}" property="${field.key}"/>
</c:forEach>
</display:table>
> but can this work? is it guaranteed that the jstl-tag is executed before
> display-tag? can the display-tag be evaluated after it was generated by
> jstl?
>
I understand it in this way: The <display:table> code asks the jsp
processor for its body. The processor extracts the body and first thing
it sees is a <c:forEach> tag so it follows that tag's instructions, "for
Each field in the report.headers collection output a <display:column>
tag". So it
builds a collection of <display:column> tags and this is what is
returned to the <display:table> code.
So the <display:table> code never gets to see the <c:forEach> only the
results of its evaluation, a collection of <display:column> tags which
is exactly what it wants.
Ed!
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