src/java.base/share/classes/javax/net/ssl/KeyManagerFactorySpi.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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package javax.net.ssl;

import java.security.*;

/**
 * This class defines the <i>Service Provider Interface</i> (<b>SPI</b>)
 * for the <code>KeyManagerFactory</code> class.
 *
 * <p> 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 KeyManagerFactory
 * @see KeyManager
 */
public abstract class KeyManagerFactorySpi {
    /**
     * Constructor for subclasses to call.
     */
    public KeyManagerFactorySpi() {}

    /**
     * Initializes this factory with a source of key material.
     *
     * @param ks the key store or null
     * @param password the password for recovering keys
     * @throws KeyStoreException if this operation fails
     * @throws NoSuchAlgorithmException if the specified algorithm is not
     *          available from the specified provider.
     * @throws UnrecoverableKeyException if the key cannot be recovered
     * @see KeyManagerFactory#init(KeyStore, char[])
     */
    protected abstract void engineInit(KeyStore ks, char[] password) throws
        KeyStoreException, NoSuchAlgorithmException, UnrecoverableKeyException;

    /**
     * Initializes this factory with a source of key material.
     * <P>
     * 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 <CODE>ManagerFactoryParameters</CODE> as
     * defined by the provider.  The provider can then call the
     * specified methods in the ManagerFactoryParameters
     * implementation to obtain the needed information.
     *
     * @param spec an implementation of a provider-specific parameter
     *          specification
     * @throws InvalidAlgorithmParameterException if there is problem
     *          with the parameters
     * @see KeyManagerFactory#init(ManagerFactoryParameters spec)
     */
    protected abstract void engineInit(ManagerFactoryParameters spec)
        throws InvalidAlgorithmParameterException;

    /**
     * Returns one key manager for each type of key material.
     *
     * @return the key managers
     * @throws IllegalStateException
     *         if the KeyManagerFactorySpi is not initialized
     */
    protected abstract KeyManager[] engineGetKeyManagers();
}