index occurrences of superclass names for Kotlin classes

idea/src/META-INF/plugin.xml

@@ -175,6 +175,7 @@
       <stubIndex implementation="org.jetbrains.jet.plugin.stubindex.JetShortFunctionNameIndex"/>
       <stubIndex implementation="org.jetbrains.jet.plugin.stubindex.JetExtensionFunctionNameIndex"/>
       <stubIndex implementation="org.jetbrains.jet.plugin.stubindex.JetAllShortFunctionNameIndex"/>
+      <stubIndex implementation="org.jetbrains.jet.plugin.stubindex.JetSuperClassIndex"/>
 
       <contentBasedClassFileProcessor implementation="org.jetbrains.jet.plugin.libraries.JetContentBasedFileSubstitutor" />
       <psi.clsCustomNavigationPolicy implementation="org.jetbrains.jet.plugin.libraries.JetClsNavigationPolicy" />

idea/src/org/jetbrains/jet/plugin/stubindex/JetIndexKeys.java

@@ -25,6 +25,7 @@ import org.jetbrains.jet.lang.psi.JetNamedFunction;
  */
 public interface JetIndexKeys {
     StubIndexKey<String, JetClassOrObject> SHORT_NAME_KEY = StubIndexKey.createIndexKey("jet.class.shortName");
+    StubIndexKey<String, JetClassOrObject> SUPERCLASS_NAME_KEY = StubIndexKey.createIndexKey("jet.class.superClassName");
     StubIndexKey<String, JetClassOrObject> FQN_KEY = StubIndexKey.createIndexKey("jet.fqn");
 
     StubIndexKey<String, JetNamedFunction> TOP_LEVEL_FUNCTION_SHORT_NAME_KEY = StubIndexKey.createIndexKey("jet.top.level.function.short.name");

idea/src/org/jetbrains/jet/plugin/stubindex/JetSuperClassIndex.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2010-2012 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.jet.plugin.stubindex;
+
+import com.intellij.openapi.project.Project;
+import com.intellij.psi.search.GlobalSearchScope;
+import com.intellij.psi.stubs.StringStubIndexExtension;
+import com.intellij.psi.stubs.StubIndexKey;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.jet.lang.psi.JetClassOrObject;
+
+import java.util.Collection;
+
+/**
+ * @author yole
+ */
+public class JetSuperClassIndex extends StringStubIndexExtension<JetClassOrObject> {
+    private static final JetSuperClassIndex ourInstance = new JetSuperClassIndex();
+    public static JetSuperClassIndex getInstance() {
+        return ourInstance;
+    }
+
+    @NotNull
+    @Override
+    public StubIndexKey<String, JetClassOrObject> getKey() {
+        return JetIndexKeys.SUPERCLASS_NAME_KEY;
+    }
+
+    @Override
+    public Collection<JetClassOrObject> get(final String s, final Project project, @NotNull final GlobalSearchScope scope) {
+        return super.get(s, project, new JetSourceFilterScope(scope));
+    }
+}

idea/src/org/jetbrains/jet/plugin/stubindex/StubIndexServiceImpl.java

@@ -37,6 +37,10 @@ public class StubIndexServiceImpl implements StubIndexService {
         if (fqn != null) {
             sink.occurrence(JetIndexKeys.FQN_KEY, fqn);
         }
+
+        for (String superName : stub.getSuperNames()) {
+            sink.occurrence(JetIndexKeys.SUPERCLASS_NAME_KEY, superName);
+        }
     }
 
     @Override

idea/tests/org/jetbrains/jet/plugin/stubs/JetStubsTest.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2010-2012 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.jet.plugin.stubs;
+
+import com.intellij.psi.PsiFile;
+import com.intellij.testFramework.LightProjectDescriptor;
+import com.intellij.testFramework.fixtures.LightCodeInsightFixtureTestCase;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.jet.lang.psi.JetClass;
+import org.jetbrains.jet.lang.psi.JetDeclaration;
+import org.jetbrains.jet.lang.psi.JetFile;
+import org.jetbrains.jet.lang.psi.stubs.PsiJetClassStub;
+import org.jetbrains.jet.lang.psi.stubs.elements.JetStubElementTypes;
+import org.jetbrains.jet.plugin.JetLightProjectDescriptor;
+
+import java.util.List;
+
+/**
+ * @author yole
+ */
+public class JetStubsTest extends LightCodeInsightFixtureTestCase {
+    @NotNull
+    @Override
+    protected LightProjectDescriptor getProjectDescriptor() {
+        return JetLightProjectDescriptor.INSTANCE;
+    }
+
+    public void testSuperclassNames() {
+        final PsiFile psiFile = myFixture.configureByText("foo.kt", "import java.util.ArrayList as alist\nclass C(): alist() { }");
+        final List<JetDeclaration> declarations = ((JetFile) psiFile).getDeclarations();
+        final JetClass jetClass = (JetClass) declarations.get(0);
+        final PsiJetClassStub stub = JetStubElementTypes.CLASS.createStub(jetClass, null);
+        final List<String> names = stub.getSuperNames();
+        assertSameElements(names, "ArrayList", "alist");
+    }
+}