Spring Security bcrypt constructor -

Spring Security bcrypt constructor -

i have question implementation of bcrypt in spring security.the class "org.springframework.security.crypto.bcrypt.bcryptpasswordencoder" in first constructor of bcrypt see "this(-1);" mean. far understand should refer field "strength" , default value should 10 set in org.springframework.security.crypto.bcrypt.bcrypt "private static final int gensalt_default_log2_rounds = 10;", -1 referring to, first constructor?

public class bcryptpasswordencoder implements passwordencoder { private pattern bcrypt_pattern = pattern.compile("\\a\\$2a?\\$\\d\\d\\$[./0-9a-za-z]{53}"); private final log logger = logfactory.getlog(getclass()); private final int strength; private final securerandom random; public bcryptpasswordencoder() { this(-1); }

since got far, why not @ where it's used in remainder of file?

unless value greater zero, calls default jbcrypt gensalt function:

bcrypt.gensalt();

which in turn uses default strength setting.

constructor spring-security bcrypt