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Added INotifyCollectionChanged interface to ObservableCollection and ObservableDictionary; added a new dictionary type, the MultiDictionary which is equivalent to the C++ multimap<> class

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git-svn-id: file:///srv/devel/repo-conversion/nusu@215 d2e56fa2-650e-0410-a79f-9358c0239efd
This commit is contained in:
Markus Ewald 2011-07-04 22:21:57 +00:00
parent aa5e4d12cc
commit a08939e914
10 changed files with 1350 additions and 70 deletions
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14
Nuclex.Support (net-4.0).csproj
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@ -76,12 +76,23 @@
<Compile Include="Source\Collections\Deque.Test.cs">
<DependentUpon>Deque.cs</DependentUpon>
</Compile>
<Compile Include="Source\Collections\IMultiDictionary.cs" />
<Compile Include="Source\Collections\IObservableCollection.cs" />
<Compile Include="Source\Collections\IRecyclable.cs" />
<Compile Include="Source\Collections\ItemEventArgs.cs" />
<Compile Include="Source\Collections\ItemEventArgs.Test.cs">
<DependentUpon>ItemEventArgs.cs</DependentUpon>
</Compile>
<Compile Include="Source\Collections\MultiDictionary.cs" />
<Compile Include="Source\Collections\MultiDictionary.ValueCollection.cs">
<DependentUpon>MultiDictionary.cs</DependentUpon>
</Compile>
<Compile Include="Source\Collections\MultiDictionary.Interfaces.cs">
<DependentUpon>MultiDictionary.cs</DependentUpon>
</Compile>
<Compile Include="Source\Collections\MultiDictionary.Test.cs">
<DependentUpon>MultiDictionary.cs</DependentUpon>
</Compile>
<Compile Include="Source\Collections\ObservableCollection.cs" />
<Compile Include="Source\Collections\ObservableCollection.Test.cs">
<DependentUpon>ObservableCollection.cs</DependentUpon>
@ -377,6 +388,9 @@
<Link>Foundation.snk</Link>
</None>
</ItemGroup>
<ItemGroup>
<Folder Include="Source\Cloning\" />
</ItemGroup>
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
<!-- To modify your build process, add your task inside one of the targets below and uncomment it.
Other similar extension points exist, see Microsoft.Common.targets.

13
Nuclex.Support (xna-4.0-phone7).csproj
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@ -22,7 +22,7 @@
<DebugType>full</DebugType>
<Optimize>false</Optimize>
<OutputPath>bin\xna-4.0-phone7\Debug\</OutputPath>
<DefineConstants>TRACE;DEBUG;WINDOWS_PHONE;NO_CLONING;NO_SERIALIZATION;NO_XMLSCHEMA;NO_SYSTEMEVENTS;NO_EXITCONTEXT</DefineConstants>
<DefineConstants>TRACE;DEBUG;WINDOWS_PHONE;NO_CLONING;NO_SERIALIZATION;NO_XMLSCHEMA;NO_SYSTEMEVENTS;NO_EXITCONTEXT;NO_SPECIALIZED_COLLECTIONS</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
<NoStdLib>true</NoStdLib>
@ -107,12 +107,23 @@
<Compile Include="Source\Collections\Deque.Test.cs">
<DependentUpon>Deque.cs</DependentUpon>
</Compile>
<Compile Include="Source\Collections\IMultiDictionary.cs" />
<Compile Include="Source\Collections\IObservableCollection.cs" />
<Compile Include="Source\Collections\IRecyclable.cs" />
<Compile Include="Source\Collections\ItemEventArgs.cs" />
<Compile Include="Source\Collections\ItemEventArgs.Test.cs">
<DependentUpon>ItemEventArgs.cs</DependentUpon>
</Compile>
<Compile Include="Source\Collections\MultiDictionary.cs" />
<Compile Include="Source\Collections\MultiDictionary.ValueCollection.cs">
<DependentUpon>MultiDictionary.cs</DependentUpon>
</Compile>
<Compile Include="Source\Collections\MultiDictionary.Interfaces.cs">
<DependentUpon>MultiDictionary.cs</DependentUpon>
</Compile>
<Compile Include="Source\Collections\MultiDictionary.Test.cs">
<DependentUpon>MultiDictionary.cs</DependentUpon>
</Compile>
<Compile Include="Source\Collections\ObservableCollection.cs" />
<Compile Include="Source\Collections\ObservableCollection.Test.cs">
<DependentUpon>ObservableCollection.cs</DependentUpon>

13
Nuclex.Support (xna-4.0-xbox360).csproj
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@ -22,7 +22,7 @@
<DebugType>full</DebugType>
<Optimize>false</Optimize>
<OutputPath>bin\xna-4.0-xbox360\Debug\</OutputPath>
<DefineConstants>TRACE;DEBUG;XBOX;XBOX360;NO_CLONING;NO_SERIALIZATION;NO_XMLSCHEMA;NO_SYSTEMEVENTS;NO_EXITCONTEXT</DefineConstants>
<DefineConstants>TRACE;DEBUG;XBOX;XBOX360;NO_CLONING;NO_SERIALIZATION;NO_XMLSCHEMA;NO_SYSTEMEVENTS;NO_EXITCONTEXT;NO_SPECIALIZED_COLLECTIONS</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
<NoStdLib>true</NoStdLib>
@ -118,12 +118,23 @@
<Compile Include="Source\Collections\Deque.Test.cs">
<DependentUpon>Deque.cs</DependentUpon>
</Compile>
<Compile Include="Source\Collections\IMultiDictionary.cs" />
<Compile Include="Source\Collections\IObservableCollection.cs" />
<Compile Include="Source\Collections\IRecyclable.cs" />
<Compile Include="Source\Collections\ItemEventArgs.cs" />
<Compile Include="Source\Collections\ItemEventArgs.Test.cs">
<DependentUpon>ItemEventArgs.cs</DependentUpon>
</Compile>
<Compile Include="Source\Collections\MultiDictionary.cs" />
<Compile Include="Source\Collections\MultiDictionary.ValueCollection.cs">
<DependentUpon>MultiDictionary.cs</DependentUpon>
</Compile>
<Compile Include="Source\Collections\MultiDictionary.Interfaces.cs">
<DependentUpon>MultiDictionary.cs</DependentUpon>
</Compile>
<Compile Include="Source\Collections\MultiDictionary.Test.cs">
<DependentUpon>MultiDictionary.cs</DependentUpon>
</Compile>
<Compile Include="Source\Collections\ObservableCollection.cs" />
<Compile Include="Source\Collections\ObservableCollection.Test.cs">
<DependentUpon>ObservableCollection.cs</DependentUpon>

68
Source/Collections/IMultiDictionary.cs Normal file
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@ -0,0 +1,68 @@
#region CPL License
/*
Nuclex Framework
Copyright (C) 2002-2010 Nuclex Development Labs
This library is free software; you can redistribute it and/or
modify it under the terms of the IBM Common Public License as
published by the IBM Corporation; either version 1.0 of the
License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
IBM Common Public License for more details.
You should have received a copy of the IBM Common Public
License along with this library
*/
#endregion
using System;
using System.Collections;
using System.Collections.Generic;
namespace Nuclex.Support.Collections {
/// <summary>
/// Associative collection that can store several values under one key and vice versa
/// </summary>
/// <typeparam name="TKey">Type of keys used within the dictionary</typeparam>
/// <typeparam name="TValue">Type of values stored in the dictionary</typeparam>
public interface IMultiDictionary<TKey, TValue> :
IDictionary<TKey, ICollection<TValue>>,
IDictionary,
ICollection<KeyValuePair<TKey, TValue>>,
IEnumerable<KeyValuePair<TKey, TValue>>,
IEnumerable {
/// <summary>Adds a value into the dictionary under the provided key</summary>
/// <param name="key">Key the value will be stored under</param>
/// <param name="value">Value that will be stored under the specified key</param>
void Add(TKey key, TValue value);
/// <summary>Determines the number of values stored under the specified key</summary>
/// <param name="key">Key whose values will be counted</param>
/// <returns>The number of values stored under the specified key</returns>
int CountValues(TKey key);
/// <summary>
/// Removes the item with the specified key and value from the dictionary
/// </summary>
/// <param name="key">Key of the item that will be removed</param>
/// <param name="value">Value of the item that will be removed</param>
/// <returns>
/// True if the specified item was contained in the dictionary and was removed
/// </returns>
/// <exception cref="NotSupportedException">If the dictionary is read-only</exception>
bool Remove(TKey key, TValue value);
/// <summary>Removes all items with the specified key from the dictionary</summary>
/// <param name="key">Key of the item that will be removed</param>
/// <returns>The number of items that have been removed from the dictionary</returns>
/// <exception cref="NotSupportedException">If the dictionary is read-only</exception>
int RemoveKey(TKey key);
}
} // namespace Nuclex.Support.Collections

248
Source/Collections/MultiDictionary.Interfaces.cs Normal file
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@ -0,0 +1,248 @@
#region CPL License
/*
Nuclex Framework
Copyright (C) 2002-2010 Nuclex Development Labs
This library is free software; you can redistribute it and/or
modify it under the terms of the IBM Common Public License as
published by the IBM Corporation; either version 1.0 of the
License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
IBM Common Public License for more details.
You should have received a copy of the IBM Common Public
License along with this library
*/
#endregion
using System;
using System.Collections;
using System.Collections.Generic;
namespace Nuclex.Support.Collections {
partial class MultiDictionary<TKey, TValue> {
#region IEnumerable implementation
/// <summary>Returns a new object enumerator for the Dictionary</summary>
/// <returns>The new object enumerator</returns>
IEnumerator IEnumerable.GetEnumerator() {
return GetEnumerator();
}
#endregion
#region IDictionary implementation
/// <summary>Adds an item into the dictionary</summary>
/// <param name="key">Key under which the item will be added</param>
/// <param name="value">Item that will be added</param>
void IDictionary.Add(object key, object value) {
Add((TKey)key, (TValue)value);
}
/// <summary>Determines whether the specified key exists in the dictionary</summary>
/// <param name="key">Key that will be checked for</param>
/// <returns>True if an item with the specified key exists in the dictionary</returns>
bool IDictionary.Contains(object key) {
return this.objectDictionary.Contains(key);
}
/// <summary>Returns a new entry enumerator for the dictionary</summary>
/// <returns>The new entry enumerator</returns>
IDictionaryEnumerator IDictionary.GetEnumerator() {
return new Enumerator(this);
}
/// <summary>Whether the size of the dictionary is fixed</summary>
bool IDictionary.IsFixedSize {
get { return this.objectDictionary.IsFixedSize; }
}
/// <summary>Returns a collection of all keys in the dictionary</summary>
ICollection IDictionary.Keys {
get { return this.objectDictionary.Keys; }
}
/// <summary>Returns a collection of all values stored in the dictionary</summary>
ICollection IDictionary.Values {
get {
if(this.valueCollection == null) {
this.valueCollection = new ValueCollection(this);
}
return this.valueCollection;
}
}
/// <summary>Removes an item from the dictionary</summary>
/// <param name="key">Key of the item that will be removed</param>
void IDictionary.Remove(object key) {
RemoveKey((TKey)key);
}
/// <summary>Accesses an item in the dictionary by its key</summary>
/// <param name="key">Key of the item that will be accessed</param>
/// <returns>The item with the specified key</returns>
object IDictionary.this[object key] {
get { return this.objectDictionary[key]; }
set { this[(TKey)key] = (ICollection<TValue>)value; }
}
#endregion
#region ICollection<KeyValuePair<TKey, TValue>> implementation
/// <summary>Inserts an already prepared element into the dictionary</summary>
/// <param name="item">Prepared element that will be added to the dictionary</param>
void ICollection<KeyValuePair<TKey, TValue>>.Add(
KeyValuePair<TKey, TValue> item
) {
Add(item.Key, item.Value);
}
/// <summary>Removes all items from the dictionary</summary>
/// <param name="itemToRemove">Item that will be removed from the dictionary</param>
bool ICollection<KeyValuePair<TKey, TValue>>.Remove(
KeyValuePair<TKey, TValue> itemToRemove
) {
ICollection<TValue> values;
if(!this.typedDictionary.TryGetValue(itemToRemove.Key, out values)) {
return false;
}
if(values.Remove(itemToRemove.Value)) {
if(values.Count == 0) {
this.typedDictionary.Remove(itemToRemove.Key);
}
OnRemoved(itemToRemove);
return true;
} else {
return false;
}
}
#endregion
#region ICollection implementation
/// <summary>Copies the contents of the Dictionary into an array</summary>
/// <param name="array">Array the Dictionary contents will be copied into</param>
/// <param name="arrayIndex">
/// Starting index at which to begin filling the destination array
/// </param>
void ICollection.CopyTo(Array array, int arrayIndex) {
foreach(KeyValuePair<TKey, ICollection<TValue>> item in this.typedDictionary) {
foreach(TValue value in item.Value) {
array.SetValue(new KeyValuePair<TKey, TValue>(item.Key, value), arrayIndex);
++arrayIndex;
}
}
}
/// <summary>Whether the Dictionary is synchronized for multi-threaded usage</summary>
bool ICollection.IsSynchronized {
get { return this.objectDictionary.IsSynchronized; }
}
/// <summary>Synchronization root on which the Dictionary locks</summary>
object ICollection.SyncRoot {
get { return this.objectDictionary.SyncRoot; }
}
#endregion
#region IDictionary<TKey, ICollection<TValue>> implementation
/// <summary>Adds a series of values to a dictionary</summary>
/// <param name="key">Key under which the values will be added</param>
/// <param name="values">Values that will be added to the dictionary</param>
void IDictionary<TKey, ICollection<TValue>>.Add(TKey key, ICollection<TValue> values) {
ICollection<TValue> currentValues;
if(!this.typedDictionary.TryGetValue(key, out currentValues)) {
currentValues = new ValueList(this);
}
foreach(TValue value in values) {
currentValues.Add(value);
}
}
/// <summary>Removes all values with the specified key</summary>
/// <param name="key">Key whose associated entries will be removed</param>
/// <returns>True if at least one entry has been removed from the dictionary</returns>
bool IDictionary<TKey, ICollection<TValue>>.Remove(TKey key) {
return (RemoveKey(key) > 0);
}
/// <summary>Returns a collection of value collections</summary>
ICollection<ICollection<TValue>> IDictionary<TKey, ICollection<TValue>>.Values {
get { return this.typedDictionary.Values; }
}
#endregion // IDictionary<TKey, ICollection<TValue>> implementation
#region ICollection<KeyValuePair<TKey, ICollection<TValue>>> implementation
/// <summary>Adds a series of values to a dictionary</summary>
/// <param name="item">Entry containing the values that will be added</param>
void ICollection<KeyValuePair<TKey, ICollection<TValue>>>.Add(
KeyValuePair<TKey, ICollection<TValue>> item
) {
ICollection<TValue> currentValues;
if(!this.typedDictionary.TryGetValue(item.Key, out currentValues)) {
currentValues = new ValueList(this);
}
foreach(TValue value in item.Value) {
currentValues.Add(value);
}
}
/// <summary>
/// Checks whether the dictionary contains the specified key/value pair
/// </summary>
/// <param name="item">Key/value pair for which the dictionary will be checked</param>
/// <returns>True if the dictionary contains the specified key/value pair</returns>
bool ICollection<KeyValuePair<TKey, ICollection<TValue>>>.Contains(
KeyValuePair<TKey, ICollection<TValue>> item
) {
return this.typedDictionary.Contains(item);
}
/// <summary>Copies the contents of the dictionary into an array</summary>
/// <param name="array"></param>
/// <param name="arrayIndex"></param>
void ICollection<KeyValuePair<TKey, ICollection<TValue>>>.CopyTo(
KeyValuePair<TKey, ICollection<TValue>>[] array, int arrayIndex
) {
this.typedDictionary.CopyTo(array, arrayIndex);
}
/// <summary>Removes the specified key/value pair from the dictionary</summary>
/// <param name="item">Key/value pair that will be removed</param>
/// <returns>True if the key/value pair was contained in the dictionary</returns>
bool ICollection<KeyValuePair<TKey, ICollection<TValue>>>.Remove(
KeyValuePair<TKey, ICollection<TValue>> item
) {
return this.typedDictionary.Remove(item);
}
/// <summary>Returns an enumerator for the dictionary</summary>
/// <returns>An enumerator for the key/value pairs in the dictionary</returns>
IEnumerator<KeyValuePair<TKey, ICollection<TValue>>> IEnumerable<
KeyValuePair<TKey, ICollection<TValue>>
>.GetEnumerator() {
return this.typedDictionary.GetEnumerator();
}
#endregion // ICollection<KeyValuePair<TKey, ICollection<TValue>>> implementation
}
} // namespace Nuclex.Support.Collections

146
Source/Collections/MultiDictionary.Test.cs Normal file
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@ -0,0 +1,146 @@
#region CPL License
/*
Nuclex Framework
Copyright (C) 2002-2010 Nuclex Development Labs
This library is free software; you can redistribute it and/or
modify it under the terms of the IBM Common Public License as
published by the IBM Corporation; either version 1.0 of the
License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
IBM Common Public License for more details.
You should have received a copy of the IBM Common Public
License along with this library
*/
#endregion
using System;
using System.Collections.Generic;
#if UNITTEST
using NUnit.Framework;
using NMock;
namespace Nuclex.Support.Collections {
/// <summary>Unit tests for the multi dictionary</summary>
[TestFixture]
public class MultiDictionaryTest {
/// <summary>
/// Verifies that new instances of the multi dictionary can be created
/// </summary>
[Test]
public void CanConstructNewDictionary() {
var dictionary = new MultiDictionary<int, string>();
Assert.IsNotNull(dictionary); // nonsense, prevents compiler warning
}
/// <summary>
/// Verifies that a new multi dictionary based on a read-only dictionary is
/// also read-only
/// </summary>
[Test]
public void IsReadOnlyWhenBasedOnReadOnlyContainer() {
var readOnly = new ReadOnlyDictionary<int, ICollection<string>>(
new Dictionary<int, ICollection<string>>()
);
var dictionary = new MultiDictionary<int, string>(readOnly);
Assert.IsTrue(dictionary.IsReadOnly);
}
/// <summary>
/// Ensures that the multi dictionary can contain the same key multiple times
/// (or in other words, multiple values on the same key)
/// </summary>
[Test]
public void CanContainKeyMultipleTimes() {
var dictionary = new MultiDictionary<int, string>();
dictionary.Add(123, "one two three");
dictionary.Add(123, "eins zwei drei");
Assert.AreEqual(2, dictionary.Count);
CollectionAssert.AreEquivalent(
new KeyValuePair<int, string>[] {
new KeyValuePair<int, string>(123, "one two three"),
new KeyValuePair<int, string>(123, "eins zwei drei")
},
dictionary
);
}
/// <summary>
/// Verifies that adding values through the indexer still updates the item count
/// </summary>
[Test]
public void AddingValuesFromIndexerUpdatesCount() {
var dictionary = new MultiDictionary<int, string>();
dictionary.Add(42, "the answer to everything");
dictionary[42].Add("21x2");
Assert.AreEqual(2, dictionary.Count);
CollectionAssert.AreEquivalent(
new KeyValuePair<int, string>[] {
new KeyValuePair<int, string>(42, "the answer to everything"),
new KeyValuePair<int, string>(42, "21x2")
},
dictionary
);
}
/// <summary>
/// Tests whether the collection can count the number of values stored
/// under a key
/// </summary>
[Test]
public void ValuesWithSameKeyCanBeCounted() {
var dictionary = new MultiDictionary<int, string>();
dictionary.Add(10, "ten");
dictionary.Add(20, "twenty");
dictionary.Add(30, "thirty");
dictionary.Add(10, "zehn");
dictionary.Add(20, "zwanzig");
dictionary.Add(10, "dix");
Assert.AreEqual(6, dictionary.Count);
Assert.AreEqual(3, dictionary.CountValues(10));
Assert.AreEqual(2, dictionary.CountValues(20));
Assert.AreEqual(1, dictionary.CountValues(30));
}
/// <summary>
/// Ensures that its possible to remove values individually without affecting
/// other values stored under the same key
/// </summary>
[Test]
public void ValuesCanBeRemovedIndividually() {
var dictionary = new MultiDictionary<int, string>();
dictionary.Add(10, "ten");
dictionary.Add(10, "zehn");
dictionary.Add(10, "dix");
dictionary.Remove(10, "zehn");
Assert.AreEqual(2, dictionary.Count);
CollectionAssert.AreEquivalent(
new KeyValuePair<int, string>[] {
new KeyValuePair<int, string>(10, "ten"),
new KeyValuePair<int, string>(10, "dix")
},
dictionary
);
}
}
} // namespace Nuclex.Support.Collections
#endif // UNITTEST

269
Source/Collections/MultiDictionary.ValueCollection.cs Normal file
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#region CPL License
/*
Nuclex Framework
Copyright (C) 2002-2010 Nuclex Development Labs
This library is free software; you can redistribute it and/or
modify it under the terms of the IBM Common Public License as
published by the IBM Corporation; either version 1.0 of the
License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
IBM Common Public License for more details.
You should have received a copy of the IBM Common Public
License along with this library
*/
#endregion
using System;
using System.Collections.Generic;
using System.Collections;
namespace Nuclex.Support.Collections {
partial class MultiDictionary<TKey, TValue> {
/// <summary>
/// Provides access to the values stored in a multi dictionary as a collection
/// </summary>
private class ValueCollection : ICollection<TValue>, ICollection {
#region class Enumerator
/// <summary>Enumerates the values stored in a multi dictionary</summary>
private class Enumerator : IEnumerator<TValue> {
/// <summary>Initializes a new enumerator</summary>
/// <param name="valueCollections">Value collections being enumerated</param>
public Enumerator(ICollection<ICollection<TValue>> valueCollections) {
this.valueCollections = valueCollections;
Reset();
}
/// <summary>Immediately releases all resources owned by the instance</summary>
public void Dispose() {
if(this.currentValue != null) {
this.currentValue.Dispose();
this.currentValue = null;
}
if(this.currentCollection != null) {
this.currentCollection.Dispose();
this.currentCollection = null;
}
}
/// <summary>The current value the enumerator is pointing at</summary>
public TValue Current {
get {
if(this.currentValue == null) {
throw new InvalidOperationException("Enumerator is not on a valid position");
}
return this.currentValue.Current;
}
}
/// <summary>Advances the enumerator to the next item</summary>
/// <returns>
/// True if there was a next item, false if the enumerator reached the end
/// </returns>
public bool MoveNext() {
if(this.currentCollection == null) {
return false;
}
for(; ; ) {
// Try to move the enumerator in the current key's list to the next item
if(this.currentValue != null) {
if(this.currentValue.MoveNext()) {
return true; // We found the next item
} else {
this.currentValue.Dispose();
}
}
// Enumerator for the current key's list reached the end, go to the next key
if(this.currentCollection.MoveNext()) {
this.currentValue = this.currentCollection.Current.GetEnumerator();
} else {
this.currentValue = null; // Guaranteed to be disposed already
this.currentCollection.Dispose();
this.currentCollection = null;
return false;
}
}
}
/// <summary>Resets the enumerator to its initial position</summary>
public void Reset() {
if(this.currentValue != null) {
this.currentValue.Dispose();
this.currentValue = null;
}
if(this.currentCollection != null) {
this.currentCollection.Dispose();
}
this.currentCollection = valueCollections.GetEnumerator();
}
#region IEnumerator implementation
/// <summary>The current entry the enumerator is pointing at</summary>
object IEnumerator.Current {
get { return Current; }
}
#endregion // IEnumerator implementation
/// <summary>Value collections being enumerated</summary>
private ICollection<ICollection<TValue>> valueCollections;
/// <summary>The current value collection the enumerator is in</summary>
private IEnumerator<ICollection<TValue>> currentCollection;
/// <summary>Current value in the collection the enumerator is in</summary>
private IEnumerator<TValue> currentValue;
}
#endregion // class Enumerator
/// <summary>Initializes a new multi dictionary value collection</summary>
/// <param name="dictionary">Dictionary whose values the collection represents</param>
public ValueCollection(MultiDictionary<TKey, TValue> dictionary) {
this.dictionary = dictionary;
this.dictionaryAsICollection = (ICollection)dictionary;
}
/// <summary>Determines whether the collection contains a specific value</summary>
/// <param name="item">Value for which the collection will be checked</param>
/// <returns>True if the collection contains the specified value</returns>
public bool Contains(TValue item) {
foreach(ICollection<TValue> values in this.dictionary.Values) {
if(values.Contains(item)) {
return true;
}
}
return false;
}
/// <summary>Copies the contents of the collection into an array</summary>
/// <param name="array">Array the collection contents will be copied into</param>
/// <param name="arrayIndex">
/// Starting index in the array where writing will begin
/// </param>
public void CopyTo(TValue[] array, int arrayIndex) {
foreach(ICollection<TValue> values in this.dictionary.Values) {
foreach(TValue value in values) {
array[arrayIndex] = value;
++arrayIndex;
}
}
}
/// <summary>The number of values in the collection</summary>
public int Count {
get { return this.dictionary.count; }
}
/// <summary>Always true since the value collection is read-only</summary>
public bool IsReadOnly {
get { return true; }
}
/// <summary>Returns a new enumerator for the value collection</summary>
/// <returns>A new enumerator for the value collection</returns>
public IEnumerator<TValue> GetEnumerator() {
return new Enumerator(this.dictionary.typedDictionary.Values);
}
#region IEnumerator implementation
/// <summary>Returns a non-typesafe enumerator for the collection</summary>
/// <returns>The non-typesafe collection enumerator</returns>
IEnumerator IEnumerable.GetEnumerator() {
return GetEnumerator();
}
#endregion // IEnumerator implementation
#region ICollection<> implementation
/// <summary>Throws a NotSupportedException</summary>
/// <param name="item">Not used</param>
void ICollection<TValue>.Add(TValue item) {
throw new NotSupportedException(
"Items cannot be added to a dictionary through its values collection"
);
}
/// <summary>Throws a NotSupportedException</summary>
void ICollection<TValue>.Clear() {
throw new NotSupportedException(
"The values collection of a dictionary cannot be cleared"
);
}
/// <summary>Throws a NotSupportedException</summary>
/// <param name="item">Not used</param>
/// <returns>Nothing, since the method always throws an exception</returns>
bool ICollection<TValue>.Contains(TValue item) {
throw new NotImplementedException();
}
/// <summary>Not supported</summary>
/// <param name="item">Item that will not be removed</param>
/// <returns>Nothing because the method throws an exception</returns>
bool ICollection<TValue>.Remove(TValue item) {
throw new NotSupportedException(
"Items cannot be removed from a dictionary through its values collection"
);
}
#endregion ICollection<> implementation
#region ICollection implementation
/// <summary>Copies the contents of the collection into an array</summary>
/// <param name="array">Array the collection's contents are copied into</param>
/// <param name="arrayIndex">
/// Starting index in the array where writing will begin
/// </param>
void ICollection.CopyTo(Array array, int arrayIndex) {
foreach(ICollection<TValue> values in this.dictionary.Values) {
foreach(TValue value in values) {
array.SetValue(value, arrayIndex);
++arrayIndex;
}
}
}
/// <summary>Whether the dictionary is thread-safe</summary>
bool ICollection.IsSynchronized {
get { return this.dictionaryAsICollection.IsSynchronized; }
}
/// <summary>
/// The synchronization root used by the dictionary for thread synchronization
/// </summary>
object ICollection.SyncRoot {
get { return this.dictionaryAsICollection.IsSynchronized; }
}
#endregion // ICollection implementation
/// <summary>Dictionary whose values the collection represents</summary>
private MultiDictionary<TKey, TValue> dictionary;
/// <summary>The dictionary under its ICollection interface</summary>
private ICollection dictionaryAsICollection;
}
}
} // namespace Nuclex.Support.Collections

436
Source/Collections/MultiDictionary.cs Normal file
View File

@ -0,0 +1,436 @@
#region CPL License
/*
Nuclex Framework
Copyright (C) 2002-2010 Nuclex Development Labs
This library is free software; you can redistribute it and/or
modify it under the terms of the IBM Common Public License as
published by the IBM Corporation; either version 1.0 of the
License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
IBM Common Public License for more details.
You should have received a copy of the IBM Common Public
License along with this library
*/
#endregion
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
namespace Nuclex.Support.Collections {
/// <summary>Dictionary that can contain multiple values under the same key</summary>
/// <typeparam name="TKey">Type of keys used within the dictionary</typeparam>
/// <typeparam name="TValue">Type of values used within the dictionary</typeparam>
public partial class MultiDictionary<TKey, TValue> : IMultiDictionary<TKey, TValue> {
#region class Enumerator
/// <summary>Enumerates the values stored in a multi dictionary</summary>
private class Enumerator :
IEnumerator<KeyValuePair<TKey, TValue>>, IDictionaryEnumerator {
/// <summary>Initializes a new multi dictionary enumerator</summary>
/// <param name="dictionary">Dictionary that will be enumerated</param>
public Enumerator(MultiDictionary<TKey, TValue> dictionary) {
this.dictionary = dictionary;
Reset();
}
/// <summary>The current entry the enumerator is pointing at</summary>
public KeyValuePair<TKey, TValue> Current {
get {
if(this.currentValue == null) {
throw new InvalidOperationException("Enumerator is not on a valid position");
}
return new KeyValuePair<TKey, TValue>(
this.currentCollection.Current.Key, this.currentValue.Current
);
}
}
/// <summary>Immediately releases all resources owned by the instance</summary>
public void Dispose() {
if(this.currentValue != null) {
this.currentValue.Dispose();
this.currentValue = null;
}
if(this.currentCollection != null) {
this.currentCollection.Dispose();
this.currentCollection = null;
}
}
/// <summary>Advances the enumerator to the entry</summary>
/// <returns>
/// True if there was a next entry, false if the end of the set has been reached
/// </returns>
public bool MoveNext() {
if(this.currentCollection == null) {
return false;
}
for(; ; ) {
// Try to move the enumerator in the current key's list to the next item
if(this.currentValue != null) {
if(this.currentValue.MoveNext()) {
return true; // We found the next item
} else {
this.currentValue.Dispose();
}
}
// Enumerator for the current key's list reached the end, go to the next key
if(this.currentCollection.MoveNext()) {
this.currentValue = this.currentCollection.Current.Value.GetEnumerator();
} else {
this.currentValue = null; // Guaranteed to be disposed already
this.currentCollection.Dispose();
this.currentCollection = null;
return false;
}
}
}
/// <summary>Resets the enumerator to its initial position</summary>
public void Reset() {
if(this.currentValue != null) {
this.currentValue.Dispose();
this.currentValue = null;
}
if(this.currentCollection != null) {
this.currentCollection.Dispose();
}
this.currentCollection = this.dictionary.GetEnumerator();
}
#region IEnumerator implementation
/// <summary>The item the enumerator is currently pointing at</summary>
object IEnumerator.Current {
get { return Current; }
}
#endregion // IEnumerator implementation
#region IDictionaryEnumerator implementation
/// <summary>The current entry the enumerator is pointing to</summary>
DictionaryEntry IDictionaryEnumerator.Entry {
get {
enforceEnumeratorOnValidPosition();
return new DictionaryEntry(
this.currentCollection.Current.Key, this.currentValue.Current
);
}
}
/// <summary>
/// Throws an exception if the enumerator is not on a valid position
/// </summary>
private void enforceEnumeratorOnValidPosition() {
if(this.currentValue == null) {
throw new InvalidOperationException("Enumerator is not on a valid position");
}
}
/// <summary>The current dictionary key</summary>
object IDictionaryEnumerator.Key {
get {
enforceEnumeratorOnValidPosition();
return this.currentCollection.Current.Key;
}
}
/// <summary>The current dictionary value</summary>
object IDictionaryEnumerator.Value {
get {
enforceEnumeratorOnValidPosition();
return this.currentValue.Current;
}
}
#endregion // IDictionaryEnumerator implementation
/// <summary>Dictionary over whose entries the enumerator is enumerating</summary>
private IDictionary<TKey, ICollection<TValue>> dictionary;
/// <summary>Current key the enumerator is at</summary>
private IEnumerator<KeyValuePair<TKey, ICollection<TValue>>> currentCollection;
/// <summary>Current value in the current key the enumerator is at</summary>
private IEnumerator<TValue> currentValue;
}
#endregion // class Enumerator
#region class ValueList
/// <summary>Stores the list of values for a dictionary key</summary>
private class ValueList : Collection<TValue> {
/// <summary>Initializes a new value list</summary>
/// <param name="dictionary">Dictionary the value list belongs to</param>
public ValueList(MultiDictionary<TKey, TValue> dictionary) {
this.dictionary = dictionary;
}
/// <summary>Called when the value list is being cleared</summary>
protected override void ClearItems() {
this.dictionary.count -= Count;
base.ClearItems();
}
/// <summary>Called when an item is inserted into the value list</summary>
/// <param name="index">Index at which the item is being inserted</param>
/// <param name="item">Item that is being inserted</param>
protected override void InsertItem(int index, TValue item) {
base.InsertItem(index, item);
++this.dictionary.count;
}
/// <summary>Called when an item is removed from the value list</summary>
/// <param name="index">Index at which the item is being removed</param>
protected override void RemoveItem(int index) {
base.RemoveItem(index);
--this.dictionary.count;
}
/// <summary>The dictionary the value list belongs to</summary>
private MultiDictionary<TKey, TValue> dictionary;
}
#endregion // class ValueList
/// <summary>Initializes a new multi dictionary</summary>
public MultiDictionary() : this(new Dictionary<TKey, ICollection<TValue>>()) { }
/// <summary>Initializes a new multi dictionary</summary>
/// <param name="dictionary">Dictionary the multi dictionary will be based on</param>
internal MultiDictionary(IDictionary<TKey, ICollection<TValue>> dictionary) {
this.typedDictionary = dictionary;
this.objectDictionary = (this.typedDictionary as IDictionary);
foreach(ICollection<TValue> values in dictionary.Values) {
this.count += values.Count;
}
}
/// <summary>Whether the dictionary is write-protected</summary>
public bool IsReadOnly {
get { return this.typedDictionary.IsReadOnly; }
}
/// <summary>Determines the number of values stored under the specified key</summary>
/// <param name="key">Key whose values will be counted</param>
/// <returns>The number of values stored under the specified key</returns>
public int CountValues(TKey key) {
ICollection<TValue> values;
if(this.typedDictionary.TryGetValue(key, out values)) {
return values.Count;
} else {
return 0;
}
}
/// <summary>
/// Determines whether the specified KeyValuePair is contained in the dictionary
/// </summary>
/// <param name="item">KeyValuePair that will be checked for</param>
/// <returns>True if the provided KeyValuePair was contained in the dictionary</returns>
public bool Contains(KeyValuePair<TKey, TValue> item) {
ICollection<TValue> values;
if(this.typedDictionary.TryGetValue(item.Key, out values)) {
return values.Contains(item.Value);
} else {
return false;
}
}
/// <summary>Determines whether the Dictionary contains the specified key</summary>
/// <param name="key">Key that will be checked for</param>
/// <returns>
/// True if an entry with the specified key was contained in the Dictionary
/// </returns>
public bool ContainsKey(TKey key) {
return this.typedDictionary.ContainsKey(key);
}
/// <summary>Copies the contents of the Dictionary into an array</summary>
/// <param name="array">Array the Dictionary will be copied into</param>
/// <param name="arrayIndex">
/// Starting index at which to begin filling the destination array
/// </param>
public void CopyTo(KeyValuePair<TKey, TValue>[] array, int arrayIndex) {
foreach(KeyValuePair<TKey, ICollection<TValue>> item in this.typedDictionary) {
foreach(TValue value in item.Value) {
array[arrayIndex] = new KeyValuePair<TKey, TValue>(item.Key, value);
++arrayIndex;
}
}
}
/// <summary>Number of elements contained in the Dictionary</summary>
public int Count {
get { return this.count; }
}
/// <summary>Creates a new enumerator for the dictionary</summary>
/// <returns>The new dictionary enumerator</returns>
public IEnumerator<KeyValuePair<TKey, TValue>> GetEnumerator() {
return new Enumerator(this);
}
/// <summary>Collection of all keys contained in the dictionary</summary>
public ICollection<TKey> Keys {
get { return this.typedDictionary.Keys; }
}
/// <summary>Collection of all values contained in the dictionary</summary>
public ICollection<TValue> Values {
get {
if(this.valueCollection == null) {
this.valueCollection = new ValueCollection(this);
}
return this.valueCollection;
}
}
/// <summary>
/// Attempts to retrieve the item with the specified key from the dictionary
/// </summary>
/// <param name="key">Key of the item to attempt to retrieve</param>
/// <param name="values">
/// Output parameter that will receive the values upon successful completion
/// </param>
/// <returns>
/// True if the item was found and has been placed in the output parameter
/// </returns>
public bool TryGetValue(TKey key, out ICollection<TValue> values) {
return this.typedDictionary.TryGetValue(key, out values);
}
/// <summary>Accesses an item in the dictionary by its key</summary>
/// <param name="key">Key of the item that will be accessed</param>
public ICollection<TValue> this[TKey key] {
get { return this.typedDictionary[key]; }
set {
ICollection<TValue> currentValues;
if(this.typedDictionary.TryGetValue(key, out currentValues)) {
currentValues.Clear();
} else {
currentValues = new ValueList(this);
this.typedDictionary.Add(key, currentValues);
}
foreach(TValue addedValue in value) {
currentValues.Add(addedValue);
OnAdded(new KeyValuePair<TKey, TValue>(key, addedValue));
}
}
}
/// <summary>Inserts an item into the dictionary</summary>
/// <param name="key">Key under which to add the new item</param>
/// <param name="value">Item that will be added to the dictionary</param>
public void Add(TKey key, TValue value) {
ICollection<TValue> values;
if(!this.typedDictionary.TryGetValue(key, out values)) {
values = new ValueList(this);
this.typedDictionary.Add(key, values);
}
values.Add(value);
OnAdded(new KeyValuePair<TKey, TValue>(key, value));
}
/// <summary>
/// Removes the item with the specified key and value from the dictionary
/// </summary>
/// <param name="key">Key of the item that will be removed</param>
/// <param name="value">Value of the item that will be removed</param>
/// <returns>
/// True if the specified item was contained in the dictionary and was removed
/// </returns>
/// <exception cref="NotSupportedException">If the dictionary is read-only</exception>
public bool Remove(TKey key, TValue value) {
ICollection<TValue> values;
if(this.typedDictionary.TryGetValue(key, out values)) {
values.Remove(value);
if(values.Count == 0) {
this.typedDictionary.Remove(key);
}
OnRemoved(new KeyValuePair<TKey, TValue>(key, value));
return true;
} else {
return false;
}
}
/// <summary>Removes all items with the specified key from the dictionary</summary>
/// <param name="key">Key of the item that will be removed</param>
/// <returns>The number of items that have been removed from the dictionary</returns>
/// <exception cref="NotSupportedException">If the dictionary is read-only</exception>
public int RemoveKey(TKey key) {
ICollection<TValue> values;
if(this.typedDictionary.TryGetValue(key, out values)) {
this.count -= values.Count;
this.typedDictionary.Remove(key);
foreach(TValue value in values) {
OnRemoved(new KeyValuePair<TKey, TValue>(key, value));
}
return values.Count;
} else {
return 0;
}
}
/// <summary>Removes all items from the Dictionary</summary>
public void Clear() {
OnClearing();
this.typedDictionary.Clear();
this.count = 0;
OnCleared();
}
/// <summary>Fires the 'ItemAdded' event</summary>
/// <param name="item">Item that has been added to the collection</param>
protected virtual void OnAdded(KeyValuePair<TKey, TValue> item) { }
/// <summary>Fires the 'ItemRemoved' event</summary>
/// <param name="item">Item that has been removed from the collection</param>
protected virtual void OnRemoved(KeyValuePair<TKey, TValue> item) { }
/// <summary>Fires the 'Clearing' event</summary>
protected virtual void OnClearing() { }
/// <summary>Fires the 'Cleared' event</summary>
protected virtual void OnCleared() { }
/// <summary>The wrapped Dictionary under its type-safe interface</summary>
private IDictionary<TKey, ICollection<TValue>> typedDictionary;
/// <summary>The wrapped Dictionary under its object interface</summary>
private IDictionary objectDictionary;
/// <summary>The number of items currently in the multi dictionary</summary>
private int count;
/// <summary>Provides the values stores in the dictionary in sequence</summary>
private ValueCollection valueCollection;
}
} // namespace Nuclex.Support.Collections

80
Source/Collections/ObservableCollection.cs
View File

@ -21,17 +21,25 @@ License along with this library
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
#if !NO_SPECIALIZED_COLLECTIONS
using System.Collections.Specialized;
#endif
namespace Nuclex.Support.Collections {
/// <summary>Collection which fires events when items are added or removed</summary>
public class ObservableCollection<ItemType> :
Collection<ItemType>, IObservableCollection<ItemType> {
/// <typeparam name="TItem">Type of items the collection manages</typeparam>
public class ObservableCollection<TItem> :
Collection<TItem>,
#if !NO_SPECIALIZED_COLLECTIONS
INotifyCollectionChanged,
#endif
IObservableCollection<TItem> {
/// <summary>Raised when an item has been added to the collection</summary>
public event EventHandler<ItemEventArgs<ItemType>> ItemAdded;
public event EventHandler<ItemEventArgs<TItem>> ItemAdded;
/// <summary>Raised when an item is removed from the collection</summary>
public event EventHandler<ItemEventArgs<ItemType>> ItemRemoved;
public event EventHandler<ItemEventArgs<TItem>> ItemRemoved;
/// <summary>Raised when the collection is about to be cleared</summary>
/// <remarks>
/// This could be covered by calling ItemRemoved for each item currently
@ -42,6 +50,11 @@ namespace Nuclex.Support.Collections {
/// <summary>Raised when the collection has been cleared</summary>
public event EventHandler Cleared;
#if !NO_SPECIALIZED_COLLECTIONS
/// <summary>Called when the collection has changed</summary>
public event NotifyCollectionChangedEventHandler CollectionChanged;
#endif
/// <summary>
/// Initializes a new instance of the ObservableCollection class that is empty.
/// </summary>
@ -52,18 +65,35 @@ namespace Nuclex.Support.Collections {
/// for the specified list.
/// </summary>
/// <param name="list">The list that is wrapped by the new collection.</param>
/// <exception cref="System.ArgumentNullException">
/// List is null.
/// </exception>
public ObservableCollection(IList<ItemType> list) : base(list) { }
/// <exception cref="System.ArgumentNullException">List is null</exception>
public ObservableCollection(IList<TItem> list) : base(list) { }
/// <summary>Removes all elements from the Collection</summary>
protected override void ClearItems() {
OnClearing();
base.ClearItems();
OnCleared();
#if !NO_SPECIALIZED_COLLECTIONS
OnCollectionChanged(NotifyCollectionChangedAction.Reset, default(TItem), -1);
#endif
}
#if !NO_SPECIALIZED_COLLECTIONS
/// <summary>Fires the CollectionChanged event</summary>
/// <param name="action">Type of change that has occured</param>
/// <param name="item">The item that has been added, removed or replaced</param>
/// <param name="index">Index of the changed item</param>
protected virtual void OnCollectionChanged(
NotifyCollectionChangedAction action, TItem item, int index
) {
if (CollectionChanged != null) {
CollectionChanged(
this, new NotifyCollectionChangedEventArgs(action, item, index)
);
}
}
#endif
/// <summary>
/// Inserts an element into the ObservableCollection at the specified index
/// </summary>
@ -71,9 +101,12 @@ namespace Nuclex.Support.Collections {
/// The object to insert. The value can be null for reference types.
/// </param>
/// <param name="item">The zero-based index at which item should be inserted</param>
protected override void InsertItem(int index, ItemType item) {
protected override void InsertItem(int index, TItem item) {
base.InsertItem(index, item);
OnAdded(item);
#if !NO_SPECIALIZED_COLLECTIONS
OnCollectionChanged(NotifyCollectionChangedAction.Add, item, index);
#endif
}
/// <summary>
@ -81,9 +114,12 @@ namespace Nuclex.Support.Collections {
/// </summary>
/// <param name="index">The zero-based index of the element to remove</param>
protected override void RemoveItem(int index) {
ItemType item = base[index];
TItem item = base[index];
base.RemoveItem(index);
OnRemoved(item);
#if !NO_SPECIALIZED_COLLECTIONS
OnCollectionChanged(NotifyCollectionChangedAction.Remove, item, index);
#endif
}
/// <summary>Replaces the element at the specified index</summary>
@ -92,39 +128,43 @@ namespace Nuclex.Support.Collections {
/// for reference types
/// </param>
/// <param name="item">The zero-based index of the element to replace</param>
protected override void SetItem(int index, ItemType item) {
ItemType oldItem = base[index];
protected override void SetItem(int index, TItem item) {
TItem oldItem = base[index];
base.SetItem(index, item);
OnRemoved(oldItem);
OnAdded(item);
#if !NO_SPECIALIZED_COLLECTIONS
OnCollectionChanged(NotifyCollectionChangedAction.Replace, item, index);
#endif
}
/// <summary>Fires the 'ItemAdded' event</summary>
/// <param name="item">Item that has been added to the collection</param>
protected virtual void OnAdded(ItemType item) {
if(ItemAdded != null)
ItemAdded(this, new ItemEventArgs<ItemType>(item));
protected virtual void OnAdded(TItem item) {
if (ItemAdded != null)
ItemAdded(this, new ItemEventArgs<TItem>(item));
}
/// <summary>Fires the 'ItemRemoved' event</summary>
/// <param name="item">Item that has been removed from the collection</param>
protected virtual void OnRemoved(ItemType item) {
if(ItemRemoved != null)
ItemRemoved(this, new ItemEventArgs<ItemType>(item));
protected virtual void OnRemoved(TItem item) {
if (ItemRemoved != null)
ItemRemoved(this, new ItemEventArgs<TItem>(item));
}
/// <summary>Fires the 'Clearing' event</summary>
protected virtual void OnClearing() {
if(Clearing != null)
if (Clearing != null)
Clearing(this, EventArgs.Empty);
}
/// <summary>Fires the 'Cleared' event</summary>
protected virtual void OnCleared() {
if(Cleared != null)
if (Cleared != null)
Cleared(this, EventArgs.Empty);
}
}
} // namespace Nuclex.Support.Collections

133
Source/Collections/ObservableDictionary.cs
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@ -19,27 +19,32 @@ License along with this library
#endregion
using System;
using System.Collections.Generic;
using System.Collections;
using System.Collections.ObjectModel;
using System.Collections.Generic;
#if !NO_SPECIALIZED_COLLECTIONS
using System.Collections.Specialized;
#endif
using System.Runtime.Serialization;
namespace Nuclex.Support.Collections {
/// <summary>A dictionary that sneds out change notifications</summary>
/// <typeparam name="KeyType">Type of the keys used in the dictionary</typeparam>
/// <typeparam name="ValueType">Type of the values used in the dictionary</typeparam>
/// <typeparam name="TKey">Type of the keys used in the dictionary</typeparam>
/// <typeparam name="TValue">Type of the values used in the dictionary</typeparam>
#if !NO_SERIALIZATION
[Serializable]
#endif
public class ObservableDictionary<KeyType, ValueType> :
public class ObservableDictionary<TKey, TValue> :
#if !NO_SERIALIZATION
ISerializable,
ISerializable,
IDeserializationCallback,
#endif
IDictionary<KeyType, ValueType>,
IDictionary<TKey, TValue>,
IDictionary,
IObservableCollection<KeyValuePair<KeyType, ValueType>> {
#if !NO_SPECIALIZED_COLLECTIONS
INotifyCollectionChanged,
#endif
IObservableCollection<KeyValuePair<TKey, TValue>> {
#if !NO_SERIALIZATION
#region class SerializedDictionary
@ -47,7 +52,7 @@ namespace Nuclex.Support.Collections {
/// <summary>
/// Dictionary wrapped used to reconstruct a serialized read only dictionary
/// </summary>
private class SerializedDictionary : Dictionary<KeyType, ValueType> {
private class SerializedDictionary : Dictionary<TKey, TValue> {
/// <summary>
/// Initializes a new instance of the System.WeakReference class, using deserialized
@ -70,23 +75,28 @@ namespace Nuclex.Support.Collections {
}
#endregion // class SerializedDictionary
#endif // !COMPACTFRAMEWORK
#endif // !NO_SERIALIZATION
/// <summary>Raised when an item has been added to the dictionary</summary>
public event EventHandler<ItemEventArgs<KeyValuePair<KeyType, ValueType>>> ItemAdded;
public event EventHandler<ItemEventArgs<KeyValuePair<TKey, TValue>>> ItemAdded;
/// <summary>Raised when an item is removed from the dictionary</summary>
public event EventHandler<ItemEventArgs<KeyValuePair<KeyType, ValueType>>> ItemRemoved;
public event EventHandler<ItemEventArgs<KeyValuePair<TKey, TValue>>> ItemRemoved;
/// <summary>Raised when the dictionary is about to be cleared</summary>
public event EventHandler Clearing;
/// <summary>Raised when the dictionary has been cleared</summary>
public event EventHandler Cleared;
#if !NO_SPECIALIZED_COLLECTIONS
/// <summary>Called when the collection has changed</summary>
public event NotifyCollectionChangedEventHandler CollectionChanged;
#endif
/// <summary>Initializes a new observable dictionary</summary>
public ObservableDictionary() : this(new Dictionary<KeyType, ValueType>()) { }
public ObservableDictionary() : this(new Dictionary<TKey, TValue>()) { }
/// <summary>Initializes a new observable Dictionary wrapper</summary>
/// <param name="dictionary">Dictionary that will be wrapped</param>
public ObservableDictionary(IDictionary<KeyType, ValueType> dictionary) {
public ObservableDictionary(IDictionary<TKey, TValue> dictionary) {
this.typedDictionary = dictionary;
this.objectDictionary = (this.typedDictionary as IDictionary);
}
@ -123,7 +133,7 @@ namespace Nuclex.Support.Collections {
/// </summary>
/// <param name="item">KeyValuePair that will be checked for</param>
/// <returns>True if the provided KeyValuePair was contained in the Dictionary</returns>
public bool Contains(KeyValuePair<KeyType, ValueType> item) {
public bool Contains(KeyValuePair<TKey, TValue> item) {
return this.typedDictionary.Contains(item);
}
@ -132,7 +142,7 @@ namespace Nuclex.Support.Collections {
/// <returns>
/// True if an entry with the specified key was contained in the Dictionary
/// </returns>
public bool ContainsKey(KeyType key) {
public bool ContainsKey(TKey key) {
return this.typedDictionary.ContainsKey(key);
}
@ -141,7 +151,7 @@ namespace Nuclex.Support.Collections {
/// <param name="arrayIndex">
/// Starting index at which to begin filling the destination array
/// </param>
public void CopyTo(KeyValuePair<KeyType, ValueType>[] array, int arrayIndex) {
public void CopyTo(KeyValuePair<TKey, TValue>[] array, int arrayIndex) {
this.typedDictionary.CopyTo(array, arrayIndex);
}
@ -152,17 +162,17 @@ namespace Nuclex.Support.Collections {
/// <summary>Creates a new enumerator for the Dictionary</summary>
/// <returns>The new Dictionary enumerator</returns>
public IEnumerator<KeyValuePair<KeyType, ValueType>> GetEnumerator() {
public IEnumerator<KeyValuePair<TKey, TValue>> GetEnumerator() {
return this.typedDictionary.GetEnumerator();
}
/// <summary>Collection of all keys contained in the Dictionary</summary>
public ICollection<KeyType> Keys {
public ICollection<TKey> Keys {
get { return this.typedDictionary.Keys; }
}
/// <summary>Collection of all values contained in the Dictionary</summary>
public ICollection<ValueType> Values {
public ICollection<TValue> Values {
get { return this.typedDictionary.Values; }
}
@ -176,46 +186,46 @@ namespace Nuclex.Support.Collections {
/// <returns>
/// True if the item was found and has been placed in the output parameter
/// </returns>
public bool TryGetValue(KeyType key, out ValueType value) {
public bool TryGetValue(TKey key, out TValue value) {
return this.typedDictionary.TryGetValue(key, out value);
}
/// <summary>Accesses an item in the Dictionary by its key</summary>
/// <param name="key">Key of the item that will be accessed</param>
public ValueType this[KeyType key] {
public TValue this[TKey key] {
get { return this.typedDictionary[key]; }
set {
bool removed;
ValueType oldValue;
TValue oldValue;
removed = this.typedDictionary.TryGetValue(key, out oldValue);
this.typedDictionary[key] = value;
if(removed) {
OnRemoved(new KeyValuePair<KeyType, ValueType>(key, oldValue));
OnRemoved(new KeyValuePair<TKey, TValue>(key, oldValue));
}
OnAdded(new KeyValuePair<KeyType, ValueType>(key, value));
OnAdded(new KeyValuePair<TKey, TValue>(key, value));
}
}
/// <summary>Inserts an item into the Dictionary</summary>
/// <param name="key">Key under which to add the new item</param>
/// <param name="value">Item that will be added to the Dictionary</param>
public void Add(KeyType key, ValueType value) {
public void Add(TKey key, TValue value) {
this.typedDictionary.Add(key, value);
OnAdded(new KeyValuePair<KeyType, ValueType>(key, value));
OnAdded(new KeyValuePair<TKey, TValue>(key, value));
}
/// <summary>Removes the item with the specified key from the Dictionary</summary>
/// <param name="key">Key of the elementes that will be removed</param>
/// <returns>True if an item with the specified key was found and removed</returns>
public bool Remove(KeyType key) {
ValueType oldValue;
public bool Remove(TKey key) {
TValue oldValue;
this.typedDictionary.TryGetValue(key, out oldValue);
bool removed = this.typedDictionary.Remove(key);
if(removed) {
OnRemoved(new KeyValuePair<KeyType, ValueType>(key, oldValue));
OnRemoved(new KeyValuePair<TKey, TValue>(key, oldValue));
}
return removed;
}
@ -229,16 +239,32 @@ namespace Nuclex.Support.Collections {
/// <summary>Fires the 'ItemAdded' event</summary>
/// <param name="item">Item that has been added to the collection</param>
protected virtual void OnAdded(KeyValuePair<KeyType, ValueType> item) {
protected virtual void OnAdded(KeyValuePair<TKey, TValue> item) {
if(ItemAdded != null)
ItemAdded(this, new ItemEventArgs<KeyValuePair<KeyType, ValueType>>(item));
ItemAdded(this, new ItemEventArgs<KeyValuePair<TKey, TValue>>(item));
#if !NO_SPECIALIZED_COLLECTIONS
if(CollectionChanged != null)
CollectionChanged(
this, new NotifyCollectionChangedEventArgs(
NotifyCollectionChangedAction.Add, item
)
);
#endif
}
/// <summary>Fires the 'ItemRemoved' event</summary>
/// <param name="item">Item that has been removed from the collection</param>
protected virtual void OnRemoved(KeyValuePair<KeyType, ValueType> item) {
protected virtual void OnRemoved(KeyValuePair<TKey, TValue> item) {
if(ItemRemoved != null)
ItemRemoved(this, new ItemEventArgs<KeyValuePair<KeyType, ValueType>>(item));
ItemRemoved(this, new ItemEventArgs<KeyValuePair<TKey, TValue>>(item));
#if !NO_SPECIALIZED_COLLECTIONS
if(CollectionChanged != null)
CollectionChanged(
this, new NotifyCollectionChangedEventArgs(
NotifyCollectionChangedAction.Remove, item
)
);
#endif
}
/// <summary>Fires the 'Clearing' event</summary>
@ -251,6 +277,10 @@ namespace Nuclex.Support.Collections {
protected virtual void OnCleared() {
if(Cleared != null)
Cleared(this, EventArgs.Empty);
#if !NO_SPECIALIZED_COLLECTIONS
if(CollectionChanged != null)
CollectionChanged(this, CollectionResetEventArgs);
#endif
}
#region IEnumerable implementation
@ -270,7 +300,7 @@ namespace Nuclex.Support.Collections {
/// <param name="value">Item that will be added</param>
void IDictionary.Add(object key, object value) {
this.objectDictionary.Add(key, value);
OnAdded(new KeyValuePair<KeyType, ValueType>((KeyType)key, (ValueType)value));
OnAdded(new KeyValuePair<TKey, TValue>((TKey)key, (TValue)value));
}
/// <summary>Determines whether the specified key exists in the Dictionary</summary>
@ -304,11 +334,11 @@ namespace Nuclex.Support.Collections {
/// <summary>Removes an item from the Dictionary</summary>
/// <param name="key">Key of the item that will be removed</param>
void IDictionary.Remove(object key) {
ValueType value;
bool removed = this.typedDictionary.TryGetValue((KeyType)key, out value);
TValue value;
bool removed = this.typedDictionary.TryGetValue((TKey)key, out value);
this.objectDictionary.Remove(key);
if(removed) {
OnRemoved(new KeyValuePair<KeyType, ValueType>((KeyType)key, (ValueType)value));
OnRemoved(new KeyValuePair<TKey, TValue>((TKey)key, (TValue)value));
}
}
@ -319,15 +349,15 @@ namespace Nuclex.Support.Collections {
get { return this.objectDictionary[key]; }
set {
bool removed;
ValueType oldValue;
removed = this.typedDictionary.TryGetValue((KeyType)key, out oldValue);
TValue oldValue;
removed = this.typedDictionary.TryGetValue((TKey)key, out oldValue);
this.objectDictionary[key] = value;
if(removed) {
OnRemoved(new KeyValuePair<KeyType, ValueType>((KeyType)key, oldValue));
OnRemoved(new KeyValuePair<TKey, TValue>((TKey)key, oldValue));
}
OnAdded(new KeyValuePair<KeyType, ValueType>((KeyType)key, (ValueType)value));
OnAdded(new KeyValuePair<TKey, TValue>((TKey)key, (TValue)value));
}
}
@ -337,15 +367,15 @@ namespace Nuclex.Support.Collections {
/// <summary>Inserts an already prepared element into the Dictionary</summary>
/// <param name="item">Prepared element that will be added to the Dictionary</param>
void ICollection<KeyValuePair<KeyType, ValueType>>.Add(
KeyValuePair<KeyType, ValueType> item
void ICollection<KeyValuePair<TKey, TValue>>.Add(
KeyValuePair<TKey, TValue> item
) {
this.typedDictionary.Add(item);
OnAdded(item);
}
/// <summary>Removes all items from the Dictionary</summary>
void ICollection<KeyValuePair<KeyType, ValueType>>.Clear() {
void ICollection<KeyValuePair<TKey, TValue>>.Clear() {
OnClearing();
this.typedDictionary.Clear();
OnCleared();
@ -353,8 +383,8 @@ namespace Nuclex.Support.Collections {
/// <summary>Removes all items from the Dictionary</summary>
/// <param name="itemToRemove">Item that will be removed from the Dictionary</param>
bool ICollection<KeyValuePair<KeyType, ValueType>>.Remove(
KeyValuePair<KeyType, ValueType> itemToRemove
bool ICollection<KeyValuePair<TKey, TValue>>.Remove(
KeyValuePair<TKey, TValue> itemToRemove
) {
bool removed = this.typedDictionary.Remove(itemToRemove);
if(removed) {
@ -412,9 +442,16 @@ namespace Nuclex.Support.Collections {
#endif //!NO_SERIALIZATION
/// <summary>The wrapped Dictionary under its type-safe interface</summary>
private IDictionary<KeyType, ValueType> typedDictionary;
private IDictionary<TKey, TValue> typedDictionary;
/// <summary>The wrapped Dictionary under its object interface</summary>
private IDictionary objectDictionary;
#if !NO_SPECIALIZED_COLLECTIONS
/// <summary>Fixed event args used to notify that the collection has reset</summary>
private static readonly NotifyCollectionChangedEventArgs CollectionResetEventArgs =
new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset);
#endif
}
} // namespace Nuclex.Support.Collections