Create verifier for entity persistence metadata [DATACASS-85] about spring-data-cassandra HOT 9 CLOSED

Matthew T. Adams commented

Considering that the method name in Spring Data is "verify", we should replace "Validator" with "Verifier" in the above class names & change the method name to "verify"

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Matthew T. Adams commented

Method semantics of "verify" are defined in MutablePersistentEntity#verify(); basically, it must throw MappingException if the entity class fails verification

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Matthew T. Adams commented

Some rules follow.

• A type annotated with @Table or @Persistent:

  • can have only one field annotated with @Id or @PrimaryKey.^
  • must have either a @PrimaryKey (or @Id) field of a basic type or of a type annotated with @PrimaryKeyClass.

• A type annotated with @PrimaryKeyClass:

  • must have fields that are each annotated with @PrimaryKeyColumn.^^
  • must have at least one field annotated with @PrimaryKey(type = PrimaryKeyType.PARTITIONED)

^: This may change in the future if we choose to support generated primary key classes.
^^: ...unless we choose to assume a @PrimaryKeyColumn annotation with defaults if absent.

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Matthew T. Adams commented

A field annotated with @PrimaryKey (or @Id) whose type is not annotated with @PrimaryKeyClass must be included in a list of known basic primary key field types (String, Date, UUID, etc)

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Matthew T. Adams commented

A type annotated with @PrimaryKeyClass must implement java.io.Serializable. (The compiler should catch this, but it wouldn't hurt to ensure this.)

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Matthew T. Adams commented

A type annotated with @PrimaryKeyClass must override "boolean equals(Object)" and "int hashCode()"

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Matthew T. Adams commented

A type annotated with @PrimaryKeyClass must only extend java.lang.Object. (We may loosen this restriction in the future.)

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Matthew T. Adams commented

Any field annotated with @PrimaryKeyColumn must not have a type that is annotated with @PrimaryKeyClass

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David Webb commented

Completed Verifier

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