78 lines
2.2 KiB
C#
78 lines
2.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text;
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namespace UniversalEditor.Collections.Generic
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{
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/// <summary>
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/// Provides a collection that can be keyed either forward (T1=>T2) or backward (T2=>T1).
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/// </summary>
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/// <typeparam name="T1">The type of the value on which to forward-key the collection.</typeparam>
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/// <typeparam name="T2">The type of the value on which to backward-key the collection.</typeparam>
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public class BidirectionalDictionary<T1, T2> : System.Collections.IEnumerable
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{
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private Dictionary<T1, T2> mvarForwardDictionary = new Dictionary<T1, T2>();
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private Dictionary<T2, T1> mvarBackwardDictionary = new Dictionary<T2, T1>();
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public void Add(T1 value1, T2 value2)
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{
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this.mvarForwardDictionary.Add(value1, value2);
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this.mvarBackwardDictionary.Add(value2, value1);
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}
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public void RemoveByValue1(T1 value1)
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{
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T2 value2 = this.mvarForwardDictionary[value1];
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this.mvarForwardDictionary.Remove(value1);
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this.mvarBackwardDictionary.Remove(value2);
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}
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public void RemoveByValue2(T2 value2)
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{
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T1 value3 = this.mvarBackwardDictionary[value2];
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this.mvarForwardDictionary.Remove(value3);
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this.mvarBackwardDictionary.Remove(value2);
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}
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public T1 GetValue1(T2 value2)
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{
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return this.mvarBackwardDictionary[value2];
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}
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public T2 GetValue2(T1 value1)
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{
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return this.mvarForwardDictionary[value1];
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}
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public bool HasValue1(T2 value2)
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{
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return this.mvarBackwardDictionary.ContainsKey(value2);
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}
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public bool HasValue2(T1 value1)
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{
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return this.mvarForwardDictionary.ContainsKey(value1);
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}
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public IEnumerator<KeyValuePair<T1, T2>> GetEnumerator()
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{
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return this.mvarForwardDictionary.GetEnumerator();
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}
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System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
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{
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return this.mvarForwardDictionary.GetEnumerator();
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}
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public bool ContainsValue1(T1 value)
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{
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return this.mvarForwardDictionary.ContainsKey(value);
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}
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public bool ContainsValue2(T2 value)
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{
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return this.mvarBackwardDictionary.ContainsKey(value);
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}
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public int Count
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{
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get
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{
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if (mvarForwardDictionary.Count != mvarBackwardDictionary.Count) throw new InvalidOperationException("Count mismatch");
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return mvarBackwardDictionary.Count;
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}
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}
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}
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}
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