package org.jsffc;

import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Constructor;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

public class Factory {

    public Map<String, Constructor> createConstructorMap(String propertiesPath, Class ... classes) throws IOException {
        
        Map<String, Constructor> constructorTable = new HashMap<String, Constructor>();
        InputStream propertiesStream = getClass().getResourceAsStream(propertiesPath);
        Properties factoryProperties = new Properties();
        
        if (propertiesStream == null) {
            return new HashMap<String, Constructor>();
        }
        
        factoryProperties.load(propertiesStream);
        propertiesStream.close();
        
        for(Enumeration names = factoryProperties.propertyNames(); names.hasMoreElements();) {
            
            String name = (String) names.nextElement();
            
            try {
                constructorTable.put(name, Class.forName(factoryProperties.getProperty(name)).getConstructor(classes));
            } catch(Exception e) {
                e.printStackTrace();
            }
             
        }
        
        return constructorTable;
    }
}