Created
May 5, 2022 14:06
-
-
Save adibfara/d8ed207f9c6d904904a0743918a7ea11 to your computer and use it in GitHub Desktop.
Completing the processor
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
internal class ListedProcessor( | |
private val environment: SymbolProcessorEnvironment, | |
) : SymbolProcessor { | |
private fun Resolver.findAnnotations( | |
kClass: KClass<*>, | |
) = getSymbolsWithAnnotation( | |
kClass.qualifiedName.toString()) | |
.filterIsInstance<KSFunctionDeclaration>().filter { | |
it.parameters.isEmpty() | |
} | |
override fun process(resolver: Resolver): List<KSAnnotated> { | |
val listedFunctions: Sequence<KSFunctionDeclaration> = | |
resolver.findAnnotations(Listed::class) | |
if(!listedFunctions.iterator().hasNext()) return emptyList() | |
// gathering the required imports | |
val imports = listedFunctions.mapNotNull { it.qualifiedName?.asString() }.toSet() | |
// group functions based on their given list-name | |
val lists = listedFunctions.groupBy { it.annotations.first { it.shortName.asString() == "Listed" }.arguments.first().value.toString() } | |
val sourceFiles = listedFunctions.mapNotNull { it.containingFile } | |
val fileText = buildString { | |
append("package your.desired.packagename") | |
newLine() | |
newLine() | |
imports.forEach { | |
append("import $it") | |
newLine() | |
} | |
newLine() | |
lists.forEach { (listName, functions) -> | |
val functionNames = functions.map { it.simpleName.asString() + "()" }.joinToString(", ") | |
append("val $listName = listOf($functionNames)") | |
newLine() | |
} | |
} | |
createFileWithText(sourceFiles, fileText) | |
return (listedFunctions).filterNot { it.validate() }.toList() | |
} | |
private fun createFileWithText( | |
sourceFiles: Sequence<KSFile>, | |
fileText: String, | |
) { | |
val file = environment.codeGenerator.createNewFile( | |
Dependencies( | |
false, | |
*sourceFiles.toList().toTypedArray(), | |
), | |
"your.generated.file.package", | |
"GeneratedLists" | |
) | |
file.write(fileText.toByteArray()) | |
} | |
private fun StringBuilder.newLine(count: Int = 1) { | |
repeat(count){ | |
append("\n") | |
} | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment