delegate to ClsStubBuilder for inner class identification

java/java-psi-impl/src/com/intellij/psi/impl/compiled/ClassFileStubBuilder.java

@@ -40,7 +40,13 @@ public class ClassFileStubBuilder implements BinaryFileStubBuilder {
 
   @Override
   public boolean acceptsFile(final VirtualFile file) {
-    return !ClassFileViewProvider.isInnerClass(file);
+    final ClsStubBuilderFactory[] factories = Extensions.getExtensions(ClsStubBuilderFactory.EP_NAME);
+    for (ClsStubBuilderFactory factory : factories) {
+      if (!factory.isInnerClass(file)) {
+        return true;
+      }
+    }
+    return false;
   }
 
   @Override

java/java-psi-impl/src/com/intellij/psi/impl/compiled/DefaultClsStubBuilderFactory.java

@@ -18,6 +18,7 @@ package com.intellij.psi.impl.compiled;
 import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.util.Comparing;
 import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.psi.ClassFileViewProvider;
 import com.intellij.psi.PsiClass;
 import com.intellij.psi.impl.java.stubs.PsiClassStub;
 import com.intellij.psi.impl.java.stubs.impl.PsiJavaFileStubImpl;
@@ -68,16 +69,7 @@ public class DefaultClsStubBuilderFactory extends ClsStubBuilderFactory {
 
   @Override
   public boolean isInnerClass(VirtualFile file) {
-    String name = file.getNameWithoutExtension();
-    int len = name.length();
-    int idx = name.indexOf('$');
-
-    while (idx > 0) {
-      if (idx + 1 < len && Character.isDigit(name.charAt(idx + 1))) return true;
-      idx = name.indexOf('$', idx + 1);
-    }
-
-    return false;
+    return ClassFileViewProvider.isInnerClass(file);
   }
 
   private static class VirtualFileInnerClassStrategy implements InnerClassSourceStrategy<VirtualFile> {