iemejia commented on a change in pull request #10974: [BEAM-9384] Add 
SchemaRegistry.getSchemaCoder to get SchemaCoders for registered types
URL: https://github.com/apache/beam/pull/10974#discussion_r386080476
 
 

 ##########
 File path: 
sdks/java/core/src/main/java/org/apache/beam/sdk/schemas/SchemaRegistry.java
 ##########
 @@ -288,6 +281,38 @@ public void registerSchemaProvider(SchemaProvider 
schemaProvider) {
     return getProviderResult((SchemaProvider p) -> 
p.fromRowFunction(typeDescriptor));
   }
 
+  /**
+   * Retrieve a {@link SchemaCoder} for a given {@link Class} type. If no 
schema exists, throws
+   * {@link * NoSuchSchemaException}.
+   */
+  public <T> SchemaCoder<T> getSchemaCoder(Class<T> clazz) throws 
NoSuchSchemaException {
+    return getSchemaCoder(TypeDescriptor.of(clazz));
+  }
+
+  /**
+   * Retrieve a {@link SchemaCoder} for a given {@link TypeDescriptor} type. 
If no schema exists,
+   * throws {@link * NoSuchSchemaException}.
+   */
+  public <T> SchemaCoder<T> getSchemaCoder(TypeDescriptor<T> typeDescriptor)
+      throws NoSuchSchemaException {
+    return SchemaCoder.of(
+        getSchema(typeDescriptor),
+        typeDescriptor,
+        getToRowFunction(typeDescriptor),
+        getFromRowFunction(typeDescriptor));
 
 Review comment:
   Interesting. I have not thought about making KafkaRecord 'schema' like good 
point. There are some consequences on that that are still not clear to me (like 
how will we deal with the runtime resolution part of Schemas for KV that we do 
now with the Confluent Schema Registry support. I am going to give it a try and 
ping you once I have something in the other PR #10978. Let's continue that 
discussion there. 

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