propertyfileconfiguration.java

这是一个segy数据显示程序

/* ========================================================================
 * JCommon : a free general purpose class library for the Java(tm) platform
 * ========================================================================
 *
 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
 * 
 * Project Info:  http://www.jfree.org/jcommon/index.html
 *
 * This library 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 library 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
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 * 
 * ------------------------------------
 * PropertyFileReportConfiguration.java
 * ------------------------------------
 * (C)opyright 2003, by Thomas Morgner and Contributors.
 *
 * Original Author:  Thomas Morgner;
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * $Id: PropertyFileConfiguration.java,v 1.2 2004/06/07 14:44:56 mungady Exp $
 *
 * Changes
 * -------
 * 14-Jan-2003 : Initial version
 */
package org.jfree.base.config;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import org.jfree.util.Log;

/**
 * A report configuration that reads its values from an arbitary property file.
 *
 * @author Thomas Morgner
 */
public class PropertyFileConfiguration extends HierarchicalConfiguration
{
  /**
   * Loads the properties stored in the given file. This method does nothing if
   * the file does not exist or is unreadable. Appends the contents of the loaded
   * properties to the already stored contents.
   *
   * @param fileName the file name of the stored properties.
   */
  public void load(final String fileName)
  {
    final InputStream in = this.getClass().getResourceAsStream(fileName);
    if (in != null)
    {
      load(in);
    }
    else
    {
      Log.debug ("Report configuration file not found: " + fileName);
    }

  }

  /**
   * Loads the properties stored in the given file. This method does nothing if
   * the file does not exist or is unreadable. Appends the contents of the loaded
   * properties to the already stored contents.
   *
   * @param in the input stream used to read the properties.
   */
  public void load(final InputStream in)
  {
    if (in == null)
    {
      throw new NullPointerException();
    }

    try
    {
      final BufferedInputStream bin = new BufferedInputStream(in);
      final Properties p = new Properties();
      p.load(bin);
      this.getConfiguration().putAll(p);
      bin.close();
    }
    catch (IOException ioe)
    {
      Log.warn("Unable to read configuration", ioe);
    }

  }

  /**
   * Default constructor.
   */
  public PropertyFileConfiguration() {
      // nothing required
  }
}