Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Collections / ObjectModel / ReadOnlyCollection.cs / 1 / ReadOnlyCollection.cs
namespace System.Collections.ObjectModel { using System; using System.Collections; using System.Collections.Generic; using System.Diagnostics; [Serializable()] [System.Runtime.InteropServices.ComVisible(false)] [DebuggerTypeProxy(typeof(Mscorlib_CollectionDebugView<>))] [DebuggerDisplay("Count = {Count}")] public class ReadOnlyCollection: IList , IList { IList list; [NonSerialized] private Object _syncRoot; public ReadOnlyCollection(IList list) { if (list == null) { ThrowHelper.ThrowArgumentNullException(ExceptionArgument.list); } this.list = list; } public int Count { get { return list.Count; } } public T this[int index] { get { return list[index]; } } public bool Contains(T value) { return list.Contains(value); } public void CopyTo(T[] array, int index) { list.CopyTo(array, index); } public IEnumerator GetEnumerator() { return list.GetEnumerator(); } public int IndexOf(T value) { return list.IndexOf(value); } protected IList Items { get { return list; } } bool ICollection .IsReadOnly { get { return true; } } T IList .this[int index] { get { return list[index]; } set { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); } } void ICollection .Add(T value) { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); } void ICollection .Clear() { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); } void IList .Insert(int index, T value) { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); } bool ICollection .Remove(T value) { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); return false; } void IList .RemoveAt(int index) { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); } IEnumerator IEnumerable.GetEnumerator() { return ((IEnumerable)list).GetEnumerator(); } bool ICollection.IsSynchronized { get { return false; } } object ICollection.SyncRoot { get { if( _syncRoot == null) { ICollection c = list as ICollection; if( c != null) { _syncRoot = c.SyncRoot; } else { System.Threading.Interlocked.CompareExchange(ref _syncRoot, new Object(), null); } } return _syncRoot; } } void ICollection.CopyTo(Array array, int index) { if (array==null) { ThrowHelper.ThrowArgumentNullException(ExceptionArgument.array); } if (array.Rank != 1) { ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_RankMultiDimNotSupported); } if( array.GetLowerBound(0) != 0 ) { ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_NonZeroLowerBound); } if (index < 0) { ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.arrayIndex, ExceptionResource.ArgumentOutOfRange_NeedNonNegNum); } if (array.Length - index < Count) { ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_ArrayPlusOffTooSmall); } T[] items = array as T[]; if (items != null) { list.CopyTo(items, index); } else { // // Catch the obvious case assignment will fail. // We can found all possible problems by doing the check though. // For example, if the element type of the Array is derived from T, // we can't figure out if we can successfully copy the element beforehand. // Type targetType = array.GetType().GetElementType(); Type sourceType = typeof(T); if(!(targetType.IsAssignableFrom(sourceType) || sourceType.IsAssignableFrom(targetType))) { ThrowHelper.ThrowArgumentException(ExceptionResource.Argument_InvalidArrayType); } // // We can't cast array of value type to object[], so we don't support // widening of primitive types here. // object[] objects = array as object[]; if( objects == null) { ThrowHelper.ThrowArgumentException(ExceptionResource.Argument_InvalidArrayType); } int count = list.Count; try { for (int i = 0; i < count; i++) { objects[index++] = list[i]; } } catch(ArrayTypeMismatchException) { ThrowHelper.ThrowArgumentException(ExceptionResource.Argument_InvalidArrayType); } } } bool IList.IsFixedSize { get { return true; } } bool IList.IsReadOnly { get { return true; } } object IList.this[int index] { get { return list[index]; } set { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); } } int IList.Add(object value) { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); return -1; } void IList.Clear() { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); } private static bool IsCompatibleObject(object value) { if( (value is T) || ( value == null && !typeof(T).IsValueType) ) { return true; } return false; } bool IList.Contains(object value) { if(IsCompatibleObject(value)) { return Contains((T)value); } return false; } int IList.IndexOf(object value) { if(IsCompatibleObject(value)) { return IndexOf((T)value); } return -1; } void IList.Insert(int index, object value) { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); } void IList.Remove(object value) { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); } void IList.RemoveAt(int index) { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); } private static void VerifyValueType(object value) { if( !IsCompatibleObject(value)) { ThrowHelper.ThrowWrongValueTypeArgumentException(value, typeof(T)); } } } }
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- UrlMappingCollection.cs
- ToolStripDropDownItemDesigner.cs
- Helper.cs
- CollectionsUtil.cs
- JoinGraph.cs
- BaseValidator.cs
- ObservableDictionary.cs
- SurrogateSelector.cs
- SelectionProcessor.cs
- DelayDesigner.cs
- httpserverutility.cs
- Variable.cs
- SelectedGridItemChangedEvent.cs
- LiteralControl.cs
- ErrorItem.cs
- DetailsViewRow.cs
- HMACSHA512.cs
- BindStream.cs
- TypeExtensionConverter.cs
- DataSourceCollectionBase.cs
- ExpressionBindingCollection.cs
- BaseTypeViewSchema.cs
- FindCriteria11.cs
- SelectionRange.cs
- AutomationEvent.cs
- PTConverter.cs
- Control.cs
- x509utils.cs
- EncryptedPackageFilter.cs
- ListManagerBindingsCollection.cs
- BamlTreeUpdater.cs
- SiteMapDataSourceView.cs
- EmptyStringExpandableObjectConverter.cs
- XmlConvert.cs
- DeadCharTextComposition.cs
- DeflateEmulationStream.cs
- OutArgumentConverter.cs
- InstanceLockQueryResult.cs
- OpenTypeLayoutCache.cs
- MetadataArtifactLoaderCompositeFile.cs
- StorageAssociationTypeMapping.cs
- XmlHierarchicalDataSourceView.cs
- SymmetricSecurityProtocol.cs
- TcpConnectionPoolSettings.cs
- DesignerProperties.cs
- GatewayDefinition.cs
- FormsAuthenticationUser.cs
- Constraint.cs
- VirtualDirectoryMapping.cs
- ExceptionValidationRule.cs
- DataGridViewBindingCompleteEventArgs.cs
- Collection.cs
- SchemaConstraints.cs
- Baml2006KnownTypes.cs
- ChangeConflicts.cs
- DefaultMergeHelper.cs
- AsyncOperation.cs
- ASCIIEncoding.cs
- OleDbSchemaGuid.cs
- ScriptManager.cs
- SchemaTypeEmitter.cs
- ClientScriptManagerWrapper.cs
- QueryOpcode.cs
- ZoneMembershipCondition.cs
- IPipelineRuntime.cs
- TileBrush.cs
- CombinedGeometry.cs
- SortableBindingList.cs
- RowBinding.cs
- UnitySerializationHolder.cs
- CacheDependency.cs
- DynamicRenderer.cs
- SignatureDescription.cs
- OdbcReferenceCollection.cs
- XmlQueryTypeFactory.cs
- XamlReader.cs
- TTSVoice.cs
- CharacterBuffer.cs
- FocusTracker.cs
- MemberInfoSerializationHolder.cs
- CommentEmitter.cs
- EntityDataSourceWizardForm.cs
- DBConcurrencyException.cs
- GlobalizationAssembly.cs
- CqlParserHelpers.cs
- LineInfo.cs
- Geometry3D.cs
- SafeReadContext.cs
- LoginCancelEventArgs.cs
- XmlDataLoader.cs
- CodeDirectiveCollection.cs
- OleDbTransaction.cs
- ConfigurationPropertyAttribute.cs
- MailWriter.cs
- OdbcRowUpdatingEvent.cs
- NumberFormatInfo.cs
- XmlArrayItemAttribute.cs
- OLEDB_Enum.cs
- StateBag.cs
- XPathArrayIterator.cs