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/*
* 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.stubs;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.application.ModalityState;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.fileEditor.FileDocumentManager;
import com.intellij.openapi.project.DumbService;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.PsiFile;
import com.intellij.psi.PsiManager;
import com.intellij.psi.impl.PsiManagerEx;
import com.intellij.psi.impl.source.PsiFileImpl;
import com.intellij.psi.search.GlobalSearchScope;
import com.intellij.util.indexing.*;
import org.jetbrains.annotations.Nullable;
import java.io.IOException;
import java.util.List;
/**
* @author yole
*/
public class StubTreeLoaderImpl extends StubTreeLoader {
private static final Logger LOG = Logger.getInstance("#com.intellij.psi.stubs.StubTreeLoaderImpl");
@Override
@Nullable
public ObjectStubTree readOrBuild(Project project, final VirtualFile vFile, @Nullable PsiFile psiFile) {
final ObjectStubTree fromIndices = readFromVFile(project, vFile);
if (fromIndices != null) {
return fromIndices;
}
if (!canHaveStub(vFile)) {
return null;
}
try {
final FileContent fc = new FileContentImpl(vFile, vFile.contentsToByteArray());
fc.putUserData(IndexingDataKeys.PROJECT, project);
if (psiFile != null && !vFile.getFileType().isBinary()) {
fc.putUserData(IndexingDataKeys.FILE_TEXT_CONTENT_KEY, psiFile.getViewProvider().getContents());
// but don't reuse psiFile itself to avoid loading its contents. If we load AST, the stub will be thrown out anyway.
}
Stub element = StubTreeBuilder.buildStubTree(fc);
if (element instanceof PsiFileStub) {
StubTree tree = new StubTree((PsiFileStub)element);
tree.setDebugInfo("created from file content");
return tree;
}
}
catch (IOException e) {
LOG.info(e); // content can be not cached yet, and the file can be deleted on disk already, without refresh
}
return null;
}
@Override
@Nullable
public ObjectStubTree readFromVFile(Project project, final VirtualFile vFile) {
if (DumbService.getInstance(project).isDumb()) {
return null;
}
final int id = Math.abs(FileBasedIndex.getFileId(vFile));
if (id <= 0) {
return null;
}
boolean wasIndexedAlready = ((FileBasedIndexImpl)FileBasedIndex.getInstance()).isFileUpToDate(vFile);
Document document = FileDocumentManager.getInstance().getCachedDocument(vFile);
boolean saved = document == null || !FileDocumentManager.getInstance().isDocumentUnsaved(document);
final List<SerializedStubTree> datas = FileBasedIndex.getInstance().getValues(StubUpdatingIndex.INDEX_ID, id, GlobalSearchScope
.fileScope(project, vFile));
final int size = datas.size();
if (size == 1) {
SerializedStubTree stubTree = datas.get(0);
if (!stubTree.contentLengthMatches(vFile.getLength(), getCurrentTextContentLength(project, vFile, document))) {
//todo find another way of early stub-ast mismatch prevention
//return processError(vFile,
// "Outdated stub in index: " + StubUpdatingIndex.getIndexingStampInfo(vFile) +
// ", docSaved=" + saved +
// ", queried at " + vFile.getTimeStamp(),
// null);
}
Stub stub;
try {
stub = stubTree.getStub(false);
}
catch (SerializerNotFoundException e) {
return processError(vFile, "No stub serializer: " + vFile.getPresentableUrl() + ": " + e.getMessage(), e);
}
ObjectStubTree tree = stub instanceof PsiFileStub ? new StubTree((PsiFileStub)stub) : new ObjectStubTree((ObjectStubBase)stub, true);
tree.setDebugInfo("created from index");
return tree;
}
else if (size != 0) {
return processError(vFile, "Twin stubs: " + vFile.getPresentableUrl() + " has " + size + " stub versions. Should only have one. id=" + id,
null);
}
return null;
}
private static int getCurrentTextContentLength(Project project, VirtualFile vFile, Document document) {
if (vFile.getFileType().isBinary()) {
return -1;
}
PsiFile psiFile = ((PsiManagerEx)PsiManager.getInstance(project)).getFileManager().getCachedPsiFile(vFile);
if (psiFile instanceof PsiFileImpl && ((PsiFileImpl)psiFile).isContentsLoaded()) {
return psiFile.getTextLength();
}
if (document != null) {
return document.getTextLength();
}
return -1;
}
private static ObjectStubTree processError(final VirtualFile vFile, String message, @Nullable Exception e) {
LOG.error(message, e);
ApplicationManager.getApplication().invokeLater(new Runnable() {
@Override
public void run() {
final Document doc = FileDocumentManager.getInstance().getCachedDocument(vFile);
if (doc != null) {
FileDocumentManager.getInstance().saveDocument(doc);
}
}
}, ModalityState.NON_MODAL);
FileBasedIndex.getInstance().requestReindex(vFile);
return null;
}
@Override
public void rebuildStubTree(VirtualFile virtualFile) {
FileBasedIndex.getInstance().requestReindex(virtualFile);
}
@Override
public long getStubTreeTimestamp(VirtualFile vFile) {
return IndexingStamp.getIndexStamp(vFile, StubUpdatingIndex.INDEX_ID);
}
@Override
public boolean canHaveStub(VirtualFile file) {
return StubUpdatingIndex.canHaveStub(file);
}
}
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