platform/indexing-impl/src/com/intellij/psi/search/FilenameIndexImpl.java


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// Copyright 2000-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.

package com.intellij.psi.search;

import com.intellij.util.indexing.*;
import com.intellij.util.io.EnumeratorStringDescriptor;
import com.intellij.util.io.KeyDescriptor;
import org.jetbrains.annotations.NotNull;

import java.util.Collections;

public class FilenameIndexImpl extends ScalarIndexExtension<String> {
  @NotNull
  @Override
  public ID<String,Void> getName() {
    return FilenameIndex.NAME;
  }

  @NotNull
  @Override
  public DataIndexer<String, Void, FileContent> getIndexer() {
    return inputData -> Collections.singletonMap(inputData.getFileName(), null);
  }

  @NotNull
  @Override
  public KeyDescriptor<String> getKeyDescriptor() {
    return EnumeratorStringDescriptor.INSTANCE;
  }

  @NotNull
  @Override
  public FileBasedIndex.InputFilter getInputFilter() {
    return file -> true;
  }

  @Override
  public boolean dependsOnFileContent() {
    return false;
  }

  @Override
  public boolean indexDirectories() {
    return true;
  }

  @Override
  public int getVersion() {
    return 3;
  }

  @Override
  public boolean traceKeyHashToVirtualFileMapping() {
    return true;
  }
}