| java.lang.Object
 net.sourceforge.groboutils.util.classes.v1.AbstractSingleStore
All known Subclasses: net.sourceforge.groboutils.util.classes.v1.SingletonStore,
| AbstractSingleStore | | abstract public class AbstractSingleStore (Code) | | Aids pluggable factories and related classes by being a central repository
for storing a singleton, and creating means to load and change the singleton.
author:
Matt Albrecht groboclown@users.sourceforge.net
version:
$Date: 2003/02/10 22:52:36 $
since:
March 30, 2002 |
| Constructor Summary | |
| public | AbstractSingleStore(Class instanceOf)
Constructor specifying all the parameters for using a singleton in this
framework. |
| Method Summary | |
| protected static Object | createFromProperty(String key, Class defaultClass)
Helper method to load an object from the class specified in the given
system property; if the class is invalid, then the given default
class will be used instead. | | public Object | getSingleton()
Returns the current inner singleton. | | abstract protected void | setDefaultSingleton()
Sets the inner singleton to the default, which is an implementation
specific method. | | public synchronized void | setSingleton(Object singleton)
Sets the singleton. |
| AbstractSingleStore | | public AbstractSingleStore(Class instanceOf)(Code) | | Constructor specifying all the parameters for using a singleton in this
framework.
Parameters:
instanceOf - singletons must be of this class. |
| createFromProperty | | protected static Object createFromProperty(String key, Class defaultClass)(Code) | | Helper method to load an object from the class specified in the given
system property; if the class is invalid, then the given default
class will be used instead. No cast testing is performed.
Parameters:
key - the System property to reference for the classname toinstantiate. It is passed to ClassLoadHelper.
Parameters:
defaultClass - class to instantiate if the class defined in thesystem property is invalid. the generated object.
exception:
IllegalArgumentException - if key is null.
See Also: ClassLoadHelper.createObjectFromProperty(StringClassboolean) |
| getSingleton | | public Object getSingleton()(Code) | | Returns the current inner singleton. If it has never been set, then
the default will be used instead.
the inner singleton instance.
exception:
IllegalStateException - if no singleton was created. |
| setDefaultSingleton | | abstract protected void setDefaultSingleton()(Code) | | Sets the inner singleton to the default, which is an implementation
specific method.
|
| setSingleton | | public synchronized void setSingleton(Object singleton)(Code) | | Sets the singleton. It must be of the correct class, and non-null.
Parameters:
singleton - the singleton to set.
exception:
IllegalArgumentException - if singleton isnull, or is not of the correct type. |
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