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Added addMixIn function for generic MapperBuilder #408

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Merged
k163377 merged 1 commit into from
Dec 31, 2025
Merged

Added addMixIn function for generic MapperBuilder #408

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2 changes: 2 additions & 0 deletions src/main/kotlin/io/github/projectmapk/jackson/module/kogera/Extensions.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@ import com.fasterxml.jackson.databind.Module
import com.fasterxml.jackson.databind.ObjectMapper
import com.fasterxml.jackson.databind.ObjectReader
import com.fasterxml.jackson.databind.RuntimeJsonMappingException
import com.fasterxml.jackson.databind.cfg.MapperBuilder
import com.fasterxml.jackson.databind.cfg.MutableConfigOverride
import com.fasterxml.jackson.databind.json.JsonMapper
import com.fasterxml.jackson.databind.module.SimpleModule
Expand Down Expand Up @@ -200,6 +201,7 @@ public inline fun <reified T, reified U> JsonMapper.Builder.addMixIn(): JsonMapp
T::class.java,
U::class.java,
)
public inline fun <M : MapperBuilder<*, M>, reified T, reified U> M.addMixIn(): M = this.addMixIn(T::class.java, U::class.java)

public operator fun ArrayNode.plus(element: Boolean) {
add(element)
Expand Down
14 changes: 14 additions & 0 deletions .../kotlin/io/github/projectmapk/jackson/module/kogera/zPorted/test/ExtensionMethodsTests.kt
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Expand Up @@ -5,6 +5,7 @@ import com.fasterxml.jackson.databind.ObjectMapper
import com.fasterxml.jackson.databind.SerializationFeature
import com.fasterxml.jackson.databind.json.JsonMapper
import com.fasterxml.jackson.databind.node.JsonNodeFactory
import com.fasterxml.jackson.dataformat.csv.CsvMapper
import io.github.projectmapk.jackson.module.kogera.addMixIn
import io.github.projectmapk.jackson.module.kogera.contains
import io.github.projectmapk.jackson.module.kogera.convertValue
Expand Down Expand Up @@ -101,4 +102,17 @@ private class TestExtensionMethods {

assertEquals("{}", serializedPerson)
}

@Test fun mixInExtensionForGenericMapperBuilderTest() {
data class Person(val name: String)
abstract class PersonMixIn { @JsonIgnore var name: String = "" }

// Assigned to a temporary variable to ensure that addMixIn returns a builder with the proper type
val mapperBuilder: CsvMapper.Builder = CsvMapper.builder()
.addMixIn<_, Person, PersonMixIn>()
val mapper: CsvMapper = mapperBuilder.build()
val serializedPerson: String = mapper.writeValueAsString(Person("test"))

assertEquals("", serializedPerson)
}
}
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