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namespace System.Workflow.Activities
{
using System;
using System.Text;
using System.Reflection;
using System.Collections;
using System.CodeDom;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Design;
using System.Security;
using System.Security.Permissions;
using System.Workflow.ComponentModel;
using System.Workflow.ComponentModel.Design;
using System.Collections.Generic;
using System.Workflow.ComponentModel.Compiler;
using System.Workflow.Activities.Common;
[SRDescription(SR.SetStateActivityDescription)]
[ToolboxItem(typeof(ActivityToolboxItem))]
[Designer(typeof(SetStateDesigner), typeof(IDesigner))]
[ToolboxBitmap(typeof(SetStateActivity), "Resources.SetStateActivity.png")]
[ActivityValidator(typeof(SetStateValidator))]
[SRCategory(SR.Standard)]
[System.Runtime.InteropServices.ComVisible(false)]
[Obsolete("The System.Workflow.* types are deprecated. Instead, please use the new types from System.Activities.*")]
public sealed class SetStateActivity : Activity
{
internal const string TargetStateNamePropertyName = "TargetStateName";
//metadata property
public static readonly DependencyProperty TargetStateNameProperty = DependencyProperty.Register(TargetStateNamePropertyName, typeof(string), typeof(SetStateActivity), new PropertyMetadata("", DependencyPropertyOptions.Metadata, new ValidationOptionAttribute(ValidationOption.Optional)));
#region Constructors
public SetStateActivity()
{
}
public SetStateActivity(string name)
: base(name)
{
}
#endregion
[SRDescription(SR.TargetStateDescription)]
[Editor(typeof(StateDropDownEditor), typeof(UITypeEditor))]
[DefaultValue((string)null)]
public string TargetStateName
{
get
{
return base.GetValue(TargetStateNameProperty) as string;
}
set
{
base.SetValue(TargetStateNameProperty, value);
}
}
protected override ActivityExecutionStatus Execute(ActivityExecutionContext executionContext)
{
if (executionContext == null)
throw new ArgumentNullException("executionContext");
StateActivity parentState = StateMachineHelpers.FindEnclosingState(executionContext.Activity);
StateActivity rootState = StateMachineHelpers.GetRootState(parentState);
StateMachineExecutionState executionState = StateMachineExecutionState.Get(rootState);
executionState.NextStateName = this.TargetStateName;
return ActivityExecutionStatus.Closed;
}
}
[System.Runtime.InteropServices.ComVisible(false)]
internal sealed class SetStateValidator : ActivityValidator
{
public override ValidationErrorCollection Validate(ValidationManager manager, object obj)
{
ValidationErrorCollection validationErrors = new ValidationErrorCollection(base.Validate(manager, obj));
SetStateActivity setState = obj as SetStateActivity;
if (setState == null)
throw new ArgumentException(SR.GetString(SR.Error_UnexpectedArgumentType, typeof(StateActivity).FullName), "obj");
if (!SetStateContainment.Validate(setState, validationErrors))
return validationErrors; // could not find a valid parent
if (String.IsNullOrEmpty(setState.TargetStateName))
{
validationErrors.Add(new ValidationError(
SR.GetString(SR.Error_PropertyNotSet, SetStateActivity.TargetStateNamePropertyName),
ErrorNumbers.Error_PropertyNotSet, false,
SetStateActivity.TargetStateNamePropertyName));
}
else
{
StateActivity enclosingState = StateMachineHelpers.FindEnclosingState(setState);
Debug.Assert(enclosingState != null); // this should be caught by the SetStateContainment.Validate call above
StateActivity rootState = StateMachineHelpers.GetRootState(enclosingState);
StateActivity targetActivity = StateMachineHelpers.FindStateByName(
rootState,
setState.TargetStateName);
StateActivity targetState = targetActivity as StateActivity;
if (targetState == null)
{
validationErrors.Add(new ValidationError(SR.GetError_SetStateMustPointToAState(), ErrorNumbers.Error_SetStateMustPointToAState, false, SetStateActivity.TargetStateNamePropertyName));
}
else
{
if (!StateMachineHelpers.IsLeafState(targetState))
{
validationErrors.Add(new ValidationError(SR.GetError_SetStateMustPointToALeafNodeState(), ErrorNumbers.Error_SetStateMustPointToALeafNodeState, false, SetStateActivity.TargetStateNamePropertyName));
}
}
}
return validationErrors;
}
#region SetStateContainement
private class SetStateContainment
{
private bool validParentFound = true;
private bool validParentStateFound;
private SetStateContainment()
{
}
public static bool Validate(SetStateActivity setState, ValidationErrorCollection validationErrors)
{
SetStateContainment containment = new SetStateContainment();
ValidateContainment(containment, setState);
if (!containment.validParentFound ||
!containment.validParentStateFound)
{
validationErrors.Add(new ValidationError(SR.GetError_SetStateOnlyWorksOnStateMachineWorkflow(), ErrorNumbers.Error_SetStateOnlyWorksOnStateMachineWorkflow));
return false;
}
return true;
}
private static void ValidateContainment(SetStateContainment containment, Activity activity)
{
Debug.Assert(activity != null);
if (activity.Parent == null || activity.Parent == activity)
{
containment.validParentFound = false;
return;
}
if (SetStateValidator.IsValidContainer(activity.Parent))
{
ValidateParentState(containment, activity.Parent);
return;
}
ValidateContainment(containment, activity.Parent);
}
private static void ValidateParentState(SetStateContainment containment, CompositeActivity activity)
{
Debug.Assert(activity != null);
if (activity.Parent == null)
return;
StateActivity state = activity.Parent as StateActivity;
if (state != null)
{
containment.validParentStateFound = true;
return;
}
ValidateParentState(containment, activity.Parent);
}
}
#endregion
#region Helper methods
static internal bool IsValidContainer(CompositeActivity activity)
{
return (activity is EventDrivenActivity || activity is StateInitializationActivity);
}
#endregion
}
}
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