question: protected void checkForDuplicateKeys ( Object [ ] template ) throws Exception { Hashtable < Object , Object > hash = new Hashtable < Object , Object > ( ) ; int numMatches = 0 ; for ( int i = 0 ; i < m_Keys . size ( ) ; i ++ ) { Object [ ] current = m_Keys . get ( i ) ; if ( ! matchesTemplate ( template , current ) ) { continue ; } if ( hash . containsKey ( current [ m_KeyIndex ] ) ) { throw new Exception ( "Duplicate result received:" + DatabaseUtils . arrayToString ( current ) ) ; } numMatches ++ ; hash . put ( current [ m_KeyIndex ] , current [ m_KeyIndex ] ) ; } if ( numMatches != m_ExpectedResultsPerAverage ) { throw new Exception ( "Expected " + m_ExpectedResultsPerAverage + " results matching key \"" + DatabaseUtils . arrayToString ( template ) + "\" but got " + numMatches ) ; } }
target:  Checks whether any duplicate results (with respect to a key template) were received.