LauncherPrefsReader.java

/*
  JWildfire - an image and animation processor written in Java 
  Copyright (C) 1995-2014 Andreas Maschke

  This is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser 
  General Public License as published by the Free Software Foundation; either version 2.1 of the 
  License, or (at your option) any later version.
 
  This software 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 
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License along with this software; 
  if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jwildfire.launcher;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Properties;

import org.jwildfire.base.Tools;

public class LauncherPrefsReader {

  private String getProperty(Properties pProperties, String pKey, String pDefaultValue) {
    String res = pProperties.getProperty(pKey, "").trim();
    return res.length() > 0 ? res : pDefaultValue;
  }

  private int getIntProperty(Properties pProperties, String pKey, int pDefaultValue) {
    String val = pProperties.getProperty(pKey, "").trim();
    return val.length() > 0 ? Tools.stringToInt(val) : pDefaultValue;
  }

  private boolean getBooleanProperty(Properties pProperties, String pKey, boolean pDefaultValue) {
    String val = pProperties.getProperty(pKey, "").trim();
    return val.length() > 0 ? val.equalsIgnoreCase("true") : pDefaultValue;
  }

  //  private double getDoubleProperty(Properties pProperties, String pKey, double pDefaultValue) {
  //    String val = pProperties.getProperty(pKey, "").trim();
  //    return val.length() > 0 ? Tools.stringToDouble(val) : pDefaultValue;
  //  }

  public void readPrefs(LauncherPrefs pPrefs) throws Exception {
    File file = new File(System.getProperty("user.home"), LauncherPrefs.PREFS_FILE);
    if (file.exists()) {
      InputStream inputStream = new FileInputStream(file);
      try {
        Properties props = new Properties();
        props.load(inputStream);
        pPrefs.setJavaPath(getProperty(props, LauncherPrefs.KEY_JAVA_PATH, pPrefs.getJavaPath()));
        pPrefs.setMaxMem(getIntProperty(props, LauncherPrefs.KEY_MEMORY_MAX, pPrefs.getMaxMem()));
        pPrefs.setLowPriority(getBooleanProperty(props, LauncherPrefs.KEY_PRIORITY_LOW, pPrefs.isLowPriority()));
      }
      finally {
        inputStream.close();
      }
    }
  }
}