AtomEntry.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataWeb / Client / System / Data / Services / Client / AtomEntry.cs / 1407647 / AtomEntry.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//  
// Provides a class to represent an ATOM entry as parsed and as it
// goes through the materialization pipeline. 
//  
//---------------------------------------------------------------------
 
namespace System.Data.Services.Client
{
    #region Namespaces.
 
    using System;
    using System.Collections; 
    using System.Collections.Generic; 
    using System.Diagnostics;
    using System.Linq; 
    using System.Reflection;
    using System.Xml;
    using System.Xml.Linq;
    using System.Text; 

    #endregion Namespaces. 
 
    /// 
    /// Use this class to represent an entry in an ATOM payload as it 
    /// goes through the WCF Data Services materialization pipeline.
    /// 
    /// 
    /// Different properties are set on instances of this type at different 
    /// points during its lifetime.
    ///  
    [DebuggerDisplay("AtomEntry {ResolvedObject} @ {Identity}")] 
    internal class AtomEntry
    { 
        #region Private fields.

        /// Entry flags.
        private EntryFlags flags; 

        ///  
        /// Masks used get/set the status of the entry 
        /// 
        [Flags] 
        private enum EntryFlags
        {
            /// Bitmask for ShouldUpdateFromPayload flag.
            ShouldUpdateFromPayload = 0x01, 

            /// Bitmask for CreatedByMaterializer flag. 
            CreatedByMaterializer = 0x02, 

            /// Bitmask for EntityHasBeenResolved flag. 
            EntityHasBeenResolved = 0x04,

            /// Bitmask for MediaLinkEntry flag (value).
            MediaLinkEntryValue = 0x08, 

            /// Bitmask for MediaLinkEntry flag (assigned/non-null state). 
            MediaLinkEntryAssigned = 0x10, 

            /// Bitmask for EntityPropertyMappingsApplied flag. 
            EntityPropertyMappingsApplied = 0x20,

            /// Bitmask for IsNull flag.
            IsNull = 0x40 
        }
 
        #endregion Private fields. 

        #region Public properties. 

        /// MediaLinkEntry. Valid after data values applies.
        public bool? MediaLinkEntry
        { 
            get
            { 
                return this.GetFlagValue(EntryFlags.MediaLinkEntryAssigned) ? (bool?)this.GetFlagValue(EntryFlags.MediaLinkEntryValue) : null; 
            }
 
            set
            {
                Debug.Assert(value.HasValue, "value.HasValue -- callers shouldn't set the value to unknown");
                this.SetFlagValue(EntryFlags.MediaLinkEntryAssigned, true); 
                this.SetFlagValue(EntryFlags.MediaLinkEntryValue, value.Value);
            } 
        } 

        /// URI for media content. null if MediaLinkEntry is false. 
        public Uri MediaContentUri
        {
            get;
            set; 
        }
 
        /// URI for editing media. null if MediaLinkEntry is false. 
        public Uri MediaEditUri
        { 
            get;
            set;
        }
 
        /// Type name, as present in server payload.
        public string TypeName 
        { 
            get;
            set; 
        }

        /// Actual type of the ResolvedObject.
        public ClientType ActualType 
        {
            get; 
            set; 
        }
 
        /// Edit link for the ATOM entry - basically link used to update the entity.
        public Uri EditLink
        {
            get; 
            set;
        } 
 
        /// Self link for the ATOM entry - basically link used to query the entity.
        public Uri QueryLink 
        {
            get;
            set;
        } 

        ///  
        /// Identity link for the ATOM entry. 
        /// This is set by the parser (guaranteed, fails to parser if not available on entry).
        ///  
        public string Identity
        {
            get;
            set; 
        }
 
        ///  
        /// Whether the entry is a null.
        /// This is set by the parser only on inlined entries, as it's invalid ATOM in 
        /// top-level cases.
        /// 
        public bool IsNull
        { 
            get { return this.GetFlagValue(EntryFlags.IsNull); }
            set { this.SetFlagValue(EntryFlags.IsNull, value); } 
        } 

        /// Data names and values. 
        public List DataValues
        {
            get;
            set; 
        }
 
        /// Resolved object. 
        public object ResolvedObject
        { 
            get;
            set;
        }
 
        /// Tag for the entry, set by the parser when an entry callback is invoked.
        public object Tag 
        { 
            get;
            set; 
        }

        /// Text for Etag, possibly null.
        public string ETagText 
        {
            get; 
            set; 
        }
 
        /// Text for ETag corresponding to media resource for this entry.
        public string StreamETagText
        {
            get; 
            set;
        } 
 
        /// Whether values should be updated from payload.
        public bool ShouldUpdateFromPayload 
        {
            get { return this.GetFlagValue(EntryFlags.ShouldUpdateFromPayload); }
            set { this.SetFlagValue(EntryFlags.ShouldUpdateFromPayload, value); }
        } 

        /// Whether the materializer has created the ResolvedObject instance. 
        public bool CreatedByMaterializer 
        {
            get { return this.GetFlagValue(EntryFlags.CreatedByMaterializer); } 
            set { this.SetFlagValue(EntryFlags.CreatedByMaterializer, value); }
        }

        /// Whether the entity has been resolved / created. 
        public bool EntityHasBeenResolved
        { 
            get { return this.GetFlagValue(EntryFlags.EntityHasBeenResolved); } 
            set { this.SetFlagValue(EntryFlags.EntityHasBeenResolved, value); }
        } 

        /// Whether entity Property Mappings (a.k.a. friendly feeds) have been applied to this entry if applicable.
        public bool EntityPropertyMappingsApplied
        { 
            get { return this.GetFlagValue(EntryFlags.EntityPropertyMappingsApplied); }
            set { this.SetFlagValue(EntryFlags.EntityPropertyMappingsApplied, value); } 
        } 

        #endregion Public properties. 

        #region Private methods.

        /// Gets the value for a masked item. 
        /// Mask value.
        /// true if the flag is set; false otherwise. 
        private bool GetFlagValue(EntryFlags mask) 
        {
            return (this.flags & mask) != 0; 
        }

        /// Sets the value for a masked item.
        /// Mask value. 
        /// Value to set
        private void SetFlagValue(EntryFlags mask, bool value) 
        { 
            if (value)
            { 
                this.flags |= mask;
            }
            else
            { 
                this.flags &= (~mask);
            } 
        } 

        #endregion Private methods. 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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AtomEntry.cs source code in C# .NET

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