This class implements the X509KeyManager interface and extends it with two methods.

Figure 18-18. javax.net.ssl.X509ExtendedKeyManager

public abstract class X509ExtendedKeyManager implements X509KeyManager {
// Protected Constructors
     protected X509ExtendedKeyManager( );  
// Public Instance Methods
     public String chooseEngineClientAlias(String[ ] keyType, 
        java.security.Principal[ ] issuers, 
        SSLEngine engine);     constant
     public String chooseEngineServerAlias(String keyType, 
        java.security.Principal[ ] issuers, 
        SSLEngine engine);     constant
}