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package com.android.codegen
import com.github.javaparser.ast.Modifier
import com.github.javaparser.ast.body.CallableDeclaration
import com.github.javaparser.ast.body.ClassOrInterfaceDeclaration
import com.github.javaparser.ast.body.TypeDeclaration
import com.github.javaparser.ast.expr.*
import com.github.javaparser.ast.type.ClassOrInterfaceType
/**
* [ClassInfo] + utilities for printing out new class code with proper indentation and imports
*/
class ClassPrinter(
classAst: ClassOrInterfaceDeclaration,
fileInfo: FileInfo
) : ClassInfo(classAst, fileInfo), Printer<ClassPrinter>, ImportsProvider {
val GENERATED_MEMBER_HEADER by lazy { "@$GeneratedMember" }
init {
val fieldsWithMissingNullablity = fields.filter { field ->
!field.isPrimitive
&& field.fieldAst.modifiers.none { it.keyword == Modifier.Keyword.TRANSIENT }
&& "@$Nullable" !in field.annotations
&& "@$NonNull" !in field.annotations
}
if (fieldsWithMissingNullablity.isNotEmpty()) {
abort("Non-primitive fields must have @$Nullable or @$NonNull annotation.\n" +
"Missing nullability annotations on: "
+ fieldsWithMissingNullablity.joinToString(", ") { it.name })
}
if (!classAst.isFinal &&
classAst.extendedTypes.any { it.nameAsString == Parcelable }) {
abort("Parcelable classes must be final")
}
}
val cliArgs get() = fileInfo.cliArgs
fun print() {
currentIndent = fileInfo.sourceLines
.find { "class $ClassName" in it }!!
.takeWhile { it.isWhitespace() }
.plus(INDENT_SINGLE)
+fileInfo.generatedWarning
if (FeatureFlag.CONST_DEFS()) generateConstDefs()
if (FeatureFlag.CONSTRUCTOR()) {
generateConstructor("public")
} else if (FeatureFlag.BUILDER()
|| FeatureFlag.COPY_CONSTRUCTOR()
|| FeatureFlag.WITHERS()) {
generateConstructor("/* package-private */")
}
if (FeatureFlag.COPY_CONSTRUCTOR()) generateCopyConstructor()
if (FeatureFlag.GETTERS()) generateGetters()
if (FeatureFlag.SETTERS()) generateSetters()
if (FeatureFlag.TO_STRING()) generateToString()
if (FeatureFlag.EQUALS_HASH_CODE()) generateEqualsHashcode()
if (FeatureFlag.FOR_EACH_FIELD()) generateForEachField()
if (FeatureFlag.WITHERS()) generateWithers()
if (FeatureFlag.PARCELABLE()) generateParcelable()
if (FeatureFlag.BUILDER() && FeatureFlag.BUILD_UPON()) generateBuildUpon()
if (FeatureFlag.BUILDER()) generateBuilder()
if (FeatureFlag.AIDL()) fileInfo.generateAidl() //TODO guard against nested classes requesting aidl
generateMetadata(fileInfo.file)
+"""
//@formatter:on
$GENERATED_END
"""
rmEmptyLine()
}
override var currentIndent: String
get() = fileInfo.currentIndent
set(value) { fileInfo.currentIndent = value }
override val stringBuilder get() = fileInfo.stringBuilder
val dataClassAnnotationFeatures = classAst.annotations
.find { it.nameAsString == DataClass }
?.let { it as? NormalAnnotationExpr }
?.pairs
?.map { pair -> pair.nameAsString to (pair.value as BooleanLiteralExpr).value }
?.toMap()
?: emptyMap()
val internalAnnotations = setOf(ParcelWith, DataClassEnum, PluralOf, UnsupportedAppUsage,
DataClassSuppressConstDefs)
val knownNonValidationAnnotations = internalAnnotations + Each + Nullable
/**
* @return whether the given feature is enabled
*/
operator fun FeatureFlag.invoke(): Boolean {
if (cliArgs.contains("--no-$kebabCase")) return false
if (cliArgs.contains("--$kebabCase")) return true
val annotationKey = "gen$upperCamelCase"
val annotationHiddenKey = "genHidden$upperCamelCase"
if (dataClassAnnotationFeatures.containsKey(annotationKey)) {
return dataClassAnnotationFeatures[annotationKey]!!
}
if (dataClassAnnotationFeatures.containsKey(annotationHiddenKey)) {
return dataClassAnnotationFeatures[annotationHiddenKey]!!
}
if (cliArgs.contains("--all")) return true
if (hidden) return true
return when (this) {
FeatureFlag.SETTERS ->
!FeatureFlag.CONSTRUCTOR() && !FeatureFlag.BUILDER() && fields.any { !it.isFinal }
FeatureFlag.BUILDER -> cliArgs.contains(FLAG_BUILDER_PROTECTED_SETTERS)
|| fields.any { it.hasDefault }
|| onByDefault
FeatureFlag.CONSTRUCTOR -> !FeatureFlag.BUILDER()
FeatureFlag.PARCELABLE -> "Parcelable" in superInterfaces
FeatureFlag.AIDL -> fileInfo.mainClass.nameAsString == ClassName && FeatureFlag.PARCELABLE()
FeatureFlag.IMPLICIT_NONNULL -> fields.any { it.isNullable }
&& fields.none { "@$NonNull" in it.annotations }
else -> onByDefault
}
}
val FeatureFlag.hidden: Boolean
get(): Boolean {
val annotationHiddenKey = "genHidden$upperCamelCase"
if (dataClassAnnotationFeatures.containsKey(annotationHiddenKey)) {
return dataClassAnnotationFeatures[annotationHiddenKey]!!
}
return when {
cliArgs.contains("--hidden-$kebabCase") -> true
this == FeatureFlag.BUILD_UPON -> FeatureFlag.BUILDER.hidden
else -> false
}
}
inline operator fun <R> invoke(f: ClassPrinter.() -> R): R = run(f)
var BuilderClass = CANONICAL_BUILDER_CLASS
var BuilderType = BuilderClass + genericArgs
val customBaseBuilderAst: ClassOrInterfaceDeclaration? by lazy {
nestedClasses.find { it.nameAsString == BASE_BUILDER_CLASS }
}
val suppressedMembers by lazy {
getSuppressedMembers(classAst)
}
val builderSuppressedMembers by lazy {
getSuppressedMembers(customBaseBuilderAst)
}
private fun getSuppressedMembers(clazz: ClassOrInterfaceDeclaration?): List<String> {
return clazz
?.annotations
?.find { it.nameAsString == DataClassSuppress }
?.as_<SingleMemberAnnotationExpr>()
?.memberValue
?.run {
when (this) {
is ArrayInitializerExpr -> values.map { it.asLiteralStringValueExpr().value }
is StringLiteralExpr -> listOf(value)
else -> abort("Can't parse annotation arg: $this")
}
}
?: emptyList()
}
fun isMethodGenerationSuppressed(name: String, vararg argTypes: String): Boolean {
return name in suppressedMembers || hasMethod(name, *argTypes)
}
fun hasMethod(name: String, vararg argTypes: String): Boolean {
val members: List<CallableDeclaration<*>> =
if (name == ClassName) classAst.constructors else classAst.methods
return members.any {
it.name.asString() == name &&
it.parameters.map { it.type.asString() } == argTypes.toList()
}
}
val lazyTransientFields = classAst.fields
.filter { it.isTransient && !it.isStatic }
.mapIndexed { i, node -> FieldInfo(index = i, fieldAst = node, classInfo = this) }
.filter { hasMethod("lazyInit${it.NameUpperCamel}") }
val extendsParcelableClass by lazy {
Parcelable !in superInterfaces && superClass != null
}
init {
val builderFactoryOverride = classAst.methods.find {
it.isStatic && it.nameAsString == "builder"
}
if (builderFactoryOverride != null) {
BuilderClass = (builderFactoryOverride.type as ClassOrInterfaceType).nameAsString
BuilderType = builderFactoryOverride.type.asString()
} else {
val builderExtension = classAst
.childNodes
.filterIsInstance(TypeDeclaration::class.java)
.find { it.nameAsString == CANONICAL_BUILDER_CLASS }
if (builderExtension != null) {
BuilderClass = BASE_BUILDER_CLASS
val tp = (builderExtension as ClassOrInterfaceDeclaration).typeParameters
BuilderType = if (tp.isEmpty()) BuilderClass
else "$BuilderClass<${tp.map { it.nameAsString }.joinToString(", ")}>"
}
}
}
}
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