mwalk.visitor
Class VisualVisitor

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

public class VisualVisitor

extends PrintVisitor

implements DownVisitor

A visitor that outputs a data set that can be used to visualize the tree.

Version:

1.0

Author:

Robert Chalmers

Field Summary

private static java.lang.String	CFG_BASE Base of keys in configuration file
private static java.lang.String	DEF_FILENAME Default file name if none supplied
protected boolean	showIP
protected int	time
protected long[]	times

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

VisualVisitor()
Default constructor.

VisualVisitor(long[] times)

Method Summary

boolean	again(Tree tree) Check whether the visitor wants another pass over the tree.
TreeNode[]	getChildren(Tree tree, TreeNode node) Get a list of children for the current node applying correct activity semantics.
boolean	init(Tree tree) Initialize the visitor state.
boolean	prefix() Whether to visit prior to visiting parent/children.
void	reset(Tree tree) Reset the visitor for a new pass over the tree.
java.lang.Object	visitDown(Tree tree, TreeNode node) Visit the current node prior to visiting children.

Methods inherited from class mwalk.visitor.PrintVisitor

getFilename, printData, printData, printHeader, setFilename

Methods inherited from class mwalk.visitor.AbstractVisitor

cfgBoolean, cfgInt, cfgString, cfgVisitor, evaluator, evaluator, getParents, getReceivers, haveSeen, haveVisited, markSeen, markVisited, nextReceiver, postfix, 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

CFG_BASE

private static final java.lang.String CFG_BASE

Base of keys in configuration file

DEF_FILENAME

private static final java.lang.String DEF_FILENAME

Default file name if none supplied

times

protected long[] times

time

protected int time

showIP

protected boolean showIP

Constructor Detail

VisualVisitor

public VisualVisitor()

Default constructor.

VisualVisitor

public VisualVisitor(long[] times)

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

init

public boolean init(Tree tree)

Initialize the visitor state.

Overrides:

init in class PrintVisitor

Parameters:

Tree - current tree instance

Returns:

boolean whether to walk again

reset

public void reset(Tree tree)

Reset the visitor for a new pass over the tree.

Overrides:

reset in class AbstractVisitor

Parameters:

Tree - vistited tree

again

public boolean again(Tree tree)

Check whether the visitor wants another pass over the tree.

Overrides:

again in class AbstractVisitor

Parameters:

Tree - vistited tree

Returns:

boolean whether to walk again

visitDown

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

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

getChildren

public TreeNode[] getChildren(Tree tree,
                              TreeNode node)

Get a list of children for the current node applying correct activity semantics.

Specified by:

getChildren in interface DownVisitor

Overrides:

getChildren in class PrintVisitor

Parameters:

Tree - current tree instance

TreeNode - current node

Returns:

TreeNode[] list of active children nodes