platform/platform-api/src/com/intellij/openapi/command/undo/DocumentReferenceManager.java

/*
 * Copyright 2000-2009 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.command.undo;

import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.vfs.VirtualFile;
import org.jetbrains.annotations.NotNull;

public abstract class DocumentReferenceManager {
  public static DocumentReferenceManager getInstance() {
    return ApplicationManager.getApplication().getComponent(DocumentReferenceManager.class);
  }

  @NotNull
  public abstract DocumentReference create(@NotNull Document document);

  @NotNull
  public abstract DocumentReference create(@NotNull VirtualFile file);
}