question: private void indexCRL ( X509CRL crl ) { X500Principal issuer = crl . getIssuerX500Principal ( ) ; Object oldEntry = crlIssuers . put ( issuer , crl ) ; if ( oldEntry != null ) { if ( oldEntry instanceof X509CRL ) { if ( crl . equals ( oldEntry ) ) { return ; } List < X509CRL > list = new ArrayList < > ( 2 ) ; list . add ( crl ) ; list . add ( ( X509CRL ) oldEntry ) ; crlIssuers . put ( issuer , list ) ; } else { @ SuppressWarnings ( "unchecked" ) List < X509CRL > list = ( List < X509CRL > ) oldEntry ; if ( list . contains ( crl ) == false ) { list . add ( crl ) ; } crlIssuers . put ( issuer , list ) ; } } }
target:  Add an X509CRL to the index.