Description
Expected Behavior
Add support to be able to easily configure a DataClassRowMapper when using JdbcCursorItemReaderBuilder & JdbcPagingItemReaderBuilder - similar to the existing beanRowMapper functionality added in #895 and #819. This would make it easier to set up jdbc item readers when the target class is a Java record or Kotlin data class.
One approach could be to modify the existing JdbcCursorItemReaderBuilder::beanRowMapper & JdbcPagingItemReaderBuilder::beanRowMapper methods to set a DataClassRowMapper instead of a BeanPropertyRowMapper - according to the docs it is backwards compatible.
Note that this class extends BeanPropertyRowMapper and can therefore serve as a common choice for any mapped target class, flexibly adapting to constructor style versus setter methods in the mapped class.
public JdbcCursorItemReaderBuilder<T> beanRowMapper(Class<T> mappedClass) {
this.rowMapper = new DataClassRowMapper<>(mappedClass);
return this;
}A second approach could be to add new builder methods JdbcCursorItemReaderBuilder::dataRowMapper & JdbcPagingItemReaderBuilder::dataRowMapper that create and set a DataClassRowMapper.
public JdbcCursorItemReaderBuilder<T> dataRowMapper(Class<T> mappedClass) {
this.rowMapper = new DataClassRowMapper<>(mappedClass);
return this;
}If there is a preferred approach, please let me know and I will be happy to try to contribute a PR for the changes! 🤓
Current Behavior
JdbcPagingItemReader<Foo> reader = new JdbcPagingItemReaderBuilder<Foo>()
...
.beanRowMapper(Foo.class)
.build();and
JdbcCursorItemReader<Foo> reader = new JdbcCursorItemReaderBuilder<Foo>()
...
.beanRowMapper(Foo.class)
.build();will create item readers w/ a BeanPropertyRowMapper. From the docs:
If you need to map to a target class which has a data class constructor — for example, a Java record or a Kotlin data class — use DataClassRowMapper instead.
Context
As we convert batch jobs to use java record classes, we find ourselves needing to change
.beanRowMapper(Foo.class) -> .rowMapper(new DataClassRowMapper<>(FooRecord.class)) over and over again.