configurationloader.java

jConfig,JAVA读取XML的开源项目

package org.jconfig;

import org.jconfig.handler.InputStreamHandler;
import org.jconfig.handler.SimpleScriptHandler;
import org.jconfig.handler.URLHandler;
import org.jconfig.handler.XMLFileHandler;
import org.jconfig.parser.ConfigurationParser;

public class ConfigurationLoader {

	private static final ConfigurationManager cm = ConfigurationManager.getInstance();
	
	public static Configuration load() throws ConfigurationManagerException {
		InputStreamHandler ish = new InputStreamHandler("config.xml");
		Configuration config = ish.load("default");
		cm.setConfiguration(config,ish);
		return config;
	}
	
	public static Configuration load(String configName) throws ConfigurationManagerException {
		InputStreamHandler ish = new InputStreamHandler(configName+"_config.xml");
		Configuration config = ish.load(configName);
		cm.setConfiguration(config,ish);
		return config;
	}
	
	public static Configuration load(String configName,String parserName) throws ConfigurationManagerException {
		InputStreamHandler ish = new InputStreamHandler(configName+"_config.xml");
		ConfigurationParser parser = getParser(parserName);
		Configuration config = ish.load(configName,parser);
		cm.setConfiguration(config,ish);
		return config;
	}
	
	public static Configuration loadFile(String configName,String fileName) throws ConfigurationManagerException {
		XMLFileHandler xmlHandler = new XMLFileHandler(fileName);
		Configuration config = xmlHandler.load(configName);
		cm.setConfiguration(config,xmlHandler);
		return config;
	}
	
	public static Configuration loadFile(String configName,String fileName,String parserName) throws ConfigurationManagerException {
		XMLFileHandler xmlHandler = new XMLFileHandler(fileName);
		ConfigurationParser parser = getParser(parserName);
		Configuration config = xmlHandler.load(configName,parser);
		cm.setConfiguration(config,xmlHandler);
		return config;
	}
	
	public static Configuration loadFromUrl(String configName,String url) throws ConfigurationManagerException {
		URLHandler urlHandler = new URLHandler();
		urlHandler.setURL(url);
		Configuration config = urlHandler.load(configName);
		cm.setConfiguration(config,urlHandler);
		return config;
	}
	
	public static Configuration loadFromUrl(String configName,String url,String parserName) throws ConfigurationManagerException {
		URLHandler urlHandler = new URLHandler();
		urlHandler.setURL(url);
		ConfigurationParser parser = getParser(parserName);
		Configuration config = urlHandler.load(configName,parser);
		cm.setConfiguration(config,urlHandler);
		return config;
	}
	
	public static Configuration loadScript(String configName) throws ConfigurationManagerException {
		SimpleScriptHandler ssh = new SimpleScriptHandler();
		Configuration config = ssh.load(configName);
		cm.setConfiguration(config,ssh);
		return config;
	}
	
	public static Configuration loadScript(String configName,String fileName) throws ConfigurationManagerException {
		SimpleScriptHandler ssh = new SimpleScriptHandler();
		Configuration config = ssh.load(configName,fileName);
		cm.setConfiguration(config,ssh);
		return config;
	}
	
	private static ConfigurationParser getParser(String line) throws ConfigurationManagerException {
		if ( line == null ) {
			throw new ConfigurationManagerException("No parser defined");
		}
		String cls = line;
		if ( line.indexOf(".") == -1 ) {
			cls = "org.jconfig.parser."+line;
		}
		try {
			ConfigurationParser parser = (ConfigurationParser)Class.forName(cls).newInstance();
			return parser;
		}
		catch (Exception e) {
			throw new ConfigurationManagerException("The parser: "+cls+" cannot be found");
		}
	}
}