/// <summary>
/// Writes the next value from the given <see cref="JsonReader"/>
/// into this writer's output. If the reader is positioned
/// at the root of JSON data, then the entire data will be
/// written.
/// </summary>
public virtual void WriteFromReader(JsonReader reader)
{
if (reader == null)
{
throw new ArgumentNullException("reader");
}
if (!reader.MoveToContent())
{
return;
}
if (reader.TokenClass == JsonTokenClass.String)
{
WriteString(reader.Text);
}
else if (reader.TokenClass == JsonTokenClass.Number)
{
WriteNumber(reader.Text);
}
else if (reader.TokenClass == JsonTokenClass.Boolean)
{
WriteBoolean(reader.Text == JsonBoolean.TrueText);
}
else if (reader.TokenClass == JsonTokenClass.Null)
{
WriteNull();
}
else if (reader.TokenClass == JsonTokenClass.Array)
{
WriteStartArray();
reader.Read();
while (reader.TokenClass != JsonTokenClass.EndArray)
{
WriteFromReader(reader);
}
WriteEndArray();
}
else if (reader.TokenClass == JsonTokenClass.Object)
{
reader.Read();
WriteStartObject();
while (reader.TokenClass != JsonTokenClass.EndObject)
{
WriteMember(reader.ReadMember());
WriteFromReader(reader);
}
WriteEndObject();
}
else
{
throw new JsonException(string.Format("{0} not expected.", reader.TokenClass));
}
reader.Read();
}
public void CannotInitializeWithReaderOnArray()
{
JsonReader reader = JsonText.CreateReader("[]");
reader.MoveToContent();
new FreeJsonMemberReadingHelper(reader);
}
public void InitializeWithReaderOnObjectStart()
{
JsonReader reader = JsonText.CreateReader("{}");
reader.MoveToContent();
new FreeJsonMemberReadingHelper(reader);
}
public void MissingObjectMemberNameValueDelimiter()
{
JsonReader reader = CreateReader("{x 1}");
reader.MoveToContent();
reader.StepOut();
}
public void UnterminatedArray()
{
JsonReader reader = CreateReader("[1,2");
reader.MoveToContent();
reader.StepOut();
}
public void MissingObjectMember()
{
JsonReader reader = CreateReader("{x:1,/*y:2*/,z:3}");
reader.MoveToContent();
reader.StepOut();
}
public void UnterminatedObject()
{
JsonReader reader = CreateReader("{x:1,y:2");
reader.MoveToContent();
reader.StepOut();
}
public void InitializeWithReaderOnMember()
{
JsonReader reader = JsonText.CreateReader("{foo:bar}");
reader.MoveToContent();
reader.ReadToken(JsonTokenClass.Object);
new FreeJsonMemberReadingHelper(reader);
}
public void NullMemberNameHarmless()
{
JsonReader reader = CreateReader("{null:null}");
reader.MoveToContent();
reader.ReadToken(JsonTokenClass.Object);
Assert.AreEqual("null", reader.ReadMember());
reader.ReadNull();
Assert.AreSame(JsonTokenClass.EndObject, reader.TokenClass);
Assert.IsFalse(reader.Read());
}
public static JsonBuffer From(JsonReader reader)
{
if (reader == null)
{
throw new ArgumentNullException("reader");
}
JsonBufferReader bufferReader = reader as JsonBufferReader;
if (bufferReader != null)
{
return(bufferReader.BufferValue());
}
if (!reader.MoveToContent())
{
return(Empty);
}
if (reader.TokenClass == JsonTokenClass.Member)
{
reader.Read();
}
bool structured = reader.TokenClass == JsonTokenClass.Array ||
reader.TokenClass == JsonTokenClass.Object;
JsonBufferWriter writer = new JsonBufferWriter();
writer.MaxDepth = reader.MaxDepth;
writer.WriteFromReader(reader);
JsonBuffer buffer = writer.GetBuffer();
if (!structured)
{
bufferReader = buffer.CreateReader();
bufferReader.MoveToContent();
bufferReader.Read();
buffer = bufferReader.BufferValue();
}
return(buffer);
}
private static object ReadParameters(Method method, JsonReader reader, ImportContext importContext)
{
Debug.Assert(method != null);
Debug.Assert(reader != null);
Debug.Assert(importContext != null);
reader.MoveToContent();
Parameter[] parameters = method.GetParameters();
if (reader.TokenClass == JsonTokenClass.Array)
{
reader.Read();
ArrayList argList = new ArrayList(parameters.Length);
// TODO: This loop could bomb when more args are supplied that parameters available.
for (int i = 0; i < parameters.Length && reader.TokenClass != JsonTokenClass.EndArray; i++)
argList.Add(importContext.Import(parameters[i].ParameterType, reader));
reader.StepOut();
return argList.ToArray();
}
else if (reader.TokenClass == JsonTokenClass.Object)
{
reader.Read();
JsonObject argByName = new JsonObject();
while (reader.TokenClass != JsonTokenClass.EndObject)
{
// TODO: Imporve this lookup.
// FIXME: Does not work when argument is positional.
Type parameterType = AnyType.Value;
string name = reader.ReadMember();
foreach (Parameter parameter in parameters)
{
if (parameter.Name.Equals(name))
{
parameterType = parameter.ParameterType;
break;
}
}
argByName.Put(name, importContext.Import(parameterType, reader));
}
reader.Read();
return argByName;
}
else
{
return importContext.Import(reader);
}
}
public static JsonBuffer From(JsonReader reader)
{
if (reader == null)
throw new ArgumentNullException("reader");
JsonBufferReader bufferReader = reader as JsonBufferReader;
if (bufferReader != null)
return bufferReader.BufferValue();
if (!reader.MoveToContent())
return Empty;
if (reader.TokenClass == JsonTokenClass.Member)
reader.Read();
bool structured = reader.TokenClass == JsonTokenClass.Array
|| reader.TokenClass == JsonTokenClass.Object;
JsonBufferWriter writer = new JsonBufferWriter();
writer.WriteFromReader(reader);
JsonBuffer buffer = writer.GetBuffer();
if (!structured)
{
bufferReader = buffer.CreateReader();
bufferReader.MoveToContent();
bufferReader.Read();
buffer = bufferReader.BufferValue();
}
return buffer;
}
/// <summary>
/// Writes the next value from the given <see cref="JsonReader"/>
/// into this writer's output. If the reader is positioned
/// at the root of JSON data, then the entire data will be
/// written.
/// </summary>
public virtual void WriteFromReader(JsonReader reader)
{
if (reader == null)
throw new ArgumentNullException("reader");
if (!reader.MoveToContent())
return;
if (reader.TokenClass == JsonTokenClass.String)
{
WriteString(reader.Text);
}
else if (reader.TokenClass == JsonTokenClass.Number)
{
WriteNumber(reader.Text);
}
else if (reader.TokenClass == JsonTokenClass.Boolean)
{
WriteBoolean(reader.Text == JsonBoolean.TrueText);
}
else if (reader.TokenClass == JsonTokenClass.Null)
{
WriteNull();
}
else if (reader.TokenClass == JsonTokenClass.Array)
{
WriteStartArray();
reader.Read();
while (reader.TokenClass != JsonTokenClass.EndArray)
WriteFromReader(reader);
WriteEndArray();
}
else if (reader.TokenClass == JsonTokenClass.Object)
{
reader.Read();
WriteStartObject();
while (reader.TokenClass != JsonTokenClass.EndObject)
{
WriteMember(reader.ReadMember());
WriteFromReader(reader);
}
WriteEndObject();
}
else
{
throw new JsonException(string.Format("{0} not expected.", reader.TokenClass));
}
reader.Read();
}
void IJsonImportable.Import(ImportContext context, JsonReader reader)
{
reader.MoveToContent();
if (reader.TokenClass != JsonTokenClass.Object)
{
reader.Skip();
return;
}
reader.Read(/* object */);
do
{
var brushName = reader.ReadMember().ToLowerInvariant();
var color = reader.ReadString();
var foreground = EnumHelper.TryParse<ConsoleColor>(color, true) ?? DefaultBrush.Foreground;
switch (brushName)
{
case "arr":
case "array":
Array = Array.ResetForeground(foreground);
break;
case "obj":
case "object":
Object = Object.ResetForeground(foreground);
break;
case "mem":
case "member":
Member = Member.ResetForeground(foreground);
break;
case "str":
case "string":
String = String.ResetForeground(foreground);
break;
case "num":
case "number":
Number = Number.ResetForeground(foreground);
break;
case "bit":
case "boolean":
Boolean = Boolean.ResetForeground(foreground);
break;
case "nil":
case "null":
Null = Null.ResetForeground(foreground);
break;
default:
continue;
}
}
while (reader.TokenClass != JsonTokenClass.EndObject);
reader.Read( /* end object */);
}
public void WriteValueFromReader(JsonReader reader)
{
if (reader == null)
throw new ArgumentNullException("reader");
if (!reader.MoveToContent())
return;
switch (reader.Token)
{
case JsonToken.String: WriteString(reader.Text); break;
case JsonToken.Number: WriteNumber(reader.Text); break;
case JsonToken.Boolean : WriteBoolean(reader.Text == JsonReader.FalseText); break;
case JsonToken.Null : WriteNull(); break;
case JsonToken.Object :
{
WriteStartObject();
reader.ReadMember();
do
{
WriteMember(reader.Text);
reader.Read();
WriteValueFromReader(reader);
}
while (reader.Token != JsonToken.EndObject);
WriteEndObject();
break;
}
case JsonToken.Array :
{
WriteStartArray();
reader.Read();
while (reader.Token != JsonToken.EndArray)
WriteValueFromReader(reader);
WriteEndArray();
break;
}
default : throw new JsonException(string.Format("{0} not expected.", reader.Token));
}
reader.Read();
}
/// <summary>
/// Attempts to locate a member with a given (case-sensitive) name
/// and returns a <see cref="JsonReader"/> that can be used to read
/// the value. Otherwise it returns <c>null</c>.
/// </summary>
/// <remarks>
/// The caller should not use the returned <see cref="JsonReader"/>
/// instance for any other purpose but reading the value. It is
/// possible that this method will return the same instance as
/// <see cref="BaseReader"/> or a separate instance.
/// </remarks>
public JsonReader TryReadMember(string name)
{
//
// Is the member already buffered? If yes then return a reader
// on its buffered value.
//
JsonBuffer value = TryPopBufferedMember(name);
if (!value.IsEmpty)
{
return(value.CreateReader());
}
//
// Use the base reader from here on if it has not already been
// exhausted...
//
if (_ended)
{
return(null);
}
JsonReader reader = BaseReader;
if (!_started)
{
_started = true;
if (!reader.MoveToContent())
{
throw new JsonException(string.Format(
@"Unexpected EOF while attempting to look for member named '{0}'.",
name));
}
JsonTokenClass clazz = reader.TokenClass;
if (clazz != JsonTokenClass.Object &&
clazz != JsonTokenClass.Member)
{
throw new JsonException(string.Format(
@"Found {0} where a JSON Object or Member was expected.", clazz));
}
}
//
// If the base reader is sitting on the start of an object then
// move into it. This case should only arise on the first read
// into a JSON object.
//
if (reader.TokenClass == JsonTokenClass.Object)
{
reader.Read();
}
//
// Go over the entire JSON object until its end.
//
while (reader.TokenClass != JsonTokenClass.EndObject)
{
//
// Read the next member and if it matches what's being
// sought then simply return the base reader that
// should be aligned on the value.
//
string actualName = reader.ReadMember();
if (string.CompareOrdinal(actualName, name) == 0)
{
return(reader);
}
//
// Not the sought member so buffer it to be served
// later when it is sought or as part of the tail.
//
NamedJsonBufferList members = _members;
if (members == null)
{
members = _members = new NamedJsonBufferList(4);
}
members.Add(new NamedJsonBuffer(actualName, JsonBuffer.From(reader)));
}
_ended = true;
//
// Member not found.
//
return(null);
}
