creating textarea wherein I can manually enter values.

I have written datautility extending AbstractDataUtility but textarea is not visible in table builder.Code is as follows.

public class AttributeTextAreaDataUtility extends AbstractAttributeDataUtility {

    public Object getDataValue(String component_id, Object datum, ModelContext mc) throws WTException

    {

           super.getDataValue(component_id, datum, mc);

        TextArea textarea = new TextArea();

        TextArea textArea = GuiComponentUtil.createTextArea(1, 2, 3 );

        //textArea.setColumnName(AttributeDataUtilityHelper.getColumnName(component_id, datum, mc));

        textarea.setValue(getAttributeDisplayValue(component_id, component_id, datum, mc));

        textarea.setReadOnly(true);

        textarea.setWidth(40);

        textarea.setHeight(5);

        //textarea.setName(component_id);

        return textarea;

    }

    private static String getAttributeDisplayValue(String attributeName,String componentId, Object datum, ModelContext mc)

            throws WTException

            {

        Object raw_val = UtilityHelper.getRawValue(attributeName, datum, mc);

        String value = UtilityHelper.getStringValue(raw_val, componentId,datum, mc);

        return value;

    }

}