/*
 * Copyright 2000-2014 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.components.impl.stores;

import com.intellij.openapi.components.StateStorage;
import com.intellij.openapi.components.StateStorageException;
import com.intellij.openapi.util.Pair;
import com.intellij.openapi.vfs.VirtualFile;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.io.IOException;
import java.util.Collection;
import java.util.List;
import java.util.Set;

public interface IComponentStore {
  void initComponent(@NotNull Object component);

  void reinitComponents(@NotNull Set<String> componentNames, boolean reloadData);

  @NotNull
  Collection<String> getNotReloadableComponents(@NotNull Collection<String> componentNames);

  boolean isReloadPossible(@NotNull Set<String> componentNames);

  void load() throws IOException, StateStorageException;

  @NotNull
  StateStorageManager getStateStorageManager();

  class SaveCancelledException extends RuntimeException {
    public SaveCancelledException() {
    }

    public SaveCancelledException(final String s) {
      super(s);
    }
  }

  void save(@NotNull List<Pair<StateStorage.SaveSession, VirtualFile>> readonlyFiles);

  interface Reloadable extends IComponentStore {
    /**
     * null if reloaded
     * empty list if nothing to reload
     * list of not reloadable components (reload is not performed)
     */
    @Nullable
    Collection<String> reload(@NotNull Collection<? extends StateStorage> changedStorages);
  }
}