/// <summary>
/// Parses XML from a
/// <see cref="string"/>
/// ,
/// fixing the illegal control character optionally.
/// </summary>
/// <param name="input">a <code>String</code> containing the XMP packet</param>
/// <param name="options">the parsing options</param>
/// <returns>Returns an XML DOM-Document.</returns>
/// <exception cref="Com.Adobe.Xmp.XMPException">Thrown when the parsing fails.</exception>
private static XmlDocument ParseXmlFromString(string input, ParseOptions options)
{
InputSource source = new InputSource(new Sharpen.StringReader(input));
try
{
return ParseInputSource(source);
}
catch (XMPException e)
{
if (e.GetErrorCode() == XMPErrorConstants.Badxml && options.GetFixControlChars())
{
source = new InputSource(new FixASCIIControlsReader(new Sharpen.StringReader(input)));
return ParseInputSource(source);
}
else
{
throw;
}
}
}
/// <summary>Runs the XML-Parser.</summary>
/// <param name="source">an <code>InputSource</code></param>
/// <returns>Returns an XML DOM-Document.</returns>
/// <exception cref="Com.Adobe.Xmp.XMPException">Wraps parsing and I/O-exceptions into an XMPException.</exception>
private static XmlDocument ParseInputSource(InputSource source)
{
try
{
XmlDocument doc = new XmlDocument();
doc.Load(source.GetStream());
return doc;
}
catch (XmlException e)
{
throw new XMPException("XML parsing failure", XMPErrorConstants.Badxml, e);
}
catch (IOException e)
{
throw new XMPException("Error reading the XML-file", XMPErrorConstants.Badstream, e);
}
catch (Exception e)
{
throw new XMPException("XML Parser not correctly configured", XMPErrorConstants.Unknown, e);
}
}
/// <summary>
/// Parses XML from a byte buffer,
/// fixing the encoding (Latin-1 to UTF-8) and illegal control character optionally.
/// </summary>
/// <param name="buffer">a byte buffer containing the XMP packet</param>
/// <param name="options">the parsing options</param>
/// <returns>Returns an XML DOM-Document.</returns>
/// <exception cref="Com.Adobe.Xmp.XMPException">Thrown when the parsing fails.</exception>
private static XmlDocument ParseXmlFromBytebuffer(ByteBuffer buffer, ParseOptions options)
{
InputSource source = new InputSource(buffer.GetByteStream());
try
{
return ParseInputSource(source);
}
catch (XMPException e)
{
if (e.GetErrorCode() == XMPErrorConstants.Badxml || e.GetErrorCode() == XMPErrorConstants.Badstream)
{
if (options.GetAcceptLatin1())
{
buffer = Latin1Converter.Convert(buffer);
}
if (options.GetFixControlChars())
{
try
{
string encoding = buffer.GetEncoding();
System.IO.StreamReader fixReader = new FixASCIIControlsReader(new InputStreamReader(buffer.GetByteStream(), encoding));
return ParseInputSource(new InputSource(fixReader));
}
catch (UnsupportedEncodingException)
{
// can normally not happen as the encoding is provided by a util function
throw new XMPException("Unsupported Encoding", XMPErrorConstants.Internalfailure, e);
}
}
source = new InputSource(buffer.GetByteStream());
return ParseInputSource(source);
}
else
{
throw;
}
}
}