| /* |
| * Copyright 2000-2012 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.psi.impl.cache.impl; |
| |
| import com.intellij.openapi.application.ApplicationManager; |
| import com.intellij.openapi.application.ReadActionProcessor; |
| import com.intellij.openapi.diagnostic.Logger; |
| import com.intellij.openapi.progress.ProcessCanceledException; |
| import com.intellij.openapi.progress.ProgressIndicatorProvider; |
| import com.intellij.openapi.project.IndexNotReadyException; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.openapi.roots.FileIndexFacade; |
| import com.intellij.openapi.util.Computable; |
| import com.intellij.openapi.vfs.VirtualFile; |
| import com.intellij.psi.PsiFile; |
| import com.intellij.psi.PsiManager; |
| import com.intellij.psi.impl.cache.CacheManager; |
| import com.intellij.psi.impl.cache.impl.id.IdIndex; |
| import com.intellij.psi.impl.cache.impl.id.IdIndexEntry; |
| import com.intellij.psi.search.GlobalSearchScope; |
| import com.intellij.util.CommonProcessors; |
| import com.intellij.util.Processor; |
| import com.intellij.util.indexing.FileBasedIndex; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * @author Eugene Zhuravlev |
| * Date: Jan 16, 2008 |
| */ |
| public class IndexCacheManagerImpl implements CacheManager{ |
| private static final Logger LOG = Logger.getInstance("#com.intellij.psi.impl.cache.impl.IndexCacheManagerImpl"); |
| private final Project myProject; |
| private final PsiManager myPsiManager; |
| |
| public IndexCacheManagerImpl(PsiManager psiManager) { |
| myPsiManager = psiManager; |
| myProject = psiManager.getProject(); |
| } |
| |
| @Override |
| @NotNull |
| public PsiFile[] getFilesWithWord(@NotNull final String word, final short occurenceMask, @NotNull final GlobalSearchScope scope, final boolean caseSensitively) { |
| if (myProject.isDefault()) { |
| return PsiFile.EMPTY_ARRAY; |
| } |
| CommonProcessors.CollectProcessor<PsiFile> processor = new CommonProcessors.CollectProcessor<PsiFile>(); |
| processFilesWithWord(processor, word, occurenceMask, scope, caseSensitively); |
| return processor.getResults().isEmpty() ? PsiFile.EMPTY_ARRAY : processor.toArray(PsiFile.EMPTY_ARRAY); |
| } |
| |
| // IMPORTANT!!! |
| // Since implementation of virtualFileProcessor.process() may call indices directly or indirectly, |
| // we cannot call it inside FileBasedIndex.processValues() method except in collecting form |
| // If we do, deadlocks are possible (IDEADEV-42137). Process the files without not holding indices' read lock. |
| private boolean collectVirtualFilesWithWord(@NotNull final Processor<VirtualFile> fileProcessor, |
| @NotNull final String word, final short occurrenceMask, |
| @NotNull final GlobalSearchScope scope, final boolean caseSensitively) { |
| if (myProject.isDefault()) { |
| return true; |
| } |
| |
| try { |
| return ApplicationManager.getApplication().runReadAction(new Computable<Boolean>() { |
| @Override |
| public Boolean compute() { |
| return FileBasedIndex.getInstance().processValues(IdIndex.NAME, new IdIndexEntry(word, caseSensitively), null, new FileBasedIndex.ValueProcessor<Integer>() { |
| final FileIndexFacade index = FileIndexFacade.getInstance(myProject); |
| @Override |
| public boolean process(final VirtualFile file, final Integer value) { |
| ProgressIndicatorProvider.checkCanceled(); |
| final int mask = value.intValue(); |
| if ((mask & occurrenceMask) != 0 && index.shouldBeFound(scope, file)) { |
| if (!fileProcessor.process(file)) return false; |
| } |
| return true; |
| } |
| }, scope); |
| } |
| }); |
| } |
| catch (IndexNotReadyException e) { |
| throw new ProcessCanceledException(); |
| } |
| } |
| |
| @Override |
| public boolean processFilesWithWord(@NotNull final Processor<PsiFile> psiFileProcessor, @NotNull final String word, final short occurrenceMask, @NotNull final GlobalSearchScope scope, final boolean caseSensitively) { |
| final List<VirtualFile> vFiles = new ArrayList<VirtualFile>(5); |
| collectVirtualFilesWithWord(new CommonProcessors.CollectProcessor<VirtualFile>(vFiles), word, occurrenceMask, scope, caseSensitively); |
| if (vFiles.isEmpty()) return true; |
| |
| final Processor<VirtualFile> virtualFileProcessor = new ReadActionProcessor<VirtualFile>() { |
| @Override |
| public boolean processInReadAction(VirtualFile virtualFile) { |
| if (virtualFile.isValid()) { |
| final PsiFile psiFile = myPsiManager.findFile(virtualFile); |
| return psiFile == null || psiFileProcessor.process(psiFile); |
| } |
| return true; |
| } |
| }; |
| |
| |
| // IMPORTANT!!! |
| // Since implementation of virtualFileProcessor.process() may call indices directly or indirectly, |
| // we cannot call it inside FileBasedIndex.processValues() method |
| // If we do, deadlocks are possible (IDEADEV-42137). So first we obtain files with the word specified, |
| // and then process them not holding indices' read lock. |
| for (VirtualFile vFile : vFiles) { |
| ProgressIndicatorProvider.checkCanceled(); |
| if (!virtualFileProcessor.process(vFile)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| } |