StateMachineAction.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WF / Activities / StateMachineAction.cs / 1305376 / StateMachineAction.cs
                        
                        
                            #region Using directives 

using System;
using System.Collections;
using System.Collections.Generic; 
using System.Collections.Specialized;
using System.Reflection; 
using System.Diagnostics; 
using System.Runtime.Remoting.Messaging;
using System.Workflow.ComponentModel; 
using System.Workflow.ComponentModel.Design;
using System.Workflow.Runtime;
using System.Workflow.Runtime.Hosting;
 
#endregion Using directives
 
namespace System.Workflow.Activities 
{
    [Serializable] 
    internal class StateMachineAction
    {
        private string _stateName;
        [NonSerialized] 
        private StateActivity _state;
        [NonSerialized] 
        private StateActivity _currentState; 
        private StateMachineExecutionState _executionState;
        private StateMachineSubscriptionManager _subscriptionManager; 

        internal string StateName
        {
            get 
            {
                return _stateName; 
            } 
        }
 
        protected StateActivity State
        {
            get
            { 
                return _state;
            } 
        } 

        protected StateActivity CurrentState 
        {
            get
            {
                return _currentState; 
            }
        } 
 
        protected StateMachineExecutionState ExecutionState
        { 
            get
            {
                return _executionState;
            } 
        }
 
        protected StateMachineSubscriptionManager SubscriptionManager 
        {
            get 
            {
                return _subscriptionManager;
            }
        } 

        internal StateMachineAction(string stateName) 
        { 
            _stateName = stateName;
        } 

        internal virtual void Execute(ActivityExecutionContext context)
        {
            if (context == null) 
                throw new ArgumentNullException("context");
            Debug.Assert(context.Activity.QualifiedName.Equals(this.StateName)); 
            _state = (StateActivity)context.Activity; 
            _currentState = StateMachineHelpers.GetCurrentState(context);
            StateActivity rootState = StateMachineHelpers.GetRootState(_state); 
            _executionState = StateMachineExecutionState.Get(rootState);
            _subscriptionManager = _executionState.SubscriptionManager;
        }
    } 

    [Serializable] 
    internal class CloseStateAction : StateMachineAction 
    {
 
        internal CloseStateAction(string stateName)
            : base(stateName)
        {
        } 

        internal override void Execute(ActivityExecutionContext context) 
        { 
            base.Execute(context);
            StateActivity.LeavingState(context); 
        }
    }

    [Serializable] 
    internal class ExecuteChildStateAction : StateMachineAction
    { 
        private string _childStateName; 

        internal ExecuteChildStateAction(string stateName, string childStateName) 
            : base(stateName)
        {
            _childStateName = childStateName;
        } 

        internal string ChildStateName 
        { 
            get
            { 
                return _childStateName;
            }
        }
 
        internal override void Execute(ActivityExecutionContext context)
        { 
            base.Execute(context); 
            StateActivity childState = (StateActivity)this.State.Activities[this.ChildStateName];
            Debug.Assert(childState.Enabled); 
            StateActivity.ExecuteState(context, childState);
        }
    }
 
    [Serializable]
    internal class SubscribeAction : StateMachineAction 
    { 
        private string _eventDrivenName;
 
        internal SubscribeAction(string stateName, string eventDrivenName)
            : base(stateName)
        {
            _eventDrivenName = eventDrivenName; 
        }
 
        internal string EventDrivenName 
        {
            get 
            {
                return _eventDrivenName;
            }
        } 

        internal override void Execute(ActivityExecutionContext context) 
        { 
            base.Execute(context);
            EventDrivenActivity eventDriven = (EventDrivenActivity)this.State.Activities[this.EventDrivenName]; 
            Debug.Assert(eventDriven.Enabled);
            this.SubscriptionManager.SubscribeEventDriven(context, eventDriven);
        }
    } 

    [Serializable] 
    internal class UnsubscribeAction : StateMachineAction 
    {
        private string _eventDrivenName; 

        internal UnsubscribeAction(string stateName, string eventDrivenName)
            : base(stateName)
        { 
            _eventDrivenName = eventDrivenName;
        } 
 
        internal string EventDrivenName
        { 
            get
            {
                return _eventDrivenName;
            } 
        }
 
        internal override void Execute(ActivityExecutionContext context) 
        {
            base.Execute(context); 
            EventDrivenActivity eventDriven = (EventDrivenActivity)this.State.Activities[this.EventDrivenName];
            Debug.Assert(eventDriven.Enabled);
            this.SubscriptionManager.UnsubscribeEventDriven(context, eventDriven);
        } 
    }
 
    [Serializable] 
    internal class ExternalEventAction : StateMachineAction
    { 
        private string _eventDrivenName;

        internal ExternalEventAction(string stateName, string eventDrivenName)
            : base(stateName) 
        {
            _eventDrivenName = eventDrivenName; 
        } 

        internal string EventDrivenName 
        {
            get
            {
                return _eventDrivenName; 
            }
        } 
 
        internal override void Execute(ActivityExecutionContext context)
        { 
            base.Execute(context);
            EventDrivenActivity eventDriven = (EventDrivenActivity)this.State.Activities[this.EventDrivenName];
            Debug.Assert(eventDriven.Enabled);
            StateActivity.ExecuteEventDriven(context, eventDriven); 
        }
    } 
 
    [Serializable]
    internal class SetStateAction : StateMachineAction 
    {
        private string _targetStateName;
        internal SetStateAction(string stateName, string targetStateName)
            : base(stateName) 
        {
            _targetStateName = targetStateName; 
        } 

        internal string TargetStateName 
        {
            get
            {
                return _targetStateName; 
            }
        } 
 
        internal override void Execute(ActivityExecutionContext context)
        { 
            base.Execute(context);
            this.ExecutionState.CalculateStateTransition(this.CurrentState, this.TargetStateName);
        }
    } 

    [Serializable] 
    internal class DisableQueuesAction : StateMachineAction 
    {
        internal DisableQueuesAction(string stateName) 
            : base(stateName)
        {
        }
 
        internal override void Execute(ActivityExecutionContext context)
        { 
            base.Execute(context); 

            StateActivity state = this.State; 
            StateActivity rootState = StateMachineHelpers.GetRootState(state);
            Queue states = new Queue();
            states.Enqueue(rootState);
            while (states.Count > 0) 
            {
                state = states.Dequeue(); 
                foreach (Activity activity in state.EnabledActivities) 
                {
                    EventDrivenActivity eventDriven = activity as EventDrivenActivity; 
                    if (eventDriven != null)
                    {
                        IEventActivity eventActivity = StateMachineHelpers.GetEventActivity(eventDriven);
                        IComparable queueName = eventActivity.QueueName; 
                        if (queueName != null)
                        { 
                            WorkflowQueue queue = StateMachineSubscriptionManager.GetWorkflowQueue(context, queueName); 
                            if (queue != null)
                                queue.Enabled = this.SubscriptionManager.Subscriptions.ContainsKey(queueName); 
                        }
                    }
                    else
                    { 
                        StateActivity childState = activity as StateActivity;
                        if (childState != null) 
                            states.Enqueue(childState); 
                    }
                } 
            }
        }
    }
 

    [Serializable] 
    internal class EnteringStateAction : StateMachineAction 
    {
        internal EnteringStateAction(string stateName) 
            : base(stateName)
        {
        }
 
        internal override void Execute(ActivityExecutionContext context)
        { 
            base.Execute(context); 
            context.TrackData(StateActivity.StateChangeTrackingDataKey, this.CurrentState.QualifiedName);
        } 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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StateMachineAction.cs source code in C# .NET

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