Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Collections / ListDictionaryInternal.cs / 1 / ListDictionaryInternal.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================ ** ** Class: ListDictionaryInternal ** ** ** Purpose: List for exceptions. ** ** ===========================================================*/ namespace System.Collections { /// This is a simple implementation of IDictionary using a singly linked list. This /// will be smaller and faster than a Hashtable if the number of elements is 10 or less. /// This should not be used if performance is important for large numbers of elements. [Serializable] internal class ListDictionaryInternal: IDictionary { DictionaryNode head; int version; int count; [NonSerialized] private Object _syncRoot; public ListDictionaryInternal() { } public Object this[Object key] { get { if (key == null) { throw new ArgumentNullException("key", Environment.GetResourceString("ArgumentNull_Key")); } DictionaryNode node = head; while (node != null) { if ( node.key.Equals(key) ) { return node.value; } node = node.next; } return null; } set { if (key == null) { throw new ArgumentNullException("key", Environment.GetResourceString("ArgumentNull_Key")); } if (!key.GetType().IsSerializable) throw new ArgumentException(Environment.GetResourceString("Argument_NotSerializable"), "key"); if( (value != null) && (!value.GetType().IsSerializable ) ) throw new ArgumentException(Environment.GetResourceString("Argument_NotSerializable"), "value"); version++; DictionaryNode last = null; DictionaryNode node; for (node = head; node != null; node = node.next) { if( node.key.Equals(key) ) { break; } last = node; } if (node != null) { // Found it node.value = value; return; } // Not found, so add a new one DictionaryNode newNode = new DictionaryNode(); newNode.key = key; newNode.value = value; if (last != null) { last.next = newNode; } else { head = newNode; } count++; } } public int Count { get { return count; } } public ICollection Keys { get { return new NodeKeyValueCollection(this, true); } } public bool IsReadOnly { get { return false; } } public bool IsFixedSize { get { return false; } } public bool IsSynchronized { get { return false; } } public Object SyncRoot { get { if( _syncRoot == null) { System.Threading.Interlocked.CompareExchange(ref _syncRoot, new Object(), null); } return _syncRoot; } } public ICollection Values { get { return new NodeKeyValueCollection(this, false); } } public void Add(Object key, Object value) { if (key == null) { throw new ArgumentNullException("key", Environment.GetResourceString("ArgumentNull_Key")); } if (!key.GetType().IsSerializable) throw new ArgumentException(Environment.GetResourceString("Argument_NotSerializable"), "key" ); if( (value != null) && (!value.GetType().IsSerializable) ) throw new ArgumentException(Environment.GetResourceString("Argument_NotSerializable"), "value"); version++; DictionaryNode last = null; DictionaryNode node; for (node = head; node != null; node = node.next) { if (node.key.Equals(key)) { throw new ArgumentException(Environment.GetResourceString("Argument_AddingDuplicate__", node.key, key)); } last = node; } if (node != null) { // Found it node.value = value; return; } // Not found, so add a new one DictionaryNode newNode = new DictionaryNode(); newNode.key = key; newNode.value = value; if (last != null) { last.next = newNode; } else { head = newNode; } count++; } public void Clear() { count = 0; head = null; version++; } public bool Contains(Object key) { if (key == null) { throw new ArgumentNullException("key", Environment.GetResourceString("ArgumentNull_Key")); } for (DictionaryNode node = head; node != null; node = node.next) { if (node.key.Equals(key)) { return true; } } return false; } public void CopyTo(Array array, int index) { if (array==null) throw new ArgumentNullException("array"); if (array.Rank != 1) throw new ArgumentException(Environment.GetResourceString("Arg_RankMultiDimNotSupported")); if (index < 0) throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); if ( array.Length - index < this.Count ) throw new ArgumentException( Environment.GetResourceString("ArgumentOutOfRange_Index"), "index"); for (DictionaryNode node = head; node != null; node = node.next) { array.SetValue(new DictionaryEntry(node.key, node.value), index); index++; } } public IDictionaryEnumerator GetEnumerator() { return new NodeEnumerator(this); } IEnumerator IEnumerable.GetEnumerator() { return new NodeEnumerator(this); } public void Remove(Object key) { if (key == null) { throw new ArgumentNullException("key", Environment.GetResourceString("ArgumentNull_Key")); } version++; DictionaryNode last = null; DictionaryNode node; for (node = head; node != null; node = node.next) { if (node.key.Equals(key)) { break; } last = node; } if (node == null) { return; } if (node == head) { head = node.next; } else { last.next = node.next; } count--; } private class NodeEnumerator : IDictionaryEnumerator { ListDictionaryInternal list; DictionaryNode current; int version; bool start; public NodeEnumerator(ListDictionaryInternal list) { this.list = list; version = list.version; start = true; current = null; } public Object Current { get { return Entry; } } public DictionaryEntry Entry { get { if (current == null) { throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumOpCantHappen")); } return new DictionaryEntry(current.key, current.value); } } public Object Key { get { if (current == null) { throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumOpCantHappen")); } return current.key; } } public Object Value { get { if (current == null) { throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumOpCantHappen")); } return current.value; } } public bool MoveNext() { if (version != list.version) { throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumFailedVersion")); } if (start) { current = list.head; start = false; } else { if( current != null ) { current = current.next; } } return (current != null); } public void Reset() { if (version != list.version) { throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumFailedVersion")); } start = true; current = null; } } private class NodeKeyValueCollection : ICollection { ListDictionaryInternal list; bool isKeys; public NodeKeyValueCollection(ListDictionaryInternal list, bool isKeys) { this.list = list; this.isKeys = isKeys; } void ICollection.CopyTo(Array array, int index) { if (array==null) throw new ArgumentNullException("array"); if (array.Rank != 1) throw new ArgumentException(Environment.GetResourceString("Arg_RankMultiDimNotSupported")); if (index < 0) throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); if ( array.Length - index < list.Count ) throw new ArgumentException(Environment.GetResourceString("ArgumentOutOfRange_Index"), "index"); for (DictionaryNode node = list.head; node != null; node = node.next) { array.SetValue(isKeys ? node.key : node.value, index); index++; } } int ICollection.Count { get { int count = 0; for (DictionaryNode node = list.head; node != null; node = node.next) { count++; } return count; } } bool ICollection.IsSynchronized { get { return false; } } Object ICollection.SyncRoot { get { return list.SyncRoot; } } IEnumerator IEnumerable.GetEnumerator() { return new NodeKeyValueEnumerator(list, isKeys); } private class NodeKeyValueEnumerator: IEnumerator { ListDictionaryInternal list; DictionaryNode current; int version; bool isKeys; bool start; public NodeKeyValueEnumerator(ListDictionaryInternal list, bool isKeys) { this.list = list; this.isKeys = isKeys; this.version = list.version; this.start = true; this.current = null; } public Object Current { get { if (current == null) { throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumOpCantHappen")); } return isKeys ? current.key : current.value; } } public bool MoveNext() { if (version != list.version) { throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumFailedVersion")); } if (start) { current = list.head; start = false; } else { if( current != null) { current = current.next; } } return (current != null); } public void Reset() { if (version != list.version) { throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumFailedVersion")); } start = true; current = null; } } } [Serializable] private class DictionaryNode { public Object key; public Object value; public DictionaryNode next; } } }
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- ReaderOutput.cs
- AutoGeneratedField.cs
- GenerateScriptTypeAttribute.cs
- ProbeMatches11.cs
- MonikerBuilder.cs
- HitTestWithPointDrawingContextWalker.cs
- AssemblyBuilder.cs
- StylusButton.cs
- ElementProxy.cs
- NameObjectCollectionBase.cs
- TextServicesContext.cs
- COM2ColorConverter.cs
- KeyValueInternalCollection.cs
- LinqDataSourceUpdateEventArgs.cs
- SchemaSetCompiler.cs
- SmiTypedGetterSetter.cs
- InternalConfigSettingsFactory.cs
- KeyValuePairs.cs
- MenuItem.cs
- StateMachineSubscriptionManager.cs
- ReflectEventDescriptor.cs
- XmlSerializableServices.cs
- HostingEnvironmentSection.cs
- ZoneButton.cs
- SpecialFolderEnumConverter.cs
- GridEntry.cs
- NumberSubstitution.cs
- LinqDataSourceValidationException.cs
- SoapAttributeOverrides.cs
- InvalidPrinterException.cs
- FontFamilyValueSerializer.cs
- XPathNodeList.cs
- SoapRpcMethodAttribute.cs
- Color.cs
- ServiceModelExtensionCollectionElement.cs
- QuotedPrintableStream.cs
- xsdvalidator.cs
- XmlUtil.cs
- AssemblyInfo.cs
- sortedlist.cs
- RenderData.cs
- SignedPkcs7.cs
- PersonalizationDictionary.cs
- PropagatorResult.cs
- DetailsView.cs
- RouteTable.cs
- sqlmetadatafactory.cs
- ChtmlTextWriter.cs
- UncommonField.cs
- TextPattern.cs
- EntityKeyElement.cs
- TcpDuplicateContext.cs
- BadImageFormatException.cs
- ContentDefinition.cs
- SqlBulkCopy.cs
- TextBox.cs
- DescendentsWalkerBase.cs
- ResourceSet.cs
- DesignerActionItem.cs
- WebControlToolBoxItem.cs
- DataGridBoolColumn.cs
- SqlDataSourceTableQuery.cs
- Command.cs
- TemplateBindingExtension.cs
- URIFormatException.cs
- BamlRecords.cs
- SamlAuthorizationDecisionStatement.cs
- SqlCacheDependency.cs
- ErrorWebPart.cs
- StorageInfo.cs
- WebPartEditVerb.cs
- FormViewInsertedEventArgs.cs
- HttpHandlerActionCollection.cs
- SecureUICommand.cs
- UnknownWrapper.cs
- XmlExpressionDumper.cs
- StylusDownEventArgs.cs
- HwndPanningFeedback.cs
- UICuesEvent.cs
- entitydatasourceentitysetnameconverter.cs
- SqlAggregateChecker.cs
- BitmapFrameDecode.cs
- ContainerVisual.cs
- Exception.cs
- Gdiplus.cs
- KeyInterop.cs
- DiagnosticTrace.cs
- HotSpot.cs
- WebResourceAttribute.cs
- SafeNativeMethods.cs
- HMACSHA1.cs
- ActivitiesCollection.cs
- WindowsSolidBrush.cs
- ADMembershipProvider.cs
- IPEndPointCollection.cs
- AsymmetricSignatureFormatter.cs
- JournalNavigationScope.cs
- SqlMethods.cs
- XmlSchemaCollection.cs
- ServiceReference.cs