jdbm
Interface SecondaryKeyExtractor<A,K,V>
- Type Parameters:
A
- Type of secondary keyK
- Type of primary keyV
- Type of primary value
public interface SecondaryKeyExtractor<A,K,V>
Extract secondary key from record in primary map.
- Author:
- Jan Kotek
extractSecondaryKey
A extractSecondaryKey(K key,
V value)
- Extracts secondary key from primary map
- Parameters:
key
- key in primary tablevalue
- value in primary table
- Returns:
- secondary key or null to skip this record
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