Bean Dialog - empty input

[nirlib]

When field in bean dialog is not produced the value is null.
When field in bean dialog is produced and then deleted the value is empty string.
(for String - empty string, for File - File object with empty string)

[itaiag]

One option for a fix is to edit the LinkedHashMap<String, String> propertiesToMap(Properties properties) in the GenericObjectParameterProvider class:

	private static LinkedHashMap<String, String> propertiesToMap(Properties properties){
		LinkedHashMap<String, String> map = new LinkedHashMap<String, String>();
		Set<Object> keys = properties.keySet();
		for(Object key: keys){
			map.put(key.toString(), properties.getProperty(key.toString()));
		}
		return map;
	}

In case the value of the property is empty, the property should not be added to the map at all.