/*
 * Copyright 2013-present Facebook, Inc.
 *
 * 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.facebook.buck.util.cache;

import com.facebook.buck.io.ArchiveMemberPath;
import com.google.common.hash.HashCode;
import java.io.IOException;
import java.nio.file.NoSuchFileException;
import java.nio.file.Path;

// TODO(mbolin): This should be renamed to DummyFileHashCache and moved under the test/
// directory.
public class NullFileHashCache implements FileHashCache {

  @Override
  public void invalidate(Path path) {}

  @Override
  public void invalidateAll() {}

  @Override
  public HashCode get(Path path) throws IOException {
    throw new NoSuchFileException(path.toString());
  }

  @Override
  public long getSize(Path path) throws IOException {
    throw new NoSuchFileException(path.toString());
  }

  @Override
  public HashCode get(ArchiveMemberPath archiveMemberPath) throws IOException {
    throw new NoSuchFileException(archiveMemberPath.toString());
  }

  @Override
  public void set(Path path, HashCode hashCode) {}

  @Override
  public FileHashCacheVerificationResult verify() throws IOException {
    return FileHashCacheVerificationResult.builder()
        .setCachesExamined(1)
        .setFilesExamined(0)
        .build();
  }
}