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java.lang.Objectcom.espertech.esper.view.ViewSupport
com.espertech.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 com.espertech.esper.view.ViewSupport |
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parent |
Constructor Summary | |
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UnivariateStatisticsView(StatementContext statementContext,
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(StatementContext statementContext)
Duplicates the view. |
protected static EventType |
createEventType(StatementContext statementContext)
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 com.espertech.esper.view.ViewSupport |
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addView, dumpChildViews, dumpUpdateParams, 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(StatementContext statementContext, 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.statementContext
- contains required view servicesMethod 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 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 EventCollection
iterator
in interface Iterable<EventBean>
public final String toString()
toString
in class Object
protected static EventType createEventType(StatementContext statementContext)
statementContext
- is the event adapter service
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© 2007 EsperTech Inc. All rights reserved. Visit us at espertech.com |
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