Package ptolemy.kernel.util

Kernel utility classes.

Since:

Ptolemy II 3.1

Interface Summary

Interface	Description
Changeable	This is an interface for objects that support change requests that can be deferred.
ChangeListener	A ChangeListener is an interface implemented by objects that are interested in being kept informed about changes in a model as they are executed.
Configurable	Objects that can be configured by reading a file or configuration information given as text, typically in XML format, should implement this interface.
DebugEvent	An interface for events that can be used for debugging.
Debuggable	This is an interface for objects that debug listeners can be attached to.
DebugListener	Interface for listeners that receive debug messages.
Decorator	A decorator is a class that decorates other instances of NamedObj with extra attributes that are specific to both the decorator and the NamedObj.
Derivable	This interface is for objects that can be derived.
DropTargetHandler	An interface to be implemented by the entities that specifically handle drag-and-drop events.
ExceptionHandler	Interface for exception handlers.
Flowable	An interface for objects that have one port that serves as an input and one that serves as an output.
HierarchyListener	Interface for objects that need to be notified of hierarchy changes above them.
IconAttribute	A marker interface for an attribute that describes an icon.
Instantiable	This interface is for objects that can be instantiated.
LazyComposite	A marker interface for lazy composites.
Locatable	An interface for objects storing a location.
ModelErrorHandler	Interface for model error handlers.
MoMLExportable	This is an interface for objects that have persistent MoML representations.
Moveable	This is an interface for objects that can be moved in a list of objects in a container.
Nameable	This is an interface for objects with a name and a container.
ScopeExtender	An interface for attributes that extend their container's scope.
Settable	This is an interface for attributes that can have their values externally set.
Singleton	This interface is used to indicate that an attribute is a singleton, meaning that when setContainer() is called, if there is a previous instance of the attribute, then that previous instance is removed.
ValueListener	This is an interface for listeners that are notified when the value of an object implementing Settable changes.

Class Summary

Class	Description
AbstractSettableAttribute	This is an abstract base class for attributes that implement the Settable interface.
Attribute	Attribute is a base class for attributes to be attached to instances of NamedObj.
BasicModelErrorHandler	Default model error handler.
ChangeRequest	Abstract base class for change requests.
ConfigurableAttribute	This class provides a simple way to get a long string into an attribute.
CrossRefList	CrossRefList is a list that maintains pointers to other CrossRefLists.
DecoratorAttributes	A container for attributes created by a decorator.
Location	An attribute that represents the center location of a node in a schematic.
LoggerListener	A debug listener that sends messages using Java's Logger API.
NamedList	An ordered list of objects with names.
NamedObj	This is a base class for almost all Ptolemy II objects.
PtolemyThread	PtolemyThread PtolemyThread extends Thread by adding rudimentary debugging capability.
RecorderListener	A debug listener that records messages in a string buffer.
Settable.Visibility	Inner class used for the static enumeration of indicators of visibility.
SingletonAttribute	This class is an attribute that replaces any previously existing attribute in the container that has the same name.
SingletonConfigurableAttribute	This class is a configurable attribute that replaces any previously existing attribute in the container that has the same name.
StreamChangeListener	A change listener that describes the changes on the standard output.
StreamListener	A debug listener that sends messages to a stream or to the standard output.
StringAttribute	An attribute that has a string value.
TransientSingletonConfigurableAttribute	Deprecated. Use SingletonConfigurableAttribute instead with setPersistent(false).
Workspace	An instance of Workspace is used for synchronization and version tracking of interdependent groups of objects.

Exception Summary

Exception	Description
IllegalActionException	Thrown on an attempt to perform an action that would result in an inconsistent or contradictory data structure if it were allowed to complete.
InternalErrorException	This exception should be thrown if an unexpected error is encountered other than one for which InvalidStateException would be appropriate.
InvalidStateException	Some object or set of objects has a state that is not permitted.
KernelException	Base class for Ptolemy exceptions.
KernelRuntimeException	Base class for runtime exceptions.
NameDuplicationException	Thrown on an attempt to add a named object to a collection that requires unique names, and finding that there already is an object by that name in the collection.
NoSuchItemException	Thrown on access (by name) to an item that doesn't exist.