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https://issues.apache.org/jira/browse/AVRO-1614?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Niels Basjes updated AVRO-1614:
-------------------------------
Attachment: AVRO-1614-20141204-v4.patch
- Added new test idl to seekout colissions (builder, Builder, etc.).
- Fixed (existing) bug that came to light when using the record name "Builder".
- Reduced the number of whitespace changes as much as possible.
> Always getting a value...
> -------------------------
>
> Key: AVRO-1614
> URL: https://issues.apache.org/jira/browse/AVRO-1614
> Project: Avro
> Issue Type: New Feature
> Components: java
> Reporter: Niels Basjes
> Labels: java
> Attachments: AVRO-1614-20141027-v1.patch,
> AVRO-1614-20141201-v2.patch, AVRO-1614-20141202-v3.patch,
> AVRO-1614-20141204-v4.patch
>
>
> Sometimes the Avro structure becomes deeply nested.
> If in such a scenario you want to be able to set a specific value deep in
> this tree you want to do this:
> {code}
> public void setSomething(String value) {
> myStruct
> .getFoo()
> .getBar()
> .getOne()
> .getOther()
> .setSomething(value);
> }
> {code}
> The 'problem' I ran into is that any of the 4 get methods can return a null
> value so the code I have to write is really huge.
> For every step in this method I have to build null checks and create the
> underlying instance if it is null.
> I already started writing helper methods to do this for parts of my tree.
> To solve this in a way that makes this code readable I came up with the
> following which I want to propose to you guys (before I start working on a
> patch).
> My idea is to generate a new 'get' method in addition to the existing normal
> get method for the regular instance of the class.
> So in addition to the
> {code}
> public Foo getFoo() {
> return foo;
> }
> {code}
> I propose to generate something like this as well in the cases where this is
> a type of structure that you may want to traverse as shown in the example.
> {code}
> public Foo getAlwaysFoo() {
> if (foo == null) {
> setFoo(Foo.newBuilder().build());
> }
> return foo;
> }
> {code}
> This way the automatically created instance immediately has all the defaults
> I have defined.
> Assuming this naming my code will be readable because it will look like this:
> {code}
> public void setSomething(String value) {
> myStruct
> .getAlwaysFoo()
> .getAlwaysBar()
> .getAlwaysOne()
> .getAlwaysOther()
> .setSomething(value);
> }
> {code}
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