001/*
002 * SonarQube
003 * Copyright (C) 2009-2017 SonarSource SA
004 * mailto:info AT sonarsource DOT com
005 *
006 * This program is free software; you can redistribute it and/or
007 * modify it under the terms of the GNU Lesser General Public
008 * License as published by the Free Software Foundation; either
009 * version 3 of the License, or (at your option) any later version.
010 *
011 * This program is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014 * Lesser General Public License for more details.
015 *
016 * You should have received a copy of the GNU Lesser General Public License
017 * along with this program; if not, write to the Free Software Foundation,
018 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
019 */
020package org.sonar.api.batch.fs.internal;
021
022import java.util.stream.StreamSupport;
023import org.sonar.api.batch.fs.FileSystem.Index;
024import org.sonar.api.batch.fs.InputFile;
025
026/**
027 * Partial implementation of {@link OptimizedFilePredicate}.
028 * @since 5.1
029 */
030public abstract class AbstractFilePredicate implements OptimizedFilePredicate {
031
032  protected static final int DEFAULT_PRIORITY = 10;
033  protected static final int USE_INDEX = 20;
034
035  @Override
036  public Iterable<InputFile> filter(Iterable<InputFile> target) {
037    return () -> StreamSupport.stream(target.spliterator(), false)
038      .filter(this::apply)
039      .iterator();
040  }
041
042  @Override
043  public Iterable<InputFile> get(Index index) {
044    return filter(index.inputFiles());
045  }
046
047  @Override
048  public int priority() {
049    return DEFAULT_PRIORITY;
050  }
051
052  @Override
053  public final int compareTo(OptimizedFilePredicate o) {
054    return o.priority() - priority();
055  }
056
057}