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