/*
 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * 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.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * Portions Copyright (c) 2013 IBM Corporation
 */

/*
 * @test
 * @bug 
 * @Signature.getAlgorithm() return null if a concrete SignatureSpi extends
 * Signature rather than SignatureSpi
 * @author youdwei
 */

import java.security.*;

public class SignatureGetAlgorithm {
    public static void main(String[] args) throws Exception {
        Provider testProvider = new TestProvider();
        Security.addProvider(testProvider);
        Signature apple = Signature.getInstance("apple");
        String algorithm = apple.getAlgorithm();
        System.out.println("Algorithm is " + algorithm);
        if (algorithm == null) {
            throw new Exception("algorithm should be apple but null");
       }
    }

public static class TestProvider extends Provider {
    TestProvider() {
        super("test", 1.0, "test");
        put("Signature.apple", "SignatureGetAlgorithm$Apple");
    }
}

public static class Apple extends Signature {
        public Apple() {
            super(null);
            System.out.println("Apple Signature");
       }
        Apple(String s) {
            super(s);
        }
        protected void engineInitVerify(PublicKey publicKey) throws InvalidKeyException {
        }
        protected void engineInitSign(PrivateKey privateKey) throws InvalidKeyException {
        }
        protected void engineUpdate(byte b) throws SignatureException { }
        protected void engineUpdate(byte[] b, int off, int len) throws SignatureException { }
        protected byte[] engineSign() throws SignatureException {
            return new byte[0];
        }
        protected boolean engineVerify(byte[] sigBytes) throws SignatureException {
            return false;
        }
        protected void engineSetParameter(String param, Object value) throws InvalidParameterException {
        }
        protected Object engineGetParameter(String param) throws InvalidParameterException {
            return null;
        }
}
}