Fix transformer handling of boolean schemas in JsonSchemaExporter. #109954
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eiriktsarpalis
requested review from
stephentoub,
PranavSenthilnathan and
jozkee
src/libraries/System.Text.Json/src/System/Text/Json/Schema/JsonSchema.cs
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| public static JsonSchema False { get; } = new(false); | ||
| public static JsonSchema True { get; } = new(true); | ||
| public static JsonSchema CreateFalseSchema() => new(false); | ||
| public static JsonSchema CreateTrueSchema() => new(true); |
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And we don't just want to use new(true) at call sites?
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The constructor accepting boolean is marked private since boolean schemas are special and do not admit keywords. It's better if the false and true schemas are created explicitly. If I were to redesign this type today, I would have made booleans and objects separate subclasses -- the current arrangement has been the source of most bugs we've seen in JsonSchemaExporter.
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The constructor accepting boolean is marked private since boolean schemas are special and do not admit keywords.
But aren't these factories now 100% equivalent to the constructor? If it's ok for these factories to exist, I don't understand why the constructor is any more problematic.
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I don't think JsonSchema schema = new(false); adequately conveys that a false schema is being created. I would rather assign a distinct factory for that case.
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/backport to release/9.0-staging |
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Started backporting to release/9.0-staging: https://github.com/dotnet/runtime/actions/runs/11920223361 |
…otnet#109954) * Fix transformer handling of boolean schemas in JsonSchemaExporter. * Address feedback.
The
JsonSchemaExporterimplementation uses singletons to represent boolean schema nodes, however this approach does not account for the possibility of a transformer context registering itself to the singleton. Should be backported to 9.Fix #109868.