I have no useful thing to say about your particular problem with this
s:component tag, but if you are rendering JSP pages, then you may well
find it more compelling to create a custom tag file, hence avoiding
the Freemarker scripts.

2009/12/23 Vitor E. Silva Souza <vitorso...@gmail.com>:
> Hello all,
>
> I'm creating a UI Component with Struts 2.1.8.1. The FreeMarker variable
> parameters seems to be made available as String and not as Hash as I expected
> (and according to [1]).
>
> [1] = http://www.vitarara.org/cms/struts_2_cookbook/creating_a_ui_component
>
> In the web page, I have something like this:
>
>  <s:component template="book-list.ftl" >
>    <s:param name="deletecolumn" value="true" />
>  </s:component>
>
> And in the file template/xhtml/book-list.ftl (in the source folder) I have a
> component that shows a table with the list of books in the database:
>
>  <#if books?size == 0>
>    <p><@s.text name="noBooks" /></p>
>  <#else>
>    <table align="center" size="90%">
>    <tr>
>      <th><@s.text name="name" /></th>
>      <th><@s.text name="authors" /></th>
>
>      <#if parameters?contains("deletecolumn=true")>
>        <th>&nbsp;</th>
>      </#if>
>    </tr>
>    <#list books as book>
>      <tr>
>        <td>${book.name}</td>
>        <td>${book.authors}</td>
>
>        <#if parameters?contains("deletecolumn=true")>
>          <td>[... delete button ...]</td>
>        </#if>
>
>      </tr>
>    </#list>
>    </table>
>  </#if>
>
>
> I expected to have to use it like this, as a hash (or something like it):
>
> <#if parameters.deletecolumn == "true">
>
> And instead, the only way it works is as above, as a string:
>
> <#if parameters?contains("deletecolumn=true")>
>
> If I use it as hash, it gives me ArrayIndexOutOfBoundsException: -1.
>
> Any thoughts?
>
> Thanks in advance,
>
> Vitor Souza
>
>
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