// Copyright (C) 2019 The Android Open Source Project
//
// 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.google.gerrit.server.query.change;

import static java.util.stream.Collectors.joining;

import com.google.common.base.Splitter;
import com.google.gerrit.server.index.change.ChangeField;

public class FileExtensionListPredicate extends ChangeIndexPredicate {
  private static String clean(String extList) {
    return Splitter.on(',').splitToList(extList).stream()
        .map(FileExtensionPredicate::clean)
        .distinct()
        .sorted()
        .collect(joining(","));
  }

  FileExtensionListPredicate(String value) {
    super(ChangeField.ONLY_EXTENSIONS, clean(value));
  }

  @Override
  public boolean match(ChangeData cd) {
    return ChangeField.getAllExtensionsAsList(cd).equals(value);
  }

  @Override
  public int getCost() {
    return 0;
  }
}