com.espertech.esper.epl.named
Class NotADataWindowViewCapability

java.lang.Object
  extended by com.espertech.esper.epl.named.NotADataWindowViewCapability
All Implemented Interfaces:
ViewCapability

public class NotADataWindowViewCapability
extends Object
implements ViewCapability

Expresses the requirement that all views are derived-value views and now data window views, with the exception of group-by and merge views.


Constructor Summary
NotADataWindowViewCapability()
           
 
Method Summary
 boolean inspect(int streamNumber, List<ViewFactory> viewFactories, StatementContext statementContext)
          Inspect view factories returning false to indicate that view factories do not meet view resource requirements, or true to indicate view capability and view factories can be compatible.
 boolean requiresChildViews()
          Returns true to indicate that the capability requirs one or more child views, or can work without child views.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

NotADataWindowViewCapability

public NotADataWindowViewCapability()
Method Detail

inspect

public boolean inspect(int streamNumber,
                       List<ViewFactory> viewFactories,
                       StatementContext statementContext)
                throws ExprValidationException
Description copied from interface: ViewCapability
Inspect view factories returning false to indicate that view factories do not meet view resource requirements, or true to indicate view capability and view factories can be compatible.

Specified by:
inspect in interface ViewCapability
Parameters:
streamNumber - is the number of the stream
viewFactories - is a list of view factories that originate the final views
statementContext - is the statement-level services
Returns:
true to indicate inspection success, or false to indicate inspection failure
Throws:
ExprValidationException - to indicate the inspect operation failed and a capability is not provided

requiresChildViews

public boolean requiresChildViews()
Description copied from interface: ViewCapability
Returns true to indicate that the capability requirs one or more child views, or can work without child views.

Specified by:
requiresChildViews in interface ViewCapability
Returns:
true for child views required, false for not required

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