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https://issues.apache.org/jira/browse/AVRO-1188?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13495235#comment-13495235
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Sharmarke Aden commented on AVRO-1188:
--------------------------------------
This patch makes everything hunky-dory and backward compatible by checking to
see if the user opted in to the importing of files. If user specified
importedFiles then a single schema parser is used otherwise we do things the
old way and create a new schema parser every time.
> External Schema Imports via AVSC Schema
> ---------------------------------------
>
> Key: AVRO-1188
> URL: https://issues.apache.org/jira/browse/AVRO-1188
> Project: Avro
> Issue Type: New Feature
> Components: java
> Reporter: Sharmarke Aden
> Attachments: Avro-1188.tar.gz, vcs-diff1160361655737792386.patch,
> vcs-diff2916139350460140957.patch, vcs-diff4277815358664835838.patch
>
>
> There is no way for ".avsc" schema files to import types (i.e records, enums,
> etc) in external schema files. There's tremendous benefit in being able to do
> this as it would allow the sharing of common types between multiple schema
> files. Here's a use case that illustrates the typical usecase of this feature
> request.
> Suppose we have an enum called "Privacy" that we would like to share between
> multiple schemas:
> {code}
> //privacy.avsc
> {
> "type": "enum",
> "name": "Privacy",
> "symbols" : ["Public", "Private"]
> }
> {code}
> Now, if this feature was implemented one could import the above type into
> other schema files by doing something like this:
> {code}
> //the post.avsc
> {
> "type": "record",
> "name": "Post",
> "imports": ["privacy.avsc"] //you can import one or more schemas
> "fields": [{
> "name": "privacy",
> "type": [ "null", "Privacy"], //use imported Privacy type
> "default": "Private"
> }
> ]
> }
> {code}
> Here's another schema file that also has a similar privacy concern:
> {code}
> //the event.avsc is another schema that also imports the privacy type
> {
> "type": "record",
> "name": "Event",
> "imports": ["privacy.avsc"] //it also imports the privacy schemas
> "fields": [{
> "name": "privacy",
> "type": [ "null", "Privacy"], //use imported Privacy type
> "default": "Public"
> }
> ]
> }
> {code}
> IDL files are able to import external schemas and protocols and it would be
> very beneficial if schema files could import other schema files.
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