/// <summary>
/// Marshals JSON string into VW example.
/// </summary>
public void Marshal(VowpalWabbitMarshalContext ctx, Namespace ns, Feature feature)
{
if (this.value == null)
{
return;
}
var jsonSerializer = new JsonSerializer();
using (var jsonBuilder = new VowpalWabbitJsonBuilder(ctx.VW, VowpalWabbitDefaultMarshaller.Instance, jsonSerializer))
{
// serialize from object to JSON
var sb = new StringBuilder();
using (var writer = new JsonTextWriter(new StringWriter(sb)))
{
this.jsonConverter.WriteJson(writer, this.value, jsonSerializer);
}
// marshal from JSON to VW
using (var reader = new JsonTextReader(new StringReader(sb.ToString())))
{
jsonBuilder.Parse(reader, ctx, new Namespace(ctx.VW, feature.Name));
}
}
}
/// <summary>
/// Marshals JSON string into VW example.
/// </summary>
public void Marshal(VowpalWabbitMarshalContext ctx, Namespace ns, Feature feature)
{
if (this.value == null)
{
return;
}
try
{
var jsonSerializer = new JsonSerializer();
using (var jsonBuilder = new VowpalWabbitJsonBuilder(ctx.VW, VowpalWabbitDefaultMarshaller.Instance, jsonSerializer))
{
// marshal from JSON to VW
foreach (var json in jsonConverter.JsonFragments(this.value))
{
if (json == null)
{
continue;
}
using (var reader = new JsonTextReader(new StringReader(json)))
{
jsonBuilder.Parse(reader, ctx, new Namespace(ctx.VW, feature.Name));
}
}
}
}
catch (Exception e)
{
throw new VowpalWabbitSerializationException("Optimized marshalling failed", e, ns, feature);
}
}
private bool HandleMultiProperty(VowpalWabbitJsonParseState state, string property)
{
var multiPropertyName = this.vwPool.Native.Settings.PropertyConfiguration.MultiProperty;
if (!property.Equals(multiPropertyName, StringComparison.OrdinalIgnoreCase))
{
return(false);
}
var reader = state.Reader;
if (!reader.Read() || reader.TokenType != JsonToken.StartArray)
{
throw new VowpalWabbitJsonException(reader, "Expected start array for '" + multiPropertyName + "'");
}
if (this.ExampleBuilders == null)
{
this.ExampleBuilders = new List <VowpalWabbitJsonBuilder>();
}
state.MultiIndex = 0;
while (reader.Read())
{
switch (reader.TokenType)
{
case JsonToken.StartObject:
VowpalWabbitJsonBuilder builder = null;
try
{
builder = new VowpalWabbitJsonBuilder(this, this.vwPool, VowpalWabbitDefaultMarshaller.Instance, this.jsonSerializer, state.MultiIndex);
this.ExampleBuilders.Add(builder);
}
catch (Exception)
{
builder.Dispose();
throw;
}
// pass the label to the selected example
builder.Parse(reader, index != null && index == this.ExampleBuilders.Count - 1 ? label : null, this.extensions);
state.MultiIndex++;
break;
case JsonToken.EndArray:
return(true);
default:
throw new VowpalWabbitJsonException(reader, "Unexpected token: " + reader.TokenType);
}
}
throw new VowpalWabbitJsonException(reader, "Unexpected end");
}
/// <summary>
/// Parses the example.
/// </summary>
/// <param name="reader">The example to parse.</param>
/// <param name="label">
/// Optional label, taking precedence over "_label" property found in <paramref name="reader"/>.
/// If null, <paramref name="reader"/> will be inspected and the "_label" property used as label.
/// </param>
/// <param name="index">Optional index of example the given label should be applied for multi-line examples.</param>
public void Parse(JsonReader reader, ILabel label = null, int?index = null)
{
var multiPropertyName = this.vwPool.Native.Settings.PropertyConfiguration.MultiProperty;
// only pass the label if it's not targeted at a particular index
this.ExampleBuilder.Parse(reader, index == null ? label : null,
propertyName =>
{
if (propertyName != multiPropertyName)
{
return(false);
}
if (!reader.Read() || reader.TokenType != JsonToken.StartArray)
{
throw new VowpalWabbitJsonException(reader.Path, "Expected start array for '" + multiPropertyName + "'");
}
if (this.ExampleBuilders == null)
{
this.ExampleBuilders = new List <VowpalWabbitJsonBuilder>();
}
while (reader.Read())
{
switch (reader.TokenType)
{
case JsonToken.StartObject:
VowpalWabbitJsonBuilder builder = null;
try
{
builder = new VowpalWabbitJsonBuilder(this.vwPool, this.defaultMarshaller, this.jsonSerializer);
this.ExampleBuilders.Add(builder);
}
catch (Exception)
{
builder.Dispose();
throw;
}
// pass the label to the selected example
builder.Parse(reader, index != null && index == this.ExampleBuilders.Count - 1 ? label : null);
break;
case JsonToken.EndArray:
return(true);
default:
throw new VowpalWabbitJsonException(reader.Path, "Unexpected token: " + reader.TokenType);
}
}
throw new VowpalWabbitJsonException(reader.Path, "Unexpected end");
});
}
public void Marshal(VowpalWabbitMarshalContext ctx, Namespace ns, Feature feature)
{
var jsonSerializer = new JsonSerializer();
using (var jsonBuilder = new VowpalWabbitJsonBuilder(ctx.VW, VowpalWabbitDefaultMarshaller.Instance, jsonSerializer))
{
// serialize from object to JSON
var sb = new StringBuilder();
using (var writer = new JsonTextWriter(new StringWriter(sb)))
{
this.jsonConverter.WriteJson(writer, this.value, jsonSerializer);
}
// marshal from JSON to VW
using (var reader = new JsonTextReader(new StringReader(sb.ToString())))
{
jsonBuilder.Parse(reader, ctx, new Namespace(ctx.VW, feature.Name));
}
}
}
private bool HandleMultiProperty(VowpalWabbitJsonParseState state, string property)
{
var multiPropertyName = this.vwPool.Native.Settings.PropertyConfiguration.MultiProperty;
if (!property.Equals(multiPropertyName, StringComparison.OrdinalIgnoreCase))
return false;
var reader = state.Reader;
if (!reader.Read() || reader.TokenType != JsonToken.StartArray)
throw new VowpalWabbitJsonException(reader, "Expected start array for '" + multiPropertyName + "'");
if (this.ExampleBuilders == null)
this.ExampleBuilders = new List<VowpalWabbitJsonBuilder>();
while (reader.Read())
{
switch (reader.TokenType)
{
case JsonToken.StartObject:
VowpalWabbitJsonBuilder builder = null;
try
{
builder = new VowpalWabbitJsonBuilder(this, this.vwPool, VowpalWabbitDefaultMarshaller.Instance, this.jsonSerializer);
this.ExampleBuilders.Add(builder);
}
catch (Exception)
{
builder.Dispose();
throw;
}
// pass the label to the selected example
builder.Parse(reader, index != null && index == this.ExampleBuilders.Count - 1 ? label : null, this.extensions);
break;
case JsonToken.EndArray:
return true;
default:
throw new VowpalWabbitJsonException(reader, "Unexpected token: " + reader.TokenType);
}
}
throw new VowpalWabbitJsonException(reader, "Unexpected end");
}
/// <summary>
/// Parses the example.
/// </summary>
/// <param name="reader">The example to parse.</param>
/// <param name="label">
/// Optional label, taking precedence over "_label" property found in <paramref name="reader"/>.
/// If null, <paramref name="reader"/> will be inspected and the "_label" property used as label.
/// </param>
/// <param name="index">Optional index of example the given label should be applied for multi-line examples.</param>
public void Parse(JsonReader reader, ILabel label = null, int? index = null)
{
// only pass the label if it's not targeted at a particular index
this.ExampleBuilder.Parse(reader, index == null ? label : null,
propertyName =>
{
if (propertyName != "_multi")
return false;
if (!reader.Read() || reader.TokenType != JsonToken.StartArray)
throw new VowpalWabbitJsonException(reader.Path, "Expected start array for _multi");
if (this.ExampleBuilders == null)
this.ExampleBuilders = new List<VowpalWabbitJsonBuilder>();
while (reader.Read())
{
switch (reader.TokenType)
{
case JsonToken.StartObject:
VowpalWabbitJsonBuilder builder = null;
try
{
builder = new VowpalWabbitJsonBuilder(this.vw, this.defaultMarshaller, this.jsonSerializer);
this.ExampleBuilders.Add(builder);
}
catch (Exception)
{
builder.Dispose();
throw;
}
// pass the label to the selected example
builder.Parse(reader, index != null && index == this.ExampleBuilders.Count - 1 ? label : null);
break;
case JsonToken.EndArray:
return true;
default:
throw new VowpalWabbitJsonException(reader.Path, "Unexpected token: " + reader.TokenType);
}
}
throw new VowpalWabbitJsonException(reader.Path, "Unexpected end");
});
}
/// <summary>
/// Parses the example.
/// </summary>
/// <param name="reader">The example to parse.</param>
/// <param name="label">
/// Optional label, taking precedence over "_label" property found in <paramref name="reader"/>.
/// If null, <paramref name="reader"/> will be inspected and the "_label" property used as label.
/// </param>
/// <param name="index">Optional index of example the given label should be applied for multi-line examples.</param>
public void Parse(JsonReader reader, ILabel label = null, int? index = null)
{
var multiPropertyName = this.vwPool.Native.Settings.PropertyConfiguration.MultiProperty;
// only pass the label if it's not targeted at a particular index
this.ExampleBuilder.Parse(reader, index == null ? label : null,
propertyName =>
{
if (propertyName != multiPropertyName)
return false;
if (!reader.Read() || reader.TokenType != JsonToken.StartArray)
throw new VowpalWabbitJsonException(reader, "Expected start array for '" + multiPropertyName + "'");
if (this.ExampleBuilders == null)
this.ExampleBuilders = new List<VowpalWabbitJsonBuilder>();
while (reader.Read())
{
switch (reader.TokenType)
{
case JsonToken.StartObject:
VowpalWabbitJsonBuilder builder = null;
try
{
builder = new VowpalWabbitJsonBuilder(this, this.vwPool, this.defaultMarshaller, this.jsonSerializer);
this.ExampleBuilders.Add(builder);
}
catch (Exception)
{
builder.Dispose();
throw;
}
// pass the label to the selected example
builder.Parse(reader, index != null && index == this.ExampleBuilders.Count - 1 ? label : null);
break;
case JsonToken.EndArray:
return true;
default:
throw new VowpalWabbitJsonException(reader, "Unexpected token: " + reader.TokenType);
}
}
throw new VowpalWabbitJsonException(reader, "Unexpected end");
});
// check if the outer example foudn a label
if (this.ExampleBuilder.Label != null)
{
VowpalWabbitDefaultMarshaller.Instance.MarshalLabel(
this.ExampleBuilders[this.ExampleBuilder.LabelIndex].DefaultNamespaceContext,
this.ExampleBuilder.Label);
}
}