Opus5
Class PreOrder

java.lang.Object
  |
  +--Opus5.AbstractPrePostVisitor
        |
        +--Opus5.PreOrder

All Implemented Interfaces:

PrePostVisitor

public class PreOrder

extends AbstractPrePostVisitor

Adapter to convert a Visitor to a PrePostVisitor. Used in conjunction with various depth-first traversal routines to implement preorder traversal.

Version:

$Id: PreOrder.java,v 3.2 1998/07/28 13:59:19 brpreiss Exp $

Author:

Bruno R. Preiss, P.Eng.

See Also:

Tree.depthFirstTraversal(Opus5.PrePostVisitor), Graph.depthFirstTraversal(Opus5.PrePostVisitor, int)

Field Summary

protected Visitor

visitor A visitor.

Fields inherited from interface Opus5.PrePostVisitor

copyright

Constructor Summary

PreOrder(Visitor visitor)
Constructs a PreOrder visitor using the specified visitor.

Method Summary

boolean	isDone() Invokes the isDone method on the visitor to which the the visitor field refers.
void	preVisit(java.lang.Object object) Invokes the visit method on the visitor to which the the visitor field refers using the specified object.

Methods inherited from class Opus5.AbstractPrePostVisitor

inVisit, postVisit

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

visitor

protected Visitor visitor

A visitor.

Constructor Detail

PreOrder

public PreOrder(Visitor visitor)

Constructs a PreOrder visitor using the specified visitor.

Parameters:

visitor - The visitor to adapt.

Method Detail

preVisit

public void preVisit(java.lang.Object object)

Invokes the visit method on the visitor to which the the visitor field refers using the specified object.

Overrides:

preVisit in class AbstractPrePostVisitor

Parameters:

object - The object to visit.

isDone

public boolean isDone()

Invokes the isDone method on the visitor to which the the visitor field refers.

Overrides:

isDone in class AbstractPrePostVisitor

Returns:

True if the visitor is done.