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java.lang.Objectnet.esper.view.ViewSupport
net.esper.view.std.SizeView
public final class SizeView
This view is a very simple view presenting the number of elements in a stream or view. The view computes a single long-typed count of the number of events passed through it similar to the base statistics COUNT column.
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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SizeView()
Constructor. |
Method Summary | |
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java.lang.String |
attachesTo(Viewable parentView)
Return null if the view will accept being attached to a particular object. |
EventType |
getEventType()
Provides metadata information about the type of object the event collection contains. |
ViewServiceContext |
getViewServiceContext()
Returns the context instances used by the view. |
java.util.Iterator<EventBean> |
iterator()
Allows iteration through all elements in this event collection. |
void |
setViewServiceContext(ViewServiceContext viewServiceContext)
Set the services context containing service handles. |
java.lang.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, shallowCopyView, updateChildren, updateChildren |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public SizeView()
Method Detail |
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public ViewServiceContext getViewServiceContext()
ContextAwareView
getViewServiceContext
in interface ContextAwareView
public void setViewServiceContext(ViewServiceContext viewServiceContext)
ContextAwareView
setViewServiceContext
in interface ContextAwareView
viewServiceContext
- with service handlespublic final java.lang.String attachesTo(Viewable parentView)
View
attachesTo
in interface View
parentView
- is the potential parent for this view
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 java.util.Iterator<EventBean> iterator()
EventCollection
iterator
in interface java.lang.Iterable<EventBean>
iterator
in interface EventCollection
public final java.lang.String toString()
toString
in class java.lang.Object
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