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Allow the original field name (rather than camel-cased) when parsing JSON

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This commit is contained in:
Jon Skeet 2016-01-15 11:39:54 +00:00
parent 1fc485928f
commit 022a9b2675
2 changed files with 23 additions and 3 deletions
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8
csharp/src/Google.Protobuf.Test/JsonParserTest.cs
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@ -71,6 +71,14 @@ namespace Google.Protobuf
Assert.Throws<InvalidProtocolBufferException>(() => JsonParser.Default.Parse<TestMap>(json));
}
[Test]
public void OriginalFieldNameAccepted()
{
var json = "{ \"single_int32\": 10 }";
var expected = new TestAllTypes { SingleInt32 = 10 };
Assert.AreEqual(expected, TestAllTypes.Parser.ParseJson(json));
}
[Test]
public void SourceContextRoundtrip()
{

18
csharp/src/Google.Protobuf/Reflection/MessageDescriptor.cs
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@ -92,11 +92,22 @@ namespace Google.Protobuf.Reflection
new FieldDescriptor(field, file, this, index, generatedCodeInfo?.PropertyNames[index]));
fieldsInNumberOrder = new ReadOnlyCollection<FieldDescriptor>(fieldsInDeclarationOrder.OrderBy(field => field.FieldNumber).ToArray());
// TODO: Use field => field.Proto.JsonName when we're confident it's appropriate. (And then use it in the formatter, too.)
jsonFieldMap = new ReadOnlyDictionary<string, FieldDescriptor>(fieldsInNumberOrder.ToDictionary(field => JsonFormatter.ToCamelCase(field.Name)));
jsonFieldMap = CreateJsonFieldMap(fieldsInNumberOrder);
file.DescriptorPool.AddSymbol(this);
Fields = new FieldCollection(this);
}
private static ReadOnlyDictionary<string, FieldDescriptor> CreateJsonFieldMap(IList<FieldDescriptor> fields)
{
var map = new Dictionary<string, FieldDescriptor>();
foreach (var field in fields)
{
map[JsonFormatter.ToCamelCase(field.Name)] = field;
map[field.Name] = field;
}
return new ReadOnlyDictionary<string, FieldDescriptor>(map);
}
/// <summary>
/// The brief name of the descriptor's target.
/// </summary>
@ -255,9 +266,10 @@ namespace Google.Protobuf.Reflection
// TODO: consider making this public in the future. (Being conservative for now...)
/// <value>
/// Returns a read-only dictionary mapping the field names in this message as they're used
/// Returns a read-only dictionary mapping the field names in this message as they're available
/// in the JSON representation to the field descriptors. For example, a field <c>foo_bar</c>
/// in the message would result in an entry with a key <c>fooBar</c>.
/// in the message would result two entries, one with a key <c>fooBar</c> and one with a key
/// <c>foo_bar</c>, both referring to the same field.
/// </value>
internal IDictionary<string, FieldDescriptor> ByJsonName() => messageDescriptor.jsonFieldMap;