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java.lang.Objectnet.esper.eql.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<SelectExprElementCompiledSpec> selectionList,
List<SelectExprElementStreamCompiledSpec> selectedStreams,
boolean isUsingWildcard,
InsertIntoDesc insertIntoDesc,
StreamTypeService typeService,
EventAdapterService eventAdapterService)
Returns the processor to use for a given select-clause. |
protected static void |
verifyNameUniqueness(List<SelectExprElementCompiledSpec> selectionList,
List<SelectExprElementStreamCompiledSpec> selectedStreams)
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<SelectExprElementCompiledSpec> selectionList, List<SelectExprElementStreamCompiledSpec> selectedStreams, boolean isUsingWildcard, InsertIntoDesc insertIntoDesc, StreamTypeService typeService, EventAdapterService eventAdapterService) throws ExprValidationException
selectionList
- - the list of select clause elements/items, which are expected to have been validatedselectedStreams
- - list of stream selectors (e.g. select alias.* from Event as alias)isUsingWildcard
- - 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 events
ExprValidationException
- to indicate the select expression cannot be validatedprotected static void verifyNameUniqueness(List<SelectExprElementCompiledSpec> selectionList, List<SelectExprElementStreamCompiledSpec> selectedStreams) throws ExprValidationException
selectionList
- is the list of select items to verify namesselectedStreams
- - list of stream selectors (e.g. select alias.* from Event as alias)
ExprValidationException
- thrown if a name occured more then once
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