question: public int hashCode ( ) { if ( myhash == - 1 ) { if ( timestamp == null ) { myhash = signerCertPath . hashCode ( ) ; } else { myhash = signerCertPath . hashCode ( ) + timestamp . hashCode ( ) ; } } return myhash ; }
target:  Returns the hash code value for this code signer. The hash code is generated using the signer's certificate path and the timestamp, if present.