Hello velocitians,
I experimentize a little with ParserVisitors on AST and I think the following
patch is usefull:
it allows processing the AST nodes with a visitor, until now:
template.merge( context, writer );
now:
template.merge( context, writer );
and
template.merge( context, visitor );
are avaible. I think this is a trivial change, but it is usefull ...
Christian
Index: Template.java
===================================================================
RCS file:
/home/cvspublic/jakarta-velocity/src/java/org/apache/velocity/Template.java,v
retrieving revision 1.35
diff -r1.35 Template.java
66a67
> import org.apache.velocity.runtime.parser.node.ParserVisitor;
261a263
> * @param parser visitor for rendering template
268c270
< public void merge( Context context, Writer writer)
---
> public void merge( Context context, Writer writer, ParserVisitor
visitor)
296c298,312
< ( (SimpleNode) data ).render( ica, writer);
---
> if ( visitor == null )
> {
> /*
> * standard template rendering
> */
> ( (SimpleNode) data ).render( ica, writer);
> }
> else
> {
> /*
> * render template with a visitor
> */
> visitor.visit( (SimpleNode) data, data);
> }
>
318a335,376
> }
>
> /**
> * The AST node structure is merged with the
> * context to produce the final output.
> *
> * Throws IOException if failure is due to a file related
> * issue, and Exception otherwise
> *
> * @param context Conext with data elements accessed by template
> * @param writer output writer for rendered template
> * @throws ResourceNotFoundException if template not found
> * from any available source.
> * @throws ParseErrorException if template cannot be parsed due
> * to syntax (or other) error.
> * @throws Exception anything else.
> */
> public void merge( Context context, Writer writer)
> throws ResourceNotFoundException, ParseErrorException,
MethodInvocationException, Exception
> {
> merge( context, writer, null);
> }
>
> /**
> * The AST node structure is merged with the
> * context to produce the final output.
> *
> * Throws IOException if failure is due to a file related
> * issue, and Exception otherwise
> *
> * @param context Conext with data elements accessed by template
> * @param parser visitor for rendering template
> * @throws ResourceNotFoundException if template not found
> * from any available source.
> * @throws ParseErrorException if template cannot be parsed due
> * to syntax (or other) error.
> * @throws Exception anything else.
> */
> public void merge( Context context, ParserVisitor visitor)
> throws ResourceNotFoundException, ParseErrorException,
MethodInvocationException, Exception
> {
> merge( context, null, visitor);
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