/*
 * Copyright 2000-2012 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 com.intellij.openapi.roots.impl.libraries;

import com.intellij.openapi.components.ServiceManager;
import com.intellij.openapi.roots.impl.RootProviderBaseImpl;

/**
 * @author yole
 */
public class JarDirectoryWatcherFactory {
  public static JarDirectoryWatcherFactory getInstance() {
    final JarDirectoryWatcherFactory factory = ServiceManager.getService(JarDirectoryWatcherFactory.class);
    return factory != null ? factory : new JarDirectoryWatcherFactory();
  }

  public JarDirectoryWatcher createWatcher(JarDirectories jarDirectories, RootProviderBaseImpl rootProvider) {
    return new JarDirectoryWatcher() {
      @Override
      public void updateWatchedRoots() {
      }

      @Override
      public void dispose() {
      }
    };
  }
}

@@ -829,16 +829,112 @@
 ctory %7B%0A
+  private static final JarDirectoryWatcherFactory Instance = new JarDirectoryWatcherFactory();%0A%0A
   public
@@ -1135,40 +1135,16 @@
 y : 
-new JarDirectoryWatcherFactory()
+Instance
 ;%0A  

use single instance for base factory