java - Datastax java 驱动程序 3.0.0 未找到枚举注释

Question

希望我能很好地阅读文档: http://docs.datastax.com/en/developer/java-driver/3.0/java-driver/reference/crudOperations.html .

The Enumerated annotation

If your class contains an enum type field, you use the Enumerated annotation.

我有一个 Java 枚举，我想使用 @Enumerated 注释，但我似乎无法在 3.0.0 版本的驱动程序中找到它，它存在于 2.1.9 中。

$ find . -type f -name \*.jar|while read i; do echo ====== $i =====; jar -tf $i|grep Enumerated; done
====== ./cassandra-driver-core/2.1.4/cassandra-driver-core-2.1.4-javadoc.jar =====
====== ./cassandra-driver-core/2.1.4/cassandra-driver-core-2.1.4-sources.jar =====
====== ./cassandra-driver-core/2.1.4/cassandra-driver-core-2.1.4.jar =====
====== ./cassandra-driver-core/2.1.5/cassandra-driver-core-2.1.5.jar =====
====== ./cassandra-driver-core/2.1.7.1/cassandra-driver-core-2.1.7.1.jar =====
====== ./cassandra-driver-core/2.1.9/cassandra-driver-core-2.1.9.jar =====
====== ./cassandra-driver-core/3.0.0/cassandra-driver-core-3.0.0-sources.jar =====
====== ./cassandra-driver-core/3.0.0/cassandra-driver-core-3.0.0.jar =====
====== ./cassandra-driver-dse/2.1.5/cassandra-driver-dse-2.1.5.jar =====
====== ./cassandra-driver-extras/3.0.0/cassandra-driver-extras-3.0.0.jar =====
====== ./cassandra-driver-mapping/2.1.4/cassandra-driver-mapping-2.1.4-javadoc.jar =====
com/datastax/driver/mapping/annotations/class-use/Enumerated.html
com/datastax/driver/mapping/annotations/Enumerated.html
====== ./cassandra-driver-mapping/2.1.4/cassandra-driver-mapping-2.1.4-sources.jar =====
com/datastax/driver/mapping/annotations/Enumerated.java
====== ./cassandra-driver-mapping/2.1.4/cassandra-driver-mapping-2.1.4.jar =====
com/datastax/driver/mapping/annotations/Enumerated.class
====== ./cassandra-driver-mapping/2.1.7.1/cassandra-driver-mapping-2.1.7.1.jar =====
com/datastax/driver/mapping/annotations/Enumerated.class
====== ./cassandra-driver-mapping/2.1.9/cassandra-driver-mapping-2.1.9.jar =====
com/datastax/driver/mapping/annotations/Enumerated.class
====== ./cassandra-driver-mapping/3.0.0/cassandra-driver-mapping-3.0.0-sources.jar =====
====== ./cassandra-driver-mapping/3.0.0/cassandra-driver-mapping-3.0.0.jar =====

这在新版本中有变化吗？如果是，文档也应该更新。

它似乎从来源中消失了:https://github.com/datastax/java-driver/tree/3.0/driver-mapping/src/main/java/com/datastax/driver/mapping/annotations

Answer 1

看起来对@Enumerated 的支持已被删除。现在，枚举支持由 drivers-extras 中的编解码器提供。查看这两张票以获取更多信息:JAVA-605和 JAVA-846 .

安example您的枚举代码可能如下所示:

[Use] EnumOrdinalCodec and EnumNameCodec:

 java    
 enum Foo {...}
 enum Bar {...}

 // register the appropriate codecs
 CodecRegistry.DEFAULT_INSTANCE
     .register(new EnumOrdinalCodec<Foo>(Foo.class))
     .register(new EnumNameCodec<Bar>(Bar.class))

 // the following mappings are handled out-of-the-box
 @Table
 public class MyPojo {
     private Foo foo;
     private List<Bar> bars;
     ...
 }

我们正在修复文档。