It has been a while since Jackson 2.13 was released — about 9 months. Since then there has been steady progress, with about 50 fixes, improvements and new features (see in-progress 2.14 release notes for details). The plan is to get the first Release Candidate (2.14.0-rc1) out during August 2022. Let’s have…

Using java-uuid-generator — UUIDs? Universally Unique IDentifiers (UUIDs) are standard identifiers commonly used in distributed systems where guaranteed item id uniqueness is needed. They are 128-bit long identifiers generated using one of couple of possible generation mechanisms. UUIDs are transferred either as native 128-bit binary types or as 36-character long textual representations (32 hex…

aka 24 for 21 — One of my New Year’s goals — not a public one, just personal — for 2021 was that I would write and publish at least TWO blog posts every single month. I am very close to achieving this goal: not counting this post (I could, but that’d be bit meta), I…

(because it does not use either logging framework) — TL;DNR; Before explaining things in more details, I will make a simple statement: neither core Jackson library nor any of its FasterXML-maintained extension modules use either Log4j or Logback logging frameworks. …

aka How to read Broken JSON with Jackson — author’s note: (paraphrasing Tolstoy) all compliant JSON looks alike; but all non-compliant content is broken in its own way. Background: why/whence invalid JSON? JSON format is rather simple as far as data formats go — just check out https://www.json.org/ for the original specification — and so it would make sense that everyone would simply…

aka ObjectReader/ObjectWriter, JsonMapper.builder FTW — “Classic” Jackson API w/ ObjectMapper The most often used class in the whole Jackson databind API is — without question — ObjectMapper. ObjectMapper has been around since Jackson 0.9.5 and has methods for reading and writing JSON (*), for converting structurally compatible values, and for configuring details of these operations. Because of this, it is widely…

Jackson 2.13.0 was officially released at the very end of Q3 of 2021. It includes almost 100 changes (bug fixes, new features). Since I wrote “Sneak Peek at Jackson 2.13” a bit before the release, I thought it’d make sense to have a look if anything changed between that and actual…

“How to use jackson-dataformat-csv, part 2” — Now that we know how to read CSV with Jackson… Ok, so the assumption is that you have read my earlier post (Reading CSV with Jackson) — if not, it would probably make sense to do that first as I will be expanding on some of the aspects without repeating explanations. But here’s a brief recap: While Jackson started as…

aka “No Need to Convert from Map to JsonNode” — Jackson works with All Kinds of Java Types Jackson library allows use of all kinds of Java object types to represent JSON data to read and write: from java.util.Maps, java.util.Collection s and arrays to “Plain Old Java Object” (POJOs, aka Beans), as well as most scalar JDK types (Strings, Numbers, Booleans, Date/Time values). But equally importantly Jackson provides…