/*
* 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.vfs.VirtualFile;
import com.intellij.util.indexing.FileBasedIndex.InputFilter;
import com.intellij.util.indexing.ID;
import jetbrains.mps.extapi.model.GeneratableSModel;
import jetbrains.mps.fileTypes.MPSFileTypeFactory;
import jetbrains.mps.generator.ModelDigestUtil;
import jetbrains.mps.util.FileUtil;
import org.jetbrains.annotations.NotNull;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Collections;
import java.util.Map;
public class LanguageModelDigestIndex extends BaseModelDigestIndex {
public static final ID<Integer, Map<String, String>> NAME = ID.create("LanguageModelDigest");
public LanguageModelDigestIndex() {
super(NAME, 2);
}
@NotNull
@Override
public InputFilter getInputFilter() {
return new InputFilter() {
@Override
public boolean acceptInput(@NotNull VirtualFile file) {
return file.getFileType().equals(MPSFileTypeFactory.LANGUAGE_FILE_TYPE);
}
};
}
@Override
protected Map<String, String> calculateDigest(byte[] content) {
String fileHash = null;
try {
fileHash = ModelDigestUtil.hashText(new InputStreamReader(new ByteArrayInputStream(content), FileUtil.DEFAULT_CHARSET));
} catch (IOException ignored) {
}
return fileHash == null ? null : Collections.singletonMap(GeneratableSModel.FILE, fileHash);
}
}