Supported Java usages in automatic variable renamer.

idea/src/META-INF/plugin.xml

@@ -306,6 +306,7 @@
     <renameHandler implementation="org.jetbrains.kotlin.idea.refactoring.rename.RenameDynamicMemberHandler"/>
     <renameHandler implementation="org.jetbrains.kotlin.idea.refactoring.rename.RenameOnSecondaryConstructorHandler"/>
     <automaticRenamerFactory implementation="org.jetbrains.kotlin.idea.refactoring.rename.AutomaticVariableRenamerFactory"/>
+    <automaticRenamerFactory implementation="org.jetbrains.kotlin.idea.refactoring.rename.AutomaticVariableInJavaRenamerFactory"/>
     <automaticRenamerFactory implementation="org.jetbrains.kotlin.idea.refactoring.rename.AutomaticInheritorRenamerFactory"/>
     <automaticRenamerFactory implementation="org.jetbrains.kotlin.idea.refactoring.rename.AutomaticOverloadsRenamerFactory"/>
 

idea/src/org/jetbrains/kotlin/idea/refactoring/rename/AutomaticVariableRenamer.kt

@@ -25,6 +25,8 @@ import com.intellij.refactoring.RefactoringBundle
 import com.intellij.refactoring.rename.naming.AutomaticRenamer
 import com.intellij.refactoring.rename.naming.AutomaticRenamerFactory
 import com.intellij.usageView.UsageInfo
+import org.jetbrains.kotlin.asJava.LightClassUtil
+import org.jetbrains.kotlin.asJava.toLightClass
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.VariableDescriptor
@@ -37,6 +39,7 @@ import org.jetbrains.kotlin.psi.psiUtil.isAncestor
 import org.jetbrains.kotlin.resolve.DescriptorUtils
 import org.jetbrains.kotlin.types.JetType
 import java.util.ArrayList
+import java.util.LinkedHashMap
 
 public class AutomaticVariableRenamer(klass: JetClass, newClassName: String, usages: Collection<UsageInfo>) : AutomaticRenamer() {
     private val toUnpluralize = ArrayList<JetNamedDeclaration>()
@@ -107,5 +110,18 @@ public class AutomaticVariableRenamerFactory: AutomaticRenamerFactory {
     override fun isEnabled() = JavaRefactoringSettings.getInstance().isToRenameVariables()
     override fun setEnabled(enabled: Boolean) = JavaRefactoringSettings.getInstance().setRenameVariables(enabled)
 
+    override fun getOptionName() = RefactoringBundle.message("rename.variables")
+}
+
+public class AutomaticVariableInJavaRenamerFactory: AutomaticRenamerFactory {
+    override fun isApplicable(element: PsiElement) = element is JetClass && element.toLightClass() != null
+
+    override fun createRenamer(element: PsiElement, newName: String, usages: Collection<UsageInfo>) =
+            // Using java variable renamer for java usages
+            com.intellij.refactoring.rename.naming.AutomaticVariableRenamer((element as JetClass).toLightClass()!!, newName, usages)
+
+    override fun isEnabled() = JavaRefactoringSettings.getInstance().isToRenameVariables()
+    override fun setEnabled(enabled: Boolean) = JavaRefactoringSettings.getInstance().setRenameVariables(enabled)
+
     override fun getOptionName() = RefactoringBundle.message("rename.variables")
 }

idea/testData/refactoring/rename/automaticRenamer/after/javaUsage.java

@@ -1,3 +1,9 @@
 class JavaBar extends Bar {
 
+}
+
+class Usage {
+    public static void main(String[] args) {
+        Bar bar = null;
+    }
 }

idea/testData/refactoring/rename/automaticRenamer/before/javaUsage.java

@@ -1,3 +1,9 @@
 class JavaFoo extends Foo {
 
+}
+
+class Usage {
+    public static void main(String[] args) {
+        Foo foo = null;
+    }
 }