NewArray.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 / cdf / src / NetFx40 / System.Activities / System / Activities / Expressions / NewArray.cs / 1305376 / NewArray.cs
                        

                        
                            //---------------------------------------------------------------- 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//---------------------------------------------------------------

namespace System.Activities.Expressions 
{
    using System.Activities; 
    using System.Collections.ObjectModel; 
    using System.Reflection;
    using System.Runtime.Collections; 
    using System.Windows.Markup;

    [ContentProperty("Bounds")]
    public sealed class NewArray : CodeActivity 
    {
        Collection bounds; 
        ConstructorInfo constructorInfo; 

        public Collection Bounds 
        {
            get
            {
                if (this.bounds == null) 
                {
                    this.bounds = new ValidatingCollection 
                    { 
                        // disallow null values
                        OnAddValidationCallback = item => 
                        {
                            if (item == null)
                            {
                                throw FxTrace.Exception.ArgumentNull("item"); 
                            }
                        } 
                    }; 
                }
                return this.bounds; 
            }
        }

        protected override void CacheMetadata(CodeActivityMetadata metadata) 
        {
            if (!typeof(TResult).IsArray) 
            { 
                metadata.AddValidationError(SR.NewArrayRequiresArrayTypeAsResultType);
 
                // We shortcut any further processing in this case.
                return;
            }
 
            bool foundError = false;
 
            // Loop through each argument, validate it, and if validation 
            // passed expose it to the metadata
            Type[] types = new Type[this.Bounds.Count]; 
            for (int i = 0; i < this.Bounds.Count; i++)
            {
                Argument argument = this.Bounds[i];
                if (argument == null || argument.IsEmpty) 
                {
                    metadata.AddValidationError(SR.ArgumentRequired("Bounds", typeof(NewArray))); 
                    foundError = true; 
                }
                else 
                {
                    if (!isIntegralType(argument.ArgumentType))
                    {
                        metadata.AddValidationError(SR.NewArrayBoundsRequiresIntegralArguments); 
                        foundError = true;
                    } 
                    else 
                    {
                        RuntimeArgument runtimeArgument = new RuntimeArgument("Argument" + i, this.Bounds[i].ArgumentType, this.bounds[i].Direction, true); 
                        metadata.Bind(this.Bounds[i], runtimeArgument);
                        metadata.AddArgument(runtimeArgument);

                        types[i] = argument.ArgumentType; 
                    }
                } 
            } 

            // If we didn't find any errors in the arguments then 
            // we can look for an appropriate constructor.
            if (!foundError)
            {
                this.constructorInfo = typeof(TResult).GetConstructor(types); 
                if (this.constructorInfo == null)
                { 
                    metadata.AddValidationError(SR.ConstructorInfoNotFound(typeof(TResult).Name)); 
                }
            } 
        }

        protected override TResult Execute(CodeActivityContext context)
        { 
            object[] objects = new object[this.Bounds.Count];
            int i = 0; 
            foreach (Argument argument in this.Bounds) 
            {
                objects[i] = argument.Get(context); 
                i++;
            }
            TResult result = (TResult)this.constructorInfo.Invoke(objects);
            return result; 
        }
 
        bool isIntegralType(Type type) 
        {
            if (type == typeof(sbyte) || type == typeof(byte) || type == typeof(char) || type == typeof(short) || 
                type == typeof(ushort) || type == typeof(int) || type == typeof(uint) || type == typeof(long) || type == typeof(ulong))
            {
                return true;
            } 
            else
            { 
                return false; 
            }
        } 

    }
}

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

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