/// <summary>
/// This method retrieves an XmlReader within a specified context.
/// Moreover it collects label values before or after a geometry could be found.
/// </summary>
/// <param name="reader">An XmlReader instance that is the origin of a created sub-reader</param>
/// <param name="labels">A dictionary for recording label values. Pass 'null' to ignore searching for label values</param>
/// <param name="pathNodes">A list of <see cref="IPathNode"/> instances defining the context of the retrieved reader</param>
/// <returns>A sub-reader of the XmlReader given as argument</returns>
protected XmlReader GetSubReaderOf(XmlReader reader, Dictionary <string, string> labels, List <IPathNode> pathNodes)
{
string errorMessage = null;
while (reader.Read())
{
if (reader.NodeType == XmlNodeType.Element)
{
if (pathNodes[0].Matches(reader))
{
pathNodes.RemoveAt(0);
if (pathNodes.Count > 0)
{
return(GetSubReaderOf(reader.ReadSubtree(), null, pathNodes));
}
return(reader.ReadSubtree());
}
if (labels != null)
{
if (_LabelNode != null)
{
if (_LabelNode.Matches(reader))
{
var labelName = reader.Name;
var labelValue = reader.ReadString();
// remove the namespace
if (labelName.Contains(":"))
{
labelName = labelName.Split(':')[1];
}
labels.Add(labelName, labelValue);
}
}
}
if (_ServiceExceptionNode.Matches(reader))
{
errorMessage = reader.ReadInnerXml();
Trace.TraceError("A service exception occured: " + errorMessage);
throw new Exception("A service exception occured: " + errorMessage);
}
}
}
return(null);
}
/// <summary>
/// This method retrieves an XmlReader within a specified context.
/// Moreover it collects label values before or after a geometry could be found.
/// </summary>
/// <param name="reader">An XmlReader instance that is the origin of a created sub-reader</param>
/// <param name="labelValue">A string array for recording a found label value. Pass 'null' to ignore searching for label values</param>
/// <param name="pathNodes">A list of <see cref="PathNodeDepr"/> instances defining the context of the retrieved reader</param>
/// <returns>A sub-reader of the XmlReader given as argument</returns>
protected XmlReader GetSubReaderOf(XmlReader reader, string[] labelValue, List <IPathNode> pathNodes)
{
string errorMessage = null;
while (reader.Read())
{
if (reader.NodeType == XmlNodeType.Element)
{
if (pathNodes[0].Matches(reader))
{
pathNodes.RemoveAt(0);
if (pathNodes.Count > 0)
{
return(GetSubReaderOf(reader.ReadSubtree(), null, pathNodes));
}
return(reader.ReadSubtree());
}
if (labelValue != null)
{
if (_LabelNode != null)
{
if (_LabelNode.Matches(reader))
{
labelValue[0] = reader.ReadElementString();
}
}
}
if (_ServiceExceptionNode.Matches(reader))
{
errorMessage = reader.ReadInnerXml();
Trace.TraceError("A service exception occured: " + errorMessage);
throw new Exception("A service exception occured: " + errorMessage);
}
}
}
return(null);
}