001/*
002 * SonarQube, open source software quality management tool.
003 * Copyright (C) 2008-2014 SonarSource
004 * mailto:contact AT sonarsource DOT com
005 *
006 * SonarQube 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 * SonarQube 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 com.google.common.base.Predicate;
023import com.google.common.collect.Iterables;
024import org.sonar.api.batch.fs.FilePredicate;
025import org.sonar.api.batch.fs.FileSystem.Index;
026import org.sonar.api.batch.fs.InputFile;
027
028/**
029 * Partial implementation of {@link FilePredicate}.
030 * @since 5.1
031 */
032public abstract class AbstractFilePredicate implements OptimizedFilePredicate {
033
034  protected static final int DEFAULT_PRIORITY = 10;
035  protected static final int USE_INDEX = 20;
036
037  @Override
038  public Iterable<InputFile> filter(Iterable<InputFile> target) {
039    return Iterables.filter(target, new Predicate<InputFile>() {
040      @Override
041      public boolean apply(InputFile input) {
042        return AbstractFilePredicate.this.apply(input);
043      }
044    });
045  }
046
047  @Override
048  public Iterable<InputFile> get(Index index) {
049    return filter(index.inputFiles());
050  }
051
052  @Override
053  public int priority() {
054    return DEFAULT_PRIORITY;
055  }
056
057  @Override
058  public final int compareTo(OptimizedFilePredicate o) {
059    return o.priority() - priority();
060  }
061
062}