sunspotproperties.java

无线传感器网络节点Sun SPOT管理工具

/*
 * Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved. 
 * 
 * Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product that is
 * described in this document. In particular, and without limitation, these intellectual property rights may
 * include one or more of the U.S. patents listed at http://www.sun.com/patents and one or more additional patents
 * or pending patent applications in the U.S. and in other countries.
 * 
 * U.S. Government Rights - Commercial software. Government users are subject to the Sun Microsystems, Inc.
 * standard license agreement and applicable provisions of the FAR and its supplements.
 * 
 * Use is subject to license terms. 
 * 
 * This distribution may include materials developed by third parties. Sun, Sun Microsystems, the Sun logo and
 * Java are trademarks or registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. 
 * 
 * Copyright (c) 2006 Sun Microsystems, Inc. Tous droits r?serv?s.
 * 
 * Sun Microsystems, Inc. d?tient les droits de propri?t? intellectuels relatifs ? la technologie incorpor?e dans
 * le produit qui est d?crit dans ce document. En particulier, et ce sans limitation, ces droits de propri?t?
 * intellectuelle peuvent inclure un ou plus des brevets am?ricains list?s ? l'adresse http://www.sun.com/patents
 * et un ou les brevets suppl?mentaires ou les applications de brevet en attente aux Etats - Unis et dans les
 * autres pays.
 * 
 * L'utilisation est soumise aux termes du contrat de licence.
 * 
 * Cette distribution peut comprendre des composants d?velopp?s par des tierces parties.
 * Sun, Sun Microsystems, le logo Sun et Java sont des marques de fabrique ou des marques d?pos?es de Sun
 * Microsystems, Inc. aux Etats-Unis et dans d'autres pays.
 */
package com.sun.spot.spotworld.usb.spotselector;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.StringWriter;
import java.util.Properties;

public class SunSpotProperties {
	boolean useSunSpotProperties;

	Properties sunSpotProperties;

	File sunSpotPropertiesFile;

	boolean isVerbose;

	public SunSpotProperties() {
		this(false);
	}

	public SunSpotProperties(boolean isVerbose) {
		this.isVerbose = isVerbose;
		sunSpotProperties = new Properties();
		String userHome = System.getProperty("user.home");
		String fileSeparator=System.getProperty("file.separator");
		sunSpotPropertiesFile = new File(userHome + fileSeparator+".sunspot.properties");
		if (this.isVerbose)
			SpotSelector.infoOut.println("Loading default.basestation property...");
		try {
			FileInputStream sunSpotPropertiesFileInputStream = new FileInputStream(sunSpotPropertiesFile);
			sunSpotProperties.load(sunSpotPropertiesFileInputStream);
			useSunSpotProperties = true;
		} catch (IOException e) {
			// TODO Auto-generated catch block
			SpotSelector.infoOut.println("Warning: sunspot properties not found. (" + sunSpotPropertiesFile.getName()
					+ ")");
			useSunSpotProperties = false;
		}

	}

	public String readProperty(String key) {
		if (useSunSpotProperties)
			return sunSpotProperties.getProperty(key);
		else
			return null;
	}

	public void writeProperty(String key, String value) {
		writeProperty(key, value, "");
	}

	private String getNewPropertyString(String key,String value, String comment, String lineseparator)
	{
		String newPropertyString="";
		if ((comment!=null)&&(!comment.equals("")))
				{
					newPropertyString="# " + comment + lineseparator;
				}
		newPropertyString+=key + "=" + value;
		return newPropertyString;
	}
	public void writeProperty(String key, String value, String comment) {
		String lineSeparator=System.getProperty("line.separator","\n");
		if (useSunSpotProperties) {
			if (isVerbose)
				SpotSelector.infoOut.println("Saving " + value + " as new " + key + " property to "
						+ sunSpotPropertiesFile.getName());
			sunSpotProperties.setProperty(key, value);
			try {

				StringWriter sw=new StringWriter();

				BufferedWriter bw = new BufferedWriter(sw);
				BufferedReader br = new BufferedReader(new FileReader(sunSpotPropertiesFile));
				String line;
				boolean replaced=false;
				while ((line = br.readLine()) != null) {
					
					if (line.startsWith(key)) {
						line=getNewPropertyString(key, value, comment,lineSeparator);
						replaced=true;
					}
					if (!line.equals("# "+comment))
					{
						
						bw.write(line+lineSeparator);
					}	
				
				}
				if (!replaced)
				{
					bw.write(getNewPropertyString(key, value, comment,lineSeparator));
				}
					
				
				bw.flush();
				br.close();	
				FileWriter sunspotPropertiesFileWriter = new FileWriter(sunSpotPropertiesFile);		 
				sunspotPropertiesFileWriter.write(sw.toString());				
				sunspotPropertiesFileWriter.close();	
				sw.close();
				
			} catch (IOException e) {
				SpotSelector.infoOut.println("Warning: could not save new " + key + "=" + value
						+ " to SunSPOT property file.  (" + sunSpotPropertiesFile.getName() + ")");
			}
		}
	}
}