Package net.esper.view

View infrastructure concerned with view creation and destroy, cloning and hooking views trees into filtering.

See:
Description

Interface Summary

CloneableView	Views that can work under a group-by must be able to duplicate and are required to implement this interface.
EventCollection	Interface that marks an event collection.
EventStream	A streams is a conduct for incoming events.
HistoricalEventViewable	Interface for views that poll data based on information from other streams.
InitializableView	Views that require initialization after view instantiation and after view hook-up with the parent view can impleeent this interface and get invoked to initialize.
StatementStopCallback	Callback to indicate that a statement has stopped.
StatementStopService	Provides statement resources with the means to register a callback and be informed when a statement stopped and resources for the statement must be release.
ValidatedView	Interface for views that require validation against stream event types.
View	The View interface provides a way for a stream, data provider, or another view, to notify an object of additions and deletions to its data set.
Viewable	The Viewable interface marks an object as supporting zero, one or more View instances.
ViewCapability	Interface for use by expression nodes to indicate view resource requirements allowing inspection and modification of view factories.
ViewFactory	Factory interface for a factory responsible for creating a View instance and for determining if an existing view meets requirements.
ViewResolutionService	Factory service for resolving view names and for creating view instances based on a view specification including view name and namespace.
ViewService	Service interface for creating views.

Class Summary

PropertyCheckHelper	Utility class for checking in a schema if fields exist and/or have an expected type.
StatementStopServiceImpl	Provides subscription list for statement stop callbacks.
ViewCapDataWindowAccess	Describes that we need random access into a data window by index.
ViewCapPriorEventAccess	Describes that we need access to prior events (result events published by views), for use by the "prior" expression function.
ViewEnumHelper	Helper producing a repository of built-in views.
ViewFactoryChain	Holder for the logical chain of view factories.
ViewFactoryContext	Context calss for specific views within a statement.
ViewFactorySupport	Abstract base class for view factories that do not make re-useable views and that do not share view resources with expression nodes.
ViewResolutionServiceImpl	Resolves view namespace and name to view factory class, using configuration.
ViewServiceHelper	Utility methods to deal with chains of views, and for merge/group-by views.
ViewServiceImpl	Implementation of the view evaluation service business interface.
ViewServiceProvider	Static factory for implementations of the ViewService interface.
ViewSupport	A helper class for View implementations that provides generic implementation for some of the methods.
ZeroDepthStream	Event stream implementation that does not keep any window by itself of the events coming into the stream.

Enum Summary

ViewEnum	Enum for all build-in views.
ViewFieldEnum	Enumerates the valid values for each view's public fields.

Exception Summary

ViewAttachException	Thrown to indicate a validation error in staggered views.
ViewParameterException	Thrown to indicate a validation error in view parameterization.
ViewProcessingException	This exception is thrown to indicate a problem with a view expression.

Package net.esper.view Description

View infrastructure concerned with view creation and destroy, cloning and hooking views trees into filtering.