package net.myvietnam.mvncore.configuration;

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 *    any, must include the following acknowledgement:
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import java.util.Enumeration;
import java.util.Iterator;
import java.util.Properties;
import org.apache.commons.collections.ExtendedProperties;


/**
 * Configuration converter. <br>
 * Helper class to convert between Configuration, ExtendedProperties and
 * standard Properties.
 *
 * @author <a href="mailto:mpoeschl@marmot.at">Martin Poeschl
 * @version $Id: ConfigurationConverter.java,v 1.2 2004/05/28 22:02:58 skoehler Exp $
 */
public class ConfigurationConverter
{
    /**
     * Convert a ExtendedProperties class into a Configuration class.
     *
     * @param ep ExtendedProperties object to convert
     * @return Configuration created from the ExtendedProperties
     */
    public static Configuration getConfiguration(ExtendedProperties ep)
    {
        Configuration config = new BaseConfiguration();
        for (Iterator i = ep.getKeys(); i.hasNext();)
        {
            String key = (String) i.next();
            config.setProperty(key, ep.getProperty(key));
        }
        return config;
    }

    /**
     * Convert a standard properties class into a configuration class.
     *
     * @param p properties object to convert
     * @return Configuration configuration created from the Properties
     */
    public static Configuration getConfiguration(Properties p)
    {
        Configuration config = new BaseConfiguration();
        for (Enumeration e = p.keys(); e.hasMoreElements();)
        {
            String key = (String) e.nextElement();
            config.setProperty(key, p.getProperty(key));
        }
        return config;
    }

    /**
     * Convert a Configuration class into a ExtendedProperties class.
     *
     * @param c Configuration object to convert
     * @return ExtendedProperties created from the Configuration
     */
    public static ExtendedProperties getExtendedProperties(Configuration c)
    {
        ExtendedProperties props = new ExtendedProperties();
        for (Iterator i = c.getKeys(); i.hasNext();)
        {
            String key = (String) i.next();
            props.setProperty(key, c.getProperty(key));
        }
        return props;
    }

    /**
     * Convert a Configuration class into a Properties class. Multvalue keys
     * will be collapsed by {@link Configuration#getString(String)}.
     *
     * @param c Configuration object to convert
     * @return Properties created from the Configuration
     */
    public static Properties getProperties(Configuration c)
    {
        Properties props = new Properties();

        Iterator iter = c.getKeys();

        while (iter.hasNext())
        {
            String key = (String) iter.next();
            props.setProperty(key, c.getString(key));
        }

        return props;
    }
}