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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| package at.kopyk | ||
|
|
||
| import at.kopyk.poet.addReturn | ||
| import at.kopyk.poet.append | ||
| import at.kopyk.utils.ClassCompileScope | ||
| import at.kopyk.utils.addGeneratedMarker | ||
| import at.kopyk.utils.baseName | ||
| import at.kopyk.utils.getPrimaryConstructorProperties | ||
| import at.kopyk.utils.lang.mapRun | ||
| import com.google.devtools.ksp.symbol.KSClassDeclaration | ||
| import com.google.devtools.ksp.symbol.KSType | ||
| import com.squareup.kotlinpoet.FileSpec | ||
| import com.squareup.kotlinpoet.ksp.toTypeName | ||
|
|
||
| internal val ClassCompileScope.copyFromParentKt: FileSpec | ||
| get() = buildFile(fileName = target.append("FromParent").reflectionName()) { | ||
| val parameterized = target.parameterized | ||
| addGeneratedMarker() | ||
|
|
||
| parentTypes | ||
| .filter { it.containsAllPropertiesOf(classDeclaration) } | ||
| .forEach { parent -> | ||
| addInlinedFunction(name = target.simpleName, receives = null, returns = parameterized) { | ||
| addParameter( | ||
| name = "from", | ||
| type = parent.toTypeName(typeParameterResolver) | ||
| ) | ||
| properties | ||
| .mapRun { "$baseName = from.$baseName" } | ||
| .run { addReturn("${target.simpleName}(${joinToString()})") } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| internal fun KSType.containsAllPropertiesOf(child: KSClassDeclaration): Boolean = | ||
| child.getPrimaryConstructorProperties().all { childProperty -> | ||
| (this.declaration as? KSClassDeclaration)?.getAllProperties().orEmpty().any { parentProperty -> | ||
| childProperty.baseName == parentProperty.baseName && | ||
| childProperty.type.resolve().isAssignableFrom(parentProperty.type.resolve()) | ||
| } | ||
| } |
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53 changes: 53 additions & 0 deletions
53
kopykat-ksp/src/test/kotlin/at/kopyk/CopyFromParentTest.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| package at.kopyk | ||
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|
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| import org.junit.jupiter.api.Test | ||
|
|
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| class CopyFromParentTest { | ||
|
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| @Test | ||
| fun `simple test`() { | ||
| """ | ||
| |interface Person { | ||
| | val name: String | ||
| | val age: Int | ||
| |} | ||
| |data class Person1(override val name: String, override val age: Int): Person | ||
| |data class Person2(override val name: String, override val age: Int): Person | ||
| | | ||
| |val p1 = Person1("Alex", 1) | ||
| |val p2 = Person2(p1) | ||
| |val r = p2.age | ||
| """.evals("r" to 1) | ||
| } | ||
|
|
||
| @Test | ||
| fun `simple test, non-data class`() { | ||
| """ | ||
| |interface Person { | ||
| | val name: String | ||
| | val age: Int | ||
| |} | ||
| |class Person1(override val name: String, override val age: Int): Person | ||
| |data class Person2(override val name: String, override val age: Int): Person | ||
| | | ||
| |val p1 = Person1("Alex", 1) | ||
| |val p2 = Person2(p1) | ||
| |val r = p2.age | ||
| """.evals("r" to 1) | ||
| } | ||
|
|
||
| @Test | ||
| fun `missing field should not create`() { | ||
| """ | ||
| |interface Person { | ||
| | val name: String | ||
| |} | ||
| |data class Person1(override val name: String, val age: Int): Person | ||
| |data class Person2(override val name: String, val age: Int): Person | ||
| | | ||
| |val p1 = Person1("Alex", 1) | ||
| |val p2 = Person2(p1) | ||
| |val r = p2.age | ||
| """.failsWith { it.contains("No value passed for parameter") } | ||
| } | ||
| } |