use JavaCC to format my input file; how to handle comments?

Question

I'm parsing SQL using the excellen JSQLParser library, which uses JavaCC internally.

The grammar consists of TOKENs and SPECIAL_TOKENs. The latter is used to remove the single and multi-line comments from the token stream before the parser is called, like this:

SPECIAL_TOKEN:
{
   < LINE_COMMENT: ("--" | "//") (~["\r","\n"])*>
|  < MULTI_LINE_COMMENT: "/*" (~["*"])* "*" ("*" | (~["*","/"] (~["*"])* "*"))* "/">
}

I can use the AST to find all the SPECIAL_TOKENS by just using .next on the root node and resulting nodes, but then I lose the structure. This gives me just the contents without the parse-context.

I would like to use the context to implement a code-formatter.

My example:

                -- 1. this is 
                -- 2. an example 

                SELECT * /* All cols */  FROM aap -- two
                   JOIN b ON a.c=d.c
                   WHERE /* inline comment */ true
                -- an example
               ;

I want it to be formatted somewhat like this:

                -- 1. this is 
                -- 2. an example 

                SELECT 
                    * /* All cols */  
                FROM 
                    aap -- two
                JOIN 
                    b ON a.c=d.c
                WHERE /* inline comment */ true
                -- an example
                ;

What is the correct approach using javacc?