mwalk.core
Class Link

java.lang.Object
  |
  +--mwalk.core.Link

public class Link

extends java.lang.Object

implements java.io.Serializable

A class representing a link between a parent and a child node.

Version:

1.0

Author:

Robert Chalmers

See Also:

Serialized Form

Field Summary

boolean	active Flag indicating time-independent link activity
PeriodTable	activity Table of active periods for this link
java.util.Hashtable	data Storage available to visitors to store partial results
TreeNode	node Child node on other end of link
boolean	primary Flag indicating primary links
(package private) static long	serialVersionUID Serial version ID

Constructor Summary

Link(TreeNode node)
Constructor.

Method Summary

long	activate(long time, long next) Mark the link as active for a duration between two timestamps.
void	clearData() Clear activity table and stored data.
long	deactivate(long time) Mark the link as inactive starting at the passed timestamp.
boolean	isActive() Check whether link is explicitly marked active.
boolean	isActive(long time) Check whether the link is active for a given timestamp.
boolean	isPrimary() Check whether link is marked primary.
private void	readObject(java.io.ObjectInputStream in) Initialize transient variables after reading the object in.

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

static final long serialVersionUID

Serial version ID

node

public TreeNode node

Child node on other end of link

activity

public PeriodTable activity

Table of active periods for this link

primary

public transient boolean primary

Flag indicating primary links

active

public transient boolean active

Flag indicating time-independent link activity

data

public transient java.util.Hashtable data

Storage available to visitors to store partial results

Constructor Detail

Link

public Link(TreeNode node)

Constructor.

Parameters:

TreeNode - node on other end of link

Method Detail

isPrimary

public boolean isPrimary()

Check whether link is marked primary.

Returns:

boolean whether link is primary

isActive

public boolean isActive()

Check whether link is explicitly marked active.

Returns:

boolean whether link is active

isActive

public boolean isActive(long time)

Check whether the link is active for a given timestamp.

Parameters:

long - session timestamp

activate

public long activate(long time,
                     long next)

Mark the link as active for a duration between two timestamps.

Parameters:

long - session timestamp

deactivate

public long deactivate(long time)

Mark the link as inactive starting at the passed timestamp.

Parameters:

long - session timestamp

clearData

public void clearData()

Clear activity table and stored data.

readObject

private void readObject(java.io.ObjectInputStream in)
                 throws java.io.IOException,
                        java.lang.ClassNotFoundException

Initialize transient variables after reading the object in.

Parameters:

ObjectInputStream - input stream

Throws:

IOException - if object not read correctly