genericutil.java

采用tapestry的简单OA系统

package com.ejsun.entapps.util;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.util.Properties;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * @author	Quake Wang
 * @since	2004-5-1
 * @version $Revision: 1.1 $
 * 
 **/
public class GenericUtil {
	private static final Log log = LogFactory.getLog(GenericUtil.class);
	
	public static final String SIMPLEOA_HOME = "simpleoa.home";
	public static final String ROOT_GROUP_NAME = "root.group.name";
	public static final String ROOT_GROUP_ID = "root.group.id";
	public static final String CONF_FILE = "simpleoa-conf.properties";

	public static Properties loadConfProperties () {
		URL url = UtilURL.fromFilename(getConfFilePath());
		if(url != null) {
			try {
				Properties confProperties = new Properties();				
				confProperties.load(url.openStream());
				return confProperties; 
			} catch (IOException e) {
				log.error(e);
				throw new IllegalStateException("loadConfProperties error: " + e);
			}			
		}
		return null;
	}
	
	public static Properties loadInitProperties() {
		Properties init = new Properties();
		try {
			URL url = UtilURL.fromResource("simpleoa-init.properties");
			if(url == null) throw new IllegalStateException("Can not find simpleoa-init.properties");
            init.load(url.openStream());
        } catch (IOException e) {
			log.error(e);
            throw new IllegalStateException("loadInitProperties error: " + e);
        }
		return init;
	}
	
	public static void storeRootGroupId(long rootGroupId) throws IOException, FileNotFoundException {
		File confFile = new File(getConfFilePath());
		Properties conf = new Properties();
		conf.setProperty(ROOT_GROUP_ID, Long.toString(rootGroupId));
		conf.store(new FileOutputStream(confFile), null);	
	}
	
	private static String getConfFilePath() {
		Properties p = loadInitProperties();
		if(p.getProperty(SIMPLEOA_HOME) == null) {
			log.warn(SIMPLEOA_HOME + " was not set, use default root path.");
			return CONF_FILE;
		} else {
			return p.getProperty(SIMPLEOA_HOME) + CONF_FILE;	
		}		
	}
}