public JsonTreeWriter(Stream stream, TreeSerializationSettings settings = null)
{
Settings = settings ?? TreeSerializationSettings.DefaultSettings;
_writer = new JsonTextWriter(new StreamWriter(stream, Encoding.UTF8, 8 * 1024, leaveOpen: Settings.LeaveStreamOpen));
_writer.Formatting = (Settings.Verbose ? Formatting.Indented : Formatting.None);
}
// Write item, then read back and return size diagnostics instead of round-tripped instance
public static TreeDiagnostics Diagnostics <T>(T value, Func <T> buildT, TreeFormat format) where T : ITreeSerializable
{
TreeSerializationSettings settings = new TreeSerializationSettings()
{
LeaveStreamOpen = true
};
using (MemoryStream stream = new MemoryStream())
{
using (ITreeWriter writer = Writer(format, stream, settings))
{
value.Write(writer);
}
stream.Seek(0, SeekOrigin.Begin);
using (TreeDiagnosticsReader reader = new TreeDiagnosticsReader(Reader(format, stream, settings)))
{
T roundTripped = buildT();
roundTripped.Read(reader);
// Test double dispose
reader.Dispose();
return(reader.Tree);
}
}
}
// Use default constructor if available
public static T RoundTrip <T>(
T value,
TreeFormat format,
TreeSerializationSettings settings = null,
bool testDoubleDispose = false) where T : ITreeSerializable, new()
{
return(RoundTrip(value, () => new T(), format, settings, testDoubleDispose));
}
public JsonTreeReader(Stream stream, TreeSerializationSettings settings = null)
{
Settings = settings ?? TreeSerializationSettings.DefaultSettings;
_reader = new JsonTextReader(new StreamReader(stream, Encoding.UTF8, true, 8 * 1024, leaveOpen: Settings.LeaveStreamOpen));
// TreeReaders required to read the first token on open, to allow single value reading to work
Read();
}
public static void VerifySkip <T>(T value, TreeFormat format) where T : ITreeSerializable
{
// Test serialization details
using (MemoryStream stream = new MemoryStream())
{
TreeSerializationSettings settings = new TreeSerializationSettings()
{
LeaveStreamOpen = true
};
using (ITreeWriter writer = Writer(format, stream, settings))
{
value.Write(writer);
}
long bytesWritten = stream.Position;
// Read tokens individually and verify 'None' returned at end
stream.Seek(0, SeekOrigin.Begin);
using (ITreeReader reader = Reader(format, stream, settings))
{
while (reader.Read())
{
// Verify each token type is coming back properly (no reading random bytes)
Assert.True((byte)reader.TokenType <= (byte)TreeToken.BlockArray);
}
Assert.Equal(TreeToken.None, reader.TokenType);
Assert.Equal(bytesWritten, stream.Position);
}
// Verify Skip once skips everything (each ITreeSerializable must be one value or one root array or object
stream.Seek(0, SeekOrigin.Begin);
using (ITreeReader reader = Reader(format, stream, settings))
{
reader.Skip();
Assert.Equal(TreeToken.None, reader.TokenType);
Assert.Equal(bytesWritten, stream.Position);
}
// For objects, verify each property can be skipped correctly
// Each Skip should read the value, so that the next token is the next PropertyName
stream.Seek(0, SeekOrigin.Begin);
using (ITreeReader reader = Reader(format, stream, settings))
{
if (reader.TokenType == TreeToken.StartObject)
{
Empty empty = new Empty();
empty.Read(reader);
Assert.Equal(bytesWritten, stream.Position);
}
}
}
}
public static ITreeWriter Writer(TreeFormat format, Stream stream, TreeSerializationSettings settings)
{
switch (format)
{
case TreeFormat.Binary:
return(new BinaryTreeWriter(stream, settings));
case TreeFormat.Json:
return(new JsonTreeWriter(stream, settings));
default:
throw new NotImplementedException($"Writer doesn't know how to build for '{format}'.");
}
}
private static void TestIntegers(TreeFormat format)
{
TreeSerializationSettings settings = new TreeSerializationSettings()
{
LeaveStreamOpen = true
};
using (MemoryStream stream = new MemoryStream())
{
using (ITreeWriter writer = Writer(format, stream, settings))
{
writer.WriteStartArray();
for (int i = -1; i < 300; i += 7)
{
writer.WriteValue(i);
}
writer.WriteEndArray();
}
long bytesWritten = stream.Position;
stream.Seek(0, SeekOrigin.Begin);
using (ITreeReader reader = Reader(format, stream, settings))
{
Assert.Equal(TreeToken.StartArray, reader.TokenType);
for (int i = -1; i < 300; i += 7)
{
Assert.True(reader.Read());
Assert.Equal(TreeToken.Integer, reader.TokenType);
Assert.Equal(i, reader.ReadAsInt32());
}
Assert.True(reader.Read());
Assert.Equal(TreeToken.EndArray, reader.TokenType);
Assert.False(reader.Read());
}
Assert.Equal(bytesWritten, stream.Position);
}
}
// Reference RoundTrip implementation - no extra verification
private static T RoundTrip_Basic <T>(T value, Func <T> buildT, TreeFormat format) where T : ITreeSerializable
{
TreeSerializationSettings settings = new TreeSerializationSettings()
{
LeaveStreamOpen = true
};
using (MemoryStream stream = new MemoryStream())
{
using (ITreeWriter writer = Writer(format, stream, settings))
{
value.Write(writer);
}
stream.Seek(0, SeekOrigin.Begin);
using (ITreeReader reader = Reader(format, stream, settings))
{
T roundTripped = buildT();
roundTripped.Read(reader);
return(roundTripped);
}
}
}
public static void Load(this ITreeSerializable item, Stream stream, TreeFormat format, TreeSerializationSettings settings = null)
{
using (ITreeReader reader = TreeSerializer.Reader(format, stream, settings))
{
item.Read(reader);
}
}
public static void Load(this ITreeSerializable item, string filePath, TreeFormat format, TreeSerializationSettings settings = null)
{
Load(item, File.OpenRead(filePath), format, settings);
}
public static void Save(this ITreeSerializable item, Stream stream, TreeFormat format, TreeSerializationSettings settings = null)
{
using (ITreeWriter writer = TreeSerializer.Writer(format, stream, settings))
{
item.Write(writer);
}
}
public static void Save(this ITreeSerializable item, string filePath, TreeFormat format, TreeSerializationSettings settings = null)
{
Save(item, File.Create(filePath), format, settings);
}
public static void Basics(TreeFormat format)
{
Random r = new Random();
// Test integers with specific values (for varying length encodings)
TestIntegers(format);
// Test serialization of each primitive value type (bool, string, long, double)
Sample sample = new Sample(new Random());
sample.AssertEqual(RoundTrip <Sample>(sample, format));
// Test serialization of containers (read must leave last token of nested items so loop finds next property name properly)
SingleContainer <Sample> container = new SingleContainer <Sample>(sample);
container.AssertEqual(RoundTrip <SingleContainer <Sample> >(container, format));
// Test diagnostics doesn't throw when over Reader
TreeDiagnostics diagnostics = Diagnostics(sample, format);
// Test serialization of all supported primitive array types
RoundTripArray(new byte[] { 0, 4, 16 }, format);
RoundTripArray(new char[] { 'S', 'o', 'A' }, format);
RoundTripArray(new sbyte[] { 0, 4, 16 }, format);
RoundTripArray(new ushort[] { 0, 4, 16 }, format);
RoundTripArray(new short[] { 0, 4, 16 }, format);
RoundTripArray(new uint[] { 0, 4, 16 }, format);
RoundTripArray(new int[] { 0, 4, 16 }, format);
RoundTripArray(new ulong[] { 0, 4, 16 }, format);
RoundTripArray(new long[] { 0, 4, 16 }, format);
RoundTripArray(new float[] { 0.0f, 100.5f, -2.05f }, format);
RoundTripArray(new double[] { 0.0f, 100.5f, -2.05f }, format);
// Verify exception on (expected) unsupported type
Assert.Throws <NotSupportedException>(() => RoundTripArray(new decimal[] { 0.01M, 0.02M }, format));
// Null/Empty array handling (currently expected to come back as empty array)
RoundTripArray <byte>(null, format);
RoundTripArray <byte>(new byte[] { }, format);
// Test double Dispose handled correctly, 'Verbose == true' works, 'LeaveStreamOpen' respected
container.AssertEqual(RoundTrip(container, format, testDoubleDispose: true));
container.AssertEqual(RoundTrip(container, format, new TreeSerializationSettings()
{
LeaveStreamOpen = true
}));
container.AssertEqual(RoundTrip(container, format, new TreeSerializationSettings()
{
Verbose = true
}));
// Test null string handling
sample.Name = null;
sample.AssertEqual(RoundTrip(sample, format));
// Test settings defaulting
sample.AssertEqual(RoundTrip_NullSettings(sample, format));
// Test Skip behavior works for each primitive value
VerifySkip(sample, format);
// Test serialization details
using (MemoryStream stream = new MemoryStream())
{
TreeSerializationSettings settings = new TreeSerializationSettings()
{
LeaveStreamOpen = true
};
using (ITreeWriter writer = Writer(format, stream, settings))
{
sample.Write(writer);
}
long bytesWritten = stream.Position;
stream.Seek(0, SeekOrigin.Begin);
using (ITreeReader reader = Reader(format, stream, settings))
{
// Test 'Expect' throwing (should not be 'None' when file just opened)
Assert.NotEqual(TreeToken.None, reader.TokenType);
Assert.Throws <IOException>(() => reader.Expect(TreeToken.None));
// Test reading back as wrong type (exception from ReadObject unexpected property name)
Assert.Throws <IOException>(() => new SingleContainer <Sample>().Read(reader));
}
}
}
// RoundTrip with all verification
public static T RoundTrip <T>(
T value,
Func <T> buildT,
TreeFormat format,
TreeSerializationSettings settings = null,
bool testDoubleDispose = false) where T : ITreeSerializable
{
T roundTripped = buildT();
// Request non-compact stream (debuggability)
settings ??= new TreeSerializationSettings()
{
Verbose = true
};
byte[] buffer = null;
using (MemoryStream stream = new MemoryStream())
{
using (ITreeWriter writer = Writer(format, stream, settings))
{
value.Write(writer);
// Debuggability: To see serialized text
//string serializedText = StreamString(stream);
if (testDoubleDispose)
{
writer.Dispose();
}
}
if (!settings.LeaveStreamOpen)
{
// Verify stream disposed
if (!Debugger.IsAttached)
{
Assert.Throws <ObjectDisposedException>(() => stream.Position);
}
}
else
{
// Verify stream left open if requested
long verifyStreamNotDisposed = stream.Position;
}
// Get bytes to read back from with reader
buffer = stream.ToArray();
}
using (MemoryStream stream = new MemoryStream(buffer))
{
using (ITreeReader reader = Reader(format, stream, settings))
{
// Ensure Readers pre-read first token by default
// Needed to allow single value reading to work without everything having to handle this case everywhere
Assert.NotEqual(TreeToken.None, reader.TokenType);
roundTripped.Read(reader);
// Verify everything read back
Assert.Equal(buffer.Length, stream.Position);
if (testDoubleDispose)
{
reader.Dispose();
}
}
if (!settings.LeaveStreamOpen)
{
// Verify stream disposed
if (!Debugger.IsAttached)
{
Assert.Throws <ObjectDisposedException>(() => stream.Position);
}
}
else
{
// Verify stream left open if requested
long verifyStreamNotDisposed = stream.Position;
}
}
return(roundTripped);
}
