/*
* 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.util.indexing.FileContent;
import com.intellij.util.indexing.ID;
import com.intellij.util.indexing.SingleEntryFileBasedIndexExtension;
import com.intellij.util.indexing.SingleEntryIndexer;
import com.intellij.util.io.DataExternalizer;
import com.intellij.util.io.EnumeratorStringDescriptor;
import org.jetbrains.annotations.NotNull;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
public abstract class BaseModelDigestIndex extends SingleEntryFileBasedIndexExtension<Map<String, String>> {
private final ID<Integer, Map<String, String>> myName;
private final int myVersion;
protected BaseModelDigestIndex(@NotNull ID<Integer, Map<String, String>> name, int version) {
myName = name;
myVersion = version;
}
@NotNull
@Override
public final ID<Integer, Map<String, String>> getName() {
return myName;
}
@Override
public final int getVersion() {
return myVersion;
}
@NotNull
@Override
public DataExternalizer<Map<String, String>> getValueExternalizer() {
return new MapStringStringExternalizer();
}
@NotNull
@Override
public SingleEntryIndexer<Map<String, String>> getIndexer() {
return new SingleEntryIndexer<Map<String, String>>(false) {
@Override
protected Map<String, String> computeValue(@NotNull FileContent inputData) {
return calculateDigest(inputData.getContent());
}
};
}
protected abstract Map<String, String> calculateDigest(byte[] content);
@Override
public boolean dependsOnFileContent() {
return true;
}
public class MapStringStringExternalizer implements DataExternalizer<Map<String, String>> {
private DataExternalizer<String> myInnerExternalizer = new EnumeratorStringDescriptor();
@Override
public void save(@NotNull DataOutput output, Map<String, String> map) throws IOException {
output.writeInt(map.size());
for (Map.Entry<String, String> entry : map.entrySet()) {
myInnerExternalizer.save(output, entry.getKey());
myInnerExternalizer.save(output, entry.getValue());
}
}
@Override
public Map<String, String> read(@NotNull DataInput input) throws IOException {
Map<String, String> result = new HashMap<String, String>();
for (int i = input.readInt(); i > 0; i--) {
result.put(myInnerExternalizer.read(input), myInnerExternalizer.read(input));
}
return result;
}
}
}