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Add extension function for addMixin #554

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Apr 8, 2023
Merged

Add extension function for addMixin #554

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3 changes: 3 additions & 0 deletions src/main/kotlin/com/fasterxml/jackson/module/kotlin/Extensions.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -59,6 +59,9 @@ inline fun <reified T> ObjectReader.readValueTyped(jp: JsonParser): T = readValu
inline fun <reified T> ObjectReader.readValuesTyped(jp: JsonParser): Iterator<T> = readValues(jp, jacksonTypeRef<T>())
inline fun <reified T> ObjectReader.treeToValue(n: TreeNode): T? = readValue(this.treeAsTokens(n), jacksonTypeRef<T>())

inline fun <reified T, reified U> ObjectMapper.addMixIn(): ObjectMapper = this.addMixIn(T::class.java, U::class.java)
inline fun <reified T, reified U> JsonMapper.Builder.addMixIn(): JsonMapper.Builder = this.addMixIn(T::class.java, U::class.java)

operator fun ArrayNode.plus(element: Boolean) = Unit.apply { add(element) }
operator fun ArrayNode.plus(element: Short) = Unit.apply { add(element) }
operator fun ArrayNode.plus(element: Int) = Unit.apply { add(element) }
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17 changes: 16 additions & 1 deletion src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/ExtensionMethodsTests.kt
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@@ -1,11 +1,15 @@
package com.fasterxml.jackson.module.kotlin.test

import com.fasterxml.jackson.annotation.JsonIgnore
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.module.kotlin.addMixIn
import com.fasterxml.jackson.module.kotlin.contains
import com.fasterxml.jackson.module.kotlin.convertValue
import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
import com.fasterxml.jackson.module.kotlin.jsonMapper
import com.fasterxml.jackson.module.kotlin.minusAssign
import com.fasterxml.jackson.module.kotlin.plusAssign
import com.fasterxml.jackson.module.kotlin.readValue
Expand Down Expand Up @@ -82,4 +86,15 @@ class TestExtensionMethods {
val convertValueResult: List<Person> = mapper.convertValue(tree)
assertThat(convertValueResult, `is`(listOf(Person("Neo"))))
}
}

@Test fun mixInExtensionTest() {

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

val mapper: JsonMapper = jsonMapper { addMixIn<Person, PersonMixIn>() }
val serializedPerson: String = mapper.writeValueAsString(Person("test"))

assertThat(serializedPerson, `is`("{}"))
}
}