gee/map.vala

   1 /* map.vala
   2  *
   3  * Copyright (C) 2007  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 /**
  24  * A map is a generic collection of key/value pairs.
  25  */
  26 public abstract class Vala.Map<K,V> {
  27         /**
  28          * The number of items in this map.
  29          */
  30         public abstract int size { get; }
  31
  32         /**
  33          * Returns the keys of this map as a read-only set.
  34          *
  35          * @return the keys of the map
  36          */
  37         public abstract Set<K> get_keys ();
  38
  39         /**
  40          * Returns the values of this map as a read-only collection.
  41          *
  42          * @return the values of the map
  43          */
  44         public abstract Collection<V> get_values ();
  45
  46         /**
  47          * Determines whether this map contains the specified key.
  48          *
  49          * @param key the key to locate in the map
  50          *
  51          * @return    true if key is found, false otherwise
  52          */
  53         public abstract bool contains (K key);
  54
  55         /**
  56          * Returns the value of the specified key in this map.
  57          *
  58          * @param key the key whose value is to be retrieved
  59          *
  60          * @return    the value associated with the key, or null if the key
  61          *            couldn't be found
  62          */
  63         public abstract V? get (K key);
  64
  65         /**
  66          * Inserts a new key and value into this map.
  67          *
  68          * @param key   the key to insert
  69          * @param value the value to associate with the key
  70          */
  71         public abstract void set (K key, V value);
  72
  73         /**
  74          * Removes the specified key from this map.
  75          *
  76          * @param key the key to remove from the map
  77          *
  78          * @return    true if the map has been changed, false otherwise
  79          */
  80         public abstract bool remove (K key);
  81
  82         /**
  83          * Removes all items from this collection. Must not be called on
  84          * read-only collections.
  85          */
  86         public abstract void clear ();
  87 }
  88