edu.ucsb.nceas.morpho.plugins
Class ServiceController
java.lang.Object
|
+--edu.ucsb.nceas.morpho.plugins.ServiceController
- public class ServiceController
- extends java.lang.Object
The ServiceController handles the registration of services and service lookup
for other objects. This is a singleton class because only one instance is
ever needed. Plugins that need to utilize a service should call
getServiceProvider(). The single instance of ServiceController can be
obtained statically using getInstance().
- Author:
- jones
Method Summary |
void |
addService(java.lang.Class serviceInterface,
ServiceProvider provider)
This method is called by plugins to register a particular service that
the plugin can perform. |
boolean |
checkForService(java.lang.Class serviceInterface)
This method is called by plugins to determine if a particular service has
been registered and is available. |
static ServiceController |
getInstance()
Get the single instance of the ServiceController, creating it if needed. |
ServiceProvider |
getServiceProvider(java.lang.Class serviceInterface)
This method is called by plugins to get a reference to an object that
implements a particular interface |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
getInstance
public static ServiceController getInstance()
- Get the single instance of the ServiceController, creating it if needed.
- Returns:
- the single instance of the ServiceController
getServiceProvider
public ServiceProvider getServiceProvider(java.lang.Class serviceInterface)
throws ServiceNotHandledException
- This method is called by plugins to get a reference to an object that
implements a particular interface
- Parameters:
serviceInterface
- the service interface desired- Returns:
- ServiceProvider a reference to the object providing the service
- Throws:
ServiceNotHandledException
- Description of Exception
addService
public void addService(java.lang.Class serviceInterface,
ServiceProvider provider)
throws ServiceExistsException
- This method is called by plugins to register a particular service that
the plugin can perform. The service is identified by the class of an
interface that the service implements.
- Parameters:
serviceInterface
- the interface representing this serviceprovider
- a reference to the object providing the service- Throws:
ServiceExistsException
-
checkForService
public boolean checkForService(java.lang.Class serviceInterface)
- This method is called by plugins to determine if a particular service has
been registered and is available.
- Parameters:
serviceInterface
- the service interface desired- Returns:
- boolean true if the service exists, false otherwise
Copyright © 2000 National Center for Ecological Analysis and Synthesis. All Rights Reserved.