mwalk.visitor
Class LinkCountVisitor

java.lang.Object
  |
  +--mwalk.visitor.AbstractVisitor
        |
        +--mwalk.visitor.PrintVisitor
              |
              +--mwalk.visitor.LinkCountVisitor

public class LinkCountVisitor

extends PrintVisitor

implements DownVisitor

A visitor used to count the number of links for each receiver along the active tree.

Version:

1.0

Author:

Robert Chalmers

Field Summary

private static java.lang.String

DEF_FILENAME Default file name if none supplied

Fields inherited from class mwalk.visitor.PrintVisitor

CFG_BASE, def_filename, filename, ps

Fields inherited from class mwalk.visitor.AbstractVisitor

CFG_BASE, eval, seen, verbose

Constructor Summary

LinkCountVisitor()
Default constructor.

LinkCountVisitor(java.lang.String filename)
Constructor.

Method Summary

boolean	init(Tree tree) Initialize visitor.
boolean	prefix() Whether to visit prior to visiting parent/children.
protected void	printHeader(Tree tree) Print visitor's header info at start of file.
java.lang.Object	visitDown(Tree tree, TreeNode node) Visit the current node prior to visiting children.

Methods inherited from class mwalk.visitor.PrintVisitor

getChildren, getFilename, printData, printData, setFilename

Methods inherited from class mwalk.visitor.AbstractVisitor

again, cfgBoolean, cfgInt, cfgString, cfgVisitor, evaluator, evaluator, getParents, getReceivers, haveSeen, haveVisited, markSeen, markVisited, nextReceiver, postfix, reset, verbose, visitDown, visitUp, visitUp, walkDown, walkUp

Methods inherited from class java.lang.Object

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

Field Detail

DEF_FILENAME

private static final java.lang.String DEF_FILENAME

Default file name if none supplied

Constructor Detail

LinkCountVisitor

public LinkCountVisitor()

Default constructor.

LinkCountVisitor

public LinkCountVisitor(java.lang.String filename)

Constructor.

Parameters:

String - new default filename

Method Detail

prefix

public boolean prefix()

Whether to visit prior to visiting parent/children.

Overrides:

prefix in class AbstractVisitor

Returns:

boolean whether to visit prior

printHeader

protected void printHeader(Tree tree)

Print visitor's header info at start of file.

Overrides:

printHeader in class PrintVisitor

Parameters:

Tree - current tree instance

init

public boolean init(Tree tree)

Initialize visitor.

Overrides:

init in class PrintVisitor

Parameters:

Tree - current tree instance

Returns:

boolean whether to walk again

visitDown

public java.lang.Object visitDown(Tree tree,
                                  TreeNode node)
                           throws VisitException

Visit the current node prior to visiting children. This method is called if prefix() returns true.

Specified by:

visitDown in interface DownVisitor

Overrides:

visitDown in class AbstractVisitor

Parameters:

Tree - current tree instance

TreeNode - current node

Returns:

Object optional return value to pass back along the path

Throws:

VisitException - if a problem ocurred during visit