This abstract class defines the service-provider interface for SecretKeyFactory. A cryptographic provider must implement a concrete subclass of this class for each type of secret key it supports. Applications never need to use or subclass this class.

public abstract class SecretKeyFactorySpi {
// Public Constructors
     public SecretKeyFactorySpi( );  
// Protected Instance Methods
     protected abstract SecretKey engineGenerateSecret
        (java.security.spec.KeySpec keySpec) 
        throws java.security.spec.InvalidKeySpecException;  
     protected abstract java.security.spec.KeySpec engineGetKeySpec
        (SecretKey key, Class keySpec) 
        throws java.security.spec.InvalidKeySpecException;  
     protected abstract SecretKey engineTranslateKey
        (SecretKey key) throws java.security.InvalidKeyException;  
}

Passed To

SecretKeyFactory.SecretKeyFactory( )