martin-g commented on issue #476:
URL: https://github.com/apache/avro-rs/issues/476#issuecomment-3943071557

   Here are some IT tests in the Java SDK which also use the flatten layout:
   * 
https://github.com/apache/avro/blob/999b36feadf76ff9eb7535a66a00dbffba8b0b75/lang/java/integration-test/codegen-test/src/test/resources/avro/nested_logical_types_union_fixed.avsc
   * 
https://github.com/apache/avro/blob/999b36feadf76ff9eb7535a66a00dbffba8b0b75/lang/java/integration-test/codegen-test/src/test/resources/avro/custom_conversion_logical_types_enum.avsc
   
   
   Here is a simple Java app that confirms that it supports the flatten way:
   1. pom.xml
   ```xml
   <dependency>
      <groupId>org.apache.avro</groupId>
      <artifactId>avro</artifactId>
      <version>1.12.1</version>
   </dependency>
   ```
   
   2. Java
   ```java
   import org.apache.avro.Schema;
   import org.apache.avro.SchemaParser;
   
   public class App {
   
     public static final String SCHEMA = """
       {
         "namespace": "org.apache.avro.codegentest.testdata",
         "name": "customEnum",
         "type": "enum",
         "logicalType": "custom-enum",
         "symbols": ["ONE", "TWO", "THREE"]
       }
       """;
   
     void main(String[] args) {
       Schema schema = new SchemaParser()
         .parse(SCHEMA)
         .mainSchema();
       System.out.println(schema);
     }
   }
   ```
   
   3. Output
   ```
   
{"type":"enum","name":"customEnum","namespace":"org.apache.avro.codegentest.testdata","symbols":["ONE","TWO","THREE"],"logicalType":"custom-enum"}
   ```
   
   I cannot tell what avro-tools.jar does differently than SchemaParser.


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