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JSON formatting for FieldMask

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This commit is contained in:
Jon Skeet 2015-08-03 11:43:07 +01:00
parent db9f47a3ed
commit 0e30de3d6b
2 changed files with 39 additions and 1 deletions
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18
csharp/src/Google.Protobuf.Test/JsonFormatterTest.cs
View File

@ -388,6 +388,24 @@ namespace Google.Protobuf
AssertJson("{ 'a': null, 'b': false, 'c': 10.5, 'd': 'text', 'e': [ 't1', 5 ], 'f': { 'nested': 'value' } }", message.ToString());
}
[Test]
public void FieldMaskStandalone()
{
var fieldMask = new FieldMask { Paths = { "", "single", "with_underscore", "nested.field.name", "nested..double_dot" } };
Assert.AreEqual(",single,withUnderscore,nested.field.name,nested..doubleDot", fieldMask.ToString());
// Invalid, but we shouldn't create broken JSON...
fieldMask = new FieldMask { Paths = { "x\\y" } };
Assert.AreEqual(@"x\\y", fieldMask.ToString());
}
[Test]
public void FieldMaskField()
{
var message = new TestWellKnownTypes { FieldMaskField = new FieldMask { Paths = { "user.display_name", "photo" } } };
AssertJson("{ 'fieldMaskField': 'user.displayName,photo' }", JsonFormatter.Default.Format(message));
}
/// <summary>
/// Checks that the actual JSON is the same as the expected JSON - but after replacing
/// all apostrophes in the expected JSON with double quotes. This basically makes the tests easier

22
csharp/src/Google.Protobuf/JsonFormatter.cs
View File

@ -36,6 +36,7 @@ using System.Globalization;
using System.Text;
using Google.Protobuf.Reflection;
using Google.Protobuf.WellKnownTypes;
using System.Linq;
namespace Google.Protobuf
{
@ -402,6 +403,11 @@ namespace Google.Protobuf
MaybeWrapInString(builder, value, WriteDuration, inField);
return;
}
if (descriptor.FullName == FieldMask.Descriptor.FullName)
{
MaybeWrapInString(builder, value, WriteFieldMask, inField);
return;
}
if (descriptor.FullName == Struct.Descriptor.FullName)
{
WriteStruct(builder, (IMessage) value);
@ -479,6 +485,12 @@ namespace Google.Protobuf
builder.Append('s');
}
private void WriteFieldMask(StringBuilder builder, IMessage value)
{
IList paths = (IList) value.Descriptor.Fields[FieldMask.PathsFieldNumber].Accessor.GetValue(value);
AppendEscapedString(builder, string.Join(",", paths.Cast<string>().Select(ToCamelCase)));
}
/// <summary>
/// Appends a number of nanoseconds to a StringBuilder. Either 0 digits are added (in which
/// case no "." is appended), or 3 6 or 9 digits.
@ -654,6 +666,15 @@ namespace Google.Protobuf
private void WriteString(StringBuilder builder, string text)
{
builder.Append('"');
AppendEscapedString(builder, text);
builder.Append('"');
}
/// <summary>
/// Appends the given text to the string builder, escaping as required.
/// </summary>
private void AppendEscapedString(StringBuilder builder, string text)
{
for (int i = 0; i < text.Length; i++)
{
char c = text[i];
@ -713,7 +734,6 @@ namespace Google.Protobuf
break;
}
}
builder.Append('"');
}
private const string Hex = "0123456789abcdef";