Fix JacksonInject priority

release-notes/CREDITS-2.x

@@ -18,6 +18,7 @@ Contributors:
 # 2.17.0 (not yet released)
 
 WrongWrong (@k163377)
+* #738: Fix JacksonInject priority.
 * #732: SequenceSerializer removed.
 * #727: Fixed overriding findCreatorAnnotation instead of hasCreatorAnnotation
 

release-notes/VERSION-2.x

@@ -18,6 +18,7 @@ Co-maintainers:
 
 2.17.0 (not yet released)
 
+#738: JacksonInject is now preferred over the default argument(fixes #722).
 #732: SequenceSerializer removed.
 #727: Fixed overriding findCreatorAnnotation instead of hasCreatorAnnotation.
 

src/main/kotlin/com/fasterxml/jackson/module/kotlin/KotlinValueInstantiator.kt

@@ -11,7 +11,6 @@ import com.fasterxml.jackson.databind.deser.ValueInstantiators
 import com.fasterxml.jackson.databind.deser.impl.NullsAsEmptyProvider
 import com.fasterxml.jackson.databind.deser.impl.PropertyValueBuffer
 import com.fasterxml.jackson.databind.deser.std.StdValueInstantiator
-import com.fasterxml.jackson.databind.exc.MismatchedInputException
 import java.lang.reflect.TypeVariable
 import kotlin.reflect.KParameter
 import kotlin.reflect.KType
@@ -67,24 +66,20 @@ internal class KotlinValueInstantiator(
             val jsonProp = props[idx]
             val isMissing = !buffer.hasParameter(jsonProp)
 
-            if (isMissing && paramDef.isOptional) {
-                return@forEachIndexed
-            }
-
             val paramType = paramDef.type
-            var paramVal = if (!isMissing || paramDef.isPrimitive() || jsonProp.hasInjectableValueId()) {
+            var paramVal = if (!isMissing || jsonProp.hasInjectableValueId()) {
                 val tempParamVal = buffer.getParameter(jsonProp)
                 if (tempParamVal == null && jsonProp.skipNulls() && paramDef.isOptional) {
                     return@forEachIndexed
                 }
                 tempParamVal
             } else {
-                if(paramType.isMarkedNullable) {
+                when {
+                    paramDef.isOptional -> return@forEachIndexed
                     // do not try to create any object if it is nullable and the value is missing
-                    null
-                } else {
+                    paramType.isMarkedNullable -> null
                     // to get suitable "missing" value provided by deserializer
-                    jsonProp.valueDeserializer?.getAbsentValue(ctxt)
+                    else -> jsonProp.valueDeserializer?.getAbsentValue(ctxt)
                 }
             }
 
@@ -157,13 +152,6 @@ internal class KotlinValueInstantiator(
 
     }
 
-    private fun KParameter.isPrimitive(): Boolean {
-        return when (val javaType = type.javaType) {
-            is Class<*> -> javaType.isPrimitive
-            else -> false
-        }
-    }
-
     private fun SettableBeanProperty.hasInjectableValueId(): Boolean = injectableValueId != null
 }
 

src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/FailNullForPrimitiveTest.kt

@@ -0,0 +1,32 @@
+package com.fasterxml.jackson.module.kotlin.test
+
+import com.fasterxml.jackson.databind.DeserializationFeature
+import com.fasterxml.jackson.databind.exc.MismatchedInputException
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.module.kotlin.readValue
+import junit.framework.TestCase.assertEquals
+import org.junit.Assert.assertThrows
+import kotlin.test.Test
+
+class FailNullForPrimitiveTest {
+    data class Dto(
+        val foo: Int,
+        val bar: Int?
+    )
+
+    @Test
+    fun test() {
+        val mapper = jacksonObjectMapper()
+            .enable(DeserializationFeature.FAIL_ON_NULL_FOR_PRIMITIVES)
+
+        assertThrows(MismatchedInputException::class.java) {
+            mapper.readValue<Dto>("{}")
+        }
+
+        assertThrows(MismatchedInputException::class.java) {
+            mapper.readValue<Dto>("""{"foo":null}""")
+        }
+
+        assertEquals(Dto(0, null), mapper.readValue<Dto>("""{"foo":0}"""))
+    }
+}

src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/Github722.kt

@@ -6,6 +6,7 @@ import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.databind.InjectableValues
 import com.fasterxml.jackson.databind.ObjectMapper
 import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import kotlin.math.exp
 import kotlin.test.Test
 import kotlin.test.assertEquals
 import kotlin.test.assertNotEquals
@@ -43,8 +44,7 @@ class Github722 {
             .with(InjectableValues.Std(injectValues))
             .readValue<FailingDto>("{}")
 
-        assertNotEquals(result, expected, "GitHubXXX fixed.")
-        assertEquals(FailingDto(), result)
+        assertEquals(expected, result)
     }
 
     data class WithoutDefaultValue(