Gradle plugin: fix compatibility with android-gradle plugin 2.0.0-alpha5

#KT-10676 Fixed

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinPlugin.kt

@@ -399,7 +399,7 @@ open class KotlinAndroidPlugin @Inject constructor(val scriptHandler: ScriptHand
             // getJavaSources should return the Java sources used for compilation
             // We want to collect only generated files, like R-class output dir
             // Actual java sources will be collected later
-            val additionalSourceFiles = variantData.getJavaSources().filterIsInstance(javaClass<File>())
+            val additionalSourceFiles = AndroidGradleWrapper.getGeneratedSourceDirs(variantData)
             for (file in additionalSourceFiles) {
                 kotlinTask.source(file)
                 logger.kotlinDebug("Source directory with generated files ${file.getAbsolutePath()} was added to kotlin source for $kotlinTaskName")

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/android/AndroidGradleWrapper.groovy

@@ -7,6 +7,7 @@ import com.android.build.gradle.api.ApkVariant
 import com.android.build.gradle.api.BaseVariant
 import com.android.build.gradle.api.TestVariant
 import com.android.build.gradle.internal.VariantManager
+import com.android.build.gradle.internal.variant.BaseVariantData
 import org.gradle.api.internal.DefaultDomainObjectSet
 import org.gradle.api.tasks.compile.AbstractCompile
 import org.gradle.api.tasks.util.PatternFilterable
@@ -102,4 +103,37 @@ class AndroidGradleWrapper {
   static def VariantManager getVariantDataManager(BasePlugin plugin) {
     return plugin.getVariantManager()
   }
+
+  static def List<File> getGeneratedSourceDirs(BaseVariantData variantData) {
+    def getJavaSourcesMethod = variantData.getMetaClass().getMetaMethod("getJavaSources")
+    if (getJavaSourcesMethod.returnType.metaClass == Object[].metaClass) {
+      return variantData.getJavaSources().findAll { it instanceof File }
+    }
+    else {
+      def result = new ArrayList<File>()
+
+      if (variantData.scope.getGenerateRClassTask() != null) {
+        result.add(variantData.scope.getRClassSourceOutputDir());
+      }
+
+      if (variantData.scope.getGenerateBuildConfigTask() != null) {
+        result.add(variantData.scope.getBuildConfigSourceOutputDir());
+      }
+
+      if (variantData.scope.getAidlCompileTask() != null) {
+        result.add(variantData.scope.getAidlSourceOutputDir());
+      }
+
+      if (variantData.scope.getGlobalScope().getExtension().getDataBinding().isEnabled()) {
+        result.add(variantData.scope.getClassOutputForDataBinding());
+      }
+
+      if (!variantData.variantConfiguration.getRenderscriptNdkModeEnabled()
+              && variantData.scope.getRenderscriptCompileTask() != null) {
+        result.add(variantData.scope.getRenderscriptSourceOutputDir());
+      }
+
+      return result
+    }
+  }
 }