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     */
020    package org.sonar.api.batch.fs.internal;
021    
022    import com.google.common.base.Predicate;
023    import com.google.common.collect.Iterables;
024    import org.sonar.api.batch.fs.FilePredicate;
025    import org.sonar.api.batch.fs.FileSystem.Index;
026    import org.sonar.api.batch.fs.InputFile;
027    
028    /**
029     * Partial implementation of {@link FilePredicate}.
030     * @since 5.1
031     */
032    public 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    }