private void UpdateFromFile()
{
using (var stream = FileInfo.Open(FileMode.Open, FileAccess.Read, FileShare.Read))
using (var decoder = new BinaryDecoder(stream))
{
Magic = decoder.ReadFixed(4);
if (!Magic.SequenceEqual(MAGIC_BYTES))
{
throw new Exception("Invalid Avro file");
}
Metadata = decoder.ReadMap(s => s.ReadBytes());
if (Metadata.TryGetValue("avro.schema", out var schemaBytes))
{
Schema = AvroParser.ReadSchema(Encoding.UTF8.GetString(schemaBytes));
}
else
{
throw new Exception("Schema not found");
}
if (Metadata.TryGetValue("avro.codec", out var codecBytes))
{
if (Enum.TryParse <Codec>(Encoding.UTF8.GetString(codecBytes), true, out var codec))
{
Codec = codec;
}
else
{
throw new Exception("Codec not found");
}
}
else
{
Codec = null;
}
Sync = decoder.ReadFixed(16);
FileHeaderSize = stream.Position;
}
}
public void DecodeFixed(byte[] expectedValue, int expectedLength, byte[] value)
{
using (var stream = new MemoryStream(value))
using (var decoder = new BinaryDecoder(stream))
{
var decode = decoder.ReadFixed(expectedValue.Length);
Assert.AreEqual(expectedLength, stream.Position, "Decode offset error");
Assert.AreEqual(expectedValue, decode);
decode = new byte[decode.Length];
stream.Seek(0, SeekOrigin.Begin);
decoder.ReadFixed(decode);
Assert.AreEqual(expectedLength, stream.Position, "Decode offset error");
Assert.AreEqual(expectedValue, decode);
stream.Seek(0, SeekOrigin.Begin);
decoder.SkipFixed(expectedValue.Length);
Assert.AreEqual(expectedLength, stream.Position, "Skip offset error");
}
}
public void TestFixed(byte[] expected)
{
using (var stream = new MemoryStream())
using (var encoder = new BinaryEncoder(stream))
using (var decoder = new BinaryDecoder(stream))
{
encoder.WriteFixed(expected);
stream.Seek(0, SeekOrigin.Begin);
var actual = decoder.ReadFixed(new byte[expected.Length]);
Assert.AreEqual(expected, actual);
}
}
