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document deprecation of Byte[], Character[] in JPA 3.2 #10103

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May 2, 2025
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document deprecation of Byte[], Character[] in JPA 3.2 #10103

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10 changes: 9 additions & 1 deletion documentation/src/main/asciidoc/introduction/Entities.adoc
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Expand Up @@ -534,11 +534,12 @@ The JPA specification defines a quite limited set of basic types:
| Primitive wrappers | `java.lang` | `Boolean`, `Integer`, `Double`, etc
| Strings | `java.lang` | `String`
| Arbitrary-precision numeric types | `java.math` | `BigInteger`, `BigDecimal`
| UUIDs | `java.util` | `UUID`
| Date/time types | `java.time` | `LocalDate`, `LocalTime`, `LocalDateTime`, `OffsetDateTime`, `Instant`, `Year`
| Deprecated date/time types 💀 | `java.util` | `Date`, `Calendar`
| Deprecated JDBC date/time types 💀 | `java.sql` | `Date`, `Time`, `Timestamp`
| Binary and character arrays | | `byte[]`, `char[]`
| UUIDs | `java.util` | `UUID`
| Binary and character wrapper arrays 💀 | `java.lang` | `Byte[]`, `Character[]`
| Enumerated types | | Any `enum`
| Serializable types | | Any type which implements `java.io.Serializable`
|====
Expand All @@ -549,6 +550,13 @@ The JPA specification defines a quite limited set of basic types:
We're begging you to use types from the `java.time` package instead of anything which inherits `java.util.Date`.
====

[WARNING]
====
The use of `Byte[]` and `Character[]` as basic types was deprecated by Jakarta Persistence 3.2.
Hibernate does not allow `null` elements in such arrays.
Use `byte[]` or `char[]` instead.
====

[CAUTION]
// .Serialization is usually a bad idea
====
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