/*

 * Copyright (c) 1998, 2016, 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.

 */

/*

 * @test

 * @bug 4190873 7054918 8130181

 * @library ../testlibrary

 * @summary Make sure provider instance can be removed from list of registered

 * providers, and "entrySet", "keySet", and "values" methods don't loop

 * indefinitely.

 */

import java.security.*;

import java.util.*;

public class RemoveProvider {

    public static void main(String[] args) throws Exception {

        ProvidersSnapshot snapshot = ProvidersSnapshot.create();

        try {

            main0(args);

        } finally {

            snapshot.restore();

        }

    }

    public static void main0(String[] args) throws Exception {

        // Add provider 1

        Provider p1 = new MyProvider("name1","1","");

        Security.addProvider(p1);

        // Add provider 2

        Provider p2 = new MyProvider("name2","1","");

        Security.addProvider(p2);

        // List all providers

        System.out.println("// List all providers");

        Provider[] provs = Security.getProviders();

        for (int i=0; i<provs.length; i++)

            System.out.println(provs[i].toString());

        // Remove one provider and list all remaining providers

        System.out.println("");

        System.out.println("// Remove one provider");

        Security.removeProvider("name1");

        provs = Security.getProviders();

        for (int i=0; i<provs.length; i++)

            System.out.println(provs[i].toString());

        // Iterate over the entrySet

        System.out.println("");

        System.out.println("// Iterate over entrySet");

        Map.Entry me = null;

        Set es = p1.entrySet();

        Iterator i = es.iterator();

        while (i.hasNext()) {

            me = (Map.Entry)i.next();

            System.out.println("Key: " + (String)me.getKey());

            System.out.println("Value: " + (String)me.getValue());

        }

        // Try to modify the backing Map, and catch the expected exception

        try {

            me.setValue("name1.mac");

            throw new Exception("Expected exception not thrown");

        } catch (UnsupportedOperationException uoe) {

            System.out.println("Expected exception caught");

        }

        // Iterate over the keySet, and try to remove one (should fail)

        System.out.println("");

        System.out.println("// Iterate over keySet");

        Object o = null;

        Set ks = p1.keySet();

        i = ks.iterator();

        while (i.hasNext()) {

            o = i.next();

            System.out.println((String)o);

        }

        try {

            ks.remove(o);

            throw new Exception("Expected exception not thrown");

        } catch (UnsupportedOperationException uoe) {

        }

        // Iterate over the map values

        System.out.println("");

        System.out.println("// Iterate over values");

        Collection c = p1.values();

        i = c.iterator();

        while (i.hasNext()) {

            System.out.println((String)i.next());

        }

        // Modify provider and make sure changes are reflected in

        // existing entrySet (i.e., make sure entrySet is "live").

        // First, add entry to provider.

        System.out.println("");

        System.out.println("// Add 'Cipher' entry to provider");

        p1.put("Cipher", "name1.des");

        //  entrySet

        i = es.iterator();

        boolean found = false;

        while (i.hasNext()) {

            me = (Map.Entry)i.next();

            System.out.println("Key: " + (String)me.getKey());

            System.out.println("Value: " + (String)me.getValue());

            if (((String)me.getKey()).equals("Cipher"))

                found = true;

        }

        if (!found)

            throw new Exception("EntrySet not live");

        // keySet

        i = ks.iterator();

        while (i.hasNext()) {

            o = i.next();

            System.out.println((String)o);

        }

        // collection

        i = c.iterator();

        while (i.hasNext()) {

            System.out.println((String)i.next());

        }

        // Remove entry from provider

        System.out.println("");

        System.out.println("// Remove 'Digest' entry from provider");

        p1.remove("Digest");

        // entrySet

        i = es.iterator();

        while (i.hasNext()) {

            me = (Map.Entry)i.next();

            System.out.println("Key: " + (String)me.getKey());

            System.out.println("Value: " + (String)me.getValue());

        }

        // keySet

        i = ks.iterator();

        while (i.hasNext()) {

            o = i.next();

            System.out.println((String)o);

        }

        // collection

        i = c.iterator();

        while (i.hasNext()) {

            System.out.println((String)i.next());

        }

        // Retrieve new entrySet and make sure the backing Map cannot be

        // mofified

        es = p1.entrySet();

        i = es.iterator();

        while (i.hasNext()) {

            me = (Map.Entry)i.next();

            System.out.println("Key: " + (String)me.getKey());

            System.out.println("Value: " + (String)me.getValue());

        }

        try {

            me.setValue("name1.mac");

            throw new Exception("Expected exception not thrown");

        } catch (UnsupportedOperationException uoe) {

            System.out.println("Expected exception caught");

        }

    }

}

class MyProvider extends Provider {

    public MyProvider(String name, String version, String info) {

        super(name, version, info);

        put("Signature", name+".signature");

        put("Digest", name+".digest");

    }

}