[JEXL-198] JxltEngine Template deos not expose pragmas

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.0, 3.1
• Fix Version/s: 3.1

Environment

any

• Assignee: Henri Biestro
• Reporter: Terefang Verigorn
• Created: 06/Jun/16 15:07
• Updated: 29/Jun/21 06:59
• Resolved: 09/Jun/16 20:32

Description

JexlScript objects have a getPragmas() method which is awesome useful to communicate static information after compilation/parsing but before evaluation.

JxltEngine.Template objects lack that method.

usage case: JexlServlet vs JexlTemplateServlet

JexlServlet/output-csv.jxp:

#pragma output-charset "UTF-8"
#pragma output-content-type "text/csv"

_out.println("col1;col2;col3;col4;col5");

for(row : _data)
{
_out.print(row.col1+";");
_out.print(row.col2+";");
_out.print(row.col3+";");
_out.print(row.col4+";");
_out.println(row.col5);
}

JexlTemplateServlet/output-csv.jxt:

$$ #pragma output-charset "UTF-8"
$$ #pragma output-content-type "text/csv"
col1;col2;col3;col4;col5
$$ for(row : _data) {
${row.col1};${row.col2};${row.col3};${row.col4};${row.col5}
$$ }

but since we cant get the pragmas from the template we have to write;

$$ http_response.setCharset("UTF-8");
$$ http_response.setContentType("text/csv");
col1;col2;col3;col4;col5
$$ for(row : _data) {
${row.col1};${row.col2};${row.col3};${row.col4};${row.col5}
$$ }

The actual case is that the templating engine cant be used "technology agnostic", as we might want to use the same script for both http and mail (or sms, xmpp, etc) formatting