JAXB 绑定 - 将 typesafeEnumBase 设置为空（将枚举转换为字符串）

Question

根据link

If typesafeEnumBase is set to xsd:string, it would be a global way to specify that all simple type definitions deriving directly or indirectly from xsd:string and having enumeration facets should be bound by default to a typesafe enum. If typesafeEnumBase is set to an empty string, "", no simple type definitions would ever be bound to a typesafe enum class by default. The value of typesafeEnumBase can be any atomic simple type definition except xsd:boolean and both binary types.

所以我已经为我的 binding.xjb 设置了以下内容：

<jxb:globalBindings typesafeEnumBase=""/>

当运行和 jaxb2-maven-plugin 时，我得到以下异常：

lineNumber: 5; columnNumber: 46; cvc-minLength-valid: Value '' with length = '0' is not facet-valid with respect to minLength '1' for type '#AnonType_typesafeEnumBaseglobalBindings'.
...
lineNumber: 5; columnNumber: 46; cvc-attribute.3: The value '' of attribute 'typesafeEnumBase' on element 'jxb:globalBindings' is not valid with respect to its type, 'null'.

据我所知，我不能将空字符串 "" 设置为 typesafeEnumBase，即使文档是这样说的。文档还提到它不能是 xsd:boolean。

我只想将以下内容转换为 String 而不是 enum

<xs:simpleType name="phraseID">
    <xs:restriction base="escapedStringUserType">
        <xs:enumeration value="NOT_SPECIFIED"/>
        <xs:enumeration value="X000-9999"/>
        <xs:enumeration value="X000-9998"/>
    </xs:restriction>
</xs:simpleType>

一个相关的 SO 问题是 here 但由于我无法设置空字符串 "" 或将 xsd:boolean 值设置为 typesafeEnumBase none答案对我有用（都试过了）。

Answer 1

您可以为具有枚举限制的特定简单类型指定您不希望将其映射到 Java enum，如本例所示：

<?xml version="1.0" encoding="UTF-8"?>
<jaxb:bindings
        xmlns:jaxb="http://java.sun.com/xml/ns/jaxb" 
        xmlns:xs="http://www.w3.org/2001/XMLSchema" version="1.0">
    <jaxb:bindings
            schemaLocation="myschema.xsd" 
            node="/xs:schema/xs:simpleType[@name='phraseID']">
        <jaxb:typesafeEnumClass map="false"/>
    </jaxb:bindings>
</jaxb:bindings>

但据我所知，没有办法为所有具有枚举限制的简单类型全局设置它（例如，你不能在 <jaxb:globalBindings> 中直接使用 <jaxb:typesafeEnumClass map="false"/>）。

（如果有人知道怎么做，我也想知道，所以请评论或回答）。

Answer 2

设置以下

<jxb:globalBindings typesafeEnumMaxMembers="0"/>

不会为所有具有枚举限制的简单类型生成任何枚举，而是会将它们转换为字符串，但它会在控制台中发出警告，如下所示：

Simple type "xxx-address" was not mapped to Enum due to EnumMemberSizeCap limit. Facets count: 10, current limit: 0. You can use customization attribute "typesafeEnumMaxMembers" to extend the limit.

JAXB 绑定 - 将 typesafeEnumBase 设置为空（将枚举转换为字符串）

JAXB bindings - set typesafeEnumBase to empty (convert enumerations to strings)

xml

xsd

jaxb

xjc

jaxb2-maven-plugin