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java.lang.Objectnet.esper.view.ViewSupport
net.esper.view.stat.UnivariateStatisticsView
public final class UnivariateStatisticsView
View for computing statistics, which the view exposes via fields representing the sum, count, standard deviation for sample and for population and variance.
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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UnivariateStatisticsView(StatementServiceContext statementServiceContext,
String fieldName)
Constructor requires the name of the field to use in the parent view to compute the statistics. |
Method Summary | |
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View |
cloneView(StatementServiceContext statementServiceContext)
Duplicates the view. |
protected static EventType |
createEventType(StatementServiceContext statementServiceContext)
Creates the event type for this view. |
EventType |
getEventType()
Provides metadata information about the type of object the event collection contains. |
String |
getFieldName()
Returns field name of the field to report statistics on. |
Iterator<EventBean> |
iterator()
Allows iteration through all elements in this event collection. |
void |
setParent(Viewable parent)
Called when the View is added to a Viewable object. |
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, 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 UnivariateStatisticsView(StatementServiceContext statementServiceContext, String fieldName)
fieldName
- is the name of the field within the parent view to use to get numeric data points for this view to
compute the statistics on.statementServiceContext
- contains required view servicesMethod Detail |
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public View cloneView(StatementServiceContext statementServiceContext)
CloneableView
Expected to return a same view in initialized state for grouping.
cloneView
in interface CloneableView
statementServiceContext
- is services for the view
public void setParent(Viewable parent)
View
setParent
in interface View
setParent
in class ViewSupport
parent
- is the parent that this view is a child ofpublic final String getFieldName()
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 EventType getEventType()
EventCollection
getEventType
in interface EventCollection
public final Iterator<EventBean> iterator()
EventCollection
iterator
in interface Iterable<EventBean>
iterator
in interface EventCollection
public final String toString()
toString
in class Object
protected static EventType createEventType(StatementServiceContext statementServiceContext)
statementServiceContext
- is the event adapter service
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