public ASTMulNode(int id) 
{
        super(id);
}

Parameters:

id -

 public ASTMulNode(Parser p,
    int id) 
{
        super(p, id);
}

Parameters:

p -

id -

 public Object jjtAccept(ParserVisitor visitor,
    Object data) 
{
        return visitor.visit(this, data);
}

 public Object value(InternalContextAdapter context) throws MethodInvocationException 
{
        /*
         *  get the two args
         */
        Object left = jjtGetChild(0).value( context );
        Object right = jjtGetChild(1).value( context );
        /*
         *  if either is null, lets log and bail
         */
        if (left == null || right == null)
        {
            log.error((left == null ? "Left" : "Right")
                           + " side ("
                           + jjtGetChild( (left == null? 0 : 1) ).literal()
                           + ") of multiplication operation has null value."
                           + " Operation not possible. "
                           + context.getCurrentTemplateName() + " [line " + getLine()
                           + ", column " + getColumn() + "]");
            return null;
        }
        /*
         *  convert to Number if applicable
         */
        if (left instanceof TemplateNumber)
        {
           left = ( (TemplateNumber) left).getAsNumber();
        }
        if (right instanceof TemplateNumber)
        {
           right = ( (TemplateNumber) right).getAsNumber();
        }
        /*
         *  if not a Number, not much we can do either
         */
        if ( !( left instanceof Number )  || !( right instanceof Number ))
        {
            log.error((!(left instanceof Number) ? "Left" : "Right")
                           + " side of multiplication operation is not a Number. "
                           +  context.getCurrentTemplateName() + " [line " + getLine()
                           + ", column " + getColumn() + "]");
            return null;
        }
        return MathUtils.multiply( (Number)left, (Number)right);
}

computes the product of the two args.