139 lines
3.9 KiB
C#
139 lines
3.9 KiB
C#
//
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// ImmutableIntKeyMap.cs
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//
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// Authors:
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// Alexander Chebaturkin (chebaturkin@gmail.com)
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//
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// Copyright (C) 2011 Alexander Chebaturkin
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Collections.Generic;
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using System.Linq;
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namespace Mono.CodeContracts.Static.DataStructures {
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class ImmutableIntKeyMap<K, V> : IImmutableMap<K, V>, IEquatable<IImmutableMap<K, V>> {
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private readonly IImmutableIntMap<Pair<K, V>> immutable_int_map;
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private readonly Func<K, int> keyConverter;
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private ImmutableIntKeyMap (IImmutableIntMap<Pair<K, V>> map, Func<K, int> converter)
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{
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this.immutable_int_map = map;
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this.keyConverter = converter;
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}
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#region Implementation of IImmutableMap<K,V>
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public V this [K key]
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{
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get
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{
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V value;
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TryGetValue (key, out value);
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return value;
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}
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}
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public K AnyKey
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{
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get { return Keys.First (); }
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}
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public IEnumerable<K> Keys
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{
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get
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{
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var res = new List<K> ();
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this.immutable_int_map.Visit (data => res.Add (data.Key));
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return res;
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}
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}
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public int Count
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{
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get { return this.immutable_int_map.Count; }
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}
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public IImmutableMap<K, V> EmptyMap
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{
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get { return Empty (this.keyConverter); }
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}
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public IImmutableMap<K, V> Add (K key, V value)
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{
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return new ImmutableIntKeyMap<K, V> (this.immutable_int_map.Add (this.keyConverter (key), new Pair<K, V> (key, value)), this.keyConverter);
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}
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public IImmutableMap<K, V> Remove (K key)
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{
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return new ImmutableIntKeyMap<K, V> (this.immutable_int_map.Remove (this.keyConverter (key)), this.keyConverter);
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}
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public bool ContainsKey (K key)
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{
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return this.immutable_int_map.Contains (this.keyConverter (key));
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}
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public bool TryGetValue(K key, out V value)
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{
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Pair<K, V> pair = this.immutable_int_map[this.keyConverter(key)];
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if (pair != null)
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return true.With(pair.Value, out value);
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return false.Without(out value);
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}
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public void Visit (Func<K, V, VisitStatus> func)
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{
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this.immutable_int_map.Visit (data => func (data.Key, data.Value));
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}
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#endregion
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#region Implementation of IEquatable<IImmutableMap<K,V>>
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public bool Equals (IImmutableMap<K, V> other)
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{
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return this == other;
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}
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#endregion
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public static IImmutableMap<K, V> Empty (Func<K, int> keyConverter)
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{
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return new ImmutableIntKeyMap<K, V> (ImmutableIntMap<Pair<K, V>>.Empty, keyConverter);
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}
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public IImmutableMapFactory<K, V> Factory ()
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{
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return new MapFactory (this.keyConverter);
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}
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private class MapFactory : IImmutableMapFactory<K,V> {
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private readonly Func<K, int> keyConverter;
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public MapFactory (Func<K, int> keyConverter)
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{
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this.keyConverter = keyConverter;
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}
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public IImmutableMap<K, V> Empty { get { return ImmutableIntKeyMap<K, V>.Empty (keyConverter);}}
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}
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}
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}
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