Create abstract JavaElementFactory

Needed to wrap the logic of creation of elements/types, right now only array
types

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/DescriptorResolverUtils.java

@@ -176,7 +176,7 @@ public final class DescriptorResolverUtils {
         }
         else if (type instanceof JavaArrayType) {
             JavaType erasure = erasure(((JavaArrayType) type).getComponentType(), substitutor);
-            return erasure == null ? null : JavaArrayType.create(erasure);
+            return erasure == null ? null : JavaElementFactory.getInstance().createArrayType(erasure);
         }
         else if (type instanceof JavaWildcardType) {
             JavaWildcardType wildcardType = (JavaWildcardType) type;

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/kotlinSignature/PropagationHeuristics.java

@@ -213,7 +213,7 @@ class PropagationHeuristics {
 
         @NotNull
         private static JavaType varargToArray(@NotNull JavaType type, boolean isVararg) {
-            return isVararg ? JavaArrayType.create(((JavaArrayType) type).getComponentType()) : type;
+            return isVararg ? JavaElementFactory.getInstance().createArrayType(((JavaArrayType) type).getComponentType()) : type;
         }
 
         @NotNull

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

@@ -30,11 +30,6 @@ public class JavaArrayType extends JavaTypeImpl {
         return (PsiArrayType) super.getPsi();
     }
 
-    @NotNull
-    public static JavaArrayType create(@NotNull JavaType elementType) {
-        return new JavaArrayType(elementType.getPsi().createArrayType());
-    }
-
     @NotNull
     public JavaType getComponentType() {
         return JavaTypeImpl.create(getPsi().getComponentType());

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

@@ -0,0 +1,30 @@
+/*
+ * 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 org.jetbrains.annotations.NotNull;
+
+public abstract class JavaElementFactory {
+    @NotNull
+    public static JavaElementFactory getInstance() {
+        // TODO: ServiceLoader.load
+        return new JavaElementFactoryImpl();
+    }
+
+    @NotNull
+    public abstract JavaArrayType createArrayType(@NotNull JavaType elementType);
+}

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

@@ -0,0 +1,27 @@
+/*
+ * 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 org.jetbrains.annotations.NotNull;
+
+public class JavaElementFactoryImpl extends JavaElementFactory {
+    @NotNull
+    @Override
+    public JavaArrayType createArrayType(@NotNull JavaType elementType) {
+        return new JavaArrayType(elementType.getPsi().createArrayType());
+    }
+}