PropertiesFile.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.file;
 
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.turro.elephant.context.ElephantContext;
 
public class PropertiesFile {
 
  public final static String FILES_PROPERTIES_FILE = ".files.properties";
 
  private File file;
  private Properties props;
 
  public PropertiesFile(File file) {
    this.file = file;
  }
 
  public Properties getProperties() throws FileNotFoundException, IOException {
    if(props == null) {
      props = new Properties();
      if(file.isDirectory()) {
        loadProperties(props, file.getAbsolutePath());
      } else {
        String parentPath = getParentPath(file.getAbsolutePath());
        if(parentPath != null) {
          loadProperties(props, parentPath);
        }
      }
    }
    return props;
  }
 
  private void loadProperties(Properties props, String path) {
    String folders[] = path.split("\\/"),
            current = "";
    loadFrom(props, new File(current + "/" + FILES_PROPERTIES_FILE));
    for(String folder : folders) {
      current = current + "/" + folder;
      loadFrom(props, new File(current + "/" + FILES_PROPERTIES_FILE));
    }
  }
 
  private void loadFrom(Properties props, File file) {
    if(!file.exists() || !file.isFile()) {
      return;
    }
    FileReader fr = null;
    try {
      fr = new FileReader(file);
      props.load(fr);
      fr.close();
    } catch (IOException ex) {
      Logger.getLogger(PropertiesFile.class.getName()).log(Level.SEVERE, ElephantContext.logMsg(null), ex);
    } finally {
      try {
        fr.close();
      } catch (IOException ex) {
        Logger.getLogger(PropertiesFile.class.getName()).log(Level.SEVERE, ElephantContext.logMsg(null), ex);
      }
    }
  }
 
  private String getParentPath(String path) {
    int p = path.lastIndexOf("/");
    if(p > -1) {
      return path.substring(0, p);
    }
    return null;
  }
}