/*
* Copyright 2000-2016 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 com.intellij.util.indexing;
import com.intellij.openapi.vfs.newvfs.persistent.PersistentFS;
import com.intellij.util.indexing.impl.*;
import com.intellij.util.io.DataExternalizer;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.io.IOException;
import java.util.Collection;
import java.util.Map;
class SharedMapBasedForwardIndex<Key, Value> extends AbstractForwardIndex<Key,Value> {
private final DataExternalizer<Collection<Key>> mySnapshotIndexExternalizer;
private final MapBasedForwardIndex<Key, Value> myUnderlying;
SharedMapBasedForwardIndex(IndexExtension<Key, Value, ?> extension, @Nullable MapBasedForwardIndex<Key, Value> underlying) {
super(extension);
myUnderlying = underlying;
mySnapshotIndexExternalizer = VfsAwareMapReduceIndex.createInputsIndexExternalizer(extension);
assert myUnderlying != null || (SharedIndicesData.ourFileSharedIndicesEnabled && !SharedIndicesData.DO_CHECKS);
}
@NotNull
@Override
public InputDataDiffBuilder<Key, Value> getDiffBuilder(int inputId) throws IOException {
if (SharedIndicesData.ourFileSharedIndicesEnabled) {
Collection<Key> keys = SharedIndicesData.recallFileData(inputId, (ID<Key, ?>)myIndexId, mySnapshotIndexExternalizer);
if (myUnderlying != null) {
Collection<Key> keysFromInputsIndex = myUnderlying.getInputsIndex().get(inputId);
if (keys == null && keysFromInputsIndex != null ||
!DebugAssertions.equals(keysFromInputsIndex, keys, myKeyDescriptor)
) {
SharedIndicesData.associateFileData(inputId, (ID<Key, ?>)myIndexId, keysFromInputsIndex, mySnapshotIndexExternalizer);
if (keys != null) {
DebugAssertions.error(
"Unexpected indexing diff " + myIndexId + ", file:" + IndexInfrastructure.findFileById(PersistentFS.getInstance(), inputId)
+ "," + keysFromInputsIndex + "," + keys);
}
keys = keysFromInputsIndex;
}
}
return new CollectionInputDataDiffBuilder<>(inputId, keys);
}
return new CollectionInputDataDiffBuilder<>(inputId, myUnderlying.getInputsIndex().get(inputId));
}
@Override
public void putInputData(int inputId, @NotNull Map<Key, Value> data)
throws IOException {
Collection<Key> keySeq = data.keySet();
if (myUnderlying != null) myUnderlying.putData(inputId, keySeq);
if (SharedIndicesData.ourFileSharedIndicesEnabled) {
if (keySeq.isEmpty()) keySeq = null;
SharedIndicesData.associateFileData(inputId, (ID<Key, ?>)myIndexId, keySeq, mySnapshotIndexExternalizer);
}
}
@Override
public void flush() {
if (myUnderlying != null) myUnderlying.flush();
}
@Override
public void clear() throws IOException {
if (myUnderlying != null) myUnderlying.clear();
}
@Override
public void close() throws IOException {
if (myUnderlying != null) myUnderlying.close();
}
}