/*
* Copyright 2003-2015 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.ide.generator.index;
import com.intellij.openapi.components.ApplicationComponent;
import com.intellij.openapi.progress.ProcessCanceledException;
import com.intellij.openapi.project.IndexNotReadyException;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.search.EverythingGlobalScope;
import com.intellij.util.indexing.FileBasedIndex;
import com.intellij.util.indexing.FileBasedIndex.ValueProcessor;
import com.intellij.util.indexing.ID;
import jetbrains.mps.ide.vfs.IdeaFile;
import jetbrains.mps.ide.vfs.VirtualFileUtils;
import jetbrains.mps.persistence.ModelDigestHelper;
import jetbrains.mps.persistence.ModelDigestHelper.DigestProvider;
import jetbrains.mps.vfs.IFile;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
import org.jetbrains.annotations.NotNull;
import java.util.Map;
public class IndexBasedModelDigest implements ApplicationComponent {
private static final Logger LOG = LogManager.getLogger(IndexBasedModelDigest.class);
@Override
@NotNull
public String getComponentName() {
return "Index based model digest component";
}
@Override
public void initComponent() {
// default model persistence (.mps files)
ModelDigestHelper.getInstance().addDigestProvider(new BaseModelDigestProvider(ModelDigestIndex.NAME));
// binary model persistence (.mpb files)
ModelDigestHelper.getInstance().addDigestProvider(new BaseModelDigestProvider(BinaryModelDigestIndex.NAME));
// language module files (.mpl files)
ModelDigestHelper.getInstance().addDigestProvider(new BaseModelDigestProvider(LanguageModelDigestIndex.NAME));
}
@Override
public void disposeComponent() {
}
private static class BaseModelDigestProvider implements DigestProvider {
private ID<Integer, Map<String, String>> myName;
private BaseModelDigestProvider(ID<Integer, Map<String, String>> name) {
myName = name;
}
@Override
public Map<String, String> getGenerationHashes(@NotNull IFile iFile) {
try {
if (!(iFile instanceof IdeaFile)) {
return null;
}
VirtualFile file = ((IdeaFile) iFile).getVirtualFile();
if (file == null) {
return null;
}
final Map<String, String>[] valueArray = new Map[]{null};
FileBasedIndex.getInstance().processValues(myName, FileBasedIndex.getFileId(file), file,
new ValueProcessor<Map<String, String>>() {
@Override
public boolean process(VirtualFile file, Map<String, String> values) {
valueArray[0] = values;
return true;
}
}, new EverythingGlobalScope());
return valueArray[0];
} catch (IndexNotReadyException e) {
// generally, it's bad to get here (we'd rather check for dumb mode prior accessing the index
// however, there's nothing bad in returning null here as it's merely an indication of no cached
// hash value, and we can calculate it again, if needed. Hence, debug log level looks fine.
LOG.debug(e.getClass().getName(), e);
} catch (ProcessCanceledException e) {
LOG.warn(e.getMessage());
}
return null;
}
}
}