CompoundFileStreamReference.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Base / MS / Internal / IO / Packaging / CompoundFile / CompoundFileStreamReference.cs / 1305600 / CompoundFileStreamReference.cs

                            //------------------------------------------------------------------------------ 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// Description: 
//   Definition of the CompoundFileStreamReference class. 
//
// History: 
//  03/27/2002: BruceMac: Initial implementation.
//  05/20/2003: RogerCh:  Ported to WCP tree.
//  08/11/2003: LGolding: Fix Bug 864168 (some of BruceMac's bug fixes were lost
//                          in port to WCP tree). 
//
//----------------------------------------------------------------------------- 
 
using System;
using System.IO; 
using System.Text;                          // for StringBuilder

using System.Windows;
using MS.Internal.WindowsBase; 

namespace MS.Internal.IO.Packaging.CompoundFile 
{ 
    /// 
    /// Logical reference to a container stream 
    /// 
    /// 
    /// Use this class to represent a logical reference to a container stream,
    ///  
    internal class CompoundFileStreamReference : CompoundFileReference, IComparable
    { 
        //----------------------------------------------------- 
        //
        //   Public Properties 
        //
        //-----------------------------------------------------
        /// 
        /// Full path from the root to this stream 
        /// 
        public override string FullName 
        { 
            get
            { 
                return _fullName;
            }
        }
 

        //------------------------------------------------------ 
        // 
        //   Public Methods
        // 
        //-----------------------------------------------------
        #region Constructors
        /// 
        /// Use when you know the full path 
        /// 
        /// whack-delimited name including at least the stream name and optionally including preceding storage names 
        public CompoundFileStreamReference(string fullName) 
        {
            SetFullName(fullName); 
        }

        /// 
        /// Full featured constructor 
        /// 
        /// optional string describing the storage name - may be null if stream exists in the root storage 
        /// stream name 
        /// streamName cannot be null or empty
        public CompoundFileStreamReference(string storageName, string streamName) 
        {
            ContainerUtilities.CheckStringAgainstNullAndEmpty( streamName, "streamName" );

            if ((storageName == null) || (storageName.Length == 0)) 
                _fullName = streamName;
            else 
            { 
                // preallocate space for the stream we are building
                StringBuilder sb = new StringBuilder(storageName, storageName.Length + 1 + streamName.Length); 
                sb.Append(ContainerUtilities.PathSeparator);
                sb.Append(streamName);
                _fullName = sb.ToString();
            } 
        }
        #endregion 
 
        #region Operators
        /// Compare for equality 
        /// the CompoundFileReference to compare to
        public override bool Equals(object o)
        {
            if (o == null) 
                return false;   // Standard behavior.
 
            // support subclassing - our subclasses can call us and do any additive work themselves 
            if (o.GetType() != this.GetType())
                return false; 

            CompoundFileStreamReference r = (CompoundFileStreamReference)o;
            return (String.CompareOrdinal(_fullName.ToUpperInvariant(), r._fullName.ToUpperInvariant()) == 0);
        } 

        /// Returns an integer suitable for including this object in a hash table 
        public override int GetHashCode() 
        {
            return _fullName.GetHashCode(); 
        }

        #endregion
 
        #region IComparable
        ///  
        /// Compares two CompoundFileReferences 
        /// 
        /// CompoundFileReference to compare to this one 
        /// Supports the IComparable interface
        /// Less than zero if this instance is less than the given reference, zero if they are equal
        /// and greater than zero if this instance is greater than the given reference.  Not case sensitive.
        int IComparable.CompareTo(object o) 
        {
            if (o == null) 
                return 1;   // Standard behavior. 

            // different type? 
            if (o.GetType() != GetType())
                throw new ArgumentException(
                    SR.Get(SRID.CanNotCompareDiffTypes));
 
            CompoundFileStreamReference r = (CompoundFileStreamReference)o;
            return String.CompareOrdinal(_fullName.ToUpperInvariant(), r._fullName.ToUpperInvariant()); 
        } 
        #endregion
 
        //------------------------------------------------------
        //
        //   Private Methods
        // 
        //------------------------------------------------------
        ///  
        /// Initialize _fullName 
        /// 
        /// this should only be called from constructors as references are immutable 
        /// string to parse
        /// if leading or trailing path delimiter
        private void SetFullName(string fullName)
        { 
            ContainerUtilities.CheckStringAgainstNullAndEmpty(fullName, "fullName");
 
            // fail on leading path separator to match functionality across the board 
            // Although we need to do ToUpperInvariant before we do string comparison, in this case
            //  it is not necessary since PathSeparatorAsString is a path symbol 
            if (fullName.StartsWith(ContainerUtilities.PathSeparatorAsString, StringComparison.Ordinal))
                throw new ArgumentException(
                    SR.Get(SRID.DelimiterLeading), "fullName");
 
            _fullName = fullName;
            string[] strings = ContainerUtilities.ConvertBackSlashPathToStringArrayPath(fullName); 
            if (strings.Length == 0) 
                throw new ArgumentException(
                    SR.Get(SRID.CompoundFilePathNullEmpty), "fullName"); 
        }

        //-----------------------------------------------------
        // 
        //   Private members
        // 
        //------------------------------------------------------ 
        // this can never be null - use String.Empty
        private String _fullName;  // whack-path 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
                        

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