EventKeyword.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 / ndp / fx / src / Core / System / Diagnostics / Eventing / Reader / EventKeyword.cs / 1305376 / EventKeyword.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
/*============================================================
** 
** Class: EventKeyword 
**
** Purpose: 
** This public class describes the metadata for a specific Keyword
** defined by a Provider. An instance of this class is obtained from
** a ProviderMetadata object.
** 
============================================================*/
 
using System.Collections.Generic; 

namespace System.Diagnostics.Eventing.Reader { 

    /// 
    /// Describes the metadata for a specific Keyword defined by a Provider.
    /// An instance of this class is obtained from a ProviderMetadata object. 
    /// 
    [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)] 
    public sealed class EventKeyword { 
        private long value;
        private string name; 
        private string displayName;
        private bool dataReady;
        ProviderMetadata pmReference;
        object syncObject; 

        //called from EventMetadata 
        internal EventKeyword(long value, ProviderMetadata pmReference) { 
            this.value = value;
            this.pmReference = pmReference; 
            this.syncObject = new object();
        }

        //called from ProviderMetadata 
        internal EventKeyword(string name, long value, string displayName) {
            this.value = value; 
            this.name = name; 
            this.displayName = displayName;
            this.dataReady = true; 
            this.syncObject = new object();
        }

        internal void PrepareData() { 
            if (dataReady == true) return;
 
            lock (syncObject) { 
                if (dataReady == true) return;
 
                IEnumerable result = pmReference.Keywords;

                this.name = null;
                this.displayName = null; 
                this.dataReady = true;
 
                foreach (EventKeyword key in result) { 
                    if (key.Value == this.value) {
                        this.name = key.Name; 
                        this.displayName = key.DisplayName;
                        break;
                    }
                } 
            }
        } 
 
        public string Name {
            get { 
                PrepareData();
                return this.name;
            }
        } 

        public long Value { 
            get { 
                return this.value;
            } 
        }

        public string DisplayName {
            get { 
                PrepareData();
                return this.displayName; 
            } 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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