prefuse.data.expression
Interface ExpressionVisitor

public interface ExpressionVisitor

Visitor interface for objects that visit each sub-expression of an Expression instance, performing some computation or data collection.

Author:

jeffrey heer

Method Summary

void	down() Callback to signal that the visitor has just descended a level in the Expression tree.
void	up() Callback to signal that the visitor has just ascended a level in the Expression tree.
void	visitExpression(Expression expr) Callback made when visiting a particular expression.

Method Detail

visitExpression

public void visitExpression(Expression expr)

Callback made when visiting a particular expression.

Parameters:

expr - the expression currently being visited.

down

public void down()

Callback to signal that the visitor has just descended a level in the Expression tree.

up

public void up()

Callback to signal that the visitor has just ascended a level in the Expression tree.