org.apache.tapestry5.internal.services
Class ApplicationStateManagerImpl

java.lang.Object
  org.apache.tapestry5.internal.services.ApplicationStateManagerImpl

All Implemented Interfaces:

ApplicationStateManager

public class ApplicationStateManagerImpl
extends Object
implements ApplicationStateManager

Constructor Summary

ApplicationStateManagerImpl(Map<Class,ApplicationStateContribution> configuration, ApplicationStatePersistenceStrategySource source, ObjectLocator locator)

Method Summary

<T> boolean	exists(Class<T> ssoClass) Returns true if the SSO already exists, false if it has not yet been created.
<T> T	get(Class<T> ssoClass) For a given class, find the SSO for the class, creating it if necessary.
<T> T	getIfExists(Class<T> ssoClass) For a given class, find the SSO for the class.
<T> void	set(Class<T> ssoClass, T sso) Stores a new SSO, replacing the existing SSO (if any).

Methods inherited from class java.lang.Object

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

Constructor Detail

ApplicationStateManagerImpl

public ApplicationStateManagerImpl(Map<Class,ApplicationStateContribution> configuration,
                                   ApplicationStatePersistenceStrategySource source,
                                   ObjectLocator locator)

Method Detail

get

public <T> T get(Class<T> ssoClass)

Description copied from interface: ApplicationStateManager

For a given class, find the SSO for the class, creating it if necessary. The manager has a configuration that determines how an instance is stored and created as needed. The default (when there is no configuration for a SSO type) is to instantiate the object with injected dependencies, via ObjectLocator.autobuild(Class). This allows an SSO to keep references to Tapestry IoC services or other objects that can be injected.

Specified by:

get in interface ApplicationStateManager

Parameters:

ssoClass - identifies the SSO to access or create

Returns:

the SSO instance

getIfExists

public <T> T getIfExists(Class<T> ssoClass)

Description copied from interface: ApplicationStateManager

For a given class, find the SSO for the class. The manager has a configuration that determines how an instance is stored.

Specified by:

getIfExists in interface ApplicationStateManager

Parameters:

ssoClass - identifies the SSO to access or create

Returns:

the SSO instance or null if it does not already exist

set

public <T> void set(Class<T> ssoClass,
                    T sso)

Description copied from interface: ApplicationStateManager

Stores a new SSO, replacing the existing SSO (if any). Storing the value null will delete the SSO so that it may be re-created later.

Specified by:

set in interface ApplicationStateManager

Parameters:

ssoClass - the type of SSO

sso - the SSO instance

exists

public <T> boolean exists(Class<T> ssoClass)

Description copied from interface: ApplicationStateManager

Returns true if the SSO already exists, false if it has not yet been created.

Specified by:

exists in interface ApplicationStateManager

Parameters:

ssoClass - used to select the SSO

Returns:

true if SSO exists, false if null