Dictionaryのカスタマイズ
5103 ワード
日常開発では,ディクショナリへの大量操作,判断などに遭遇することが多い.もちろんDictionary本省でも、自分の論理処理に合ったDictionaryを書き換えることもできます.
public class MyDictionary<TKey, TValue> : IDictionary<TKey, TValue>
{
IList<TKey> keys = new List<TKey>();
IList<TValue> values = new List<TValue>();
public MyDictionary()
{
}
public MyDictionary(IDictionary<TKey, TValue> dictionary)
{
foreach (var key in dictionary.Keys)
{
this[(TKey)key] = (TValue)dictionary[key];
}
}
public ICollection<TKey> keySet()
{
return this.Keys;
}
public bool IsEmpty()
{
return (this.Count == 0);
}
#region MyDictionary<TKey,TValue> Members
public void Add(TKey key, TValue value)
{
keys.Add(key);
values.Add(value);
}
public bool ContainsKey(TKey key)
{
return keys.Contains(key);
}
public ICollection<TKey> Keys
{
get { return new ReadOnlyCollection<TKey>(keys); }
}
public bool Remove(TKey key)
{
int removeLocation = keys.IndexOf(key);
if (removeLocation < 0)
return false;
values.RemoveAt(removeLocation);
keys.RemoveAt(removeLocation);
return true;
}
public bool TryGetValue(TKey key, out TValue value)
{
if (keys.Contains(key))
{
value = values[keys.IndexOf(key)];
return true;
}
value = default(TValue);
return false;
}
public ICollection<TValue> Values
{
get { return new ReadOnlyCollection<TValue>(values); }
}
public TValue this[TKey key]
{
get
{
if (values.Count <= 0)
return default(TValue);
else
{
int nIndex = keys.IndexOf(key);
if (nIndex < 0)
return default(TValue);
else
return values[nIndex];
}
}
set
{
if (keys.Contains(key))
values[keys.IndexOf(key)] = value;
else
Add(key, value);
}
}
#endregion
#region ICollection<KeyValuePair<TKey,TValue>> Members
public void Add(KeyValuePair<TKey, TValue> item)
{
Add(item.Key, item.Value);
}
public void Clear()
{
keys.Clear();
values.Clear();
}
public bool Contains(KeyValuePair<TKey, TValue> item)
{
if (keys.Contains(item.Key))
return (this[item.Key].Equals(item.Value));
return false;
}
public void CopyTo(KeyValuePair<TKey, TValue>[] array, int arrayIndex)
{
if (array == null)
{
throw new ArgumentNullException("array was null");
}
if ((arrayIndex < 0) || (arrayIndex > array.Length))
{
throw new ArgumentOutOfRangeException("arrayIndex");
}
if ((array.Length - arrayIndex) < this.Count)
{
throw new ArgumentException("Array plus offset is too small");
}
foreach (KeyValuePair<TKey, TValue> keyValue in this)
{
array[arrayIndex++] = keyValue;
}
}
public int Count
{
get { return keys.Count; }
}
public bool IsReadOnly
{
get { return false; }
}
public bool Remove(KeyValuePair<TKey, TValue> item)
{
if (keys.Contains(item.Key) && values[keys.IndexOf(item.Key)].Equals(item.Value))
{
Remove(item.Key);
return true;
}
return false;
}
#endregion
#region IEnumerable<KeyValuePair<TKey,TValue>> Members
public IEnumerator<KeyValuePair<TKey, TValue>> GetEnumerator()
{
int index = 0;
foreach (TKey key in keys)
yield return new KeyValuePair<TKey, TValue>(key, values[index++]);
}
#endregion
#region IEnumerable Members
IEnumerator System.Collections.IEnumerable.GetEnumerator()
{
return this.Keys.GetEnumerator();
}
#endregion
}