public  void setEnumAsBean(boolean enumAsBean) 
{
        this.enumAsBean = enumAsBean;
}

If true, an Enum is serialized as a bean with a special property _name=name() as all as all other properties defined within the enum.
If false, an Enum is serialized as a name=value pair (name=name())

 public  void setIgnoreHierarchy(boolean ignoreHierarchy) 
{
        this.ignoreHierarchy = ignoreHierarchy;
}

 public String write(Object object) throws JSONException 
{
        return this.write(object, null, null, false);
}

 public String write(Object object,
    Collection<Pattern> excludeProperties,
    Collection<Pattern> includeProperties,
    boolean excludeNullProperties) throws JSONException 
{
        this.excludeNullProperties = excludeNullProperties;
        this.buf.setLength(0);
        this.root = object;
        this.exprStack = "";
        this.buildExpr = ((excludeProperties != null) && !excludeProperties.isEmpty())
                || ((includeProperties != null) && !includeProperties.isEmpty());
        this.excludeProperties = excludeProperties;
        this.includeProperties = includeProperties;
        this.value(object, null);
        return this.buf.toString();
}