Method isEmpty

src/main/java/freemarker/core/Expression.java:154–174

(TemplateModel model)

    static boolean isEmpty(TemplateModel model) throws TemplateModelException
    {
        if (model instanceof BeanModel) {
            return ((BeanModel) model).isEmpty();
        } else if (model instanceof TemplateSequenceModel) {
            return ((TemplateSequenceModel) model).size() == 0;
        } else if (model instanceof TemplateScalarModel) {
            String s = ((TemplateScalarModel) model).getAsString();
            return (s == null || s.length() == 0);
        } else if (model instanceof TemplateCollectionModel) {
            return !((TemplateCollectionModel) model).iterator().hasNext();
        } else if (model instanceof TemplateHashModel) {
            return ((TemplateHashModel) model).isEmpty();
        } else if (model instanceof TemplateNumberModel
                || model instanceof TemplateDateModel
                || model instanceof TemplateBooleanModel) {
            return false;
        } else {
            return true;
        }
    }
}