From 9697092a5084f35d9e1912044f823ff9622474ee Mon Sep 17 00:00:00 2001
From: Jolan Rensen <jolan.rensen@jetbrains.com>
Date: Sun, 26 Jan 2025 12:57:31 +0100
Subject: [PATCH] creating compiler-plugin support for renameToCamelCase.kt

---
 .../jetbrains/kotlinx/dataframe/api/rename.kt    |  2 ++
 .../testData/box/renameToCamelCase.kt            | 16 ++++++++++++++++
 2 files changed, 18 insertions(+)
 create mode 100644 plugins/kotlin-dataframe/testData/box/renameToCamelCase.kt

diff --git a/core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/api/rename.kt b/core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/api/rename.kt
index 76744bbe43..d04bd991f3 100644
--- a/core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/api/rename.kt
+++ b/core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/api/rename.kt
@@ -52,6 +52,8 @@ public class RenameClause<T, C>(internal val df: DataFrame<T>, internal val colu
  * and converting the first char to lowercase.
  * Even [DataFrames][DataFrame] inside [FrameColumns][FrameColumn] are traversed recursively.
  */
+@Refine
+@Interpretable("RenameToCamelCase")
 public fun <T> DataFrame<T>.renameToCamelCase(): DataFrame<T> =
     // recursively rename all columns written with delimiters or starting with a capital to camel case
     rename {
diff --git a/plugins/kotlin-dataframe/testData/box/renameToCamelCase.kt b/plugins/kotlin-dataframe/testData/box/renameToCamelCase.kt
new file mode 100644
index 0000000000..58bfdec70c
--- /dev/null
+++ b/plugins/kotlin-dataframe/testData/box/renameToCamelCase.kt
@@ -0,0 +1,16 @@
+import org.jetbrains.kotlinx.dataframe.*
+import org.jetbrains.kotlinx.dataframe.annotations.*
+import org.jetbrains.kotlinx.dataframe.api.*
+import org.jetbrains.kotlinx.dataframe.io.*
+
+data class Nested(val some_double: Double)
+
+data class Record(val my_user: String, val age: Int, val nested_type: Nested)
+
+fun box(): String {
+    val df = listOf(Record("112", 42, Nested(3.0))).toDataFrame(maxDepth = 1)
+    val df1 = df.renameToCamelCase()
+    df1.nestedType.someDouble
+    df1.myUser
+    return "OK"
+}