/// <summary>
/// Initializes a new instance of the <see cref="DescriptorRegistryValues"/> class.
/// </summary>
/// <param name="path">The file path.</param>
/// <exception cref="ArgumentNullException"><paramref name="path"/> is null.</exception>
internal DescriptorRegistryValues(string path)
{
if (path is null)
{
throw new ArgumentNullException(nameof(path));
}
Dictionary <string, DescriptorRegistryItem> persistentItems = new Dictionary <string, DescriptorRegistryItem>(StringComparer.Ordinal);
Dictionary <string, DescriptorRegistryItem> sessionItems = new Dictionary <string, DescriptorRegistryItem>(StringComparer.Ordinal);
bool isOldFormat = false;
using (FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read))
{
ReadOnlyDictionary <string, DescriptorRegistryItem> values = null;
if (DescriptorRegistryFileHeader.TryCreate(fs, out DescriptorRegistryFileHeader header))
{
if (header.FileVersion == 1)
{
long dataLength = fs.Length - fs.Position;
byte[] data = new byte[dataLength];
fs.ProperRead(data, 0, data.Length);
using (MemoryStream ms = new MemoryStream(data))
{
values = PSFilterPdn.DataContractSerializerUtil.Deserialize <ReadOnlyDictionary <string, DescriptorRegistryItem> >(ms);
}
}
}
else
{
fs.Position = 0;
SelfBinder binder = new SelfBinder();
BinaryFormatter bf = new BinaryFormatter()
{
Binder = binder
};
values = (ReadOnlyDictionary <string, DescriptorRegistryItem>)bf.Deserialize(fs);
isOldFormat = true;
}
if (values != null && values.Count > 0)
{
foreach (KeyValuePair <string, DescriptorRegistryItem> item in values)
{
persistentItems.Add(item.Key, item.Value);
}
}
}
persistedValues = new ReadOnlyDictionary <string, DescriptorRegistryItem>(persistentItems);
sessionValues = new ReadOnlyDictionary <string, DescriptorRegistryItem>(sessionItems);
dirty = isOldFormat;
}
public static bool TryCreate(Stream stream, out DescriptorRegistryFileHeader header)
{
header = null;
bool result = false;
if (stream.Length > 8)
{
byte[] headerBytes = new byte[8];
stream.ProperRead(headerBytes, 0, headerBytes.Length);
if (CheckHeaderSignature(headerBytes))
{
header = new DescriptorRegistryFileHeader(BitConverter.ToInt32(headerBytes, 4));
result = true;
}
}
return(result);
}
