Automated commit of generated code

Author: github-actions[bot]

core/generated-sources/src/main/kotlin/org/jetbrains/kotlinx/dataframe/api/DataColumnType.kt

@@ -16,12 +16,10 @@ import java.math.BigDecimal
 import java.math.BigInteger
 import kotlin.contracts.ExperimentalContracts
 import kotlin.contracts.contract
-import kotlin.reflect.KClass
 import kotlin.reflect.KType
 import kotlin.reflect.KTypeProjection
 import kotlin.reflect.KVariance
 import kotlin.reflect.full.createType
-import kotlin.reflect.full.isSubclassOf
 import kotlin.reflect.full.isSubtypeOf
 import kotlin.reflect.full.withNullability
 import kotlin.reflect.typeOf
@@ -87,13 +85,3 @@ public fun AnyCol.valuesAreComparable(): Boolean =
                 nullable = hasNulls(),
             ),
         )
-
-@PublishedApi
-internal fun AnyCol.isPrimitive(): Boolean = typeClass.isPrimitive()
-
-internal fun KClass<*>.isPrimitive(): Boolean =
-    isSubclassOf(Number::class) ||
-        this == String::class ||
-        this == Char::class ||
-        this == Array::class ||
-        isSubclassOf(Collection::class)

core/generated-sources/src/main/kotlin/org/jetbrains/kotlinx/dataframe/api/toDataFrame.kt

@@ -11,9 +11,8 @@ import org.jetbrains.kotlinx.dataframe.annotations.Interpretable
 import org.jetbrains.kotlinx.dataframe.annotations.Refine
 import org.jetbrains.kotlinx.dataframe.columns.ColumnPath
 import org.jetbrains.kotlinx.dataframe.impl.ColumnNameGenerator
+import org.jetbrains.kotlinx.dataframe.impl.api.canBeUnfolded
 import org.jetbrains.kotlinx.dataframe.impl.api.createDataFrameImpl
-import org.jetbrains.kotlinx.dataframe.impl.api.hasProperties
-import org.jetbrains.kotlinx.dataframe.impl.api.isValueType
 import org.jetbrains.kotlinx.dataframe.impl.asList
 import org.jetbrains.kotlinx.dataframe.impl.columnName
 import org.jetbrains.kotlinx.dataframe.impl.columns.createColumnGuessingType
@@ -30,7 +29,7 @@ public inline fun <reified T> Iterable<T>.toDataFrame(): DataFrame<T> =
     toDataFrame {
         // check if type is value: primitives, primitive arrays, datetime types etc.,
         // or has no properties
-        if (T::class.isValueType || !T::class.hasProperties) {
+        if (!T::class.canBeUnfolded) {
             // create a single `value` column
             ValueProperty<T>::value from { it }
         } else {

core/generated-sources/src/main/kotlin/org/jetbrains/kotlinx/dataframe/api/unfold.kt

@@ -8,6 +8,7 @@ import org.jetbrains.kotlinx.dataframe.DataFrame
 import org.jetbrains.kotlinx.dataframe.annotations.AccessApiOverload
 import org.jetbrains.kotlinx.dataframe.columns.ColumnKind
 import org.jetbrains.kotlinx.dataframe.columns.toColumnSet
+import org.jetbrains.kotlinx.dataframe.impl.api.canBeUnfolded
 import org.jetbrains.kotlinx.dataframe.impl.api.createDataFrameImpl
 import org.jetbrains.kotlinx.dataframe.typeClass
 import kotlin.reflect.KProperty
@@ -17,7 +18,7 @@ public inline fun <reified T> DataColumn<T>.unfold(): AnyCol =
         ColumnKind.Group, ColumnKind.Frame -> this
 
         else -> when {
-            isPrimitive() -> this
+            !typeClass.canBeUnfolded -> this
 
             else -> values()
                 .createDataFrameImpl(typeClass) { (this as CreateDataFrameDsl<T>).properties() }

core/generated-sources/src/main/kotlin/org/jetbrains/kotlinx/dataframe/impl/api/toDataFrame.kt

@@ -56,8 +56,24 @@ private val valueTypes = setOf(
     kotlinx.datetime.TimeZone::class,
     kotlinx.datetime.DateTimePeriod::class,
     kotlinx.datetime.DateTimeUnit::class,
+    Map::class,
+    MutableMap::class,
 )
 
+/**
+ * Determines whether a class can be unfolded into its properties.
+ *
+ * A class is considered **unfoldable** if it has at least one public property
+ * or getter-like function. This excludes:
+ * - **Value types** such as primitives, enums, and date-time types.
+ * - **Classes without properties**, including empty or marker classes.
+ *
+ * @return `true` if the class has unfoldable properties, `false` otherwise.
+ */
+@PublishedApi
+internal val KClass<*>.canBeUnfolded: Boolean
+    get() = (!this.isValueType) && this.hasProperties
+
 /**
  * Checks if `KClass` is a value type (number, datetime, string, etc.)
  * Should be aligned with `ConeKotlinType.isValueType()` in

core/generated-sources/src/test/kotlin/org/jetbrains/kotlinx/dataframe/api/toDataFrame.kt

@@ -398,6 +398,14 @@ class CreateDataFrameTests {
         enums.toDataFrame() shouldBe dataFrameOf("value")(*enums.toTypedArray())
     }
 
+    @Test
+    fun `should convert iterables of non-JSON Map to DataFrame with value column`() {
+        val maps: List<Map<*, *>?> = listOf(mapOf(1 to null, 2 to "val"), mapOf(3 to 1, 4 to true), null)
+        val df = maps.toDataFrame()
+        df.columnNames() shouldBe listOf("value")
+        df["value"].toList() shouldBe maps
+    }
+
     class NoPublicPropsClass(private val a: Int, private val b: String)
 
     @Test