doc.put("longStr", "123456789");
        assertEquals(Long.valueOf(123456789L), DocumentUtil.getValue(doc, "longStr", Long.class));

        doc.put("doubleStr", "123.45");
        assertEquals(Double.valueOf(123.45), DocumentUtil.getValue(doc, "doubleStr", Double.class));

        doc.put("floatStr", "123.45");
        assertEquals(Float.valueOf(123.45f), DocumentUtil.getValue(doc, "floatStr", Float.class));