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java.lang.Objectnet.esper.view.ViewSupport
net.esper.view.window.LengthWindowView
public final class LengthWindowView
This view is a moving window extending the specified number of elements into the past.
Field Summary |
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Fields inherited from class net.esper.view.ViewSupport |
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parent |
Constructor Summary | |
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LengthWindowView(LengthWindowViewFactory lengthWindowViewFactory,
int size,
ViewUpdatedCollection viewUpdatedCollection)
Constructor creates a moving window extending the specified number of elements into the past. |
Method Summary | |
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View |
cloneView(StatementContext statementContext)
Duplicates the view. |
EventType |
getEventType()
Provides metadata information about the type of object the event collection contains. |
int |
getSize()
Returns the size of the length window. |
ViewUpdatedCollection |
getViewUpdatedCollection()
Returns the (optional) collection handling random access to window contents for prior or previous events. |
boolean |
isEmpty()
Returns true if the window is empty, or false if not empty. |
Iterator<EventBean> |
iterator()
Allows iteration through all elements in this event collection. |
String |
toString()
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void |
update(EventBean[] newData,
EventBean[] oldData)
Notify that data has been added or removed from the Viewable parent. |
Methods inherited from class net.esper.view.ViewSupport |
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addView, dumpChildViews, dumpUpdateParams, findDescendent, getParent, getViews, hasViews, removeView, setParent, updateChildren, updateChildren |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Methods inherited from interface net.esper.view.View |
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getParent, setParent |
Methods inherited from interface net.esper.view.Viewable |
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addView, getViews, hasViews, removeView |
Constructor Detail |
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public LengthWindowView(LengthWindowViewFactory lengthWindowViewFactory, int size, ViewUpdatedCollection viewUpdatedCollection)
size
- is the specified number of elements into the pastviewUpdatedCollection
- is a collection that the view must update when receiving eventslengthWindowViewFactory
- for copying this view in a group-byMethod Detail |
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public View cloneView(StatementContext statementContext)
CloneableView
Expected to return a same view in initialized state for grouping.
cloneView
in interface CloneableView
statementContext
- is services for the view
public boolean isEmpty()
public final int getSize()
public ViewUpdatedCollection getViewUpdatedCollection()
public final EventType getEventType()
EventCollection
getEventType
in interface EventCollection
public final void update(EventBean[] newData, EventBean[] oldData)
View
update
in interface View
newData
- is the new data that has been added to the parent viewoldData
- is the old data that has been removed from the parent viewpublic final Iterator<EventBean> iterator()
EventCollection
iterator
in interface Iterable<EventBean>
iterator
in interface EventCollection
public final String toString()
toString
in class Object
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