org.apache.openjpa.kernel.exps
Interface ExpressionVisitor

All Known Implementing Classes:

AbstractExpressionVisitor, HasContainsExpressionVisitor

public interface ExpressionVisitor

Visits nodes of a query expression tree.

Author:

Abe White

Method Summary

void	enter(Expression exp) Enter an expression.
void	enter(Value val) Enter a value.
void	exit(Expression exp) Leave an expression.
void	exit(Value val) Leave a value.

Method Detail

enter

void enter(Expression exp)

Enter an expression. The expression will then invoke visits on its components.

exit

void exit(Expression exp)

Leave an expression.

enter

void enter(Value val)

Enter a value. The value will then invoke visits on its components.

exit

void exit(Value val)

Leave a value.