/*
 * Copyright 2003-2012 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 jetbrains.mps.smodel.structure;

public interface Extension<T> {

  String getExtensionPointId();

  T get();

  void activate();

  void deactivate();

  abstract class Default<T> implements Extension<T> {

    private final String myExtensionPointId;

    public Default(String extensionPointId) {
      myExtensionPointId = extensionPointId;
    }

    @Override
    public String getExtensionPointId() {
      return myExtensionPointId;
    }

    @Override
    public void activate() {
    }

    @Override
    public void deactivate() {
    }
  }

}
