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Removed overridable change notifications from MultiDictionary - accurately sending these would involve considerable overhead; added unit tests for all main interface methods of the MultiDictionary

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git-svn-id: file:///srv/devel/repo-conversion/nusu@261 d2e56fa2-650e-0410-a79f-9358c0239efd
This commit is contained in:
Markus Ewald 2012-03-02 23:00:02 +00:00
parent b37c4a757c
commit df169e376a
4 changed files with 663 additions and 79 deletions
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489
Documents/CommandLine.txt
View File

@ -1,13 +1,478 @@
 /*
struct CommandLine {
[Option]
bool? Option;
[Option]
int? Width;
[Option]
TypeCode Code;
[Values]
string[] Values;
}
*/
#region CPL License
/*
Nuclex Framework
Copyright (C) 2002-2012 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 {
if(value == null) {
ICollection<TValue> values;
if(this.typedDictionary.TryGetValue(key, out values)) {
foreach(TValue removedValue in values) {
}
}
this.typedDictionary.Remove(key);
}
ICollection<TValue> currentValues;
if(this.typedDictionary.TryGetValue(key, out currentValues)) {
ValueList currentValueList = (ValueList)currentValues;
int index = 0;
foreach(TValue addedValue in value) {
if(index < currentValueList.Count) {
TValue original = currentValueList[index];
currentValueList[index] = addedValue;
OnReplaced(
new KeyValuePair<TKey, TValue>(key, original),
new KeyValuePair<TKey, TValue>(key, addedValue)
);
} else {
currentValueList.Add(addedValue);
OnAdded(new KeyValuePair<TKey, TValue>(key, addedValue));
}
++index;
}
int count = currentValueList.Count;
while(count > index) {
--count;
TValue removedValue = currentValueList[count];
currentValueList.RemoveAt(count);
OnRemoved(new KeyValuePair<TKey, TValue>(key, removedValue));
}
} 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));
++this.count;
}
}
}
}
/// <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 'ItemReplaced' event</summary>
/// <param name="oldItem">Item that was replaced in the collection</param>
/// <param name="newItem">Item that the original was replaced by</param>
protected virtual void OnReplaced(
KeyValuePair<TKey, TValue> oldItem, KeyValuePair<TKey, TValue> newItem
) { }
/// <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

2
Source/Collections/MultiDictionary.Interfaces.cs
View File

@ -119,8 +119,6 @@ namespace Nuclex.Support.Collections {
if(values.Count == 0) {
this.typedDictionary.Remove(itemToRemove.Key);
}
OnRemoved(itemToRemove);
return true;
} else {
return false;

178
Source/Collections/MultiDictionary.Test.cs
View File

@ -206,6 +206,184 @@ namespace Nuclex.Support.Collections {
Assert.IsFalse(dictionary.ContainsKey(20));
}
/// <summary>
/// Verifies that the key collection can be retrieved from the dictionary
/// </summary>
[Test]
public void KeyCollectionCanBeRetrieved() {
var dictionary = new MultiDictionary<int, string>();
dictionary.Add(10, "ten");
dictionary.Add(10, "zehn");
ICollection<int> keys = dictionary.Keys;
Assert.IsNotNull(keys);
Assert.AreEqual(1, keys.Count);
}
/// <summary>
/// Verifies that the key collection can be retrieved from the dictionary
/// </summary>
[Test]
public void ValueCollectionCanBeRetrieved() {
var dictionary = new MultiDictionary<int, string>();
dictionary.Add(10, "ten");
dictionary.Add(10, "zehn");
dictionary.Add(20, "twenty");
ICollection<string> values = dictionary.Values;
Assert.IsNotNull(values);
Assert.AreEqual(3, values.Count);
}
/// <summary>
/// Verifies that TryGetValue() returns false and doesn't throw if a key
/// is not found in the collection
/// </summary>
[Test]
public void TryGetValueReturnsFalseOnMissingKey() {
var dictionary = new MultiDictionary<int, string>();
ICollection<string> values;
Assert.IsFalse(dictionary.TryGetValue(123, out values));
}
/// <summary>Verifies that keys can be looked up via TryGetValue()</summary>
[Test]
public void TryGetValueCanLookUpValues() {
var dictionary = new MultiDictionary<int, string>();
dictionary.Add(10, "ten");
dictionary.Add(10, "zehn");
ICollection<string> values;
Assert.IsTrue(dictionary.TryGetValue(10, out values));
Assert.AreEqual(2, values.Count);
}
/// <summary>
/// Verifies that assigning null to a key deletes all the values stored
/// under it
/// </summary>
[Test]
public void AssigningNullToKeyRemovesAllValues() {
var dictionary = new MultiDictionary<int, string>();
dictionary.Add(10, "ten");
dictionary.Add(10, "zehn");
dictionary.Add(20, "twenty");
Assert.AreEqual(3, dictionary.Count);
dictionary[10] = null;
Assert.AreEqual(1, dictionary.Count);
Assert.IsFalse(dictionary.ContainsKey(10));
}
/// <summary>
/// Verifies that assigning null to a key deletes all the values stored
/// under it
/// </summary>
[Test]
public void ValueListCanBeAssignedToNewKey() {
var dictionary = new MultiDictionary<int, string>();
dictionary[3] = new List<string>() { "three", "drei" };
Assert.AreEqual(2, dictionary.Count);
Assert.IsTrue(dictionary.Contains(new KeyValuePair<int, string>(3, "three")));
}
/// <summary>
/// Verifies that assigning null to a key deletes all the values stored
/// under it
/// </summary>
[Test]
public void ValueListCanOverwriteExistingKey() {
var dictionary = new MultiDictionary<int, string>();
dictionary.Add(10, "dix");
Assert.AreEqual(1, dictionary.Count);
dictionary[10] = new List<string>() { "ten", "zehn" };
Assert.AreEqual(2, dictionary.Count);
Assert.IsFalse(dictionary.Contains(new KeyValuePair<int, string>(10, "dix")));
Assert.IsTrue(dictionary.Contains(new KeyValuePair<int, string>(10, "ten")));
}
/// <summary>
/// Verifies that nothing bad happens when a key is removed from the dictionary
/// that it doesn't contain
/// </summary>
[Test]
public void NonExistingKeyCanBeRemoved() {
var dictionary = new MultiDictionary<int, string>();
Assert.AreEqual(0, dictionary.RemoveKey(123));
}
/// <summary>
/// Verifies that the remove method returns the number of values that have
/// been removed from the dictionary
/// </summary>
[Test]
public void RemoveReturnsNumberOfValuesRemoved() {
var dictionary = new MultiDictionary<int, string>();
dictionary.Add(10, "ten");
dictionary.Add(10, "zehn");
Assert.AreEqual(2, dictionary.RemoveKey(10));
}
/// <summary>
/// Verifies that the dictionary becomes empty after clearing it
/// </summary>
[Test]
public void DictionaryIsEmptyAfterClear() {
var dictionary = new MultiDictionary<int, string>();
dictionary.Add(10, "ten");
dictionary.Add(10, "zehn");
dictionary.Add(20, "twenty");
Assert.AreEqual(3, dictionary.Count);
dictionary.Clear();
Assert.AreEqual(0, dictionary.Count);
}
/// <summary>
/// Verifies that non-existing values can be removed from the dictionary
/// </summary>
[Test]
public void NonExistingValueCanBeRemoved() {
var dictionary = new MultiDictionary<int, string>();
Assert.IsFalse(dictionary.Remove(123, "test"));
}
/// <summary>
/// Verifies that nothing bad happens when the last value under a key is removed
/// </summary>
[Test]
public void LastValueOfKeyCanBeRemoved() {
var dictionary = new MultiDictionary<int, string>();
dictionary.Add(123, "test");
dictionary.Remove(123, "test");
Assert.AreEqual(0, dictionary.CountValues(123));
}
/// <summary>
/// Verifies that the dictionary can be copied into an array
/// </summary>
[Test]
public void DictionaryCanBeCopiedIntoArray() {
var expected = new List<KeyValuePair<int, string>>() {
new KeyValuePair<int, string>(1, "one"),
new KeyValuePair<int, string>(1, "eins"),
new KeyValuePair<int, string>(2, "two"),
new KeyValuePair<int, string>(2, "zwei")
};
var dictionary = new MultiDictionary<int, string>();
foreach(KeyValuePair<int, string> entry in expected) {
dictionary.Add(entry.Key, entry.Value);
}
var actual = new KeyValuePair<int, string>[4];
dictionary.CopyTo(actual, 0);
CollectionAssert.AreEquivalent(expected, actual);
}
}
} // namespace Nuclex.Support.Collections

65
Source/Collections/MultiDictionary.cs
View File

@ -328,43 +328,17 @@ namespace Nuclex.Support.Collections {
get { return this.typedDictionary[key]; }
set {
if(value == null) {
this.typedDictionary.Remove(key);
}
RemoveKey(key);
} else {
ICollection<TValue> currentValues;
if(this.typedDictionary.TryGetValue(key, out currentValues)) {
ValueList currentValueList = (ValueList)currentValues;
int index = 0;
foreach(TValue addedValue in value) {
if(index < currentValueList.Count) {
TValue original = currentValueList[index];
currentValueList[index] = addedValue;
OnReplaced(
new KeyValuePair<TKey, TValue>(key, original),
new KeyValuePair<TKey, TValue>(key, addedValue)
);
} else {
currentValueList.Add(addedValue);
OnAdded(new KeyValuePair<TKey, TValue>(key, addedValue));
}
++index;
}
int count = currentValueList.Count;
while(count > index) {
--count;
TValue removedValue = currentValueList[count];
currentValueList.RemoveAt(count);
OnRemoved(new KeyValuePair<TKey, TValue>(key, removedValue));
}
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));
}
}
}
@ -381,7 +355,6 @@ namespace Nuclex.Support.Collections {
}
values.Add(value);
OnAdded(new KeyValuePair<TKey, TValue>(key, value));
}
/// <summary>
@ -397,12 +370,9 @@ namespace Nuclex.Support.Collections {
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;
@ -418,10 +388,6 @@ namespace Nuclex.Support.Collections {
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;
@ -430,33 +396,10 @@ namespace Nuclex.Support.Collections {
/// <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 'ItemReplaced' event</summary>
/// <param name="oldItem">Item that was replaced in the collection</param>
/// <param name="newItem">Item that the original was replaced by</param>
protected virtual void OnReplaced(
KeyValuePair<TKey, TValue> oldItem, KeyValuePair<TKey, TValue> newItem
) { }
/// <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>