QueryResponse.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 / fx / src / DataWeb / Client / System / Data / Services / Client / QueryResponse.cs / 1625574 / QueryResponse.cs
                        

                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//  
// Response to a batched query.
//  
//--------------------------------------------------------------------- 

namespace System.Data.Services.Client 
{
    #region Namespaces.

    using System; 
    using System.Collections;
    using System.Collections.Generic; 
    using System.Reflection; 
    using System.Diagnostics;
 
    #endregion Namespaces.

    /// 
    /// Response to a batched query. 
    /// 
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1010", Justification = "required for this feature")] 
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1710", Justification = "required for this feature")] 
    public class QueryOperationResponse : OperationResponse, System.Collections.IEnumerable
    { 
        #region Private fields.

        /// Original query
        private readonly DataServiceRequest query; 

        /// Enumerable of objects in query 
        private readonly MaterializeAtom results; 

        #endregion Private fields. 

        /// 
        /// constructor
        ///  
        /// HTTP headers
        /// original query 
        /// retrieved objects 
        internal QueryOperationResponse(Dictionary headers, DataServiceRequest query, MaterializeAtom results)
            : base(headers) 
        {
            this.query = query;
            this.results = results;
        } 

        /// The query that executed within the batch. 
        public DataServiceRequest Query 
        {
            get { return this.query; } 
        }

        /// 
        /// The server Result Set Count value from a query, if the query has requested the value 
        /// 
        ///  
        /// The return value can be either a zero or positive value equals to number of entities in the set on the server 
        /// 
        ///  
        /// Is thrown when count was not part of the original request, i.e., if the count tag is not found in the response stream.
        /// 
        public virtual long TotalCount
        { 
            get
            { 
                throw new NotSupportedException(); 
            }
        } 

        /// get a non-null enumerable of the result
        internal MaterializeAtom Results
        { 
            get
            { 
                if (null != this.Error) 
                {
                    throw System.Data.Services.Client.Error.InvalidOperation(Strings.Context_BatchExecuteError, this.Error); 
                }

                return this.results;
            } 
        }
 
        /// Results from a query 
        /// enumerator of objects in query
        public System.Collections.IEnumerator GetEnumerator() 
        {
            return this.Results.GetEnumerator();
        }
 
        /// 
        /// Gets the continuation for the top level data stream associated with this response object 
        ///  
        /// A continuation that points to the next page for the current data stream in the response.
        public DataServiceQueryContinuation GetContinuation() 
        {
            return this.results.GetContinuation(null);
        }
 
        /// 
        /// Gets the continuation for the next page in the collection. 
        ///  
        /// The collection, or null, if the top level link is to be retrieved
        /// A continuation that points to the next page for the collection 
        public DataServiceQueryContinuation GetContinuation(IEnumerable collection)
        {
            return this.results.GetContinuation(collection);
        } 

        ///  
        /// Gets the continuation for the next page in the collection. 
        /// 
        /// Element type for continuation results. 
        /// The collection, or null, if the top level link is to be retrieved
        /// A continuation that points to the next page for the collection
        public DataServiceQueryContinuation GetContinuation(IEnumerable collection)
        { 
            return (DataServiceQueryContinuation)this.results.GetContinuation(collection);
        } 
 
        /// 
        /// Creates a generic instance of the QueryOperationResponse and return it 
        /// 
        /// generic type for the QueryOperationResponse.
        /// constructor parameter1
        /// constructor parameter2 
        /// constructor parameter3
        /// returns a new strongly typed instance of QueryOperationResponse. 
        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining | System.Runtime.CompilerServices.MethodImplOptions.NoOptimization)] 
        internal static QueryOperationResponse GetInstance(Type elementType, Dictionary headers, DataServiceRequest query, MaterializeAtom results)
        { 
            Type genericType = typeof(QueryOperationResponse<>).MakeGenericType(elementType);
#if !ASTORIA_LIGHT
            return (QueryOperationResponse)Activator.CreateInstance(
                genericType, 
                BindingFlags.CreateInstance | BindingFlags.NonPublic | BindingFlags.Instance,
                null, 
                new object[] { headers, query, results }, 
                System.Globalization.CultureInfo.InvariantCulture);
#else 
            System.Reflection.ConstructorInfo[] info = genericType.GetConstructors(BindingFlags.NonPublic | BindingFlags.Instance);
            System.Diagnostics.Debug.Assert(1 == info.Length, "only expected 1 ctor");
            return (QueryOperationResponse)Util.ConstructorInvoke(info[0],new object[] { headers, query, results });
#endif 
        }
    } 
} 

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

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