[
https://issues.apache.org/jira/browse/AVRO-1274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13647360#comment-13647360
]
Scott Carey commented on AVRO-1274:
-----------------------------------
I am working on a modification to the builder that would make its use look like
a json schema.
{code}
public static final org.apache.avro.Schema SCHEMA$ = new
org.apache.avro.Schema.Parser().parse(
"{\"type\":\"record\",\"name\":\"HandshakeRequest\",\"namespace\":\"org.apache.avro.ipc\",\"fields\":[
{\"name\":\"clientHash\",\"type\":{\"type\":\"fixed\",\"name\":\"MD5\",\"size\":16}},
{\"name\":\"clientProtocol\",\"type\":[\"null\",{\"type\":\"string\",\"avro.java.string\":\"String\"}]},
{\"name\":\"serverHash\",\"type\":\"MD5\"},
{\"name\":\"meta\",\"type\":[\"null\",{\"type\":\"map\",\"values\":\"bytes\",\"avro.java.string\":\"String\"}]}
]}");
{code}
becomes similar to:
{code}
public static final org.apache.avro.Schema SCHEMA$ = SchemaBuilder
.typeRecord("HandshakeRequest").namespaceInherited("org.apache.avro.ipc").fields()//
optional namespace inheritance
.typeFixed("clientHash", MD5.SCHEMA$).field() // or
typeFixed("clientHash", "MD5", 16)
.typeUnion("clientProtocol").ofNull().andString().withProp("avro.java.string",
"String").field()
.typeFixed("serverHash", "MD5").field() // uses reference to already
defined MD5
.typeUnion("meta").ofNull().andMap().withProp("avro.java.string",
"String").valuesBytes().field()
.record();
{code}
we can also have shortcuts as before, for example
optionalInt("x", -1) as a shortcut for typeUnion("x").ofInt(-1).andNull()
nullableInt("maybe") as a shortcut for typeUnion("maybe").ofNull(null).andInt()
requiredInt("yes") may not be necessary, its shortcut would be
typeInt("yes").field();
It should be straightforward to implement the whole Schema.Parser with the
above (and simplify the parser), which makes it easy to test very thoroughly;
there is an intentional 1:1 mapping between the parser, spec, and the builder.
> Add a schema builder API
> ------------------------
>
> Key: AVRO-1274
> URL: https://issues.apache.org/jira/browse/AVRO-1274
> Project: Avro
> Issue Type: New Feature
> Components: java
> Reporter: Tom White
> Assignee: Tom White
> Fix For: 1.7.5
>
> Attachments: AVRO-1274.patch, AVRO-1274.patch, AVRO-1274.patch,
> AVRO-1274.patch, AVRO-1274.patch, AVRO-1274.patch, AVRO-1274.patch,
> TestDefaults.patch
>
>
> It would be nice to have a fluent API that made it easier to construct record
> schemas.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
