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 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

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package java.security.spec;

/**

 * This class represents a public or private key in encoded format.

 *

 * @author Jan Luehe

 *

 *

 * @see java.security.Key

 * @see java.security.KeyFactory

 * @see KeySpec

 * @see X509EncodedKeySpec

 * @see PKCS8EncodedKeySpec

 *

 * @since 1.2

 */

public abstract class EncodedKeySpec implements KeySpec {

    private byte[] encodedKey;

    /**

     * Creates a new EncodedKeySpec with the given encoded key.

     *

     * @param encodedKey the encoded key. The contents of the

     * array are copied to protect against subsequent modification.

     * @exception NullPointerException if {@code encodedKey}

     * is null.

     */

    public EncodedKeySpec(byte[] encodedKey) {

        this.encodedKey = encodedKey.clone();

    }

    /**

     * Returns the encoded key.

     *

     * @return the encoded key. Returns a new array each time

     * this method is called.

     */

    public byte[] getEncoded() {

        return this.encodedKey.clone();

    }

    /**

     * Returns the name of the encoding format associated with this

     * key specification.

     *

     * <p>If the opaque representation of a key

     * (see {@link java.security.Key Key}) can be transformed

     * (see {@link java.security.KeyFactory KeyFactory})

     * into this key specification (or a subclass of it),

     * {@code getFormat} called

     * on the opaque key returns the same value as the

     * {@code getFormat} method

     * of this key specification.

     *

     * @return a string representation of the encoding format.

     */

    public abstract String getFormat();

}