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java.lang.Objectcom.espertech.esper.epl.core.SelectExprProcessorFactory
public class SelectExprProcessorFactory
Factory for select expression processors.
Constructor Summary | |
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SelectExprProcessorFactory()
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Method Summary | |
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static SelectExprProcessor |
getProcessor(List<SelectClauseElementCompiled> selectionList,
boolean isUsingWildcard,
InsertIntoDesc insertIntoDesc,
StreamTypeService typeService,
EventAdapterService eventAdapterService,
StatementResultService statementResultService,
ValueAddEventService valueAddEventService)
Returns the processor to use for a given select-clause. |
protected static void |
verifyNameUniqueness(List<SelectClauseElementCompiled> selectionList)
Verify that each given name occurs exactly one. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public SelectExprProcessorFactory()
Method Detail |
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public static SelectExprProcessor getProcessor(List<SelectClauseElementCompiled> selectionList, boolean isUsingWildcard, InsertIntoDesc insertIntoDesc, StreamTypeService typeService, EventAdapterService eventAdapterService, StatementResultService statementResultService, ValueAddEventService valueAddEventService) throws ExprValidationException
selectionList
- - the list of select clause elements/items, which are expected to have been validatedisUsingWildcard
- - true if the wildcard (*) occurs in the select clauseinsertIntoDesc
- - contains column names for the optional insert-into clause (if supplied)typeService
- - serves stream type informationeventAdapterService
- - for generating wrapper instances for eventsstatementResultService
- handles listeners/subscriptions awareness to reduce output result generationvalueAddEventService
- - service that handles update events and variant events
ExprValidationException
- to indicate the select expression cannot be validatedprotected static void verifyNameUniqueness(List<SelectClauseElementCompiled> selectionList) throws ExprValidationException
selectionList
- is the list of select items to verify names
ExprValidationException
- thrown if a name occured more then once
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