public async Task ExecuteAsync(ODataUri odataUri, OeRequestHeaders headers, Stream stream, CancellationToken cancellationToken)
{
OeParseUriContext parseUriContext = ParseUri(odataUri);
parseUriContext.Headers = headers;
parseUriContext.EntitySetAdapter = _dataAdapter.GetEntitySetAdapter(parseUriContext.EntitySet.Name);
Object dataContext = null;
try
{
dataContext = _dataAdapter.CreateDataContext();
if (parseUriContext.IsCountSegment)
{
int count = _dataAdapter.ExecuteScalar <int>(dataContext, parseUriContext);
byte[] buffer = System.Text.Encoding.UTF8.GetBytes(count.ToString());
stream.Write(buffer, 0, buffer.Length);
}
else
{
using (Db.OeEntityAsyncEnumerator asyncEnumerator = _dataAdapter.ExecuteEnumerator(dataContext, parseUriContext, cancellationToken))
await Writers.OeGetWriter.SerializeAsync(BaseUri, parseUriContext, asyncEnumerator, stream).ConfigureAwait(false);
}
}
finally
{
if (dataContext != null)
{
_dataAdapter.CloseDataContext(dataContext);
}
}
}
public OeQueryContext CreateQueryContext(ODataUri odataUri, OeMetadataLevel metadataLevel, Type returnClrType)
{
String entitySetName = _dataAdapter.EntitySetMetaAdapters.FindByClrType(returnClrType).EntitySetName;
IEdmEntitySet entitySet = _model.FindDeclaredEntitySet(entitySetName);
OePropertyAccessor[] accessors = OePropertyAccessor.CreateFromType(returnClrType, entitySet);
Db.OeEntitySetAdapter entitySetAdapter = _dataAdapter.GetEntitySetAdapter(entitySet.Name);
return(new OeQueryContext(_model, odataUri, entitySet, null, false, 0, false,
_dataAdapter.IsDatabaseNullHighestValue, metadataLevel, ref entitySetAdapter)
{
EntryFactory = OeEntryFactory.CreateEntryFactory(entitySet, accessors),
});
}
public async Task ExecuteAsync(Uri requestUri, OeRequestHeaders headers, Stream stream, CancellationToken cancellationToken)
{
OeParseUriContext parseUriContext = ParseUri(requestUri);
parseUriContext.Headers = headers;
parseUriContext.EntitySetAdapter = _dataAdapter.GetEntitySetAdapter(parseUriContext.EntitySet.Name);
Object dataContext = null;
try
{
dataContext = _dataAdapter.CreateDataContext();
if (parseUriContext.IsCountSegment)
{
int count = _dataAdapter.ExecuteScalar <int>(parseUriContext, dataContext);
byte[] buffer = System.Text.Encoding.UTF8.GetBytes(count.ToString());
stream.Write(buffer, 0, buffer.Length);
}
else
{
long?count = null;
if (parseUriContext.ODataUri.QueryCount.GetValueOrDefault())
{
var countParseUriContext = new OeParseUriContext(parseUriContext.EdmModel
, parseUriContext.ODataUri
, parseUriContext.EntitySet
, parseUriContext.ParseNavigationSegments
, true);
countParseUriContext.Headers = parseUriContext.Headers;
countParseUriContext.EntitySetAdapter = parseUriContext.EntitySetAdapter;
count = _dataAdapter.ExecuteScalar <int>(countParseUriContext, dataContext);
}
using (Db.OeEntityAsyncEnumerator asyncEnumerator = _dataAdapter.ExecuteEnumerator(parseUriContext, dataContext, cancellationToken))
await Writers.OeGetWriter.SerializeAsync(BaseUri, parseUriContext, asyncEnumerator, stream, count).ConfigureAwait(false);
}
}
finally
{
if (dataContext != null)
{
_dataAdapter.CloseDataContext(dataContext);
}
}
}
public OeQueryContext CreateQueryContext(ODataUri odataUri, int pageSize, bool navigationNextLink, OeMetadataLevel metadataLevel)
{
List <OeParseNavigationSegment> navigationSegments = null;
if (odataUri.Path.LastSegment is KeySegment ||
odataUri.Path.LastSegment is NavigationPropertySegment)
{
navigationSegments = new List <OeParseNavigationSegment>();
ODataPathSegment previousSegment = null;
foreach (ODataPathSegment segment in odataUri.Path)
{
if (segment is NavigationPropertySegment)
{
var navigationSegment = segment as NavigationPropertySegment;
if (navigationSegment == odataUri.Path.LastSegment)
{
navigationSegments.Add(new OeParseNavigationSegment(navigationSegment, null));
}
else
{
navigationSegments.Add(new OeParseNavigationSegment(navigationSegment, null));
}
}
else if (segment is KeySegment)
{
IEdmEntitySet previousEntitySet;
var keySegment = segment as KeySegment;
NavigationPropertySegment navigationSegment = null;
if (previousSegment is EntitySetSegment)
{
var previousEntitySetSegment = previousSegment as EntitySetSegment;
previousEntitySet = previousEntitySetSegment.EntitySet;
}
else if (previousSegment is NavigationPropertySegment)
{
navigationSegment = previousSegment as NavigationPropertySegment;
previousEntitySet = (IEdmEntitySet)navigationSegment.NavigationSource;
}
else
{
throw new InvalidOperationException("invalid segment");
}
FilterClause keyFilter = CreateFilterClause(previousEntitySet, keySegment.Keys);
navigationSegments.Add(new OeParseNavigationSegment(navigationSegment, keyFilter));
}
previousSegment = segment;
}
}
if (pageSize > 0)
{
odataUri.Top = pageSize;
IEdmEntityType edmEntityType = GetEntityType(odataUri.Path, navigationSegments);
odataUri.OrderBy = OeSkipTokenParser.GetUniqueOrderBy(_edmModel, edmEntityType, odataUri.OrderBy);
}
var entitySetSegment = (EntitySetSegment)odataUri.Path.FirstSegment;
IEdmEntitySet entitySet = entitySetSegment.EntitySet;
Db.OeEntitySetAdapter entitySetAdapter = _dataAdapter.GetEntitySetAdapter(entitySet.Name);
bool isCountSegment = odataUri.Path.LastSegment is CountSegment;
return(new OeQueryContext(_edmModel, odataUri, entitySet, navigationSegments,
isCountSegment, pageSize, navigationNextLink, _dataAdapter.IsDatabaseNullHighestValue, metadataLevel, ref entitySetAdapter));
}