internal virtual DataServiceQueryContinuation GetContinuation(IEnumerable key)
{
Debug.Assert(this.materializer != null, "Materializer is null!");
DataServiceQueryContinuation result;
if (key == null)
{
if ((this.expectingSingleValue && !this.moved) || (!this.expectingSingleValue && !this.materializer.IsEndOfStream))
{
throw new InvalidOperationException(Strings.MaterializeFromAtom_TopLevelLinkNotAvailable);
}
if (this.expectingSingleValue || this.materializer.CurrentFeed == null)
{
result = null;
}
else
{
result = DataServiceQueryContinuation.Create(
this.materializer.CurrentFeed.NextLink,
this.materializer.MaterializeEntryPlan);
}
}
else
{
if (!this.materializer.NextLinkTable.TryGetValue(key, out result))
{
throw new ArgumentException(Strings.MaterializeFromAtom_CollectionKeyNotPresentInLinkTable);
}
}
return(result);
}
/// <summary>
/// Returns the next link URI for the collection key
/// </summary>
/// <param name="key">The collection for which the Uri is returned, or null, if the top level link is to be returned</param>
/// <returns>An Uri pointing to the next page for the collection</returns>
internal virtual DataServiceQueryContinuation GetContinuation(IEnumerable key)
{
Debug.Assert(this.materializer != null, "Materializer is null!");
DataServiceQueryContinuation result;
if (key == null)
{
if ((this.expectingPrimitiveValue && !this.moved) || (!this.expectingPrimitiveValue && !this.materializer.IsEndOfStream))
{
// expectingSingleValue && !moved : haven't started parsing single value (single value should not have next link anyway)
// !expectingSingleValue && !IsEndOfStream : collection type feed did not finish parsing yet
throw new InvalidOperationException(Strings.MaterializeFromAtom_TopLevelLinkNotAvailable);
}
// we have already moved to the end of stream
// are we singleton or just an entry?
if (this.expectingPrimitiveValue || this.materializer.CurrentFeed == null)
{
result = null;
}
else
{
// DEVNOTE(pqian): The next link uri should never be edited by the client, and therefore it must be absolute
result = DataServiceQueryContinuation.Create(
this.materializer.CurrentFeed.NextPageLink,
this.materializer.MaterializeEntryPlan);
}
}
else
{
if (!this.materializer.NextLinkTable.TryGetValue(key, out result))
{
// someone has asked for a collection that's "out of scope" or doesn't exist
throw new ArgumentException(Strings.MaterializeFromAtom_CollectionKeyNotPresentInLinkTable);
}
}
return(result);
}
internal virtual DataServiceQueryContinuation GetContinuation(IEnumerable key)
{
DataServiceQueryContinuation continuation;
if (key == null)
{
if ((this.expectingPrimitiveValue && !this.moved) || (!this.expectingPrimitiveValue && !this.materializer.IsEndOfStream))
{
throw new InvalidOperationException(System.Data.Services.Client.Strings.MaterializeFromAtom_TopLevelLinkNotAvailable);
}
if (this.expectingPrimitiveValue || (this.materializer.CurrentFeed == null))
{
return(null);
}
return(DataServiceQueryContinuation.Create(this.materializer.CurrentFeed.NextPageLink, this.materializer.MaterializeEntryPlan));
}
if (!this.materializer.NextLinkTable.TryGetValue(key, out continuation))
{
throw new ArgumentException(System.Data.Services.Client.Strings.MaterializeFromAtom_CollectionKeyNotPresentInLinkTable);
}
return(continuation);
}
