create java code to transform ANTLR tree to XML

I have a Gramar file for ANTLR. I need a programer that create a simple code to transform the input legacy data to XML. So. The gramar is ready. I provide a sample input info and a sample xml/dtd files. I include: - AeroMexico.g : ANTLR grammar file. - [login to view URL] : ANTLR tree representation - [login to view URL] sample input data file - [login to view URL] sample xml output file - [login to view URL] DTD file. I need: - Java program (source included) that process input file and output a XML file, according ANTLR grammar. This is a trivial simple task for an experienced ANTLR programmer.