Xml Schema / JaxB - 如何在架构中启用空枚举,字符串,整数值而不验证错误? [英] Xml Schema / JaxB -- How to enable empty enumerations, string, integer values in schema without validation errors?
问题描述
我尝试了几件事:
1)
<xs:simpleType name="matchAnalysisType">
<xs:restriction base="xs:string">
<xs:enumeration value="A"/>
<xs:enumeration value=""/>
</xs:restriction>
</xs:simpleType>
JaxB不生成枚举,而是将matchAnalysisType标记为相应元素类型的字符串。
JaxB DOESN'T generate enums and instead marks matchAnalysisType as string for the corresponding element type.
2)使用'nillable':
2) Use 'nillable':
<xs:element name="matchAnalysisType" type="matchAnalysisType"
nillable="true">
</xs:element>
JaxB抛出''无效的错误。
JaxB throws error that '' is not valid.
该问题适用于以下其他元素类型:
The issue holds true for other element types like the following:
<xs:element name="accountNumber" minOccurs="0">
<xs:simpleType>
<xs:restriction base="xs:integer">
<xs:totalDigits value="9"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
我想要一个示例xml,允许以下内容而不会出现任何验证错误。
I'd like to have a sample xml that allows this the following without any validation errors.
<accountNumber></accountNumber>
想法?
推荐答案
JAXB没有与对应的枚举值的默认枚举值名称。如果使用外部绑定文件提供名称,则JAXB实现可以生成与此XML模式类型对应的Java枚举。
JAXB does not have a default enum value name for enum values corresponding to "". Your JAXB implementation can generate a Java enum corresponding to this XML schema type if you use an external bindings file to provide a name.
binding.xml
<jxb:bindings
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:jxb="http://java.sun.com/xml/ns/jaxb"
version="2.1">
<jxb:bindings schemaLocation="your-schema.xsd">
<jxb:bindings node="//xs:simpleType[@name='matchAnalysisType']/xs:restriction/xs:enumeration[@value='']">
<jxb:typesafeEnumMember name="BLANK"/>
</jxb:bindings>
</jxb:bindings>
</jxb:bindings>
XJC致电
使用 -b
参数在XJC调用中指定绑定文件:
The binding file is specified in the XJC call using the -b
parameter:
xjc -b binding.xml your-schema.xsd
更多信息
- http://blog.bdoughan.com/2011/08/jaxb-and-enums.html
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