| /* |
| * 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.editor.Document; |
| import com.intellij.openapi.vfs.VirtualFile; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Do not implement this directly. Use DocumentReferenceManager instead. |
| */ |
| public interface DocumentReference { |
| DocumentReference[] EMPTY_ARRAY = new DocumentReference[0]; |
| |
| @Nullable |
| Document getDocument(); |
| |
| @Nullable |
| VirtualFile getFile(); |
| } |