public LuceneIndexingParameters(Properties sourceProps) 
{
	
		//prefer keys under "indexwriter" but fallback for backwards compatibility:
		Properties indexingParameters = new MaskedProperty( sourceProps, PROP_GROUP, sourceProps );
		//get keys for "transaction"
		Properties transactionProps = new MaskedProperty( indexingParameters, TRANSACTION );
		//get keys for "batch" (defaulting to transaction)
		Properties batchProps = new MaskedProperty( indexingParameters, BATCH, transactionProps ); //TODO to close HSEARCH-201 just remove 3° parameter
		transactionIndexParameters = new ParameterSet( transactionProps, TRANSACTION);
		batchIndexParameters = new ParameterSet( batchProps, BATCH);
		doSanityChecks( transactionIndexParameters, batchIndexParameters);
}

 public  void applyToWriter(IndexWriter writer,
    boolean batch) 
{
		if ( batch ) {
			getBatchIndexParameters().applyToWriter( writer );
		}
		else {
			getTransactionIndexParameters().applyToWriter( writer );
		}
}

 public LuceneIndexingParameters.ParameterSet getBatchIndexParameters() 
{
		return batchIndexParameters;
}

 public LuceneIndexingParameters.ParameterSet getTransactionIndexParameters() 
{
		return transactionIndexParameters;
}