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package com.oracle.truffle.tools.utils.json;

/*
Public Domain.
*/

import java.util.Enumeration;
import java.util.Properties;

/**
 * Converts a Property file data into JSONObject and back.
 * @author JSON.org
 * @version 2015-05-05
 */
public class Property {
    /**
     * Converts a property file object into a JSONObject. The property file object is a table of name value pairs.
     * @param properties java.util.Properties
     * @return JSONObject
     * @throws JSONException if a called function has an error
     */
    public static JSONObject toJSONObject(java.util.Properties properties) throws JSONException {
        // can't use the new constructor for Android support
        // JSONObject jo = new JSONObject(properties == null ? 0 : properties.size());
        JSONObject jo = new JSONObject();
        if (properties != null && !properties.isEmpty()) {
            Enumeration enumProperties = properties.propertyNames();
            while(enumProperties.hasMoreElements()) {
                String name = (String)enumProperties.nextElement();
                jo.put(name, properties.getProperty(name));
            }
        }
        return jo;
    }

    /**
     * Converts the JSONObject into a property file object.
     * @param jo JSONObject
     * @return java.util.Properties
     * @throws JSONException if a called function has an error
     */
    public static Properties toProperties(JSONObject jo)  throws JSONException {
        Properties  properties = new Properties();
        if (jo != null) {
        	// Don't use the new entrySet API to maintain Android support
            for (final String key : jo.keySet()) {
                Object value = jo.opt(key);
                if (!JSONObject.NULL.equals(value)) {
                    properties.put(key, value.toString());
                }
            }
        }
        return properties;
    }
}