NavigationPropertySingletonExpression.cs source code in C# .NET

                        Code:
                         / Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / ndp / fx / src / DataWeb / Client / System / Data / Services / Client / ALinq / NavigationPropertySingletonExpression.cs / 3 / NavigationPropertySingletonExpression.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//  
//      Respresents a navigation to a singleton property.
//  
// 
// @owner  [....]
//--------------------------------------------------------------------- 
namespace System.Data.Services.Client
{
    using System;
    using System.Linq; 
    using System.Linq.Expressions;
    using System.Collections.Generic; 
    using System.Diagnostics; 

    /// ResourceSet Expression 
    internal class NavigationPropertySingletonExpression : ResourceExpression
    {
        /// source expression
        private readonly Expression source; 

        /// property member name 
        private readonly Expression memberExpression; 

        ///  
        /// Creates a NavigationPropertySingletonExpression expression
        /// 
        /// the return type of the expression
        /// the source expression 
        /// property member name
        /// expand paths for resource set 
        /// custom query options for resourcse set 
        internal NavigationPropertySingletonExpression(Type type, Expression source, Expression memberExpression, List expandPaths, Dictionary customQueryOptions)
            : base((ExpressionType)ResourceExpressionType.ResourceNavigationPropertySingleton, type, expandPaths, customQueryOptions) 
        {
            this.source = source;
            this.memberExpression = memberExpression;
        } 

        ///  
        /// Gets the member expression. 
        /// 
        internal MemberExpression MemberExpression 
        {
            get
            {
                return (MemberExpression)this.memberExpression; 
            }
        } 
 
        /// 
        /// Gets the source expression. 
        /// 
        internal Expression Source
        {
            get 
            {
                return this.source; 
            } 
        }
 
        /// 
        /// The resource type of the singe instance produced by this singleton navigation.
        /// 
        internal override Type ResourceType 
        {
            get { return this.memberExpression.Type; } 
        } 

        ///  
        /// Singleton navigation properties always produce at most 1 result
        /// 
        internal override bool IsSingleton
        { 
            get { return true; }
        } 
 
        /// 
        /// Does Singleton navigation have query options. 
        /// 
        internal override bool HasQueryOptions
        {
            get 
            {
                return this.ExpandPaths.Count > 0 || this.CustomQueryOptions.Count > 0; 
            } 
        }
 
        /// 
        /// Cast changes the type of the ResourceExpression
        /// 
        /// new type 
        /// new NavigationPropertySingletonExpression
        internal override ResourceExpression Cast(Type type) 
        { 
            NavigationPropertySingletonExpression rse = new NavigationPropertySingletonExpression(
                type, 
                this.source,
                this.MemberExpression,
                this.ExpandPaths.ToList(),
                this.CustomQueryOptions.ToDictionary(kvp => kvp.Key, kvp => kvp.Value)); 

            return rse; 
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//  
//      Respresents a navigation to a singleton property.
//  
// 
// @owner  [....]
//--------------------------------------------------------------------- 
namespace System.Data.Services.Client
{
    using System;
    using System.Linq; 
    using System.Linq.Expressions;
    using System.Collections.Generic; 
    using System.Diagnostics; 

    /// ResourceSet Expression 
    internal class NavigationPropertySingletonExpression : ResourceExpression
    {
        /// source expression
        private readonly Expression source; 

        /// property member name 
        private readonly Expression memberExpression; 

        ///  
        /// Creates a NavigationPropertySingletonExpression expression
        /// 
        /// the return type of the expression
        /// the source expression 
        /// property member name
        /// expand paths for resource set 
        /// custom query options for resourcse set 
        internal NavigationPropertySingletonExpression(Type type, Expression source, Expression memberExpression, List expandPaths, Dictionary customQueryOptions)
            : base((ExpressionType)ResourceExpressionType.ResourceNavigationPropertySingleton, type, expandPaths, customQueryOptions) 
        {
            this.source = source;
            this.memberExpression = memberExpression;
        } 

        ///  
        /// Gets the member expression. 
        /// 
        internal MemberExpression MemberExpression 
        {
            get
            {
                return (MemberExpression)this.memberExpression; 
            }
        } 
 
        /// 
        /// Gets the source expression. 
        /// 
        internal Expression Source
        {
            get 
            {
                return this.source; 
            } 
        }
 
        /// 
        /// The resource type of the singe instance produced by this singleton navigation.
        /// 
        internal override Type ResourceType 
        {
            get { return this.memberExpression.Type; } 
        } 

        ///  
        /// Singleton navigation properties always produce at most 1 result
        /// 
        internal override bool IsSingleton
        { 
            get { return true; }
        } 
 
        /// 
        /// Does Singleton navigation have query options. 
        /// 
        internal override bool HasQueryOptions
        {
            get 
            {
                return this.ExpandPaths.Count > 0 || this.CustomQueryOptions.Count > 0; 
            } 
        }
 
        /// 
        /// Cast changes the type of the ResourceExpression
        /// 
        /// new type 
        /// new NavigationPropertySingletonExpression
        internal override ResourceExpression Cast(Type type) 
        { 
            NavigationPropertySingletonExpression rse = new NavigationPropertySingletonExpression(
                type, 
                this.source,
                this.MemberExpression,
                this.ExpandPaths.ToList(),
                this.CustomQueryOptions.ToDictionary(kvp => kvp.Key, kvp => kvp.Value)); 

            return rse; 
        } 
    }
} 

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

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