net.agmodel.demBean
Class DEMSpatialRequestBean

java.lang.Object
  |
  +--net.agmodel.utilBean.RequestBean
        |
        +--net.agmodel.demBean.DEMSpatialRequestBean

All Implemented Interfaces:

DataSourceListener, DEMSourceListener, EventListener, MapDisplayListener, Runnable, ServiceBeanListener

public class DEMSpatialRequestBean

extends RequestBean

implements MapDisplayListener, DEMSourceListener, ServiceBeanListener

Field Summary

protected DEMSourceDetail	currentSource
protected GeographicalBox	displayRegion
protected ArrayList	sourceListeners
protected GeographicalArea	targetRegion

Fields inherited from class net.agmodel.utilBean.RequestBean

brokerHTTP, brokerRMI, dataListeners, indeterminateListeners, loginDialog, parent, rb, retrieveDataThread, sessionID, ub

Constructor Summary

DEMSpatialRequestBean(Frame parent)

Method Summary

void	addDEMSourceListener(DEMSourceListener x)
void	addSpatialDataListener(DEMSpatialDataListener x)
protected void	clearListeners()
protected void	fireSpecificEvent(RequestBeanListener listener, ServerResult result)
protected ServerResult	getData(ServerRequest request) Implemented by descendant requestBeans to call the broker to get the data.
protected ServerRequest	makeRequest() Implemented by descendant requestBeans to create an appropriate request object for this kind of broker.
void	newConnection(ServiceBeanEvent evt) Called when a ServerBean establishes a connection to a server
void	newDEMSource(DEMSourceEvent evt) If a new source is selected, and the new source covers a different area to the request bean's current request area then tell GeographicalArea listeners to move to the default display area of the new source.
void	newMapDisplay(MapDisplayEvent evt)
protected boolean	readyToRequest()
protected void	relayDEMSourceEvent(DEMSourceEvent evt)
void	removeDEMSourceListener(DEMSourceListener x)
void	removeSpatialDataListener(DEMSpatialDataListener x)
protected void	setUpBean()
protected boolean	suitableLogin(ServerRequest request) Implemented by descendant requestBeans to select which login mechanism to use.

Methods inherited from class net.agmodel.utilBean.RequestBean

addDataListener, addIndeterminateListener, alreadyLoggedIn, fireDataArrivedEvent, fireDataRequestedEvent, fireIndeterminateEvent, listSourceDetails, login, login, loginToDataSource, removeDataListener, removeIndeterminateListener, run, runRetrieveThread

Methods inherited from class java.lang.Object

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

Field Detail

currentSource

protected transient DEMSourceDetail currentSource

targetRegion

protected transient GeographicalArea targetRegion

displayRegion

protected transient GeographicalBox displayRegion

sourceListeners

protected transient ArrayList sourceListeners

Constructor Detail

DEMSpatialRequestBean

public DEMSpatialRequestBean(Frame parent)

Method Detail

clearListeners

protected void clearListeners()

Overrides:

clearListeners in class RequestBean

setUpBean

protected void setUpBean()

Overrides:

setUpBean in class RequestBean

relayDEMSourceEvent

protected void relayDEMSourceEvent(DEMSourceEvent evt)

addDEMSourceListener

public void addDEMSourceListener(DEMSourceListener x)

removeDEMSourceListener

public void removeDEMSourceListener(DEMSourceListener x)

newDEMSource

public void newDEMSource(DEMSourceEvent evt)

If a new source is selected, and the new source covers a different area to the request bean's current request area then tell GeographicalArea listeners to move to the default display area of the new source. Otherwise, send a GeographicalAreaEvent for the current request area to signal listeners to reload from the new source.

Specified by:

newDEMSource in interface DEMSourceListener

Parameters:

evt -

newMapDisplay

public void newMapDisplay(MapDisplayEvent evt)

Specified by:

newMapDisplay in interface MapDisplayListener

readyToRequest

protected boolean readyToRequest()

Overrides:

readyToRequest in class RequestBean

fireSpecificEvent

protected void fireSpecificEvent(RequestBeanListener listener,
                                 ServerResult result)

Specified by:

fireSpecificEvent in class RequestBean

addSpatialDataListener

public void addSpatialDataListener(DEMSpatialDataListener x)

removeSpatialDataListener

public void removeSpatialDataListener(DEMSpatialDataListener x)

getData

protected ServerResult getData(ServerRequest request)
                        throws RemoteException,
                               GeneralException

Description copied from class: RequestBean

Implemented by descendant requestBeans to call the broker to get the data.
These beans can use brokerRMI if the connection is RMI, or brokerHTTP if the connection is via HTTP.

Specified by:

getData in class RequestBean

Returns:

a request to be sent to the broker.

RemoteException

GeneralException

suitableLogin

protected boolean suitableLogin(ServerRequest request)
                         throws RemoteException,
                                GeneralException

Description copied from class: RequestBean

Implemented by descendant requestBeans to select which login mechanism to use.
Should either called login(GeographicalArea) or login(String), depending on whether spatial request bean or data source request bean

Specified by:

suitableLogin in class RequestBean

Returns:

true if at least one database is accessible after the logging in process.

RemoteException

GeneralException

makeRequest

protected ServerRequest makeRequest()

Description copied from class: RequestBean

Implemented by descendant requestBeans to create an appropriate request object for this kind of broker.

Specified by:

makeRequest in class RequestBean

Returns:

a request to be sent to the broker.

newConnection

public void newConnection(ServiceBeanEvent evt)

Description copied from interface: ServiceBeanListener

Called when a ServerBean establishes a connection to a server

Specified by:

newConnection in interface ServiceBeanListener

Parameters:

evt - contact details for the server.