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[Compiler plugin] Support unfold
#1127
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24 changes: 24 additions & 0 deletions
24
core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/impl/api/unfold.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,24 @@ | ||
| package org.jetbrains.kotlinx.dataframe.impl.api | ||
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|
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| import org.jetbrains.kotlinx.dataframe.AnyCol | ||
| import org.jetbrains.kotlinx.dataframe.DataColumn | ||
| import org.jetbrains.kotlinx.dataframe.api.CreateDataFrameDsl | ||
| import org.jetbrains.kotlinx.dataframe.api.asColumnGroup | ||
| import org.jetbrains.kotlinx.dataframe.api.asDataColumn | ||
| import org.jetbrains.kotlinx.dataframe.columns.ColumnKind | ||
| import org.jetbrains.kotlinx.dataframe.typeClass | ||
|
|
||
| @PublishedApi | ||
| internal fun <T> DataColumn<T>.unfoldImpl(body: CreateDataFrameDsl<T>.() -> Unit): AnyCol = | ||
| when (kind()) { | ||
| ColumnKind.Group, ColumnKind.Frame -> this | ||
|
|
||
| else -> when { | ||
| !typeClass.canBeUnfolded -> this | ||
|
|
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| else -> values() | ||
| .createDataFrameImpl(typeClass) { (this as CreateDataFrameDsl<T>).body() } | ||
| .asColumnGroup(name()) | ||
| .asDataColumn() | ||
| } | ||
| } |
68 changes: 68 additions & 0 deletions
68
core/src/test/kotlin/org/jetbrains/kotlinx/dataframe/api/unfold.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,68 @@ | ||
| package org.jetbrains.kotlinx.dataframe.api | ||
|
|
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| import io.kotest.matchers.shouldBe | ||
| import io.kotest.matchers.types.shouldBeInstanceOf | ||
| import org.jetbrains.kotlinx.dataframe.AnyFrame | ||
| import org.junit.Test | ||
| import kotlin.reflect.typeOf | ||
|
|
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| class UnfoldTests { | ||
| @Test | ||
| fun unfold() { | ||
| val df = dataFrameOf( | ||
| "col" to listOf(A("123", 321)), | ||
| ) | ||
|
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| val res = df.unfold { col("col") } | ||
| res[pathOf("col", "str")][0] shouldBe "123" | ||
| res[pathOf("col", "i")][0] shouldBe 321 | ||
| } | ||
|
|
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| @Test | ||
| fun `unfold deep`() { | ||
| val df1 = dataFrameOf( | ||
| "col" to listOf( | ||
| Group( | ||
| "1", | ||
| listOf( | ||
| Person("Alice", "Cooper", 15, "London"), | ||
| Person("Bob", "Dylan", 45, "Dubai"), | ||
| ), | ||
| ), | ||
| Group( | ||
| "2", | ||
| listOf( | ||
| Person("Charlie", "Daniels", 20, "Moscow"), | ||
| Person("Charlie", "Chaplin", 40, "Milan"), | ||
| ), | ||
| ), | ||
| ), | ||
| ) | ||
|
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| df1.unfold { col("col") }[pathOf("col", "participants")].type() shouldBe typeOf<List<Person>>() | ||
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| df1.unfold(maxDepth = 2) { col("col") }[pathOf("col", "participants")][0].shouldBeInstanceOf<AnyFrame> { | ||
| it["firstName"][0] shouldBe "Alice" | ||
| } | ||
| } | ||
|
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| @Test | ||
| fun `keep value type`() { | ||
| val values = listOf(1, 2, 3, 4) | ||
| val df2 = dataFrameOf("int" to values) | ||
| val column = df2.unfold { col("int") }["int"] | ||
| column.type() shouldBe typeOf<Int>() | ||
| column.values() shouldBe values | ||
| } | ||
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| data class A(val str: String, val i: Int) | ||
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| data class Person( | ||
| val firstName: String, | ||
| val lastName: String, | ||
| val age: Int, | ||
| val city: String?, | ||
| ) | ||
|
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| data class Group(val id: String, val participants: List<Person>) | ||
| } |
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38 changes: 38 additions & 0 deletions
38
plugins/kotlin-dataframe/src/org/jetbrains/kotlinx/dataframe/plugin/impl/api/unfold.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| package org.jetbrains.kotlinx.dataframe.plugin.impl.api | ||
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|
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| import org.jetbrains.kotlinx.dataframe.api.replace | ||
| import org.jetbrains.kotlinx.dataframe.api.with | ||
| import org.jetbrains.kotlinx.dataframe.plugin.impl.AbstractSchemaModificationInterpreter | ||
| import org.jetbrains.kotlinx.dataframe.plugin.impl.Arguments | ||
| import org.jetbrains.kotlinx.dataframe.plugin.impl.PluginDataFrameSchema | ||
| import org.jetbrains.kotlinx.dataframe.plugin.impl.Present | ||
| import org.jetbrains.kotlinx.dataframe.plugin.impl.SimpleColumnGroup | ||
| import org.jetbrains.kotlinx.dataframe.plugin.impl.SimpleDataColumn | ||
| import org.jetbrains.kotlinx.dataframe.plugin.impl.asDataColumn | ||
| import org.jetbrains.kotlinx.dataframe.plugin.impl.asDataFrame | ||
| import org.jetbrains.kotlinx.dataframe.plugin.impl.asSimpleColumn | ||
| import org.jetbrains.kotlinx.dataframe.plugin.impl.dataFrame | ||
| import org.jetbrains.kotlinx.dataframe.plugin.impl.ignore | ||
| import org.jetbrains.kotlinx.dataframe.plugin.impl.toPluginDataFrameSchema | ||
|
|
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| class DataFrameUnfold : AbstractSchemaModificationInterpreter() { | ||
| val Arguments.receiver: PluginDataFrameSchema by dataFrame() | ||
| val Arguments.properties by ignore() | ||
| val Arguments.maxDepth: Int by arg(defaultValue = Present(0)) | ||
| val Arguments.columns: ColumnsResolver by arg() | ||
|
|
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| override fun Arguments.interpret(): PluginDataFrameSchema { | ||
| return receiver.asDataFrame().replace { columns }.with { | ||
| val column = it.asSimpleColumn() as? SimpleDataColumn | ||
| if (column != null) { | ||
| if (!column.type.type.canBeUnfolded(session)) { | ||
| it | ||
| } else { | ||
| SimpleColumnGroup(it.name(), toDataFrame(maxDepth, column.type.type, TraverseConfiguration()).columns()).asDataColumn() | ||
| } | ||
| } else { | ||
| it | ||
| } | ||
| }.toPluginDataFrameSchema() | ||
| } | ||
| } |
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