Elephant/elephant/src/main/java/org/turro/elephant/documents/FileComparator.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2011 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.turro.elephant.documents;
 
import java.util.Comparator;
 
public class FileComparator implements Comparator {
 
  public FileComparator() {
  }
 
  @Override
  public int compare(Object o1, Object o2) {
    FileDocument fd1 = (FileDocument) o1,
                 fd2 = (FileDocument) o2;
    
    String field;
    boolean desc;
    int result = 0;
    for(int i = 0; i < 10 && result == 0; i++) {
      field = fd1.getDocumentsRoot().readRootConfig("file.ordering." + i + ".name");
      desc = "desc".equals(fd1.getDocumentsRoot().readRootConfig("file.ordering." + i + ".order"));
      if(result == 0 && "directory".equals(field)) {
        if(!fd1.isDirectory() && fd2.isDirectory()) {
          result = 1;
        }
        else if(fd1.isDirectory() && !fd2.isDirectory()) {
          result = -1;
        }
        else {
          result = 0;
        }
        if(desc) result *= -1;
      }
      else if(result == 0 && "fileName".equals(field)) {
        result = fd1.getName().compareTo(fd2.getName());
        if(desc) result *= -1;
      }
      else if(result == 0 && "fileDate".equals(field)) {
        result = new Long(fd1.lastModified()).compareTo(fd2.lastModified());
        if(desc) result *= -1;
      }
      else if(!fd1.isDirectory() && !fd2.isDirectory() && result == 0 && "fileSize".equals(field)) {
        result = new Long(fd1.length()).compareTo(fd2.length());
        if(desc) result *= -1;
      }
    }
    return result;
  }
  
}