[api] IJPL-188257: Allow parsing API to a list of structured strings

GitOrigin-RevId: d148335af9ae4a68f94db5042f73b4f8cad73f00

tools/apiDump/src/printer.kt

@@ -7,10 +7,27 @@ import java.io.PrintWriter
 import java.io.StringWriter
 
 fun dumpApi(classSignatures: List<ApiClass>): String {
-  return StringWriter().use {
+  return reifyToString { dumpApi(classSignatures) }
-    PrintWriter(it).use { printer ->
-      printer.dumpApi(classSignatures)
 }
+
+typealias ClassName = String
+typealias ClassMembers = List<String>
+
+fun dumpApiAndGroupByClasses(classSignatures: List<ApiClass>): Map<ClassName, ClassMembers> {
+  val collectingMap = mutableMapOf<ClassName, ClassMembers>()
+  for (signature in classSignatures) {
+    val header = reifyToString { printClassHeader(signature.className, signature.flags) }
+    val list = ArrayList<String>(signature.supers.size + signature.members.size)
+    signature.supers.mapTo(list) { `super` -> reifyToString { printSuper(`super`) } }
+    signature.members.mapTo(list) { member -> reifyToString { printMember(member) } }
+    collectingMap[header] = list
+  }
+  return collectingMap
+}
+
+private fun reifyToString(action: PrintWriter.() -> Unit): String {
+  return StringWriter().use {
+    PrintWriter(it).use { printer -> printer.action() }
     it.buffer.toString()
   }
 }
@@ -18,8 +35,15 @@ fun dumpApi(classSignatures: List<ApiClass>): String {
 fun PrintWriter.dumpApi(classSignatures: List<ApiClass>) {
   for (classData in classSignatures) {
     printClassHeader(classData.className, classData.flags)
-    printSupers(classData.supers)
+    printNewLine()
-    printMembers(classData.members)
+    for (`super` in classData.supers) {
+      printSuper(`super`)
+      printNewLine()
+    }
+    for (member in classData.members) {
+      printMember(member)
+      printNewLine()
+    }
   }
 }
 
@@ -28,19 +52,14 @@ private fun PrintWriter.printClassHeader(className: String, flags: ApiFlags) {
     print(":")
   }
   print(className.dottedClassName())
-  printNewLine()
 }
 
-private fun PrintWriter.printSupers(supers: List<String>) {
+private fun PrintWriter.printSuper(`super`: String) {
-  for (`super` in supers) {
   print("- ")
   print(`super`.dottedClassName())
-    printNewLine()
-  }
 }
 
-private fun PrintWriter.printMembers(members: List<ApiMember>) {
+private fun PrintWriter.printMember(member: ApiMember) {
-  for (member in members) {
   print("- ")
   if (printFlags(member.flags, false)) {
     print(":")
@@ -56,8 +75,6 @@ private fun PrintWriter.printMembers(members: List<ApiMember>) {
     print(':')
     print(type.typeString())
   }
-    printNewLine()
-  }
 }
 
 private fun PrintWriter.printNewLine() {