com.metamatrix.query.eval
Interface LookupEvaluator

All Known Subinterfaces:

ProcessorDataManager

All Known Implementing Classes:

TempTableDataManager

public interface LookupEvaluator

Since:

5.0

Method Summary

java.lang.Object

lookupCodeValue(CommandContext context, java.lang.String codeTableName, java.lang.String returnElementName, java.lang.String keyElementName, java.lang.Object keyValue) Lookup a value from a cached code table.

Method Detail

lookupCodeValue

java.lang.Object lookupCodeValue(CommandContext context,
                                 java.lang.String codeTableName,
                                 java.lang.String returnElementName,
                                 java.lang.String keyElementName,
                                 java.lang.Object keyValue)
                                 throws BlockedException,
                                        MetaMatrixComponentException,
                                        MetaMatrixProcessingException

Lookup a value from a cached code table. If the code table is not loaded, it will be loaded on the first query. Code tables should be cached based on a combination of the codeTableName, returnElementName, and keyElementName. If the table is not loaded, a request will be made and the method should throw a BlockedException.

Parameters:

context - Context for processing

codeTableName - Name of the code table - must be a physical table

returnElementName - Name of the element to be returned in the code table

keyElementName - Name of the key element in the code table

keyValue - Key value to look up

Returns:

Return value for the specified key value, or null if not found

Throws:

BlockedException - If code table must be loaded

MetaMatrixComponentException - If an unexpected error occurs

MetaMatrixProcessingException