/*
* Copyright 2003-2016 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 jetbrains.mps.workbench.findusages;
import com.intellij.openapi.fileTypes.FileType;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.search.GlobalSearchScope;
import com.intellij.util.Consumer;
import com.intellij.util.indexing.DataIndexer;
import com.intellij.util.indexing.FileBasedIndex;
import com.intellij.util.indexing.FileBasedIndex.FileTypeSpecificInputFilter;
import com.intellij.util.indexing.FileBasedIndex.InputFilter;
import com.intellij.util.indexing.FileContent;
import com.intellij.util.indexing.ID;
import com.intellij.util.indexing.ScalarIndexExtension;
import com.intellij.util.io.KeyDescriptor;
import jetbrains.mps.fileTypes.MPSFileTypeFactory;
import jetbrains.mps.persistence.IndexAwareModelFactory;
import jetbrains.mps.persistence.IndexAwareModelFactory.Callback;
import jetbrains.mps.smodel.adapter.ids.SConceptId;
import jetbrains.mps.workbench.findusages.UsageEntry.ConceptInstance;
import jetbrains.mps.workbench.findusages.UsageEntry.ModelUse;
import jetbrains.mps.workbench.findusages.UsageEntry.NodeUse;
import org.apache.log4j.Logger;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.mps.openapi.model.SModelReference;
import org.jetbrains.mps.openapi.model.SNodeId;
import org.jetbrains.mps.openapi.persistence.ModelFactory;
import org.jetbrains.mps.openapi.persistence.PersistenceFacade;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
/**
* Bridge {@link IndexAwareModelFactory} to IDEA file-backed indexing mechanism
*/
public class MPSModelsIndexer extends ScalarIndexExtension<UsageEntry> {
private static final ID<UsageEntry, Void> NAME = ID.create("mps.NodeUsage");
private final Map<FileType, IndexAwareModelFactory> myIndexAwareFileTypes = new HashMap<FileType, IndexAwareModelFactory>();
public static Collection<VirtualFile> getContainingFiles(UsageEntry entry, GlobalSearchScope allFiles) {
return FileBasedIndex.getInstance().getContainingFiles(NAME, entry, allFiles);
}
public MPSModelsIndexer() {
PersistenceFacade persistenceRegistry = PersistenceFacade.getInstance();
for (String ext : persistenceRegistry.getModelFactoryExtensions()) {
final ModelFactory mf = persistenceRegistry.getModelFactory(ext);
if (mf instanceof IndexAwareModelFactory) {
final FileType ft = MPSFileTypeFactory.findByExtension(ext);
if (ft != null) {
myIndexAwareFileTypes.put(ft, (IndexAwareModelFactory) mf);
}
}
}
IndexAwareModelFactory mf = myIndexAwareFileTypes.get(MPSFileTypeFactory.MPS_FILE_TYPE);
if (mf != null) {
// ModelFactory is registered for the 'primary' extension name only, duplicate for 'auxiliary' extensions as well
myIndexAwareFileTypes.put(MPSFileTypeFactory.MPS_HEADER_FILE_TYPE, mf);
myIndexAwareFileTypes.put(MPSFileTypeFactory.MPS_ROOT_FILE_TYPE, mf);
}
}
@NotNull
@Override
public ID<UsageEntry, Void> getName() {
return NAME;
}
@NotNull
@Override
public DataIndexer<UsageEntry, Void, FileContent> getIndexer() {
return new ModelIndexer();
}
@NotNull
@Override
public KeyDescriptor<UsageEntry> getKeyDescriptor() {
return new UsageEntryKeyDescriptor();
}
@NotNull
@Override
public InputFilter getInputFilter() {
return new MyFilter();
}
@Override
public boolean dependsOnFileContent() {
return true;
}
@Override
public int getVersion() {
return 1;
}
private static class IndexCallback implements Callback {
private final Map<UsageEntry, Void> myResult = new HashMap<UsageEntry, Void>(128);
public Map<UsageEntry, Void> getResult() {
return myResult;
}
@Override
public void instances(@NotNull SConceptId concept) {
myResult.put(new ConceptInstance(concept), null);
}
@Override
public void imports(@NotNull SModelReference modelRef) {
myResult.put(new ModelUse(modelRef), null);
}
@Override
public void externalNodeRef(@NotNull SNodeId node) {
myResult.put(new NodeUse(node), null);
}
@Override
public void localNodeRef(@NotNull SNodeId node) {
myResult.put(new NodeUse(node), null);
}
}
private class MyFilter implements FileTypeSpecificInputFilter {
@Override
public void registerFileTypesUsedForIndexing(@NotNull Consumer<FileType> fileTypeSink) {
for (FileType ft : myIndexAwareFileTypes.keySet()) {
fileTypeSink.consume(ft);
}
}
@Override
public boolean acceptInput(@NotNull VirtualFile file) {
// AFAIU, FileBasedIndex does filtering according to file types supplied in #registerFileTypesUsedForIndexing
// unfortunately, it doesn't state it clearly in the javadoc.
return true;
}
}
private class ModelIndexer implements DataIndexer<UsageEntry, Void, FileContent> {
@NotNull
@Override
public Map<UsageEntry, Void> map(@NotNull FileContent inputData) {
IndexAwareModelFactory mf = myIndexAwareFileTypes.get(inputData.getFileType());
if (mf == null) {
return Collections.emptyMap();
}
final byte[] content = inputData.getContent();
final IndexCallback cb = new IndexCallback();
try {
mf.index(new ByteArrayInputStream(content), cb);
} catch (IOException ex) {
Logger.getLogger(MPSModelsIndexer.class).warn(String.format("Indexing failed: %s", ex), ex);
}
return cb.getResult();
}
}
}