CodeActivityMetadata.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx40 / System.Activities / System / Activities / CodeActivityMetadata.cs / 1305376 / CodeActivityMetadata.cs
                        
                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------

namespace System.Activities 
{
    using System; 
    using System.Runtime; 
    using System.Collections.ObjectModel;
    using System.Activities.Validation; 

    public struct CodeActivityMetadata
    {
        Activity activity; 
        LocationReferenceEnvironment environment;
        bool createEmptyBindings; 
 
        internal CodeActivityMetadata(Activity activity, LocationReferenceEnvironment environment, bool createEmptyBindings)
        { 
            this.activity = activity;
            this.environment = environment;
            this.createEmptyBindings = createEmptyBindings;
        } 

        internal bool CreateEmptyBindings 
        { 
            get
            { 
                return this.createEmptyBindings;
            }
        }
 
        public LocationReferenceEnvironment Environment
        { 
            get 
            {
                return this.environment; 
            }
        }

        internal Activity CurrentActivity 
        {
            get 
            { 
                return this.activity;
            } 
        }

        public bool HasViolations
        { 
            get
            { 
                if (this.activity == null) 
                {
                    return false; 
                }
                else
                {
                    return this.activity.HasTempViolations; 
                }
            } 
        } 

        public static bool operator ==(CodeActivityMetadata left, CodeActivityMetadata right) 
        {
            return left.Equals(right);
        }
 
        public static bool operator !=(CodeActivityMetadata left, CodeActivityMetadata right)
        { 
            return !left.Equals(right); 
        }
 
        public override bool Equals(object obj)
        {
            if (!(obj is CodeActivityMetadata))
            { 
                return false;
            } 
 
            CodeActivityMetadata other = (CodeActivityMetadata)obj;
            return other.activity == this.activity && other.Environment == this.Environment 
                && other.CreateEmptyBindings == this.CreateEmptyBindings;
        }

        public override int GetHashCode() 
        {
            if (this.activity == null) 
            { 
                return 0;
            } 
            else
            {
                return this.activity.GetHashCode();
            } 
        }
 
        public void Bind(Argument binding, RuntimeArgument argument) 
        {
            ThrowIfDisposed(); 

            Argument.TryBind(binding, argument, this.activity);
        }
 
        internal bool TryGetInlinedLocationReference(LocationReference sourceReference, out LocationReference inlinedReference)
        { 
            Fx.Assert(this.activity.SkipArgumentResolution, "We should only be calling this from activities which skip argument resolution."); 

            ThrowIfDisposed(); 

            if (this.Environment.IsVisible(sourceReference))
            {
                CreateArgument(sourceReference); 
                inlinedReference = new InlinedLocationReference(sourceReference, this.activity);
                return true; 
            } 

            inlinedReference = null; 
            return false;
        }

        void CreateArgument(LocationReference sourceReference) 
        {
            RuntimeArgument argument = new RuntimeArgument(NameGenerator.Next(), sourceReference.Type, ArgumentDirection.In); 
            Argument inArgument = ActivityUtilities.CreateArgument(sourceReference.Type, ArgumentDirection.In); 
            inArgument.Expression = ActivityUtilities.CreateLocationReferenceValue(sourceReference);
 
            Bind(inArgument, argument);
            this.activity.AddTempAutoGeneratedArgument(argument);
        }
 
        public void SetValidationErrorsCollection(Collection validationErrors)
        { 
            ThrowIfDisposed(); 

            ActivityUtilities.RemoveNulls(validationErrors); 

            this.activity.SetTempValidationErrorCollection(validationErrors);
        }
 
        public void AddValidationError(string validationErrorMessage)
        { 
            AddValidationError(new ValidationError(validationErrorMessage)); 
        }
 
        public void AddValidationError(ValidationError validationError)
        {
            ThrowIfDisposed();
 
            if (validationError != null)
            { 
                this.activity.AddTempValidationError(validationError); 
            }
        } 

        public void SetArgumentsCollection(Collection arguments)
        {
            ThrowIfDisposed(); 

            ActivityUtilities.RemoveNulls(arguments); 
 
            this.activity.SetArgumentsCollection(arguments, this.createEmptyBindings);
        } 

        public void AddArgument(RuntimeArgument argument)
        {
            ThrowIfDisposed(); 

            if (argument != null) 
            { 
                this.activity.AddArgument(argument, this.createEmptyBindings);
            } 
        }

        public Collection GetArgumentsWithReflection()
        { 
            return Activity.ReflectedInformation.GetArguments(this.activity);
        } 
 
        public void AddDefaultExtensionProvider(Func extensionProvider)
            where T : class 
        {
            if (extensionProvider == null)
            {
                throw FxTrace.Exception.ArgumentNull("extensionProvider"); 
            }
            this.activity.AddDefaultExtensionProvider(extensionProvider); 
        } 

        public void RequireExtension() 
            where T : class
        {
            this.activity.RequireExtension(typeof(T));
        } 

        public void RequireExtension(Type extensionType) 
        { 
            if (extensionType == null)
            { 
                throw FxTrace.Exception.ArgumentNull("extensionType");
            }
            if (extensionType.IsValueType)
            { 
                throw FxTrace.Exception.Argument("extensionType", SR.RequireExtensionOnlyAcceptsReferenceTypes(extensionType.FullName));
            } 
            this.activity.RequireExtension(extensionType); 
        }
 
        void ThrowIfDisposed()
        {
            if (this.activity == null)
            { 
                throw FxTrace.Exception.AsError(new ObjectDisposedException(ToString()));
            } 
        } 

        internal void Dispose() 
        {
            this.activity = null;
        }
    } 
}

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

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