PartManifestEntry.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 / PartManifestEntry.cs / 1305600 / PartManifestEntry.cs
                        

                        
                            //------------------------------------------------------------------------------ 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// Description: 
//  Simple struct for maintaining information of a Part found in an Xml signature manifest 
//
// History: 
//  02/07/2005: BruceMac: Initial Implementation
//  11/30/2005: BruceMac: Security Mitigations
//
//----------------------------------------------------------------------------- 

using System; 
using System.Diagnostics; 
using System.Collections.Generic;
using System.Security.Cryptography; 
using System.Security.Cryptography.Xml;
using System.Xml;
using System.Windows;
using System.IO.Packaging; 
using MS.Internal;
 
namespace MS.Internal.IO.Packaging 
{
    ///  
    /// Represents parsed value for a single Part/Relationship entry in the Manifest
    /// 
    internal struct PartManifestEntry
    { 
        //-----------------------------------------------------
        // 
        //  Internal Properties 
        //
        //----------------------------------------------------- 
        // is this a relationship entry?
        internal bool IsRelationshipEntry { get { return _relationshipSelectors != null; } }

        internal Uri Uri { get { return _uri; } } 
        internal ContentType ContentType { get { return _contentType; } }
        internal String HashAlgorithm { get { return _hashAlgorithm; } } 
        internal String HashValue { get { return _hashValue; } } 
        internal List Transforms { get { return _transforms; } }
        internal List RelationshipSelectors { get { return _relationshipSelectors; } }      // null if Part entry 
        internal Uri OwningPartUri // only valid if IsRelationshipEntry
        {
            get
            { 
                Debug.Assert(_owningPartUri != null, "Logic error: OwningPart is null on a non-Relationship entry");
                return _owningPartUri; 
            } 
        }
 
        //------------------------------------------------------
        //
        //  Internal Methods
        // 
        //-----------------------------------------------------
        ///  
        /// Constructor 
        /// 
        /// part uri of part in question 
        /// type of part
        /// digest method
        /// value of the hash calculation extracted from the signature Xml
        /// ordered transform list - may be null 
        /// may be null but can never be empty
        internal PartManifestEntry(Uri uri, ContentType contentType, String hashAlgorithm, 
            String hashValue, List transforms, List relationshipSelectors) 
        {
            Invariant.Assert(uri != null); 
            Invariant.Assert(contentType != null);
            Invariant.Assert(hashAlgorithm != null);

            _uri = uri; 
            _contentType = contentType;
            _hashAlgorithm = hashAlgorithm; 
            _hashValue = hashValue; 
            _transforms = transforms;
            _relationshipSelectors = relationshipSelectors; 
            _owningPartUri = null;

            if (_relationshipSelectors != null)
            { 
                Invariant.Assert(relationshipSelectors.Count > 0);
#if DEBUG 
                Invariant.Assert(DoAllSelectorsHaveSameOwningPart(relationshipSelectors), "All relationship selectors should have same owningPart for a given part manifest"); 
#endif
                //Get owning Part uri from one of the relationship selectors 
                _owningPartUri = relationshipSelectors[0].SourceUri;
            }
        }
 

#if DEBUG 
 
        private bool DoAllSelectorsHaveSameOwningPart(IEnumerable relationshipSelectors)
        { 
            Uri owningPartUri = null;
            foreach (PackageRelationshipSelector selector in relationshipSelectors)
            {
                if (owningPartUri == null) 
                {
                    owningPartUri = selector.SourceUri; 
                } 
                else
                    if (Uri.Compare(owningPartUri, selector.SourceUri, UriComponents.SerializationInfoString, UriFormat.UriEscaped, StringComparison.Ordinal) != 0 ) 
                        return false;
            }
            return true;
        } 

#endif 
 
        //------------------------------------------------------
        // 
        //  Private Fields
        //
        //------------------------------------------------------
        private Uri _owningPartUri;             // owing part if this is a Relationship Uri 
        private Uri _uri;
        private ContentType _contentType; 
        private String _hashAlgorithm; 
        private String _hashValue;
        private List _transforms; 
        private List _relationshipSelectors;    // null if this is a Part
    }
  }

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

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