/*

 * 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.  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.

 *

 * 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.

 */

package java.security;

import java.io.ObjectOutputStream;

/**

 * A UnresolvedPermissionCollection stores a collection

 * of UnresolvedPermission permissions.

 *

 * @see java.security.Permission

 * @see java.security.Permissions

 * @see java.security.UnresolvedPermission

 *

 *

 * @author Roland Schemers

 *

 * @serial include

 */

final class UnresolvedPermissionCollection

extends PermissionCollection

implements java.io.Serializable

{

    /**

     * Key is permission type, value is a list of the UnresolvedPermissions

     * of the same type.

     * Not serialized; see serialization section at end of class.

     */

    /**

     * Create an empty UnresolvedPermissionCollection object.

     *

     */

    public UnresolvedPermissionCollection() {

    }

    /**

     * Adds a permission to this UnresolvedPermissionCollection.

     * The key for the hash is the unresolved permission's type (class) name.

     *

     * @param permission the Permission object to add.

     */

        if (! (permission instanceof UnresolvedPermission))

            throw new IllegalArgumentException("invalid permission: "+

                                               permission);

        UnresolvedPermission up = (UnresolvedPermission) permission;

            }

    }

    /**

     * get any unresolved permissions of the same type as p,

     * and return the List containing them.

     */

    List<UnresolvedPermission> getUnresolvedPermissions(Permission p) {

    }

    /**

     * always returns false for unresolved permissions

     *

     */

        return false;

    }

    /**

     * Returns an enumeration of all the UnresolvedPermission lists in the

     * container.

     *

     * @return an enumeration of all the UnresolvedPermission objects.

     */

    public Enumeration<Permission> elements() {

        List<Permission> results =

            new ArrayList<>(); // where results are stored

        // Get iterator of Map values (which are lists of permissions)

        }

        return Collections.enumeration(results);

    }

    private static final long serialVersionUID = -7176153071733132400L;

    // Need to maintain serialization interoperability with earlier releases,

    // which had the serializable field:

    // private Hashtable permissions; // keyed on type

    /**

     * @serialField permissions java.util.Hashtable

     *     A table of the UnresolvedPermissions keyed on type, value is Vector

     *     of permissions

     */

    private static final ObjectStreamField[] serialPersistentFields = {

        new ObjectStreamField("permissions", Hashtable.class),

    };

    /**

     * @serialData Default field.

     */

    /*

     * Writes the contents of the perms field out as a Hashtable

     * in which the values are Vectors for

     * serialization compatibility with earlier releases.

     */

    private void writeObject(ObjectOutputStream out) throws IOException {

        // Don't call out.defaultWriteObject()

        // Copy perms into a Hashtable

        Hashtable<String, Vector<UnresolvedPermission>> permissions =

            new Hashtable<>(perms.size()*2);

        // Convert each entry (List) into a Vector

        }

        // Write out serializable fields

        ObjectOutputStream.PutField pfields = out.putFields();

        pfields.put("permissions", permissions);

        out.writeFields();

    }

    /*

     * Reads in a Hashtable in which the values are Vectors of

     * UnresolvedPermissions and saves them in the perms field.

     */

    private void readObject(ObjectInputStream in) throws IOException,

    ClassNotFoundException {

        // Don't call defaultReadObject()

        // Read in serialized fields

        ObjectInputStream.GetField gfields = in.readFields();

        // Get permissions

        @SuppressWarnings("unchecked")

        // writeObject writes a Hashtable<String, Vector<UnresolvedPermission>>

        // for the permissions key, so this cast is safe, unless the data is corrupt.

        Hashtable<String, Vector<UnresolvedPermission>> permissions =

                (Hashtable<String, Vector<UnresolvedPermission>>)

                gfields.get("permissions", null);

        // Convert each entry (Vector) into a List

        Set<Map.Entry<String, Vector<UnresolvedPermission>>> set = permissions.entrySet();

        for (Map.Entry<String, Vector<UnresolvedPermission>> e : set) {

            // Convert Vector into ArrayList

            Vector<UnresolvedPermission> vec = e.getValue();

            // Add to Hashtable being serialized

            perms.put(e.getKey(), list);

        }

    }

}