/*

 * Copyright (c) 2005, 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.httpserver;

import java.util.*;

import com.sun.net.httpserver.*;

class UnmodifiableHeaders extends Headers {

        Headers map;

        UnmodifiableHeaders(Headers map) {

            this.map = map;

        }

        public int size() {return map.size();}

        public boolean isEmpty() {return map.isEmpty();}

        public boolean containsKey(Object key) {

            return map.containsKey (key);

        }

        public boolean containsValue(Object value) {

            return map.containsValue(value);

        }

        public List<String> get(Object key) {

            return map.get(key);

        }

        public String getFirst (String key) {

            return map.getFirst(key);

        }

        public List<String> put(String key, List<String> value) {

            return map.put (key, value);

        }

        public void add (String key, String value) {

            throw new UnsupportedOperationException ("unsupported operation");

        }

        public void set (String key, String value) {

            throw new UnsupportedOperationException ("unsupported operation");

        }

        public List<String> remove(Object key) {

            throw new UnsupportedOperationException ("unsupported operation");

        }

        public void putAll(Map<? extends String,? extends List<String>> t)  {

            throw new UnsupportedOperationException ("unsupported operation");

        }

        public void clear() {

            throw new UnsupportedOperationException ("unsupported operation");

        }

        public Set<String> keySet() {

            return Collections.unmodifiableSet (map.keySet());

        }

        public Collection<List<String>> values() {

            return Collections.unmodifiableCollection(map.values());

        }

        /* TODO check that contents of set are not modifable : security */

        public Set<Map.Entry<String, List<String>>> entrySet() {

            return Collections.unmodifiableSet (map.entrySet());

        }

        public boolean equals(Object o) {return map.equals(o);}

        public int hashCode() {return map.hashCode();}

    }