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Schema Inferrence Errors are Detailed for Invalid Parquet Files #298

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Merged
YemreGurses merged 1 commit into from
Apr 15, 2026
Merged

Schema Inferrence Errors are Detailed for Invalid Parquet Files #298

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9 changes: 7 additions & 2 deletions tofhir-server/src/main/scala/io/tofhir/server/service/SchemaDefinitionService.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -130,8 +130,13 @@ class SchemaDefinitionService(schemaRepository: ISchemaRepository, mappingReposi
.limit(1) // It is enough to take the first row to infer the schema.
} catch {
case e: FhirMappingException =>
// Remove the new lines and capitalize the error detail to show it in front-end properly.
throw BadRequest(e.getMessage, e.getCause.toString.capitalize.replace("\n", " "))
val simplifiedCause = Option(e.getCause).map(_.getMessage).map(_.replace("\n", " ")).getOrElse("")
val detail =
if (simplifiedCause.toLowerCase.contains("parquet") && simplifiedCause.toLowerCase.contains("not a parquet file"))
"Content type mismatch: the input file is not a valid Parquet file."
else
simplifiedCause.capitalize
throw BadRequest(e.getMessage, detail)
}
dataFrame.schema // Get the schema inferred by Spark
}
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