private static AtomDataKind ParseStateForReader(XmlReader reader)
{
Debug.Assert(reader != null, "reader != null");
Debug.Assert(
reader.NodeType == XmlNodeType.Element || reader.NodeType == XmlNodeType.EndElement,
"reader.NodeType == XmlNodeType.Element || EndElement -- otherwise can't determine");
AtomDataKind result = AtomDataKind.Custom;
string elementName = reader.LocalName;
string namespaceURI = reader.NamespaceURI;
if (Util.AreSame(XmlConstants.AtomNamespace, namespaceURI))
{
if (Util.AreSame(XmlConstants.AtomEntryElementName, elementName))
{
result = AtomDataKind.Entry;
}
else if (Util.AreSame(XmlConstants.AtomFeedElementName, elementName))
{
result = AtomDataKind.Feed;
}
else if (Util.AreSame(XmlConstants.AtomLinkElementName, elementName) &&
Util.AreSame(XmlConstants.AtomLinkNextAttributeString, reader.GetAttribute(XmlConstants.AtomLinkRelationAttributeName)))
{
result = AtomDataKind.PagingLinks;
}
}
else if (Util.AreSame(XmlConstants.DataWebMetadataNamespace, namespaceURI))
{
if (Util.AreSame(XmlConstants.RowCountElement, elementName))
{
result = AtomDataKind.FeedCount;
}
}
return(result);
}
/// <summary>Consumes the next chunk of content from the underlying XML reader.</summary>
/// <returns>
/// true if another piece of content is available, identified by DataKind.
/// false if there is no more content.
/// </returns>
internal bool Read()
{
// When an external caller 'insists', we'll come all the way down (which is the 'most local'
// scope at which this is known), and unwind as a no-op.
if (this.DataKind == AtomDataKind.Finished)
{
return false;
}
while (this.reader.Read())
{
if (ShouldIgnoreNode(this.reader))
{
continue;
}
Debug.Assert(
this.reader.NodeType == XmlNodeType.Element || this.reader.NodeType == XmlNodeType.EndElement,
"this.reader.NodeType == XmlNodeType.Element || this.reader.NodeType == XmlNodeType.EndElement -- otherwise we should have ignored or thrown");
AtomDataKind readerData = ParseStateForReader(this.reader);
if (this.reader.NodeType == XmlNodeType.EndElement)
{
// The only case in which we expect to see an end-element at the top level
// is for a feed. Custom elements and entries should be consumed by
// their own parsing methods. However we are tolerant of additional EndElements,
// which at this point mean we have nothing else to consume.
break;
}
switch (readerData)
{
case AtomDataKind.Custom:
if (this.DataKind == AtomDataKind.None)
{
this.kind = AtomDataKind.Custom;
return true;
}
else
{
MaterializeAtom.SkipToEnd(this.reader);
continue;
}
case AtomDataKind.Entry:
this.kind = AtomDataKind.Entry;
this.ParseCurrentEntry(out this.entry);
return true;
case AtomDataKind.Feed:
if (this.DataKind == AtomDataKind.None)
{
this.feed = new AtomFeed();
this.kind = AtomDataKind.Feed;
return true;
}
throw new InvalidOperationException(Strings.AtomParser_FeedUnexpected);
case AtomDataKind.FeedCount:
this.ParseCurrentFeedCount();
break;
case AtomDataKind.PagingLinks:
if (this.feed == null)
{
// paging link outside of feed?
throw new InvalidOperationException(Strings.AtomParser_PagingLinkOutsideOfFeed);
}
this.kind = AtomDataKind.PagingLinks;
this.ParseCurrentFeedPagingLinks();
return true;
default:
Debug.Assert(false, "Atom Parser is in a wrong state...Did you add a new AtomDataKind?");
break;
}
}
this.kind = AtomDataKind.Finished;
this.entry = null;
return false;
}
internal bool Read()
{
if (this.DataKind == AtomDataKind.Finished)
{
return false;
}
while (this.reader.Read())
{
if (ShouldIgnoreNode(this.reader))
{
continue;
}
Debug.Assert(
this.reader.NodeType == XmlNodeType.Element || this.reader.NodeType == XmlNodeType.EndElement,
"this.reader.NodeType == XmlNodeType.Element || this.reader.NodeType == XmlNodeType.EndElement -- otherwise we should have ignored or thrown");
AtomDataKind readerData = ParseStateForReader(this.reader);
if (this.reader.NodeType == XmlNodeType.EndElement)
{
break;
}
switch (readerData)
{
case AtomDataKind.Custom:
if (this.DataKind == AtomDataKind.None)
{
this.kind = AtomDataKind.Custom;
return true;
}
else
{
MaterializeAtom.SkipToEnd(this.reader);
continue;
}
case AtomDataKind.Entry:
this.kind = AtomDataKind.Entry;
this.ParseCurrentEntry(out this.entry);
return true;
case AtomDataKind.Feed:
if (this.DataKind == AtomDataKind.None)
{
this.feed = new AtomFeed();
this.kind = AtomDataKind.Feed;
return true;
}
throw new InvalidOperationException(Strings.AtomParser_FeedUnexpected);
case AtomDataKind.FeedCount:
this.ParseCurrentFeedCount();
break;
case AtomDataKind.PagingLinks:
if (this.feed == null)
{
throw new InvalidOperationException(Strings.AtomParser_PagingLinkOutsideOfFeed);
}
this.kind = AtomDataKind.PagingLinks;
this.ParseCurrentFeedPagingLinks();
return true;
default:
Debug.Assert(false, "Atom Parser is in a wrong state...Did you add a new AtomDataKind?");
break;
}
}
this.kind = AtomDataKind.Finished;
this.entry = null;
return false;
}
internal bool Read()
{
if (this.DataKind == AtomDataKind.Finished)
{
return(false);
}
while (this.reader.Read())
{
if (ShouldIgnoreNode(this.reader))
{
continue;
}
Debug.Assert(
this.reader.NodeType == XmlNodeType.Element || this.reader.NodeType == XmlNodeType.EndElement,
"this.reader.NodeType == XmlNodeType.Element || this.reader.NodeType == XmlNodeType.EndElement -- otherwise we should have ignored or thrown");
AtomDataKind readerData = ParseStateForReader(this.reader);
if (this.reader.NodeType == XmlNodeType.EndElement)
{
break;
}
switch (readerData)
{
case AtomDataKind.Custom:
if (this.DataKind == AtomDataKind.None)
{
this.kind = AtomDataKind.Custom;
return(true);
}
else
{
MaterializeAtom.SkipToEnd(this.reader);
continue;
}
case AtomDataKind.Entry:
this.kind = AtomDataKind.Entry;
this.ParseCurrentEntry(out this.entry);
return(true);
case AtomDataKind.Feed:
if (this.DataKind == AtomDataKind.None)
{
this.feed = new AtomFeed();
this.kind = AtomDataKind.Feed;
return(true);
}
throw new InvalidOperationException(Strings.AtomParser_FeedUnexpected);
case AtomDataKind.FeedCount:
this.ParseCurrentFeedCount();
break;
case AtomDataKind.PagingLinks:
if (this.feed == null)
{
throw new InvalidOperationException(Strings.AtomParser_PagingLinkOutsideOfFeed);
}
this.kind = AtomDataKind.PagingLinks;
this.ParseCurrentFeedPagingLinks();
return(true);
default:
Debug.Assert(false, "Atom Parser is in a wrong state...Did you add a new AtomDataKind?");
break;
}
}
this.kind = AtomDataKind.Finished;
this.entry = null;
return(false);
}
/// <summary>Consumes the next chunk of content from the underlying XML reader.</summary>
/// <returns>
/// true if another piece of content is available, identified by DataKind.
/// false if there is no more content.
/// </returns>
internal bool Read()
{
// When an external caller 'insists', we'll come all the way down (which is the 'most local'
// scope at which this is known), and unwind as a no-op.
if (this.DataKind == AtomDataKind.Finished)
{
return(false);
}
while (this.reader.Read())
{
if (ShouldIgnoreNode(this.reader))
{
continue;
}
Debug.Assert(
this.reader.NodeType == XmlNodeType.Element || this.reader.NodeType == XmlNodeType.EndElement,
"this.reader.NodeType == XmlNodeType.Element || this.reader.NodeType == XmlNodeType.EndElement -- otherwise we should have ignored or thrown");
AtomDataKind readerData = ParseStateForReader(this.reader);
if (this.reader.NodeType == XmlNodeType.EndElement)
{
// The only case in which we expect to see an end-element at the top level
// is for a feed. Custom elements and entries should be consumed by
// their own parsing methods. However we are tolerant of additional EndElements,
// which at this point mean we have nothing else to consume.
break;
}
switch (readerData)
{
case AtomDataKind.Custom:
if (this.DataKind == AtomDataKind.None)
{
this.kind = AtomDataKind.Custom;
return(true);
}
else
{
MaterializeAtom.SkipToEnd(this.reader);
continue;
}
case AtomDataKind.Entry:
this.kind = AtomDataKind.Entry;
this.ParseCurrentEntry(out this.entry);
return(true);
case AtomDataKind.Feed:
if (this.DataKind == AtomDataKind.None)
{
this.feed = new AtomFeed();
this.kind = AtomDataKind.Feed;
return(true);
}
throw new InvalidOperationException(Strings.AtomParser_FeedUnexpected);
case AtomDataKind.FeedCount:
this.ParseCurrentFeedCount();
break;
case AtomDataKind.PagingLinks:
if (this.feed == null)
{
// paging link outside of feed?
throw new InvalidOperationException(Strings.AtomParser_PagingLinkOutsideOfFeed);
}
this.kind = AtomDataKind.PagingLinks;
this.ParseCurrentFeedPagingLinks();
return(true);
default:
Debug.Assert(false, "Atom Parser is in a wrong state...Did you add a new AtomDataKind?");
break;
}
}
this.kind = AtomDataKind.Finished;
this.entry = null;
return(false);
}
