| /* |
| * 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.ide.caches; |
| |
| import com.intellij.openapi.util.UserDataHolderBase; |
| import com.intellij.openapi.vfs.VirtualFile; |
| import com.intellij.util.ArrayUtil; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.io.IOException; |
| |
| /** |
| * @author max |
| */ |
| public class FileContent extends UserDataHolderBase { |
| private final VirtualFile myVirtualFile; |
| private byte[] myCachedBytes; |
| private long myCachedLength = -1; |
| private long myCachedTimeStamp = -1; |
| private Boolean myCachedWritable; |
| |
| public FileContent(@NotNull VirtualFile virtualFile) { |
| myVirtualFile = virtualFile; |
| } |
| |
| public void cache() throws IOException { |
| getBytes(); |
| getLength(); |
| getTimeStamp(); |
| isWritable(); |
| } |
| |
| @NotNull |
| public byte[] getBytes() throws IOException { |
| if (myCachedBytes == null) { |
| myCachedBytes = myVirtualFile.isValid() ? myVirtualFile.contentsToByteArray(false) : ArrayUtil.EMPTY_BYTE_ARRAY; |
| } |
| |
| return myCachedBytes; |
| } |
| |
| public void setEmptyContent() { |
| myCachedBytes = ArrayUtil.EMPTY_BYTE_ARRAY; |
| myCachedLength = 0; |
| } |
| |
| @NotNull |
| public VirtualFile getVirtualFile() { |
| return myVirtualFile; |
| } |
| |
| public long getLength() { |
| if (myCachedLength == -1) { |
| myCachedLength = myVirtualFile.getLength(); |
| } |
| return myCachedLength; |
| } |
| |
| public long getTimeStamp() { |
| if (myCachedTimeStamp == -1) { |
| myCachedTimeStamp = myVirtualFile.getTimeStamp(); |
| } |
| return myCachedTimeStamp; |
| } |
| |
| public boolean isWritable() { |
| if (myCachedWritable == null) { |
| myCachedWritable = myVirtualFile.isWritable(); |
| } |
| return myCachedWritable == Boolean.TRUE; |
| } |
| } |