/// <summary>
/// Initializes a new <see cref="QueryComponents"/> instance that can
/// be used for this continuation.
/// </summary>
/// <returns>A new initializes <see cref="QueryComponents"/>.</returns>
internal QueryComponents CreateQueryComponents()
{
// DSV needs to be 2.0 since $skiptoken will be on the uri.
QueryComponents result = new QueryComponents(this.NextLinkUri, Util.DataServiceVersionEmpty, this.Plan.LastSegmentType, null, null);
return(result);
}
#pragma warning restore 649
#endif
#endregion Private fields.
/// <summary>
/// constructor
/// </summary>
/// <param name="context">originating context</param>
/// <param name="reader">reader</param>
/// <param name="queryComponents">Query components (projection, expected type)</param>
/// <param name="plan">Projection plan (if compiled in an earlier query).</param>
/// <param name="mergeOption">merge option to use for this materialization pass</param>
internal MaterializeAtom(DataServiceContext context, XmlReader reader, QueryComponents queryComponents, ProjectionPlan plan, MergeOption mergeOption)
{
Debug.Assert(queryComponents != null, "queryComponents != null");
this.context = context;
this.elementType = queryComponents.LastSegmentType;
this.MergeOptionValue = mergeOption;
this.ignoreMissingProperties = context.IgnoreMissingProperties;
this.reader = (reader == null) ? null : new System.Data.Services.Client.Xml.XmlAtomErrorReader(reader);
this.countValue = CountStateInitial;
this.expectingSingleValue = ClientConvert.IsKnownNullableType(elementType);
Debug.Assert(reader != null, "Materializer reader is null! Did you mean to use Materializer.ResultsWrapper/EmptyResults?");
// NOTE: dataNamespace is used for reference equality, and while it looks like
// a variable, it appears that it will only get set to XmlConstants.DataWebNamespace
// at runtime. Therefore we remove string dataNamespace as a field here.
// this.dataNamespace = reader != null ? reader.Settings.NameTable.Add(context.DataNamespace) : null;
reader.Settings.NameTable.Add(context.DataNamespace);
string typeScheme = this.context.TypeScheme.OriginalString;
this.parser = new AtomParser(this.reader, AtomParser.XElementBuilderCallback, typeScheme, context.DataNamespace);
AtomMaterializerLog log = new AtomMaterializerLog(this.context, mergeOption);
Type implementationType;
Type materializerType = GetTypeForMaterializer(this.expectingSingleValue, this.elementType, out implementationType);
this.materializer = new AtomMaterializer(parser, context, materializerType, this.ignoreMissingProperties, mergeOption, log, this.MaterializedObjectCallback, queryComponents, plan);
}
#pragma warning restore 649
#endif
#endregion Private fields.
internal MaterializeAtom(DataServiceContext context, XmlReader reader, QueryComponents queryComponents, ProjectionPlan plan, MergeOption mergeOption)
{
Debug.Assert(queryComponents != null, "queryComponents != null");
this.context = context;
this.elementType = queryComponents.LastSegmentType;
this.MergeOptionValue = mergeOption;
this.ignoreMissingProperties = context.IgnoreMissingProperties;
this.reader = (reader == null) ? null : new System.Data.Services.Client.Xml.XmlAtomErrorReader(reader);
this.countValue = CountStateInitial;
this.expectingSingleValue = ClientConvert.IsKnownNullableType(elementType);
Debug.Assert(reader != null, "Materializer reader is null! Did you mean to use Materializer.ResultsWrapper/EmptyResults?");
reader.Settings.NameTable.Add(context.DataNamespace);
string typeScheme = this.context.TypeScheme.OriginalString;
this.parser = new AtomParser(this.reader, AtomParser.XElementBuilderCallback, typeScheme, context.DataNamespace);
AtomMaterializerLog log = new AtomMaterializerLog(this.context, mergeOption);
Type implementationType;
Type materializerType = GetTypeForMaterializer(this.expectingSingleValue, this.elementType, out implementationType);
this.materializer = new AtomMaterializer(parser, context, materializerType, this.ignoreMissingProperties, mergeOption, log, this.MaterializedObjectCallback, queryComponents, plan);
}
/// <summary>Create a request for a specific Uri</summary>
/// <param name="requestUri">The URI for the request.</param>
public DataServiceRequest(Uri requestUri)
{
Util.CheckArgumentNull(requestUri, "requestUri");
Type elementType = typeof(TElement);
elementType = ClientConvert.IsKnownType(elementType) ? elementType : TypeSystem.GetElementType(elementType);
this.queryComponents = new QueryComponents(requestUri, Util.DataServiceVersionEmpty, elementType, null, null);
}
/// <summary>
/// gets the query components for the query after translating
/// </summary>
/// <returns>QueryComponents for query</returns>
private QueryComponents Translate()
{
if (this.queryComponents == null)
{
this.queryComponents = this.queryProvider.Translate(this.queryExpression);
}
return(this.queryComponents);
}
/// <summary>Create a request for a specific Uri</summary>
/// <param name="requestUri">The URI for the request.</param>
/// <param name="queryComponents">The query components for the request</param>
/// <param name="plan">Projection plan to reuse (possibly null).</param>
internal DataServiceRequest(Uri requestUri, QueryComponents queryComponents, ProjectionPlan plan)
: this(requestUri)
{
Debug.Assert(requestUri != null, "requestUri != null");
Debug.Assert(queryComponents != null, "queryComponents != null");
this.queryComponents = queryComponents;
this.plan = plan;
}
internal MaterializeAtom(ResponseInfo responseInfo, QueryComponents queryComponents, ProjectionPlan plan, IODataResponseMessage responseMessage, ODataPayloadKind payloadKind)
{
Type type;
this.responseInfo = responseInfo;
this.elementType = queryComponents.LastSegmentType;
this.MergeOptionValue = responseInfo.MergeOption;
this.expectingPrimitiveValue = PrimitiveType.IsKnownNullableType(this.elementType);
Type materializerType = GetTypeForMaterializer(this.expectingPrimitiveValue, this.elementType, responseInfo.MaxProtocolVersion, out type);
this.materializer = ODataMaterializer.CreateMaterializerForMessage(responseMessage, responseInfo, materializerType, queryComponents, plan, payloadKind);
}
internal MaterializeAtom(ResponseInfo responseInfo, IEnumerable<ODataEntry> entries, Type elementType)
{
Type type;
this.responseInfo = responseInfo;
this.elementType = elementType;
this.MergeOptionValue = responseInfo.MergeOption;
this.expectingPrimitiveValue = PrimitiveType.IsKnownNullableType(elementType);
Type expectedType = GetTypeForMaterializer(this.expectingPrimitiveValue, this.elementType, responseInfo.MaxProtocolVersion, out type);
QueryComponents queryComponents = new QueryComponents(null, Util.DataServiceVersionEmpty, elementType, null, null);
this.materializer = new ODataEntriesEntityMaterializer(entries, responseInfo, queryComponents, expectedType, null);
}
internal MaterializeAtom(ResponseInfo responseInfo, QueryComponents queryComponents, ProjectionPlan plan, IODataResponseMessage responseMessage, ODataPayloadKind payloadKind)
{
Type type;
this.responseInfo = responseInfo;
this.elementType = queryComponents.LastSegmentType;
this.MergeOptionValue = responseInfo.MergeOption;
this.expectingPrimitiveValue = PrimitiveType.IsKnownNullableType(this.elementType);
Type materializerType = GetTypeForMaterializer(this.expectingPrimitiveValue, this.elementType, responseInfo.MaxProtocolVersion, out type);
this.materializer = ODataMaterializer.CreateMaterializerForMessage(responseMessage, responseInfo, materializerType, queryComponents, plan, payloadKind);
}
internal MaterializeAtom(ResponseInfo responseInfo, IEnumerable <ODataEntry> entries, Type elementType)
{
Type type;
this.responseInfo = responseInfo;
this.elementType = elementType;
this.MergeOptionValue = responseInfo.MergeOption;
this.expectingPrimitiveValue = PrimitiveType.IsKnownNullableType(elementType);
Type expectedType = GetTypeForMaterializer(this.expectingPrimitiveValue, this.elementType, responseInfo.MaxProtocolVersion, out type);
QueryComponents queryComponents = new QueryComponents(null, Util.DataServiceVersionEmpty, elementType, null, null);
this.materializer = new ODataEntriesEntityMaterializer(entries, responseInfo, queryComponents, expectedType, null);
}
/// <summary>The QueryComponents associated with this request</summary>
/// <param name="model">The client model.</param>
/// <returns>an instance of QueryComponents.</returns>
internal override QueryComponents QueryComponents(ClientEdmModel model)
{
if (this.queryComponents == null)
{
Type elementType = typeof(TElement);
// for 1..* navigation properties we need the type of the entity of the collection that is being navigated to. Otherwise we use TElement.
elementType = PrimitiveType.IsKnownType(elementType) || WebUtil.IsCLRTypeCollection(elementType, model) ? elementType : TypeSystem.GetElementType(elementType);
this.queryComponents = new QueryComponents(this.requestUri, Util.DataServiceVersionEmpty, elementType, null, null);
}
return(this.queryComponents);
}
/// <summary>
/// constructor
/// </summary>
/// <param name="responseInfo">originating context</param>
/// <param name="entries">entries that needs to be materialized.</param>
/// <param name="elementType">result type.</param>
/// <param name="format">The format of the response being materialized from.</param>
internal MaterializeAtom(ResponseInfo responseInfo, IEnumerable <ODataEntry> entries, Type elementType, ODataFormat format)
{
this.responseInfo = responseInfo;
this.elementType = elementType;
this.expectingPrimitiveValue = PrimitiveType.IsKnownNullableType(elementType);
Type implementationType;
Type materializerType = GetTypeForMaterializer(this.expectingPrimitiveValue, this.elementType, responseInfo.Model, out implementationType);
QueryComponents qc = new QueryComponents(null, Util.DataServiceVersionEmpty, elementType, null, null);
ODataMaterializerContext context = new ODataMaterializerContext(responseInfo);
EntityTrackingAdapter entityTrackingAdapter = new EntityTrackingAdapter(responseInfo.EntityTracker, responseInfo.MergeOption, responseInfo.Model, responseInfo.Context);
this.materializer = new ODataEntriesEntityMaterializer(entries, context, entityTrackingAdapter, qc, materializerType, null, format);
}
internal static MaterializeAtom Materialize(
ResponseInfo responseInfo,
QueryComponents queryComponents,
ProjectionPlan plan,
string contentType,
IODataResponseMessage message,
ODataPayloadKind expectedPayloadKind)
{
Debug.Assert(null != queryComponents, "querycomponents");
Debug.Assert(null != message, "message");
// If there is no content (For e.g. /Customers(1)/BestFriend is null), we need to return empty results.
if (message.StatusCode == (int)HttpStatusCode.NoContent || String.IsNullOrEmpty(contentType))
{
return(MaterializeAtom.EmptyResults);
}
return(new MaterializeAtom(responseInfo, queryComponents, plan, message, expectedPayloadKind));
}
#pragma warning restore 649
#endif
#endregion Private fields
/// <summary>
/// constructor
/// </summary>
/// <param name="responseInfo">originating context</param>
/// <param name="queryComponents">Query components (projection, expected type)</param>
/// <param name="plan">Projection plan (if compiled in an earlier query).</param>
/// <param name="responseMessage">responseMessage</param>
/// <param name="payloadKind">The kind of the payload to materialize.</param>
internal MaterializeAtom(
ResponseInfo responseInfo,
QueryComponents queryComponents,
ProjectionPlan plan,
IODataResponseMessage responseMessage,
ODataPayloadKind payloadKind)
{
Debug.Assert(queryComponents != null, "queryComponents != null");
this.responseInfo = responseInfo;
this.elementType = queryComponents.LastSegmentType;
this.expectingPrimitiveValue = PrimitiveType.IsKnownNullableType(elementType);
Debug.Assert(responseMessage != null, "Response message is null! Did you mean to use Materializer.ResultsWrapper/EmptyResults?");
this.responseMessage = responseMessage;
Type implementationType;
Type materializerType = GetTypeForMaterializer(this.expectingPrimitiveValue, this.elementType, responseInfo.Model, out implementationType);
this.materializer = ODataMaterializer.CreateMaterializerForMessage(responseMessage, responseInfo, materializerType, queryComponents, plan, payloadKind);
}
internal static MaterializeAtom Materialize(DataServiceContext context, QueryComponents queryComponents, ProjectionPlan plan, string contentType, Stream response)
{
Debug.Assert(null != queryComponents, "querycomponents");
string mime = null;
Encoding encoding = null;
if (!String.IsNullOrEmpty(contentType))
{
HttpProcessUtility.ReadContentType(contentType, out mime, out encoding);
}
if (String.Equals(mime, XmlConstants.MimeApplicationAtom, StringComparison.OrdinalIgnoreCase) ||
String.Equals(mime, XmlConstants.MimeApplicationXml, StringComparison.OrdinalIgnoreCase))
{
if (null != response)
{
XmlReader reader = XmlUtil.CreateXmlReader(response, encoding);
return new MaterializeAtom(context, reader, queryComponents, plan, context.MergeOption);
}
}
return MaterializeAtom.EmptyResults;
}
/// <summary>
/// Creates an instance of <see cref="MaterializeAtom"/> for the given plan.
/// </summary>
/// <param name="plan">The projection plan.</param>
/// <param name="payloadKind">expected payload kind.</param>
/// <returns>A new materializer instance</returns>
private MaterializeAtom CreateMaterializer(ProjectionPlan plan, ODataPayloadKind payloadKind)
{
QueryComponents queryComponents = this.ServiceRequest.QueryComponents(this.responseInfo.Model);
// In V2, in projection path, we did not check for assignability between the expected type and the type returned by the type resolver.
if (plan != null || queryComponents.Projection != null)
{
this.RequestInfo.TypeResolver.IsProjectionRequest();
}
var responseMessageWrapper = new HttpWebResponseMessage(
new HeaderCollection(this.responseMessage),
this.responseMessage.StatusCode,
this.GetResponseStream,
this.AllowDirectNetworkStreamReading ? this.responseMessage : null); // If AllowDirectNetworkStreamReading is true, the responseMessage will be disposed later when enumeration has finished.
return DataServiceRequest.Materialize(
this.responseInfo,
queryComponents,
plan,
this.ContentType,
responseMessageWrapper,
payloadKind);
}
/// <summary>
/// Sets the value of the Accept header for a query.
/// </summary>
/// <param name="headers">The headers to modify.</param>
/// <param name="components">The query components for the request.</param>
internal void SetRequestAcceptHeaderForQuery(HeaderCollection headers, QueryComponents components)
{
this.SetAcceptHeaderAndCharset(headers, this.ChooseMediaType(/*valueIfUsingAtom*/ MimeApplicationAtomOrXml, components.HasSelectQueryOption));
}
internal QueryOperationResponse<TElement> Execute<TElement>(DataServiceContext context, QueryComponents queryComponents)
{
QueryResult result = null;
try
{
DataServiceRequest<TElement> serviceRequest = new DataServiceRequest<TElement>(queryComponents, this.Plan);
result = serviceRequest.CreateResult(this, context, null, null);
result.Execute();
return result.ProcessResult<TElement>(context, this.Plan);
}
catch (InvalidOperationException ex)
{
QueryOperationResponse operationResponse = result.GetResponse<TElement>(MaterializeAtom.EmptyResults);
if (null != operationResponse)
{
if (context.IgnoreResourceNotFoundException)
{
DataServiceClientException cex = ex as DataServiceClientException;
if (cex != null && cex.StatusCode == (int)HttpStatusCode.NotFound)
{
return (QueryOperationResponse<TElement>)operationResponse;
}
}
operationResponse.Error = ex;
throw new DataServiceQueryException(Strings.DataServiceException_GeneralError, ex, operationResponse);
}
throw;
}
}
/// <summary>
/// Initializes a new <see cref="QueryComponents"/> instance that can
/// be used for this continuation.
/// </summary>
/// <returns>A new initializes <see cref="QueryComponents"/>.</returns>
internal QueryComponents CreateQueryComponents()
{
QueryComponents result = new QueryComponents(this.NextLinkUri, Util.DataServiceVersionEmpty, this.Plan.LastSegmentType, null, null);
return(result);
}
public ODataEntriesEntityMaterializer(IEnumerable<ODataEntry> entries, ResponseInfo responseInfo, QueryComponents queryComponents, Type expectedType, ProjectionPlan materializeEntryPlan) : base(responseInfo, queryComponents, expectedType, materializeEntryPlan)
{
this.feedEntries = entries.GetEnumerator();
}
internal QueryComponents CreateQueryComponents()
{
QueryComponents result = new QueryComponents(this.NextLinkUri, Util.DataServiceVersionEmpty, this.Plan.LastSegmentType, null, null);
return result;
}
public ODataReaderEntityMaterializer(ODataMessageReader odataMessageReader, ODataReader reader, ResponseInfo responseInfo, QueryComponents queryComponents, Type expectedType, ProjectionPlan materializeEntryPlan) : base(responseInfo, queryComponents, expectedType, materializeEntryPlan)
{
this.messageReader = odataMessageReader;
this.itemReader = new ODataFeedOrEntryReader(reader, responseInfo);
}
public static ODataMaterializer CreateMaterializerForMessage(IODataResponseMessage responseMessage, System.Data.Services.Client.ResponseInfo responseInfo, Type materializerType, QueryComponents queryComponents, ProjectionPlan plan, ODataPayloadKind payloadKind)
{
ODataMaterializer materializer2;
bool projectionQuery = (plan != null) || (queryComponents.Projection != null);
ODataMessageReader messageReader = CreateODataMessageReader(responseMessage, responseInfo, projectionQuery, ref payloadKind);
IEdmType expectedType = null;
try
{
ODataMaterializer materializer;
if (materializerType != typeof(object))
{
expectedType = ClientEdmModel.GetModel(responseInfo.MaxProtocolVersion).GetOrCreateEdmType(materializerType);
}
if ((payloadKind == ODataPayloadKind.Entry) || (payloadKind == ODataPayloadKind.Feed))
{
if ((expectedType != null) && (expectedType.TypeKind != EdmTypeKind.Entity))
{
throw System.Data.Services.Client.Error.InvalidOperation(System.Data.Services.Client.Strings.AtomMaterializer_InvalidNonEntityType(materializerType.FullName));
}
ODataReader reader = CreateODataReader(messageReader, payloadKind, expectedType, responseInfo.MaxProtocolVersion);
materializer = new ODataReaderEntityMaterializer(messageReader, reader, responseInfo, queryComponents, materializerType, plan);
}
else
{
switch (payloadKind)
{
case ODataPayloadKind.Property:
if ((expectedType != null) && (expectedType.TypeKind == EdmTypeKind.Entity))
{
throw System.Data.Services.Client.Error.InvalidOperation(System.Data.Services.Client.Strings.AtomMaterializer_InvalidEntityType(materializerType.FullName));
}
break;
case ODataPayloadKind.EntityReferenceLink:
case ODataPayloadKind.EntityReferenceLinks:
materializer = new ODataLinksMaterializer(messageReader, responseInfo, materializerType, queryComponents.SingleResult);
goto Label_013A;
case ODataPayloadKind.Value:
materializer = new ODataValueMaterializer(messageReader, responseInfo, materializerType, queryComponents.SingleResult);
goto Label_013A;
case ODataPayloadKind.BinaryValue:
case ODataPayloadKind.Collection:
case ODataPayloadKind.ServiceDocument:
case ODataPayloadKind.MetadataDocument:
goto Label_0129;
case ODataPayloadKind.Error:
{
ODataError error = messageReader.ReadError();
throw new ODataErrorException(error.Message, error);
}
default:
goto Label_0129;
}
materializer = new ODataPropertyMaterializer(messageReader, responseInfo, materializerType, queryComponents.SingleResult);
}
goto Label_013A;
Label_0129:
throw System.Data.Services.Client.Error.InvalidOperation(System.Data.Services.Client.Strings.AtomMaterializer_InvalidResponsePayload(responseInfo.DataNamespace));
Label_013A:
materializer2 = materializer;
}
catch (Exception exception)
{
if (CommonUtil.IsCatchableExceptionType(exception))
{
messageReader.Dispose();
}
throw;
}
return materializer2;
}
/// <summary>
/// Creates the result object for the specified query parameters.
/// </summary>
/// <param name="source">The source object for the request.</param>
/// <param name="context">The data service context.</param>
/// <param name="callback">The AsyncCallback delegate.</param>
/// <param name="state">The state object for the callback.</param>
/// <param name="method">async method name at the source.</param>
/// <returns>Result representing the create request. The request has not been initiated yet.</returns>
private QueryResult CreateExecuteResult(object source, DataServiceContext context, AsyncCallback callback, object state, string method)
{
Debug.Assert(null != context, "context is null");
QueryComponents qc = this.QueryComponents(context.Model);
RequestInfo requestInfo = new RequestInfo(context);
Debug.Assert(
string.CompareOrdinal(XmlConstants.HttpMethodPost, qc.HttpMethod) == 0 ||
string.CompareOrdinal(XmlConstants.HttpMethodGet, qc.HttpMethod) == 0,
"Only get and post are supported in the execute pipeline, which should have been caught earlier");
if (qc.UriOperationParameters != null)
{
Debug.Assert(qc.UriOperationParameters.Any(), "qc.UriOperationParameters.Any()");
Serializer serializer = new Serializer(requestInfo);
this.RequestUri = serializer.WriteUriOperationParametersToUri(this.RequestUri, qc.UriOperationParameters);
}
HeaderCollection headers = new HeaderCollection();
if (string.CompareOrdinal(XmlConstants.HttpMethodPost, qc.HttpMethod) == 0)
{
if (qc.BodyOperationParameters == null)
{
// set the content length to be 0 if there are no operation parameters.
headers.SetHeader(XmlConstants.HttpContentLength, "0");
}
else
{
context.Format.SetRequestContentTypeForOperationParameters(headers);
}
}
// Validate and set the request DSV and MDSV header
headers.SetRequestVersion(qc.Version, requestInfo.MaxProtocolVersionAsVersion);
requestInfo.Format.SetRequestAcceptHeaderForQuery(headers, qc);
// We currently do not have a descriptor to expose to the user for invoking something through Execute. Ideally we could expose an OperationDescriptor.
ODataRequestMessageWrapper requestMessage = new RequestInfo(context).WriteHelper.CreateRequestMessage(context.CreateRequestArgsAndFireBuildingRequest(qc.HttpMethod, this.RequestUri, headers, context.HttpStack, null /*descriptor*/));
requestMessage.FireSendingRequest2(null /*descriptor*/);
QueryResult queryResult = null;
if (qc.BodyOperationParameters != null)
{
Debug.Assert(
string.CompareOrdinal(XmlConstants.HttpMethodPost, qc.HttpMethod) == 0,
"qc.HttpMethod == XmlConstants.HttpMethodPost");
Debug.Assert(qc.BodyOperationParameters.Any(), "unexpected body operation parameter count of zero.");
Serializer serializer = new Serializer(requestInfo);
serializer.WriteBodyOperationParameters(qc.BodyOperationParameters, requestMessage);
// pass in the request stream so that request payload can be written to the http webrequest.
queryResult = new QueryResult(source, method, this, requestMessage, requestInfo, callback, state, requestMessage.CachedRequestStream);
}
else
{
queryResult = new QueryResult(source, method, this, requestMessage, requestInfo, callback, state);
}
return(queryResult);
}
/// <summary>
/// Synchronizely get the query set count from the server by executing the $count=value query
/// </summary>
/// <param name="context">The context</param>
/// <returns>The server side count of the query set</returns>
internal long GetQuerySetCount(DataServiceContext context)
{
Debug.Assert(null != context, "context is null");
Version requestVersion = this.QueryComponents(context.Model).Version;
if (requestVersion == null || requestVersion.Major < 2)
{
// minimum DSV for $count is V2.
requestVersion = Util.DataServiceVersion2;
}
QueryResult response = null;
QueryComponents qc = this.QueryComponents(context.Model);
Uri requestUri = qc.Uri;
DataServiceRequest <long> serviceRequest = new DataServiceRequest <long>(requestUri, qc, null);
HeaderCollection headers = new HeaderCollection();
// Validate and set the request DSV header
headers.SetRequestVersion(requestVersion, context.MaxProtocolVersionAsVersion);
context.Format.SetRequestAcceptHeaderForCount(headers);
string httpMethod = XmlConstants.HttpMethodGet;
ODataRequestMessageWrapper request = context.CreateODataRequestMessage(
context.CreateRequestArgsAndFireBuildingRequest(httpMethod, requestUri, headers, context.HttpStack, null /*descriptor*/),
new string[] { XmlConstants.HttpRequestAccept } /*headersToReset*/,
null /*descriptor*/);
response = new QueryResult(this, Util.ExecuteMethodName, serviceRequest, request, new RequestInfo(context), null, null);
response.AllowDirectNetworkStreamReading = context.AllowDirectNetworkStreamReading;
IODataResponseMessage responseMessage = null;
try
{
responseMessage = response.ExecuteQuery();
if (HttpStatusCode.NoContent != response.StatusCode)
{
StreamReader sr = new StreamReader(response.GetResponseStream());
long r = -1;
try
{
r = XmlConvert.ToInt64(sr.ReadToEnd());
}
finally
{
sr.Close();
}
return(r);
}
else
{
throw new DataServiceQueryException(Strings.DataServiceRequest_FailGetCount, response.Failure);
}
}
catch (InvalidOperationException ex)
{
QueryOperationResponse operationResponse = null;
operationResponse = response.GetResponse <long>(MaterializeAtom.EmptyResults);
if (null != operationResponse)
{
operationResponse.Error = ex;
throw new DataServiceQueryException(Strings.DataServiceException_GeneralError, ex, operationResponse);
}
throw;
}
finally
{
WebUtil.DisposeMessage(responseMessage);
}
}
/// <summary>
/// execute uri and materialize result
/// </summary>
/// <typeparam name="TElement">element type</typeparam>
/// <param name="context">context</param>
/// <param name="queryComponents">query components for request to execute</param>
/// <returns>enumerable of results</returns>
internal QueryOperationResponse <TElement> Execute <TElement>(DataServiceContext context, QueryComponents queryComponents)
{
QueryResult result = null;
try
{
Uri requestUri = queryComponents.Uri;
DataServiceRequest <TElement> serviceRequest = new DataServiceRequest <TElement>(requestUri, queryComponents, this.Plan);
result = serviceRequest.CreateExecuteResult(this, context, null, null, Util.ExecuteMethodName);
result.AllowDirectNetworkStreamReading = context.AllowDirectNetworkStreamReading;
result.ExecuteQuery();
return(result.ProcessResult <TElement>(this.Plan));
}
catch (InvalidOperationException ex)
{
if (result != null)
{
QueryOperationResponse operationResponse = result.GetResponse <TElement>(MaterializeAtom.EmptyResults);
if (null != operationResponse)
{
if (context.IgnoreResourceNotFoundException)
{
DataServiceClientException cex = ex as DataServiceClientException;
if (cex != null && cex.StatusCode == (int)HttpStatusCode.NotFound)
{
// don't throw
return((QueryOperationResponse <TElement>)operationResponse);
}
}
operationResponse.Error = ex;
throw new DataServiceQueryException(Strings.DataServiceException_GeneralError, ex, operationResponse);
}
}
throw;
}
}
