[Geotools-gt2-users] Literal strips CDATA whitespace from the Label

[Mantas I. <ma...@in...>]

Hi,

I have a requirement to build a label based on conditional expressions, but
I've faced a problem that seems to be a bug in the parser and I can't find
a way to workaround it.

I have a dataset consisting of GIVEN_NAME, SURNAME, COMPANY and
SURVEY_DATE. There can be GIVEN_NAME + SURNAME or COMPANY provided that I
need to display, so it's always eather COMPANY is null or both GIVEN_NAME
and SURNAME are nulls. The problem is that I cannot display GIVEN_NAME and
SURNAME with a whitespace inserted between two, so both attributes appears
merged. It seems that any CDATA whitespace is stripped anyway (tried with
\r\n too) and I think it's a wrong behavior. The SLD snippet I am using is
the following:

               <Label>
   <ogc:Function name="if_then_else">
                    <ogc:Function name="isNull">
<ogc:PropertyName>SURNAME</ogc:PropertyName>
                    </ogc:Function>
    <ogc:Function name="if_then_else">
<ogc:Function name="isNull">
<ogc:PropertyName>COMPANY</ogc:PropertyName>
</ogc:Function>
    <ogc:Literal>-</ogc:Literal>
<ogc:PropertyName>COMPANY</ogc:PropertyName>
</ogc:Function>
<ogc:Function name="Concatenate">
 <ogc:PropertyName>GIVEN_NAME</ogc:PropertyName>
     <ogc:Literal><![CDATA[ ]]></ogc:Literal>
 <ogc:PropertyName>SURNAME</ogc:PropertyName>
</ogc:Function>
                 </ogc:Function>
 <![CDATA[
 ]]>
<ogc:Function name="dateFormat">
                    <ogc:Literal>yyyy-MM-dd</ogc:Literal>
                    <ogc:PropertyName>SURVEY_DATE</ogc:PropertyName>
                </ogc:Function>
               </Label>

I have tracked the suspicious condition in the ExpressionDOMParser (line
211-215, version 9.0) that ignores any CDATA whitespace

                if (kid.getNodeValue().trim().length() == 0) {
                    LOGGER.finest("empty text element");

                    continue;
                }

Looking forward to any response.

Mantas