A visitor class for visiting the node. This class also provides the
default action (i.e. nop) for each of the child class of the Node.
An actual visitor should extend this class and supply the visit
method for the nodes that it cares.
doVisit
protected void doVisit(org.apache.jasper.compiler.Node n)
throws JasperException
This method provides a place to put actions that are common to
all nodes. Override this in the child visitor class if need to.
visitBody
protected void visitBody(org.apache.jasper.compiler.Node n)
throws JasperException
Visit the body of a node, using the current visitor