mwalk.visitor
Class PrintVisitor

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

Direct Known Subclasses:

DegreeCountVisitor, ExportVisitor, LinkCountVisitor, MetricVisitor, VisualVisitor

public abstract class PrintVisitor

extends AbstractVisitor

An abstract visitor used as a bas class for visitors wanting to print results out to a log file.

Version:

1.0

Author:

Robert Chalmers

Field Summary

private static java.lang.String	CFG_BASE Base of keys in configuration file
protected java.lang.String	def_filename Default file name if none supplied
protected java.lang.String	filename Filename to print to
protected java.io.PrintStream	ps Print stream to use for output

Fields inherited from class mwalk.visitor.AbstractVisitor

CFG_BASE, eval, seen, verbose

Constructor Summary

PrintVisitor()
Default constructor.

PrintVisitor(java.lang.String filename)
Constructor.

Method Summary

TreeNode[]	getChildren(Tree tree, TreeNode node) Get a list of children for the current node applying correct activity semantics.
java.lang.String	getFilename() Retrieve the current filename.
boolean	init(Tree tree) Initialize visitor.
void	printData(Tree tree, java.lang.String line) Print a single line of data.
void	printData(Tree tree, TreeNode node, java.lang.String line) Print a single line of data.
protected void	printHeader(Tree tree) Print visitor's header info at start of file.
void	setFilename(java.lang.String filename) Set the current filename prior to init().

Methods inherited from class mwalk.visitor.AbstractVisitor

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

ps

protected java.io.PrintStream ps

Print stream to use for output

filename

protected java.lang.String filename

Filename to print to

def_filename

protected java.lang.String def_filename

Default file name if none supplied

Constructor Detail

PrintVisitor

public PrintVisitor()

Default constructor.

PrintVisitor

public PrintVisitor(java.lang.String filename)

Constructor.

Parameters:

String - new default filename

Method Detail

getFilename

public java.lang.String getFilename()

Retrieve the current filename.

Returns:

String current filename

setFilename

public void setFilename(java.lang.String filename)

Set the current filename prior to init().

Parameters:

String - new filename

printHeader

protected void printHeader(Tree tree)

Print visitor's header info at start of file.

Parameters:

Tree - current tree instance

printData

public void printData(Tree tree,
                      TreeNode node,
                      java.lang.String line)

Print a single line of data.

Parameters:

Tree - current tree instance

TreeNode - current tree node

String - line to print

printData

public void printData(Tree tree,
                      java.lang.String line)

Print a single line of data.

Parameters:

Tree - current tree instance

String - line to print

init

public boolean init(Tree tree)

Initialize visitor.

Overrides:

init in class AbstractVisitor

Parameters:

Tree - current tree instance

Returns:

boolean whether to walk again

getChildren

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

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

Overrides:

getChildren in class AbstractVisitor

Parameters:

Tree - current tree instance

TreeNode - current node