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• Use complex OGNL expressions - the framework will automatically take care of creating the actual objects for you.
• Use JavaBeans! The framework can only create objects if the objects obey the JavaBean specification and provide no-arg constructions, as well as getters and setters where appropriate.
• Remember that person.name will call getPerson().setName(), but if in order for the framework to create the Person object for you, a setPerson must also exist.

• Wiki Markup
  For lists and maps, use index notation, such as _people\[0\].name_ or _friends\['patrick'\].name_. Often these HTML form elements are being rendered inside a loop. For [JSP Tags], use the iterator tag's status attribute. For [FreeMarker Tags], use the special property $\{foo_index\}\[\].

• For multiple select boxes, it isn't possible to use index notation to name each individual item. Instead, name your element people.name and the framework will understand that it should create a new Person object for each selected item and set its name accordingly.

Creating a Type Converter

To create a type converter one would need to extends StrutsTypeConverter.

 public class MyConverter extends WebWorkConverter {
    public Object convertFromString(Map context, String[] values, Class toClass) {
       .....
    }

    public String convertToString(Map context, Object o) {
       .....
    }
 }

Advanced Type Conversion

The framework also handles advanced type conversion cases, like null property handling and converting values in Maps and Collections, and type conversion error handling.

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