private IAsyncEnumerable <Object> ExecuteGet(IEdmModel refModel, ODataUri odataUri, OeRequestHeaders headers, IQueryable source)
{
if (_modelBoundProvider != null)
{
_modelBoundProvider.Validate(_edmModel, odataUri);
}
_queryContext = new OeQueryContext(refModel, odataUri)
{
MetadataLevel = headers.MetadataLevel
};
if (odataUri.Path.LastSegment is OperationSegment)
{
return(OeOperationHelper.ApplyBoundFunction(_queryContext));
}
if (source != null)
{
_queryContext.QueryableSource = e => e == _queryContext.EntryFactory.EntitySet ? source : null;
}
if (_queryContext.ODataUri.Path.LastSegment is CountSegment)
{
headers.ResponseContentType = OeRequestHeaders.TextDefault.ContentType;
int count = _dataAdapter.ExecuteScalar <int>(_dataContext, _queryContext);
return((IAsyncEnumerable <Object>)Infrastructure.AsyncEnumeratorHelper.ToAsyncEnumerable(Task.FromResult(count)));
}
return(_dataAdapter.Execute(_dataContext, _queryContext));
}
public async Task ExecuteAsync(ODataUri odataUri, OeRequestHeaders headers, Stream stream, CancellationToken cancellationToken)
{
OeQueryContext queryContext = CreateQueryContext(odataUri, headers.MaxPageSize, headers.NavigationNextLink, headers.MetadataLevel);
Db.OeDataAdapter dataAdapter = _edmModel.GetDataAdapter(queryContext.EdmModel.EntityContainer);
Object dataContext = null;
try
{
dataContext = dataAdapter.CreateDataContext();
if (queryContext.IsCountSegment)
{
headers.ResponseContentType = OeRequestHeaders.TextDefault.ContentType;
int count = dataAdapter.ExecuteScalar <int>(dataContext, queryContext);
byte[] buffer = System.Text.Encoding.UTF8.GetBytes(count.ToString(CultureInfo.InvariantCulture));
stream.Write(buffer, 0, buffer.Length);
}
else
{
using (Db.OeAsyncEnumerator asyncEnumerator = dataAdapter.ExecuteEnumerator(dataContext, queryContext, cancellationToken))
await Writers.OeGetWriter.SerializeAsync(queryContext, asyncEnumerator, headers.ContentType, stream).ConfigureAwait(false);
}
}
finally
{
if (dataContext != null)
{
dataAdapter.CloseDataContext(dataContext);
}
}
}
public async Task ExecuteAsync(ODataUri odataUri, OeRequestHeaders headers, Stream stream, CancellationToken cancellationToken)
{
if (_modelBoundProvider != null)
{
_modelBoundProvider.Validate(_edmModel, odataUri);
}
var queryContext = new OeQueryContext(_edmModel, odataUri)
{
MetadataLevel = headers.MetadataLevel
};
if (queryContext.ODataUri.Path.LastSegment is OperationSegment)
{
using (IAsyncEnumerator <Object> asyncEnumerator = OeOperationHelper.ApplyBoundFunction(queryContext).GetEnumerator())
await Writers.OeGetWriter.SerializeAsync(queryContext, asyncEnumerator, headers.ContentType, stream, cancellationToken).ConfigureAwait(false);
return;
}
Object dataContext = null;
Db.OeDataAdapter dataAdapter = queryContext.EdmModel.GetDataAdapter(queryContext.EdmModel.EntityContainer);
try
{
dataContext = dataAdapter.CreateDataContext();
if (odataUri.Path.LastSegment is CountSegment)
{
headers.ResponseContentType = OeRequestHeaders.TextDefault.ContentType;
int count = dataAdapter.ExecuteScalar <int>(dataContext, queryContext);
byte[] buffer = System.Text.Encoding.UTF8.GetBytes(count.ToString(CultureInfo.InvariantCulture));
stream.Write(buffer, 0, buffer.Length);
}
else
{
using (IAsyncEnumerator <Object> asyncEnumerator = dataAdapter.Execute(dataContext, queryContext).GetEnumerator())
await Writers.OeGetWriter.SerializeAsync(queryContext, asyncEnumerator, headers.ContentType, stream, cancellationToken).ConfigureAwait(false);
}
}
finally
{
if (dataContext != null)
{
dataAdapter.CloseDataContext(dataContext);
}
}
}
public static int GetNestedCount(IEdmModel edmModel, Db.IOeDbEnumerator dbEnumerator)
{
Db.IOeDbEnumerator parentEnumerator = dbEnumerator.ParentEnumerator;
ODataUri odataUri = OeNextPageLinkBuilder.GetCountODataUri(edmModel, parentEnumerator.EntryFactory, dbEnumerator.EntryFactory.NavigationSelectItem, parentEnumerator.Current);
var queryContext = new OeQueryContext(edmModel, odataUri);
IEdmEntitySet entitySet = (odataUri.Path.FirstSegment as EntitySetSegment).EntitySet;
Db.OeDataAdapter dataAdapter = edmModel.GetDataAdapter(entitySet.Container);
Object dataContext = null;
try
{
dataContext = dataAdapter.CreateDataContext();
return(dataAdapter.ExecuteScalar <int>(dataContext, queryContext));
}
finally
{
if (dataContext != null)
{
dataAdapter.CloseDataContext(dataContext);
}
}
}
