Annotation processors in Kotlin

build.gradle

@@ -3,6 +3,7 @@ import org.gradle.internal.jvm.Jvm
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
+    ext.kotlin_version = '1.1.1'
     repositories {
         jcenter()
     }
@@ -16,6 +17,9 @@ buildscript {
         // https://github.com/palantir/gradle-jacoco-coverage
         classpath 'com.palantir:jacoco-coverage:0.2.0'
 
+        // Kotlin
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }
@@ -50,6 +54,7 @@ ext.libraries = [
         // Core libraries
         supportAnnotations             : 'com.android.support:support-annotations:' + supportLibsVersion,
         rxJava                         : 'io.reactivex:rxjava:1.2.1',
+        kotlinStdLib                   : "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version",
 
         // Parts of StorIO
         storIOCommon                              : project(':storio-common'),
@@ -67,6 +72,7 @@ ext.libraries = [
         assertJ                        : 'org.assertj:assertj-core:3.6.2',
         assertJAndroid                 : 'com.squareup.assertj:assertj-android:1.1.1',
         mockitoCore                    : 'org.mockito:mockito-core:2.7.19',
+        mockitoKotlin                  : 'com.nhaarman:mockito-kotlin:1.4.0',
 
         equalsVerifier                 : 'nl.jqno.equalsverifier:equalsverifier:1.7.2',
         privateConstructorChecker      : 'com.pushtorefresh.java-private-constructor-checker:checker:1.1.0',

storio-common-annotations-processor/build.gradle

@@ -1,18 +1,22 @@
-apply plugin: 'java'
-
-targetCompatibility = '1.6'
-sourceCompatibility = '1.6'
+apply plugin: 'kotlin'
 
 dependencies {
     compile libraries.intellijAnnotations
     compile libraries.autoService
     compile libraries.javaPoet
+    compile libraries.kotlinStdLib
 
     testCompile libraries.junit
     testCompile libraries.assertJ
-    testCompile libraries.mockitoCore
+    testCompile libraries.mockitoKotlin
     testCompile libraries.equalsVerifier
 }
 
+
+sourceSets {
+    main.java.srcDirs += 'src/main/kotlin'
+    test.java.srcDir 'src/test/kotlin'
+}
+
 apply from: '../gradle/publish-java-lib.gradle'
-apply from: '../gradle/jacoco-non-android.gradle'
+apply from: '../gradle/jacoco-non-android.gradle'