jps/model-api/src/org/jetbrains/jps/service/JpsServiceManager.java

/*
 * 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 org.jetbrains.jps.service;

import java.util.ServiceLoader;

/**
 * @author nik
 */
public abstract class JpsServiceManager {
  public static JpsServiceManager getInstance() {
    return InstanceHolder.INSTANCE;
  }

  public abstract <T> T getService(Class<T> serviceClass);

  public abstract <T> Iterable<T> getExtensions(Class<T> extensionClass);

  private static class InstanceHolder {
    private static final JpsServiceManager INSTANCE;

    static {
      INSTANCE = ServiceLoader.load(JpsServiceManager.class, JpsServiceManager.class.getClassLoader()).iterator().next();
    }
  }
}