CompoundFileStorageReference.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 / CompoundFileStorageReference.cs / 1305600 / CompoundFileStorageReference.cs

                            //------------------------------------------------------------------------------ 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// Description: 
//   Implementation of the CompoundFileStorageReference class. 
//
// History: 
//  03/31/2003: BruceMac: Created.
//  05/01/2003: BruceMac: Split off from CompoundFileReference class.
//  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.Collections;
using System.Collections.Specialized;
using System.Globalization;
using System.IO; 
using System.Runtime.InteropServices;
using System.Runtime.Serialization; 
using System.Security.Permissions; 
using System.Text;
 
using System.IO.Packaging;

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

namespace MS.Internal.IO.Packaging.CompoundFile 
{ 
    /// 
    /// Logical reference to a container storage 
    /// 
    /// 
    /// Use this class to represent a logical reference to a container storage,
    ///  
    internal class CompoundFileStorageReference : CompoundFileReference, IComparable
    { 
        //----------------------------------------------------- 
        //
        //   Public Properties 
        //
        //-----------------------------------------------------
        /// 
        /// Full path from the container root to this storage 
        /// 
        public override string FullName 
        { 
            get
            { 
                return _fullName;
            }
        }
 
        //------------------------------------------------------
        // 
        //   public methods 
        //
        //----------------------------------------------------- 
        /// 
        /// Make a new Storage Reference
        /// 
        /// whack-delimited name 
        /// pass null or String.Empty to create a reference to the root storage
        public CompoundFileStorageReference(string fullName) 
        { 
            SetFullName(fullName);
        } 

        #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() != GetType())
                return false;
 
            // Note that because of the GetType() checking above, the casting must be valid.
            CompoundFileStorageReference r = (CompoundFileStorageReference)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 
        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)); 

            // Note that because of the GetType() checking above, the casting must be valid. 
            CompoundFileStorageReference r = (CompoundFileStorageReference)o;
            return String.CompareOrdinal(_fullName.ToUpperInvariant(), r._fullName.ToUpperInvariant());
        }
        #endregion 

        //------------------------------------------------------ 
        // 
        //   Private Methods
        // 
        //------------------------------------------------------
        /// 
        /// Assign the fullName
        ///  
        /// name
        /// cache a duplicate copy of the storage name to save having to do this for 
        /// every call to get_Name 
        /// if leading or trailing path delimiter
        private void SetFullName(string fullName) 
        {
            if (fullName == null || fullName.Length == 0)
            {
                _fullName = String.Empty; 
            }
            else 
            { 
                // 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; 
 
                // ensure that the string is a legal whack-path
                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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