cgl.narada.topology.viewer
Class NodeManagement

java.lang.Object
  cgl.narada.topology.viewer.NodeManagement

public class NodeManagement
extends Object

This class encapsulates all the activities that happen on the nodes. It is responsible for addition of a new node, deletion of an existing node, addition of a link, deletion of a link, zooming, recentering, drawing whole picture on screen etc.

Field Summary

List	deletedNodes
static int	INVALID_VALUE
LinkManagement	linkManagement
VirtualNode	virtualNode
double	ZOOM_IN_FACTOR
double	ZOOM_OUT_FACTOR

Constructor Summary

NodeManagement()
Only constructor

Method Summary

void	addClientToNode(String nodeAddress, int clientId, String clientType)
void	addLink(String nodeAddress1, String nodeAddress2, int linkId, String linkType) Adds a single link into the system.
void	addNode(String nodeAddress) Adds a node into the system.
void	addTopicToClient(String nodeAddress, int clientId, String type)
void	deleteAllClients(String nodeAddress)
void	deleteAllTopicsFromNode(String nodeAddress, int clientId, String topic)
void	deleteClientFromNode(String nodeAddress, int clientId)
void	deleteLink(String nodeAddress1, String nodeAddress2, int linkId) Deletes a particular link from the system.
void	deleteNode(String nodeAddress) Deletes a node into the system.
void	deleteTopicFromClient(String nodeAddress, int clientId, String topic)
void	drawView() Draws the screen view.
List	getAllClientsForNode(Node n)
String	getCountInformation() Returns count information consisting of node counts and link count.
Node	getNodeAtParticularCoordinates(int x, int y) Returns Node object closest to specified coordinates.
List	getSnapShot(List allLinks)
void	recenter(int newCenterX, int newCenterY, int screenCenterX, int screenCenterY) Translates the view.
void	setGraphics(Graphics g)
void	setInitialPositions(int centerX, int centerY, int limitX1, int limitY1, int limitX2, int limitY2) Sets Initial positions for the view.
void	setZoomInFactor(int zoomInFactor) Sets ZOOM_IN_FACTOR
void	setZoomOutFactor(int zoomOutFactor) Sets ZOOM_OUT_FACTOR
void	zoomIn(int screenCenterX, int screenCenterY) zooms into the picture.
void	zoomOut(int screenCenterX, int screenCenterY) zooms out from the picture.

Methods inherited from class java.lang.Object

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

Field Detail

INVALID_VALUE

public static int INVALID_VALUE

ZOOM_IN_FACTOR

public double ZOOM_IN_FACTOR

ZOOM_OUT_FACTOR

public double ZOOM_OUT_FACTOR

virtualNode

public VirtualNode virtualNode

linkManagement

public LinkManagement linkManagement

deletedNodes

public List deletedNodes

Constructor Detail

NodeManagement

public NodeManagement()

Only constructor

Method Detail

setInitialPositions

public void setInitialPositions(int centerX,
                                int centerY,
                                int limitX1,
                                int limitY1,
                                int limitX2,
                                int limitY2)

Sets Initial positions for the view.

Parameters:

centerX - X-coordinate of the center of the screen.

centerY - Y-coordinate of the center of the screen.

limitX1 - lower limit for X-coordinate

limitY1 - lower limit for Y-coordinate

limitX2 - upper limit for X-coordinate

limitY2 - upper limit for Y-coordinate

setGraphics

public void setGraphics(Graphics g)

addNode

public void addNode(String nodeAddress)

Adds a node into the system.

Parameters:

nodeAddress - String representation of the node address.

deleteNode

public void deleteNode(String nodeAddress)

Deletes a node into the system.

Parameters:

nodeAddress - String representation of the node address.

addLink

public void addLink(String nodeAddress1,
                    String nodeAddress2,
                    int linkId,
                    String linkType)
             throws TopologyException

Adds a single link into the system.

Parameters:

nodeAddress1 - address of one end node.

nodeAddress2 - address of other end node.

linkId - id of a link to be inserted.

linkType - String representing the link type.

Throws:

TopologyException - if one of the end nodes is absent while insertion

deleteLink

public void deleteLink(String nodeAddress1,
                       String nodeAddress2,
                       int linkId)

Deletes a particular link from the system.

Parameters:

nodeAddress1 - address of one end node.

nodeAddress2 - address of other end node.

linkId - id of a link to be deleted.

addClientToNode

public void addClientToNode(String nodeAddress,
                            int clientId,
                            String clientType)

deleteClientFromNode

public void deleteClientFromNode(String nodeAddress,
                                 int clientId)

deleteAllClients

public void deleteAllClients(String nodeAddress)

addTopicToClient

public void addTopicToClient(String nodeAddress,
                             int clientId,
                             String type)

deleteTopicFromClient

public void deleteTopicFromClient(String nodeAddress,
                                  int clientId,
                                  String topic)

deleteAllTopicsFromNode

public void deleteAllTopicsFromNode(String nodeAddress,
                                    int clientId,
                                    String topic)

getAllClientsForNode

public List getAllClientsForNode(Node n)

getCountInformation

public String getCountInformation()

Returns count information consisting of node counts and link count.

Returns:

String representing all the counts in system.

getSnapShot

public List getSnapShot(List allLinks)

getNodeAtParticularCoordinates

public Node getNodeAtParticularCoordinates(int x,
                                           int y)

Returns Node object closest to specified coordinates.

Parameters:

x - X-coordinate of mouse pointer.

y - Y-coordinate of mouse pointer.

Returns:

Node

drawView

public void drawView()

Draws the screen view. First draws all the nodes and then links.

setZoomInFactor

public void setZoomInFactor(int zoomInFactor)

Sets ZOOM_IN_FACTOR

Parameters:

zoomInFactor -

setZoomOutFactor

public void setZoomOutFactor(int zoomOutFactor)

Sets ZOOM_OUT_FACTOR

Parameters:

zoomOutFactor -

zoomIn

public void zoomIn(int screenCenterX,
                   int screenCenterY)

zooms into the picture. Modifies center and radius of virtualNode. Repositions all the components.

Parameters:

screenCenterX - X-coordinate of center of the screen.

screenCenterY - Y-coordinate of the center of the screen.

zoomOut

public void zoomOut(int screenCenterX,
                    int screenCenterY)

zooms out from the picture. Modifies center and radius of virtualNode. Repositions all the components.

Parameters:

screenCenterX - X-coordinate of center of the screen.

screenCenterY - Y-coordinate of the center of the screen.

recenter

public void recenter(int newCenterX,
                     int newCenterY,
                     int screenCenterX,
                     int screenCenterY)

Translates the view. New center becomes the location where mouse is clicked. It changes center of a virtualNode and repositions all the components in the system.

Parameters:

newCenterX - X-coordinate of a new center for the view.

newCenterY - Y-coordinate of a new center for the view.

screenCenterX - X-coordinate of a screen center.

screenCenterY - Y-coordinate of a screen center.