/*

 * Copyright (c) 2003, 2011, 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.  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 sun.net.www.protocol.http;

import java.util.LinkedList;

import java.util.ListIterator;

import java.util.HashMap;

/**

 * @author Michael McMahon

 */

public class AuthCacheImpl implements AuthCache {

    HashMap<String,LinkedList<AuthCacheValue>> hashtable;

    public AuthCacheImpl () {

        hashtable = new HashMap<String,LinkedList<AuthCacheValue>>();

    }

    public void setMap (HashMap<String,LinkedList<AuthCacheValue>> map) {

        hashtable = map;

    }

    // put a value in map according to primary key + secondary key which

    // is the path field of AuthenticationInfo

    public synchronized void put (String pkey, AuthCacheValue value) {

        LinkedList<AuthCacheValue> list = hashtable.get (pkey);

        String skey = value.getPath();

        if (list == null) {

            list = new LinkedList<AuthCacheValue>();

            hashtable.put(pkey, list);

        }

        // Check if the path already exists or a super-set of it exists

        ListIterator<AuthCacheValue> iter = list.listIterator();

        while (iter.hasNext()) {

            AuthenticationInfo inf = (AuthenticationInfo)iter.next();

            if (inf.path == null || inf.path.startsWith (skey)) {

                iter.remove ();

            }

        }

        iter.add(value);

    }

    // get a value from map checking both primary

    // and secondary (urlpath) key

    public synchronized AuthCacheValue get (String pkey, String skey) {

        AuthenticationInfo result = null;

        LinkedList<AuthCacheValue> list = hashtable.get (pkey);

        if (list == null || list.size() == 0) {

            return null;

        }

        if (skey == null) {

            // list should contain only one element

            return (AuthenticationInfo)list.get (0);

        }

        ListIterator<AuthCacheValue> iter = list.listIterator();

        while (iter.hasNext()) {

            AuthenticationInfo inf = (AuthenticationInfo)iter.next();

            if (skey.startsWith (inf.path)) {

                return inf;

            }

        }

        return null;

    }

    public synchronized void remove (String pkey, AuthCacheValue entry) {

        LinkedList<AuthCacheValue> list = hashtable.get (pkey);

        if (list == null) {

            return;

        }

        if (entry == null) {

            list.clear();

            return;

        }

        ListIterator<AuthCacheValue> iter = list.listIterator ();

        while (iter.hasNext()) {

            AuthenticationInfo inf = (AuthenticationInfo)iter.next();

            if (entry.equals(inf)) {

                iter.remove ();

            }

        }

    }

}