| /* |
| * 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.util.indexing; |
| |
| import com.intellij.openapi.fileTypes.FileType; |
| import com.intellij.openapi.util.ShutDownTracker; |
| import com.intellij.openapi.vfs.newvfs.persistent.ContentHashesUtil; |
| import com.intellij.openapi.vfs.newvfs.persistent.FlushingDaemon; |
| import com.intellij.util.io.IOUtil; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.nio.charset.Charset; |
| import java.security.MessageDigest; |
| |
| /** |
| * @author Maxim.Mossienko |
| * @since 4/10/2014. |
| */ |
| class ContentHashesSupport { |
| private static volatile ContentHashesUtil.HashEnumerator ourHashesWithFileType; |
| |
| static void initContentHashesEnumerator() throws IOException { |
| if (ourHashesWithFileType != null) return; |
| synchronized (ContentHashesSupport.class) { |
| if (ourHashesWithFileType != null) return; |
| ContentHashesUtil.HashEnumerator hashEnumerator = null; |
| final File hashEnumeratorFile = new File(IndexInfrastructure.getPersistentIndexRoot(), "hashesWithFileType"); |
| try { |
| hashEnumerator = new ContentHashesUtil.HashEnumerator(hashEnumeratorFile, null); |
| FlushingDaemon.everyFiveSeconds(new Runnable() { |
| @Override |
| public void run() { |
| flushContentHashes(); |
| } |
| }); |
| ShutDownTracker.getInstance().registerShutdownTask(new Runnable() { |
| @Override |
| public void run() { |
| flushContentHashes(); |
| } |
| }); |
| ourHashesWithFileType = hashEnumerator; |
| } catch (IOException ex) { |
| IOUtil.deleteAllFilesStartingWith(hashEnumeratorFile); |
| throw ex; |
| } |
| } |
| } |
| |
| static void flushContentHashes() { |
| if (ourHashesWithFileType != null && ourHashesWithFileType.isDirty()) ourHashesWithFileType.force(); |
| } |
| |
| |
| static int calcContentHashIdWithFileType(@NotNull byte[] bytes, @Nullable Charset charset, @NotNull FileType fileType) throws IOException { |
| return enumerateHash(calcContentHashWithFileType(bytes, charset, fileType)); |
| } |
| |
| static int enumerateHash(@NotNull byte[] digest) throws IOException { |
| return ourHashesWithFileType.enumerate(digest); |
| } |
| |
| static byte[] calcContentHashWithFileType(@NotNull byte[] bytes, @Nullable Charset charset, @NotNull FileType fileType) throws IOException { |
| MessageDigest messageDigest = ContentHashesUtil.HASHER_CACHE.getValue(); |
| |
| Charset defaultCharset = Charset.defaultCharset(); |
| messageDigest.update(fileType.getName().getBytes(defaultCharset)); |
| messageDigest.update((byte)0); |
| messageDigest.update(String.valueOf(bytes.length).getBytes(defaultCharset)); |
| messageDigest.update((byte)0); |
| messageDigest.update((charset != null ? charset.name():"null_charset").getBytes(defaultCharset)); |
| messageDigest.update((byte)0); |
| |
| messageDigest.update(bytes, 0, bytes.length); |
| return messageDigest.digest(); |
| } |
| } |