/// <summary>
/// Creates and returns a chunked sequence of <see cref="XmlReader"/> objects with a maximum of the specified <paramref name="size"/> of XML node elements located on a depth of 1.
/// </summary>
/// <param name="reader">The <see cref="XmlReader"/> object that contains the XML data to chunk into smaller <see cref="XmlReader"/> objects for a batch run or similar.</param>
/// <param name="size">The amount of XML node elements allowed per <see cref="XmlReader"/> object. Default is 128 XML node element.</param>
/// <param name="setup">The <see cref="XmlWriterSettings"/> which need to be configured.</param>
/// <returns>An sequence of <see cref="XmlReader"/> objects that contains no more than the specified <paramref name="size"/> of XML node elements from the <paramref name="reader" /> object.</returns>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="reader"/> is null.
/// </exception>
/// <exception cref="System.ArgumentException">
/// The <see cref="XmlReader.Read"/> method of the <paramref name="reader"/> object has already been called.
/// </exception>
public static IEnumerable <XmlReader> Chunk(XmlReader reader, int size, Action <XmlWriterSettings> setup = null)
{
if (reader == null)
{
throw new ArgumentNullException(nameof(reader));
}
if (reader.ReadState != ReadState.Initial)
{
throw new ArgumentException("The Read method of the XmlReader object has already been called.", nameof(reader));
}
List <XmlReader> outerReaders = new List <XmlReader>();
XmlReaderSettings readerSettings = reader.Settings;
if (MoveToFirstElement(reader))
{
XmlQualifiedEntity rootElement = new XmlQualifiedEntity(reader.Prefix, reader.LocalName, reader.NamespaceURI);
List <XmlReader> innerReaders = new List <XmlReader>();
Stream result;
while (reader.Read())
{
if (reader.Depth > 1)
{
continue;
}
switch (reader.NodeType)
{
case XmlNodeType.Element:
XPathDocument document = new XPathDocument(reader.ReadSubtree());
XPathNavigator navigator = document.CreateNavigator();
innerReaders.Add(navigator.ReadSubtree());
break;
}
if (innerReaders.Count != size)
{
continue;
}
result = XmlWriterUtility.CreateXml(ChunkCore, innerReaders, rootElement, setup);
outerReaders.Add(XmlReader.Create(result, readerSettings));
innerReaders.Clear();
}
if (innerReaders.Count > 0)
{
result = XmlWriterUtility.CreateXml(ChunkCore, innerReaders, rootElement, setup);
outerReaders.Add(XmlReader.Create(result, readerSettings));
innerReaders.Clear();
}
}
return(outerReaders);
}
/// <summary>
/// Remove the namespace declarations from the specified <see cref="Stream"/> <paramref name="value"/>.
/// </summary>
/// <param name="value">An XML <see cref="Stream"/> to purge namespace declarations from.</param>
/// <param name="omitXmlDeclaration">if set to <c>true</c> omit the XML declaration; otherwise <c>false</c>. The default is false.</param>
/// <param name="encoding">The text encoding to use.</param>
/// <returns>A <see cref="Stream"/> object representing the specified <paramref name="value"/> but with no namespace declarations.</returns>
public static Stream RemoveNamespaceDeclarations(Stream value, bool omitXmlDeclaration, Encoding encoding)
{
if (value == null)
{
throw new ArgumentNullException(nameof(value));
}
IXPathNavigable navigable = XPathNavigableConverter.FromStream(value, true); // todo: leaveStreamOpen
XPathNavigator navigator = navigable.CreateNavigator();
MemoryStream output;
MemoryStream tempOutput = null;
try
{
tempOutput = new MemoryStream();
using (XmlWriter writer = XmlWriter.Create(tempOutput, XmlWriterUtility.CreateSettings(o =>
{
o.Encoding = encoding;
o.OmitXmlDeclaration = omitXmlDeclaration;
})))
{
WriteElements(navigator, writer);
writer.Flush();
}
output = tempOutput;
output.Position = 0;
tempOutput = null;
}
finally
{
if (tempOutput != null)
{
tempOutput.Dispose();
}
}
return(output);
}
/// <summary>
/// Copies the specified <paramref name="reader"/> using the specified delegate <paramref name="copier"/> and returns the result as an XML stream.
/// </summary>
/// <typeparam name="T">The type of the parameter of the delegate <paramref name="copier"/>.</typeparam>
/// <param name="reader">The <see cref="XmlReader"/> object that contains the XML data.</param>
/// <param name="copier">The delegate that will create an in-memory copy of <paramref name="reader"/> as a XML stream.</param>
/// <param name="arg">The parameter of the delegate <paramref name="copier"/>.</param>
/// <param name="setup">The <see cref="XmlCopyOptions"/> which need to be configured.</param>
/// <returns>A <see cref="Stream"/> holding the XML copied by the delegate <paramref name="copier"/> from the source <paramref name="reader"/>.</returns>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="reader"/> is null - or - <paramref name="copier"/> is null.
/// </exception>
public static Stream Copy <T>(this XmlReader reader, Action <XmlWriter, XmlReader, T> copier, T arg, Action <XmlCopyOptions> setup = null)
{
return(XmlWriterUtility.Copy(reader, copier, arg, setup));
}
/// <summary>
/// Copies the specified <paramref name="reader"/> using the specified delegate <paramref name="copier"/> and returns the result as an XML stream.
/// </summary>
/// <typeparam name="T1">The type of the first parameter of the delegate <paramref name="copier"/>.</typeparam>
/// <typeparam name="T2">The type of the second parameter of the delegate <paramref name="copier"/>.</typeparam>
/// <typeparam name="T3">The type of the third parameter of the delegate <paramref name="copier"/>.</typeparam>
/// <param name="reader">The <see cref="XmlReader"/> object that contains the XML data.</param>
/// <param name="copier">The delegate that will create an in-memory copy of <paramref name="reader"/> as a XML stream.</param>
/// <param name="arg1">The first parameter of the delegate <paramref name="copier"/>.</param>
/// <param name="arg2">The second parameter of the delegate <paramref name="copier"/>.</param>
/// <param name="arg3">The third parameter of the delegate <paramref name="copier"/>.</param>
/// <param name="setup">The <see cref="XmlCopyOptions"/> which need to be configured.</param>
/// <returns>A <see cref="Stream"/> holding the XML copied by the delegate <paramref name="copier"/> from the source <paramref name="reader"/>.</returns>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="reader"/> is null - or - <paramref name="copier"/> is null.
/// </exception>
public static Stream Copy <T1, T2, T3>(this XmlReader reader, Action <XmlWriter, XmlReader, T1, T2, T3> copier, T1 arg1, T2 arg2, T3 arg3, Action <XmlCopyOptions> setup = null)
{
return(XmlWriterUtility.Copy(reader, copier, arg1, arg2, arg3, setup));
}
/// <summary>
/// Copies everything from the specified <paramref name="reader"/> and returns the result as an XML stream.
/// </summary>
/// <param name="reader">The <see cref="XmlReader"/> object that contains the XML data.</param>
/// <param name="setup">The <see cref="XmlCopyOptions"/> which need to be configured.</param>
/// <returns>A <see cref="Stream"/> holding an exact copy of the source <paramref name="reader"/>.</returns>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="reader"/> is null.
/// </exception>
public static Stream Copy(this XmlReader reader, Action <XmlCopyOptions> setup = null)
{
return(XmlWriterUtility.Copy(reader, setup));
}
