Using light PsiTypeParameters instead of building a stub:

This is needed when Java resolved references to Kotlin classes: in order to resolve a reference it needs to know type parameters

compiler/jet.as.java.psi/src/org/jetbrains/jet/asJava/KotlinLightClassForExplicitDeclaration.java

@@ -22,11 +22,13 @@ import com.intellij.navigation.ItemPresentation;
 import com.intellij.navigation.ItemPresentationProviders;
 import com.intellij.openapi.util.Comparing;
 import com.intellij.openapi.util.Key;
+import com.intellij.openapi.util.NullableLazyValue;
 import com.intellij.openapi.util.Pair;
 import com.intellij.psi.*;
 import com.intellij.psi.impl.java.stubs.PsiJavaFileStub;
 import com.intellij.psi.impl.light.AbstractLightClass;
 import com.intellij.psi.impl.light.LightModifierList;
+import com.intellij.psi.impl.light.LightTypeParameterListBuilder;
 import com.intellij.psi.util.CachedValue;
 import com.intellij.psi.util.CachedValuesManager;
 import com.intellij.util.IncorrectOperationException;
@@ -67,6 +69,25 @@ public class KotlinLightClassForExplicitDeclaration extends AbstractLightClass i
     @Nullable
     private PsiModifierList modifierList;
 
+    private NullableLazyValue<PsiTypeParameterList> typeParameterList = new NullableLazyValue<PsiTypeParameterList>() {
+        @Nullable
+        @Override
+        protected PsiTypeParameterList compute() {
+            LightTypeParameterListBuilder builder = new LightTypeParameterListBuilder(getManager(), getLanguage());
+            if (classOrObject instanceof JetTypeParameterListOwner) {
+                JetTypeParameterListOwner typeParameterListOwner = (JetTypeParameterListOwner) classOrObject;
+                List<JetTypeParameter> parameters = typeParameterListOwner.getTypeParameters();
+                for (int i = 0; i < parameters.size(); i++) {
+                    JetTypeParameter jetTypeParameter = parameters.get(i);
+                    String name = jetTypeParameter.getName();
+                    String safeName = name == null ? "__no_name__" : name;
+                    builder.addParameter(new KotlinLightTypeParameter(KotlinLightClassForExplicitDeclaration.this, i, safeName));
+                }
+            }
+            return builder;
+        }
+    };
+
     private KotlinLightClassForExplicitDeclaration(
             @NotNull PsiManager manager,
             @NotNull FqName name,
@@ -180,6 +201,19 @@ public class KotlinLightClassForExplicitDeclaration extends AbstractLightClass i
         return super.getContainingClass();
     }
 
+    @Nullable
+    @Override
+    public PsiTypeParameterList getTypeParameterList() {
+        return typeParameterList.getValue();
+    }
+
+    @NotNull
+    @Override
+    public PsiTypeParameter[] getTypeParameters() {
+        PsiTypeParameterList typeParameterList = getTypeParameterList();
+        return typeParameterList == null ? PsiTypeParameter.EMPTY_ARRAY : typeParameterList.getTypeParameters();
+    }
+
     @Nullable
     @Override
     public String getName() {

compiler/jet.as.java.psi/src/org/jetbrains/jet/asJava/KotlinLightTypeParameter.java

@@ -0,0 +1,106 @@
+/*
+ * Copyright 2010-2013 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.asJava;
+
+import com.intellij.psi.*;
+import com.intellij.psi.impl.light.AbstractLightClass;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.jetbrains.jet.plugin.JetLanguage;
+
+public class KotlinLightTypeParameter extends AbstractLightClass implements PsiTypeParameter {
+
+    private final KotlinLightClassForExplicitDeclaration lightClass;
+    private final int index;
+    private final String name;
+
+    protected KotlinLightTypeParameter(
+            @NotNull KotlinLightClassForExplicitDeclaration lightClass,
+            int index,
+            @NotNull String name) {
+        super(lightClass.getManager(), JetLanguage.INSTANCE);
+        this.lightClass = lightClass;
+        this.index = index;
+        this.name = name;
+    }
+
+    @NotNull
+    @Override
+    public PsiTypeParameter getDelegate() {
+        return lightClass.getDelegate().getTypeParameters()[index];
+    }
+
+    @NotNull
+    @Override
+    public PsiElement copy() {
+        return new KotlinLightTypeParameter(lightClass, index, name);
+    }
+
+    @Override
+    public void accept(@NotNull final PsiElementVisitor visitor) {
+        if (visitor instanceof JavaElementVisitor) {
+            ((JavaElementVisitor) visitor).visitTypeParameter(this);
+        }
+        else {
+            super.accept(visitor);
+        }
+    }
+
+    @Nullable
+    @Override
+    public String getName() {
+        return name;
+    }
+
+    @Override
+    public PsiTypeParameterListOwner getOwner() {
+        return lightClass;
+    }
+
+    @Override
+    public int getIndex() {
+        return index;
+    }
+
+    @NotNull
+    @Override
+    public PsiAnnotation[] getAnnotations() {
+        return getDelegate().getAnnotations();
+    }
+
+    @NotNull
+    @Override
+    public PsiAnnotation[] getApplicableAnnotations() {
+        return getDelegate().getApplicableAnnotations();
+    }
+
+    @Override
+    public PsiAnnotation findAnnotation(@NotNull final String qualifiedName) {
+        return getDelegate().findAnnotation(qualifiedName);
+    }
+
+    @NotNull
+    @Override
+    public PsiAnnotation addAnnotation(@NotNull final String qualifiedName) {
+        return getDelegate().addAnnotation(qualifiedName);
+    }
+
+    @Override
+    public String toString() {
+        return "KotlinLightTypeParameter:" + getName();
+    }
+}