Extract interface out of JavaTypeParameter

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/structure/JavaClassifierImpl.java

@@ -34,7 +34,7 @@ public abstract class JavaClassifierImpl extends JavaElementImpl implements Java
     @NotNull
     /* package */ static JavaClassifier create(@NotNull PsiClass psiClass) {
         if (psiClass instanceof PsiTypeParameter) {
-            return new JavaTypeParameter((PsiTypeParameter) psiClass);
+            return new JavaTypeParameterImpl((PsiTypeParameter) psiClass);
         }
         else {
             return new JavaClass(psiClass);

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/structure/JavaElementCollectionFromPsiArrayUtil.java

@@ -84,7 +84,7 @@ public class JavaElementCollectionFromPsiArrayUtil {
         if (typeParameters.length == 0) return Collections.emptyList();
         List<JavaTypeParameter> result = new ArrayList<JavaTypeParameter>(typeParameters.length);
         for (PsiTypeParameter psiTypeParameter : typeParameters) {
-            result.add(new JavaTypeParameter(psiTypeParameter));
+            result.add(new JavaTypeParameterImpl(psiTypeParameter));
         }
         return result;
     }

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/structure/JavaTypeParameter.java

@@ -16,63 +16,25 @@
 
 package org.jetbrains.jet.lang.resolve.java.structure;
 
-import com.intellij.psi.PsiClass;
-import com.intellij.psi.PsiMethod;
 import com.intellij.psi.PsiTypeParameter;
-import com.intellij.psi.PsiTypeParameterListOwner;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
-import org.jetbrains.jet.lang.resolve.name.Name;
 
 import java.util.Collection;
 
-import static org.jetbrains.jet.lang.resolve.java.structure.JavaElementCollectionFromPsiArrayUtil.classifierTypes;
-
-public class JavaTypeParameter extends JavaClassifierImpl implements JavaNamedElement {
-    public JavaTypeParameter(@NotNull PsiTypeParameter psiTypeParameter) {
-        super(psiTypeParameter);
-    }
-
+public interface JavaTypeParameter extends JavaClassifier, JavaNamedElement {
     @NotNull
     @Override
-    public PsiTypeParameter getPsi() {
-        return (PsiTypeParameter) super.getPsi();
-    }
+    PsiTypeParameter getPsi();
 
-    public int getIndex() {
-        return getPsi().getIndex();
-    }
+    int getIndex();
 
     @NotNull
-    @Override
-    public Name getName() {
-        return Name.identifier(getPsi().getName());
-    }
-
-    @NotNull
-    public Collection<JavaClassifierType> getUpperBounds() {
-        return classifierTypes(getPsi().getExtendsList().getReferencedTypes());
-    }
+    Collection<JavaClassifierType> getUpperBounds();
 
     @Nullable
-    public JavaTypeParameterListOwner getOwner() {
-        PsiTypeParameterListOwner owner = getPsi().getOwner();
-        // TODO: a separate factory for such things
-        if (owner instanceof PsiMethod) {
-            return new JavaMethodImpl((PsiMethod) owner);
-        }
-        else if (owner instanceof PsiClass) {
-            return new JavaClass((PsiClass) owner);
-        }
-        else if (owner != null) {
-            throw new UnsupportedOperationException("Unsupported type parameter list owner: " + owner);
-        }
-
-        return null;
-    }
+    JavaTypeParameterListOwner getOwner();
 
     @NotNull
-    public JavaTypeProvider getTypeProvider() {
-        return new JavaTypeProvider(getPsi().getManager());
-    }
+    JavaTypeProvider getTypeProvider();
 }

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/structure/JavaTypeParameterImpl.java

@@ -0,0 +1,82 @@
+/*
+ * 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.lang.resolve.java.structure;
+
+import com.intellij.psi.PsiClass;
+import com.intellij.psi.PsiMethod;
+import com.intellij.psi.PsiTypeParameter;
+import com.intellij.psi.PsiTypeParameterListOwner;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.jetbrains.jet.lang.resolve.name.Name;
+
+import java.util.Collection;
+
+import static org.jetbrains.jet.lang.resolve.java.structure.JavaElementCollectionFromPsiArrayUtil.classifierTypes;
+
+public class JavaTypeParameterImpl extends JavaClassifierImpl implements JavaTypeParameter {
+    public JavaTypeParameterImpl(@NotNull PsiTypeParameter psiTypeParameter) {
+        super(psiTypeParameter);
+    }
+
+    @NotNull
+    @Override
+    public PsiTypeParameter getPsi() {
+        return (PsiTypeParameter) super.getPsi();
+    }
+
+    @Override
+    public int getIndex() {
+        return getPsi().getIndex();
+    }
+
+    @NotNull
+    @Override
+    public Name getName() {
+        return Name.identifier(getPsi().getName());
+    }
+
+    @Override
+    @NotNull
+    public Collection<JavaClassifierType> getUpperBounds() {
+        return classifierTypes(getPsi().getExtendsList().getReferencedTypes());
+    }
+
+    @Override
+    @Nullable
+    public JavaTypeParameterListOwner getOwner() {
+        PsiTypeParameterListOwner owner = getPsi().getOwner();
+        // TODO: a separate factory for such things
+        if (owner instanceof PsiMethod) {
+            return new JavaMethodImpl((PsiMethod) owner);
+        }
+        else if (owner instanceof PsiClass) {
+            return new JavaClass((PsiClass) owner);
+        }
+        else if (owner != null) {
+            throw new UnsupportedOperationException("Unsupported type parameter list owner: " + owner);
+        }
+
+        return null;
+    }
+
+    @Override
+    @NotNull
+    public JavaTypeProvider getTypeProvider() {
+        return new JavaTypeProvider(getPsi().getManager());
+    }
+}

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/structure/JavaTypeSubstitutor.java

@@ -75,7 +75,7 @@ public class JavaTypeSubstitutor {
             substitutionMap = new HashMap<JavaTypeParameter, JavaType>();
             for (Map.Entry<PsiTypeParameter, PsiType> entry : psiMap.entrySet()) {
                 PsiType value = entry.getValue();
-                substitutionMap.put(new JavaTypeParameter(entry.getKey()), value == null ? null : JavaTypeImpl.create(value));
+                substitutionMap.put(new JavaTypeParameterImpl(entry.getKey()), value == null ? null : JavaTypeImpl.create(value));
             }
         }