Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Activities/System/Activities/Statements/Tracking/StateMachineStateQuery.cs

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+//------------------------------------------------------------------------------
+// <copyright file="StateMachineStateQuery.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Activities.Statements.Tracking
+{
+    using System.Activities.Tracking;
+
+    /// <summary>
+    /// When added to the Queries, subscribes to state machine state execution records.
+    /// </summary>
+    public sealed class StateMachineStateQuery : CustomTrackingQuery
+    {
+        /// <summary>
+        /// Constructor of StateMachineTrackingQuery.
+        /// </summary>
+        public StateMachineStateQuery()
+        {
+            base.Name = StateMachineStateRecord.StateMachineStateRecordName;
+        }   
+        
+        /// <summary>
+        /// Gets the name that distinguishes this tracking record.
+        /// </summary>
+        public new string Name 
+        {
+            get
+            {
+                // By adding the 'new' keyword, the Name property appears to be overriden
+                // and become a Get only property
+                return base.Name;
+            }
+        }
+    }
+}   

mcs/class/referencesource/System.Activities/System/Activities/Statements/Tracking/StateMachineStateRecord.cs

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+//------------------------------------------------------------------------------
+// <copyright file="StateMachineStateRecord.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Activities.Statements.Tracking
+{
+    using System;
+    using System.Activities.Statements;
+    using System.Activities.Tracking;
+    using System.ComponentModel;
+    using System.Diagnostics;
+    using System.Runtime;
+    using System.Runtime.Serialization;
+    
+    /// <summary>
+    /// Represents a tracking record that is created when an state machine instance transitions to a state.
+    /// </summary>
+    [Fx.Tag.XamlVisible(false)]
+    [DataContract]
+    public sealed class StateMachineStateRecord : CustomTrackingRecord
+    {
+        internal static readonly string StateMachineStateRecordName = "System.Activities.Statements.StateMachine";
+
+        private const string StateKey = "currentstate";
+        private const string StateMachineKey = "stateMachine";
+
+        /// <summary>
+        /// Initializes a new instance of the StateMachineStateRecord class.
+        /// </summary>
+        public StateMachineStateRecord()
+            : this(StateMachineStateRecordName)
+        {
+        }
+
+        // Disable the user from arbitrary specifying a name for StateMachine specific tracking record.
+        internal StateMachineStateRecord(string name)
+            : base(name)
+        {
+        }
+
+        internal StateMachineStateRecord(string name, TraceLevel level)
+            : base(name, level)
+        {
+        } 
+
+        internal StateMachineStateRecord(Guid instanceId, string name, TraceLevel level)
+            : base(instanceId, name, level)
+        {
+        }
+
+        private StateMachineStateRecord(StateMachineStateRecord record)
+            : base(record)
+        {
+        }
+
+        /// <summary>
+        /// Gets the display name of the State Machine activity that contains the state.
+        /// </summary>
+        public string StateMachineName
+        {
+            get
+            {
+                if (Data.ContainsKey(StateMachineKey))
+                {
+                    return Data[StateMachineKey].ToString();
+                }
+
+                return string.Empty;
+            }
+
+            internal set
+            {
+                Data[StateMachineKey] = value;
+            }
+        }
+
+        /// <summary>
+        /// Gets the display name of executing state when the record is generated.
+        /// </summary>
+        [DataMember]
+        public string StateName
+        {
+            get
+            {
+                if (Data.ContainsKey(StateKey))
+                {
+                    return Data[StateKey].ToString();
+                }
+
+                return string.Empty;
+            }       
+            
+            internal set
+            {
+                Data[StateKey] = value;
+            }
+        }
+
+        /// <summary>
+        /// Creates a copy of the StateMachineTrackingRecord. (Overrides CustomTrackingRecord.Clone().)
+        /// </summary>
+        /// <returns>A copy of the StateMachineTrackingRecord instance.</returns>
+        protected internal override TrackingRecord Clone()
+        {
+            return new StateMachineStateRecord(this);
+        }
+    }
+}