Kristian Rickert created AVRO-3660:
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Summary: SpecificRecord java data generator helper method - should
I contribute?
Key: AVRO-3660
URL: https://issues.apache.org/jira/browse/AVRO-3660
Project: Apache Avro
Issue Type: Improvement
Components: java
Affects Versions: 1.11.1
Reporter: Kristian Rickert
I'm not sure if this is useful or if there's already something there for Avro -
but I wrote a simple helper method for Java users that allows for RandomData to
return a specific data type when given a class.
So when I'm writing tests for my schema data, I generate the SpecificRecord
classes by doing this:
Given: generated classes with avro in java.
In this case, imagine there's a generated class called {{Article}}
What this does:
{code:java}
Article randomArticleData = specificAvroRecordGenerator(Article.class){code}
I'm aware the RandomData class can create GenericData, but I've found this
method to be very useful when writing code that goes to a queue to test and
end-to-end transport without having to write too much code.
However, i'm not sure if something is already in the repo that does this.
So here's my implementation:
{code:java}
public static <T extends SpecificRecordBase> T
specificAvroRecordGenerator(Class<T> avroClassType) {
try {
Field field = avroClassType.getDeclaredField("SCHEMA$");
return specificAvroRecordGenerator((Schema)field.get(null));
} catch (IllegalAccessException | NoSuchFieldException e) {
throw new RuntimeException(e);
}
}
@SuppressWarnings("unchecked")
public static <T extends SpecificRecordBase> T
specificAvroRecordGenerator(Schema schema) {
GenericRecord test =
(GenericRecord)new RandomData(schema, 1)
.iterator().next();
return (T) SpecificData.get().deepCopy(test.getSchema(), test);
}{code}
The good: it works
The bad: it uses reflection because the current RandomData class outputs
generic data classes instead.
I don't think that is necessarily bad. But I think it's a really useful set of
2 methods. I saw a couple people on stackoverflow inquire about it.
So my two questions:
1) is there a simple method that already does this and I can't find it?
2) is there an easier way to do this?
I'd be happy to contribute. Let me know if I should
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