Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / ndp / fx / src / DataEntity / System / Data / Common / Utils / Set.cs / 3 / Set.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections; using System.Collections.Generic; using System.Text; using System.Diagnostics; using System.Linq; namespace System.Data.Common.Utils { // An interface for a set abstraction internal class Set: InternalBase, IEnumerable { #region Fields /// /// Instance of set value comparer. /// internal static readonly IEqualityComparer> ValueComparer = new SetValueComparer(); /// /// Instance of empty set with default comparer. /// internal static readonly SetEmpty = new Set ().MakeReadOnly(); private readonly HashSet _values; private bool _isReadOnly; #endregion #region Constructors /// /// Initialize set with the same values and comparer as other set. /// internal Set(Setother) : this(other._values, other.Comparer) { } /// /// Initialize empty set with default comparer. /// internal Set() : this(null, null) { } ////// Initialize a set with the given elements and using default comparer. /// internal Set(IEnumerableelements) : this(elements, null) { } /// /// Initializes an empty set with the given comparer. /// internal Set(IEqualityComparercomparer) : this(null, comparer) { } /// /// Initialize a set with the given elements and comparer. /// internal Set(IEnumerableelements, IEqualityComparer comparer) { _values = new HashSet ( elements ?? Enumerable.Empty (), comparer ?? EqualityComparer .Default); } #endregion #region Properties /// /// Gets the number of elements in this set. /// internal int Count { get { return _values.Count; } } ////// Gets the comparer used to determine equality and hash codes for elements of the set. /// internal IEqualityComparerComparer { get { return _values.Comparer; } } #endregion #region Methods /// /// Determines whether the given element exists in the set. /// internal bool Contains(TElement element) { return _values.Contains(element); } ////// Requires: !IsReadOnly /// Adds given element to the set. If the set already contains /// the element, does nothing. /// internal void Add(TElement element) { AssertReadWrite(); _values.Add(element); } ////// Requires: !IsReadOnly /// Adds given elements to the set. If the set already contains /// one of the elements, does nothing. /// internal void AddRange(IEnumerableelements) { AssertReadWrite(); foreach (TElement element in elements) { Add(element); } } /// /// Requires: !IsReadOnly /// Removes given element from the set. If the set does not contain /// the element, does nothing. /// internal void Remove(TElement element) { AssertReadWrite(); _values.Remove(element); } ////// Requires: !IsReadOnly /// Removes all elements from the set. /// internal void Clear() { AssertReadWrite(); _values.Clear(); } ////// Returns an array containing all elements of the set. Order is arbitrary. /// internal TElement[] ToArray() { return _values.ToArray(); } ////// Requires: other set must not be null and must have the same comparer. /// Returns true if this set contains the same elements as the other set. /// internal bool SetEquals(Setother) { AssertSetCompatible(other); return _values.Count == other._values.Count && _values.IsSubsetOf(other._values); } /// /// Requires: other set must not be null and must have the same comparer. /// Returns true if all elements in this set are contained in the other set. /// internal bool IsSubsetOf(Setother) { AssertSetCompatible(other); return _values.IsSubsetOf(other._values); } /// /// Requires: other set must not be null and must have the same comparer. /// Returns true if this set and other set have some elements in common. /// internal bool Overlaps(Setother) { AssertSetCompatible(other); return _values.Overlaps(other._values); } /// /// Requires: !IsReadOnly /// Requires: other collection must not be null. /// Subtracts other set from this set, leaving the result in this. /// internal void Subtract(IEnumerableother) { AssertReadWrite(); _values.ExceptWith(other); } /// /// Requires: other collection must not be null. /// Subtracts other set from this set, returning result. /// internal SetDifference(IEnumerable other) { Set copy = new Set (this); copy.Subtract(other); return copy; } /// /// Requires: !IsReadOnly /// Requires: other collection must not be null. /// Unions other set with this set, leaving the result in this set. /// internal void Unite(IEnumerableother) { AssertReadWrite(); _values.UnionWith(other); } /// /// Requires: other collection must not be null. /// Unions other set with this set, returning the result. /// internal SetUnion(IEnumerable other) { Set copy = new Set (this); copy.Unite(other); return copy; } /// /// Requires: !IsReadOnly /// Requires: other set must not be null and must have the same comparer. /// Intersects this set and other set, leaving the result in this set. /// internal void Intersect(Setother) { AssertReadWrite(); AssertSetCompatible(other); _values.IntersectWith(other._values); } /// /// Returns a readonly version of this set. /// internal SetAsReadOnly() { if (_isReadOnly) { // once it's readonly, it's always readonly return this; } Set copy = new Set (this); copy._isReadOnly = true; return copy; } /// /// Makes this set readonly and returns this set. /// internal SetMakeReadOnly() { _isReadOnly = true; return this; } /// /// Returns aggregate hash code of all elements in this set. /// internal int GetElementsHashCode() { int hashCode = 0; foreach (TElement element in this) { hashCode ^= Comparer.GetHashCode(element); } return hashCode; } ////// Returns typed enumerator over elements of the set. /// Uses HashSet<TElement>.Enumerator to avoid boxing struct. /// public HashSet.Enumerator GetEnumerator() { return _values.GetEnumerator(); } [Conditional("DEBUG")] private void AssertReadWrite() { Debug.Assert(!_isReadOnly, "attempting to modify readonly collection"); } [Conditional("DEBUG")] private void AssertSetCompatible(Set other) { Debug.Assert(other != null, "other set null"); Debug.Assert(other.Comparer.GetType().Equals(this.Comparer.GetType())); } #endregion #region IEnumerable Members public struct Enumerator : IEnumerator { private Dictionary .KeyCollection.Enumerator keys; internal Enumerator(Dictionary .KeyCollection.Enumerator keys) { this.keys = keys; } public TElement Current { get { return keys.Current; } } public void Dispose() { keys.Dispose(); } object IEnumerator.Current { get { return ((IEnumerator)keys).Current; } } public bool MoveNext() { return keys.MoveNext(); } void System.Collections.IEnumerator.Reset() { ((System.Collections.IEnumerator)keys).Reset(); } } IEnumerator IEnumerable .GetEnumerator() { return this.GetEnumerator(); } #endregion #region IEnumerable Members /// /// Returns an untyped enumeration of elements in the set. /// ///Enumeration of set members. IEnumerator IEnumerable.GetEnumerator() { return this.GetEnumerator(); } #endregion #region InternalBase internal override void ToCompactString(StringBuilder builder) { StringUtil.ToCommaSeparatedStringSorted(builder, this); } #endregion #region Nested types private class SetValueComparer : IEqualityComparer> { bool IEqualityComparer >.Equals(Set x, Set y) { Debug.Assert(null != x && null != y, "comparer must be used only in context of Dictionary/HashSet"); return x.SetEquals(y); } int IEqualityComparer >.GetHashCode(Set obj) { Debug.Assert(null != obj, "comparer must be used only in context of Dictionary/HashSet"); return obj.GetElementsHashCode(); } } #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------- // // Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections; using System.Collections.Generic; using System.Text; using System.Diagnostics; using System.Linq; namespace System.Data.Common.Utils { // An interface for a set abstraction internal class Set: InternalBase, IEnumerable { #region Fields /// /// Instance of set value comparer. /// internal static readonly IEqualityComparer> ValueComparer = new SetValueComparer(); /// /// Instance of empty set with default comparer. /// internal static readonly SetEmpty = new Set ().MakeReadOnly(); private readonly HashSet _values; private bool _isReadOnly; #endregion #region Constructors /// /// Initialize set with the same values and comparer as other set. /// internal Set(Setother) : this(other._values, other.Comparer) { } /// /// Initialize empty set with default comparer. /// internal Set() : this(null, null) { } ////// Initialize a set with the given elements and using default comparer. /// internal Set(IEnumerableelements) : this(elements, null) { } /// /// Initializes an empty set with the given comparer. /// internal Set(IEqualityComparercomparer) : this(null, comparer) { } /// /// Initialize a set with the given elements and comparer. /// internal Set(IEnumerableelements, IEqualityComparer comparer) { _values = new HashSet ( elements ?? Enumerable.Empty (), comparer ?? EqualityComparer .Default); } #endregion #region Properties /// /// Gets the number of elements in this set. /// internal int Count { get { return _values.Count; } } ////// Gets the comparer used to determine equality and hash codes for elements of the set. /// internal IEqualityComparerComparer { get { return _values.Comparer; } } #endregion #region Methods /// /// Determines whether the given element exists in the set. /// internal bool Contains(TElement element) { return _values.Contains(element); } ////// Requires: !IsReadOnly /// Adds given element to the set. If the set already contains /// the element, does nothing. /// internal void Add(TElement element) { AssertReadWrite(); _values.Add(element); } ////// Requires: !IsReadOnly /// Adds given elements to the set. If the set already contains /// one of the elements, does nothing. /// internal void AddRange(IEnumerableelements) { AssertReadWrite(); foreach (TElement element in elements) { Add(element); } } /// /// Requires: !IsReadOnly /// Removes given element from the set. If the set does not contain /// the element, does nothing. /// internal void Remove(TElement element) { AssertReadWrite(); _values.Remove(element); } ////// Requires: !IsReadOnly /// Removes all elements from the set. /// internal void Clear() { AssertReadWrite(); _values.Clear(); } ////// Returns an array containing all elements of the set. Order is arbitrary. /// internal TElement[] ToArray() { return _values.ToArray(); } ////// Requires: other set must not be null and must have the same comparer. /// Returns true if this set contains the same elements as the other set. /// internal bool SetEquals(Setother) { AssertSetCompatible(other); return _values.Count == other._values.Count && _values.IsSubsetOf(other._values); } /// /// Requires: other set must not be null and must have the same comparer. /// Returns true if all elements in this set are contained in the other set. /// internal bool IsSubsetOf(Setother) { AssertSetCompatible(other); return _values.IsSubsetOf(other._values); } /// /// Requires: other set must not be null and must have the same comparer. /// Returns true if this set and other set have some elements in common. /// internal bool Overlaps(Setother) { AssertSetCompatible(other); return _values.Overlaps(other._values); } /// /// Requires: !IsReadOnly /// Requires: other collection must not be null. /// Subtracts other set from this set, leaving the result in this. /// internal void Subtract(IEnumerableother) { AssertReadWrite(); _values.ExceptWith(other); } /// /// Requires: other collection must not be null. /// Subtracts other set from this set, returning result. /// internal SetDifference(IEnumerable other) { Set copy = new Set (this); copy.Subtract(other); return copy; } /// /// Requires: !IsReadOnly /// Requires: other collection must not be null. /// Unions other set with this set, leaving the result in this set. /// internal void Unite(IEnumerableother) { AssertReadWrite(); _values.UnionWith(other); } /// /// Requires: other collection must not be null. /// Unions other set with this set, returning the result. /// internal SetUnion(IEnumerable other) { Set copy = new Set (this); copy.Unite(other); return copy; } /// /// Requires: !IsReadOnly /// Requires: other set must not be null and must have the same comparer. /// Intersects this set and other set, leaving the result in this set. /// internal void Intersect(Setother) { AssertReadWrite(); AssertSetCompatible(other); _values.IntersectWith(other._values); } /// /// Returns a readonly version of this set. /// internal SetAsReadOnly() { if (_isReadOnly) { // once it's readonly, it's always readonly return this; } Set copy = new Set (this); copy._isReadOnly = true; return copy; } /// /// Makes this set readonly and returns this set. /// internal SetMakeReadOnly() { _isReadOnly = true; return this; } /// /// Returns aggregate hash code of all elements in this set. /// internal int GetElementsHashCode() { int hashCode = 0; foreach (TElement element in this) { hashCode ^= Comparer.GetHashCode(element); } return hashCode; } ////// Returns typed enumerator over elements of the set. /// Uses HashSet<TElement>.Enumerator to avoid boxing struct. /// public HashSet.Enumerator GetEnumerator() { return _values.GetEnumerator(); } [Conditional("DEBUG")] private void AssertReadWrite() { Debug.Assert(!_isReadOnly, "attempting to modify readonly collection"); } [Conditional("DEBUG")] private void AssertSetCompatible(Set other) { Debug.Assert(other != null, "other set null"); Debug.Assert(other.Comparer.GetType().Equals(this.Comparer.GetType())); } #endregion #region IEnumerable Members public struct Enumerator : IEnumerator { private Dictionary .KeyCollection.Enumerator keys; internal Enumerator(Dictionary .KeyCollection.Enumerator keys) { this.keys = keys; } public TElement Current { get { return keys.Current; } } public void Dispose() { keys.Dispose(); } object IEnumerator.Current { get { return ((IEnumerator)keys).Current; } } public bool MoveNext() { return keys.MoveNext(); } void System.Collections.IEnumerator.Reset() { ((System.Collections.IEnumerator)keys).Reset(); } } IEnumerator IEnumerable .GetEnumerator() { return this.GetEnumerator(); } #endregion #region IEnumerable Members /// /// Returns an untyped enumeration of elements in the set. /// ///Enumeration of set members. IEnumerator IEnumerable.GetEnumerator() { return this.GetEnumerator(); } #endregion #region InternalBase internal override void ToCompactString(StringBuilder builder) { StringUtil.ToCommaSeparatedStringSorted(builder, this); } #endregion #region Nested types private class SetValueComparer : IEqualityComparer> { bool IEqualityComparer >.Equals(Set x, Set y) { Debug.Assert(null != x && null != y, "comparer must be used only in context of Dictionary/HashSet"); return x.SetEquals(y); } int IEqualityComparer >.GetHashCode(Set obj) { Debug.Assert(null != obj, "comparer must be used only in context of Dictionary/HashSet"); return obj.GetElementsHashCode(); } } #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- PrintEvent.cs
- BitmapEffectDrawing.cs
- AppSettingsReader.cs
- Int32EqualityComparer.cs
- FieldMetadata.cs
- OleDbDataAdapter.cs
- TypeKeyValue.cs
- DebugView.cs
- SiteMapSection.cs
- CaretElement.cs
- ToolStripComboBox.cs
- TimeoutValidationAttribute.cs
- SlipBehavior.cs
- TextEffectCollection.cs
- ObjectIDGenerator.cs
- DataServiceExpressionVisitor.cs
- XmlQuerySequence.cs
- VisualBasic.cs
- DataGridViewRowConverter.cs
- PolicyManager.cs
- TcpStreams.cs
- GlobalizationSection.cs
- CardSpacePolicyElement.cs
- NativeMethods.cs
- SafeTimerHandle.cs
- TabItem.cs
- MobileUITypeEditor.cs
- DLinqColumnProvider.cs
- EntityDataSourceChangedEventArgs.cs
- EntityDataSourceViewSchema.cs
- DropDownList.cs
- RectKeyFrameCollection.cs
- Enum.cs
- ProxyFragment.cs
- Options.cs
- LocatorPart.cs
- HijriCalendar.cs
- _AutoWebProxyScriptHelper.cs
- TypeConverter.cs
- FixedPage.cs
- ExtenderProvidedPropertyAttribute.cs
- MtomMessageEncodingElement.cs
- Decorator.cs
- CodeDirectoryCompiler.cs
- TypeHelper.cs
- FontNamesConverter.cs
- OleAutBinder.cs
- PropertyMetadata.cs
- UserNameSecurityTokenProvider.cs
- BindingNavigator.cs
- ComplexObject.cs
- XmlBufferReader.cs
- ToolStripSeparatorRenderEventArgs.cs
- NativeMethods.cs
- ProfileBuildProvider.cs
- SchemaImporter.cs
- InputReport.cs
- FixedSOMTableCell.cs
- UInt16.cs
- DataKey.cs
- CleanUpVirtualizedItemEventArgs.cs
- SystemTcpStatistics.cs
- DockPattern.cs
- ChannelManager.cs
- ControlAdapter.cs
- ResXBuildProvider.cs
- DataBoundControlAdapter.cs
- MsmqBindingFilter.cs
- PriorityBinding.cs
- SHA1CryptoServiceProvider.cs
- PrefixHandle.cs
- KeyTime.cs
- SrgsDocument.cs
- HttpPostedFile.cs
- HtmlTable.cs
- Rule.cs
- CompilationLock.cs
- SerializationFieldInfo.cs
- XPathSingletonIterator.cs
- ConfigurationValues.cs
- ProjectionNode.cs
- AssemblyBuilder.cs
- TypedTableBaseExtensions.cs
- _NativeSSPI.cs
- ApplicationProxyInternal.cs
- SafeRightsManagementSessionHandle.cs
- ToolStripItemTextRenderEventArgs.cs
- StorageRoot.cs
- NameTable.cs
- MaterialGroup.cs
- DBSqlParserTableCollection.cs
- CultureInfo.cs
- GlyphInfoList.cs
- RectangleHotSpot.cs
- KerberosRequestorSecurityToken.cs
- HttpModulesSection.cs
- TrackingMemoryStream.cs
- XamlSerializerUtil.cs
- BaseDataBoundControl.cs
- DataServiceException.cs