# Class KeyManagerFactorySpi

java.lang.Object
javax.net.ssl.KeyManagerFactorySpi

public abstract class KeyManagerFactorySpi extends Object
This class defines the Service Provider Interface (SPI) for the `KeyManagerFactory` class.

All the abstract methods in this class must be implemented by each cryptographic service provider who wishes to supply the implementation of a particular key manager factory.

Since:
  1.4
See Also:
  - `KeyManagerFactory`
  - `KeyManager`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `KeyManagerFactorySpi()`
  Constructor for subclasses to call.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `protected abstract KeyManager[]`
  `engineGetKeyManagers()`
  Returns one key manager for each type of key material.
  `protected abstract void`
  `engineInit(KeyStore ks, char[] password)`
  Initializes this factory with a source of key material.
  `protected abstract void`
  `engineInit(ManagerFactoryParameters spec)`
  Initializes this factory with a source of key material.

  ### Methods declared in class Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- ## Constructor Details

  - ### KeyManagerFactorySpi

    public KeyManagerFactorySpi()
    Constructor for subclasses to call.

- ## Method Details

  - ### engineInit

    protected abstract void engineInit(KeyStore ks, char[] password) throws KeyStoreException, NoSuchAlgorithmException, UnrecoverableKeyException
    Initializes this factory with a source of key material.
    Parameters:
      `ks` - the key store or null
      `password` - the password for recovering keys
    Throws:
      `KeyStoreException` - if this operation fails
      `NoSuchAlgorithmException` - if the specified algorithm is not available from the specified provider.
      `UnrecoverableKeyException` - if the key cannot be recovered
    See Also:
      - `KeyManagerFactory.init(KeyStore, char[])`

  - ### engineInit

    protected abstract void engineInit(ManagerFactoryParameters spec) throws InvalidAlgorithmParameterException
    Initializes this factory with a source of key material.

    In some cases, initialization parameters other than a keystore and password may be needed by a provider. Users of that particular provider are expected to pass an implementation of the appropriate `ManagerFactoryParameters` as defined by the provider. The provider can then call the specified methods in the ManagerFactoryParameters implementation to obtain the needed information.

    Parameters:
      `spec` - an implementation of a provider-specific parameter specification
    Throws:
      `InvalidAlgorithmParameterException` - if there is problem with the parameters
    See Also:
      - `KeyManagerFactory.init(ManagerFactoryParameters spec)`

  - ### engineGetKeyManagers

    protected abstract KeyManager[] engineGetKeyManagers()
    Returns one key manager for each type of key material.
    Returns:
      the key managers
    Throws:
      `IllegalStateException` - if the KeyManagerFactorySpi is not initialized