Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Base / MS / Internal / IO / Packaging / CompoundFile / StreamWithDictionary.cs / 1305600 / StreamWithDictionary.cs
//------------------------------------------------------------------------------ // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // Description: // The object for wrapping a data stream and its associated context // information dictionary. // // History: // 07/05/2002: RogerCh: Initial implementation. // 05/20/2003: RogerCh: Ported to WCP tree. // //----------------------------------------------------------------------------- using System; using System.Collections; using System.IO; namespace MS.Internal.IO.Packaging.CompoundFile { internal class StreamWithDictionary : Stream, IDictionary { Stream baseStream; IDictionary baseDictionary; private bool _disposed; // keep track of if we are disposed internal StreamWithDictionary( Stream wrappedStream, IDictionary wrappedDictionary ) { baseStream = wrappedStream; baseDictionary = wrappedDictionary; } /*************************************************************************/ // Stream members public override bool CanRead { get{ return !_disposed && baseStream.CanRead; }} public override bool CanSeek { get { return !_disposed && baseStream.CanSeek; } } public override bool CanWrite { get { return !_disposed && baseStream.CanWrite; } } public override long Length { get { CheckDisposed(); return baseStream.Length; } } public override long Position { get { CheckDisposed(); return baseStream.Position; } set { CheckDisposed(); baseStream.Position = value; } } public override void Flush() { CheckDisposed(); baseStream.Flush(); } public override long Seek( long offset, SeekOrigin origin ) { CheckDisposed(); return baseStream.Seek(offset, origin); } public override void SetLength( long newLength ) { CheckDisposed(); baseStream.SetLength(newLength); } public override int Read( byte[] buffer, int offset, int count ) { CheckDisposed(); return baseStream.Read(buffer, offset, count); } public override void Write( byte[] buffer, int offset, int count ) { CheckDisposed(); baseStream.Write(buffer, offset, count); } //----------------------------------------------------- // // Protected Methods // //----------------------------------------------------- ////// Dispose(bool) /// /// protected override void Dispose(bool disposing) { try { if (disposing && !_disposed) { _disposed = true; baseStream.Close(); } } finally { base.Dispose(disposing); } } /*************************************************************************/ // IDictionary members bool IDictionary.Contains( object key ) { CheckDisposed(); return baseDictionary.Contains(key); } void IDictionary.Add( object key, object val ) { CheckDisposed(); baseDictionary.Add(key, val); } void IDictionary.Clear() { CheckDisposed(); baseDictionary.Clear(); } IDictionaryEnumerator IDictionary.GetEnumerator() { CheckDisposed(); // IDictionary.GetEnumerator vs. IEnumerable.GetEnumerator? return ((IDictionary)baseDictionary).GetEnumerator(); } void IDictionary.Remove( object key ) { CheckDisposed(); baseDictionary.Remove(key); } object IDictionary.this[ object index ] { get { CheckDisposed(); return baseDictionary[index]; } set { CheckDisposed(); baseDictionary[index] = value; } } ICollection IDictionary.Keys { get { CheckDisposed(); return baseDictionary.Keys; } } ICollection IDictionary.Values { get { CheckDisposed(); return baseDictionary.Values; } } bool IDictionary.IsReadOnly { get { CheckDisposed(); return baseDictionary.IsReadOnly; } } bool IDictionary.IsFixedSize { get { CheckDisposed(); return baseDictionary.IsFixedSize; } } /*************************************************************************/ // ICollection methods void ICollection.CopyTo( Array array, int index ) { CheckDisposed(); ((ICollection)baseDictionary).CopyTo(array, index); } int ICollection.Count { get { CheckDisposed(); return ((ICollection)baseDictionary).Count; } } object ICollection.SyncRoot { get { CheckDisposed(); return ((ICollection)baseDictionary).SyncRoot; } } bool ICollection.IsSynchronized { get { CheckDisposed(); return ((ICollection)baseDictionary).IsSynchronized; } } /*************************************************************************/ // IEnumerable method IEnumerator IEnumerable.GetEnumerator() { CheckDisposed(); return ((IEnumerable)baseDictionary).GetEnumerator(); } ////// Disposed - were we disposed? Offer this to DataSpaceManager so it can do smart flushing /// ///internal bool Disposed { get { return _disposed; } } //------------------------------------------------------ // // Private Methods // //----------------------------------------------------- private void CheckDisposed() { if (_disposed) throw new ObjectDisposedException("Stream"); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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