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https://issues.apache.org/jira/browse/AVRO-3890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17778960#comment-17778960
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Oscar Westra van Holthe - Kind commented on AVRO-3890:
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A better solution is to define what makes a schema a "main" schema. Is that
truly only how it's read? Or does it (also) relate to composition?
Based on composition, these are all possibilities to define a "main" schema:
* The outermost schema in a {{.avsc}} file -- this is the most common
definition
(this option does not apply to you, as you're using IDL)
* The first schema defined in a protocol
* All (named) schemata that are not referenced
* All (named) schemata that are either not referenced, or the first
encountered schema in a cycle
The good thing is that this approach does not require any change in Avro: you
can start using it today if you like.
> Add feature to know if schema is imported in avdl
> -------------------------------------------------
>
> Key: AVRO-3890
> URL: https://issues.apache.org/jira/browse/AVRO-3890
> Project: Apache Avro
> Issue Type: New Feature
> Components: java
> Affects Versions: 1.11.2, 1.11.3
> Reporter: Thun Hak
> Priority: Minor
>
> consider the this invoice.avdl:
> {code:java}
> @namespace("purchase")
> protocol InvoiceProtocol{
> import idl "../customer/data.avdl";
> import idl "../product/data.avdl";
> record Invoice{
> timestamp_ms purchaseTime;
> customer.Customer customer;
> array<product.Item> items = [];
> }
> }{code}
> now, if I do this:
> {code:java}
> for(Schema s : protocol.getTypes()){
> System.out.println(s.getName() + " " + s.isImported());
> }{code}
> this should produce
> {code:java}
> Customer true
> Item true
> Invoice false{code}
> I have some use case where we want to perform operations only to the "main"
> schema and leave all imported schema alone.
> This feature (s.isImported()) would be really nice to have (if it's not
> available already).
> Thanks
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