private static void ReadChangesElement(XmlReader reader, WritingSystemChangeLog log)
{
AssertOnElement(reader, "Changes");
while (reader.Read() && !(reader.NodeType == XmlNodeType.EndElement && reader.Name == "Changes"))
{
if (reader.IsStartElement())
{
switch (reader.Name)
{
case "Change":
ReadChangeElement(reader, log);
break;
case "Merge":
ReadMergeElement(reader, log);
break;
case "Add":
ReadAddElement(reader, log);
break;
case "Delete":
ReadDeleteElement(reader, log);
break;
}
}
}
}
private static void WriteChanges(XmlWriter writer, WritingSystemChangeLog log)
{
foreach (var logEvent in log.Events)
{
WriteLogEvent(writer, logEvent);
}
}
public void Write(WritingSystemChangeLog log)
{
if (log == null)
{
throw new ArgumentNullException("log");
}
if (!File.Exists(FilePath))
{
string logDirectory = Path.GetDirectoryName(FilePath);
Directory.CreateDirectory(logDirectory);
}
using (var streamWriter = new StreamWriter(FilePath))
{
using (var writer = XmlWriter.Create(streamWriter, CanonicalXmlSettings.CreateXmlWriterSettings()))
{
writer.WriteStartDocument();
writer.WriteStartElement("WritingSystemChangeLog");
writer.WriteAttributeString("Version", log.Version);
writer.WriteStartElement("Changes");
WriteChanges(writer, log);
writer.WriteEndElement(); // Changes
writer.WriteEndElement(); // WritingSystemChangeLog
writer.Close();
}
}
}
private static void ReadDeleteElement(XmlReader reader, WritingSystemChangeLog log)
{
AssertOnElement(reader, "Delete");
string producer = reader.GetAttribute("Producer") ?? string.Empty;
string producerVersion = reader.GetAttribute("ProducerVersion") ?? string.Empty;
string dateTimeString = reader.GetAttribute("TimeStamp") ?? string.Empty;
var dateTime = DateTime.Parse(dateTimeString);
string id = "";
while (reader.Read() && !(reader.NodeType == XmlNodeType.EndElement && reader.Name == "Delete"))
{
if (reader.IsStartElement())
{
switch (reader.Name)
{
case "Id":
reader.Read(); // get to the text node
id = reader.Value;
break;
}
}
}
log.AddEvent(new WritingSystemLogDeleteEvent(id)
{
DateTime = dateTime, Producer = producer, ProducerVersion = producerVersion
});
}
private static void ReadLog(XmlReader reader, WritingSystemChangeLog log)
{
Debug.Assert(reader != null);
if (reader.MoveToContent() != XmlNodeType.Element || reader.Name != "WritingSystemChangeLog")
{
throw new ApplicationException("Unable to load writing system definition: Missing <WritingSystemChangeLog> tag.");
}
log.Version = reader.GetAttribute("Version") ?? string.Empty;
if (FindStartElement(reader, "Changes"))
{
ReadChangesElement(reader, log);
}
}
public void Read(WritingSystemChangeLog log)
{
if (File.Exists(FilePath))
{
try
{
using (StreamReader streamReader = File.OpenText(FilePath))
{
using (XmlReader reader = XmlReader.Create(streamReader, _xmlReadSettings))
{
ReadLog(reader, log);
}
}
}
catch (FormatException) //This exception is thrown when the time format is locale specific. This was the case for a very short time when the log was introduced. (WS-34444)
{
File.Delete(FilePath);
}
}
}
private static void ReadMergeElement(XmlReader reader, WritingSystemChangeLog log)
{
AssertOnElement(reader, "Merge");
string producer = reader.GetAttribute("Producer") ?? string.Empty;
string producerVersion = reader.GetAttribute("ProducerVersion") ?? string.Empty;
string dateTimeString = reader.GetAttribute("TimeStamp") ?? string.Empty;
var dateTime = DateTime.Parse(dateTimeString);
string from = "";
string to = "";
while (reader.Read() && !(reader.NodeType == XmlNodeType.EndElement && reader.Name == "Merge"))
{
if (reader.IsStartElement())
{
switch (reader.Name)
{
case "From":
reader.Read(); // get to the text node
from = reader.Value;
break;
case "To":
reader.Read(); // get to the text node
to = reader.Value;
break;
}
}
}
log.AddEvent(new WritingSystemLogConflateEvent(from, to){ DateTime = dateTime, Producer = producer, ProducerVersion = producerVersion });
}
private static void ReadLog(XmlReader reader, WritingSystemChangeLog log)
{
Debug.Assert(reader != null);
if (reader.MoveToContent() != XmlNodeType.Element || reader.Name != "WritingSystemChangeLog")
{
throw new ApplicationException("Unable to load writing system definition: Missing <WritingSystemChangeLog> tag.");
}
log.Version = reader.GetAttribute("Version") ?? string.Empty;
if (FindStartElement(reader, "Changes"))
{
ReadChangesElement(reader, log);
}
}
private static void ReadChangesElement(XmlReader reader, WritingSystemChangeLog log)
{
AssertOnElement(reader, "Changes");
while (reader.Read() && !(reader.NodeType == XmlNodeType.EndElement && reader.Name == "Changes"))
{
if (reader.IsStartElement())
{
switch (reader.Name)
{
case "Change":
ReadChangeElement(reader, log);
break;
case "Merge":
ReadMergeElement(reader, log);
break;
case "Add":
ReadAddElement(reader, log);
break;
case "Delete":
ReadDeleteElement(reader, log);
break;
}
}
}
}
private static void ReadAddElement(XmlReader reader, WritingSystemChangeLog log)
{
AssertOnElement(reader, "Add");
string producer = reader.GetAttribute("Producer") ?? string.Empty;
string producerVersion = reader.GetAttribute("ProducerVersion") ?? string.Empty;
string dateTimeString = reader.GetAttribute("TimeStamp") ?? string.Empty;
var dateTime = DateTime.Parse(dateTimeString);
string id = "";
while (reader.Read() && !(reader.NodeType == XmlNodeType.EndElement && reader.Name == "Add"))
{
if (reader.IsStartElement())
{
switch (reader.Name)
{
case "Id":
reader.Read(); // get to the text node
id = reader.Value;
break;
}
}
}
log.AddEvent(new WritingSystemLogAddEvent(id) { DateTime = dateTime, Producer = producer, ProducerVersion = producerVersion });
}
public void Write(WritingSystemChangeLog log)
{
if (log == null)
{
throw new ArgumentNullException("log");
}
if (!File.Exists(FilePath))
{
string logDirectory = Path.GetDirectoryName(FilePath);
Directory.CreateDirectory(logDirectory);
}
using (var streamWriter = new StreamWriter(FilePath))
{
using (var writer = XmlWriter.Create(streamWriter, CanonicalXmlSettings.CreateXmlWriterSettings()))
{
writer.WriteStartDocument();
writer.WriteStartElement("WritingSystemChangeLog");
writer.WriteAttributeString("Version", log.Version);
writer.WriteStartElement("Changes");
WriteChanges(writer, log);
writer.WriteEndElement(); // Changes
writer.WriteEndElement(); // WritingSystemChangeLog
writer.Close();
}
}
}
public void Write(WritingSystemChangeLog log)
{
}
public void Write(WritingSystemChangeLog log)
{
}
private static void WriteChanges(XmlWriter writer, WritingSystemChangeLog log)
{
foreach (var logEvent in log.Events)
{
WriteLogEvent(writer, logEvent);
}
}
public void Read(WritingSystemChangeLog log)
{
}
public void Read(WritingSystemChangeLog log)
{
if (File.Exists(FilePath))
{
try
{
using (StreamReader streamReader = File.OpenText(FilePath))
{
using (XmlReader reader = XmlReader.Create(streamReader, _xmlReadSettings))
{
ReadLog(reader, log);
}
}
}
catch(FormatException) //This exception is thrown when the time format is locale specific. This was the case for a very short time when the log was introduced. (WS-34444)
{
File.Delete(FilePath);
}
}
}
public void Read(WritingSystemChangeLog log)
{
}
