gee/readonlymap.vala

   1 /* readonlymap.vala
   2  *
   3  * Copyright (C) 2007-2008  Jürg Billeter
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
  18  *
  19  * Author:
  20  *      Jürg Billeter <j@bitron.ch>
  21  */
  22
  23 using GLib;
  24
  25 /**
  26  * Represents a read-only collection of key/value pairs.
  27  */
  28 public class Gee.ReadOnlyMap<K,V> : CollectionObject, Map<K,V> {
  29         public int size {
  30                 get { return _map.size; }
  31         }
  32
  33         public Map<K,V> map {
  34                 set { _map = value; }
  35         }
  36
  37         private Map<K,V> _map;
  38
  39         public ReadOnlyMap (Map<K,V>? map = null) {
  40                 this.map = map;
  41         }
  42
  43         public Set<K> get_keys () {
  44                 if (_map == null) {
  45                         return new ReadOnlySet<K> ();
  46                 }
  47
  48                 return _map.get_keys ();
  49         }
  50
  51         public Collection<V> get_values () {
  52                 if (_map == null) {
  53                         return new ReadOnlyCollection<V> ();
  54                 }
  55
  56                 return _map.get_values ();
  57         }
  58
  59         public bool contains (K key) {
  60                 if (_map == null) {
  61                         return false;
  62                 }
  63
  64                 return _map.contains (key);
  65         }
  66
  67         public V? get (K key) {
  68                 if (_map == null) {
  69                         return null;
  70                 }
  71
  72                 return _map.get (key);
  73         }
  74
  75         public void set (K key, V value) {
  76                 assert_not_reached ();
  77         }
  78
  79         public bool remove (K key) {
  80                 assert_not_reached ();
  81         }
  82
  83         public void clear () {
  84                 assert_not_reached ();
  85         }
  86 }
  87