带有数值的 JAXB 枚举 [英] JAXB enumeration with numeric values

问题描述

我想限制这样的输入值

<simpleType name="SomeCode">
  <restriction base="string">
    <enumeration value="036222B"/>
    <enumeration value="036111C"/>
  </restriction>
</simpleType>

但这不会生成枚举.我怀疑这是因为值以数字开头，而 Enum 值不允许这样做.

But this does not generate an Enum. I suspect it is because the values start with numbers and this is not allowed for Enum values.

是否有任何解决方案或解决方法?

Is there any solution or workaround?

推荐答案

这是我对一个类似问题的回答，可能会有所帮助(请参阅问题 2):

Here is my answer to a similar question that may help (see issue 2):

• 枚举与架构不匹配:jaxb 或 xsd 的问题?

有几个枚举值会导致此问题.这些问题可以通过使用 JAXB 外部绑定文件来克服(见下文).

There are a couple of enumeration values that are causing this issue. These issues can be overcome through the use of a JAXB external binding file (see below).

枚举问题 #1 - 空字符串

您的某些枚举值是空字符串 ("")，这会导致生成字符串而不是枚举属性:

Some of your enum values are empty string (""), which is causing a String rather than an enum property to be generated:

<xs:enumeration value="">
    <xs:annotation>
        <xs:documentation>Blank</xs:documentation> 
    </xs:annotation>
</xs:enumeration>

枚举问题 #2 - 数字字符串

一些枚举值是导致生成字符串而不是枚举属性的数字:

Some of the enum values are numbers which is causing a String rather than an enum property to be generated:

<xs:enumeration value="6">
    <xs:annotation>
        <xs:documentation>6th grade</xs:documentation> 
   </xs:annotation>
</xs:enumeration>

绑定文件(bindings.xml)

以下绑定文件可用于解决educationLevelType的问题，这里的概念可以应用于所有有问题的类型:

The following bindings file can be used to address the issues with the educationLevelType, the concepts here can be applied to all the problematic types:

<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="http://www.acf.hhs.gov/programs/cb/systems/nytd/nytd_data_file_format.xsd">
        <jxb:bindings node="//xs:simpleType[@name='educationLevelType']/xs:restriction/xs:enumeration[@value='6']">
            <jxb:typesafeEnumMember name="SIX"/>
        </jxb:bindings>
        <jxb:bindings node="//xs:simpleType[@name='educationLevelType']/xs:restriction/xs:enumeration[@value='7']">
            <jxb:typesafeEnumMember name="SEVEN"/>
        </jxb:bindings>
        <jxb:bindings node="//xs:simpleType[@name='educationLevelType']/xs:restriction/xs:enumeration[@value='8']">
            <jxb:typesafeEnumMember name="EIGHT"/>
        </jxb:bindings>
        <jxb:bindings node="//xs:simpleType[@name='educationLevelType']/xs:restriction/xs:enumeration[@value='9']">
            <jxb:typesafeEnumMember name="NINE"/>
        </jxb:bindings>
        <jxb:bindings node="//xs:simpleType[@name='educationLevelType']/xs:restriction/xs:enumeration[@value='10']">
            <jxb:typesafeEnumMember name="TEN"/>
        </jxb:bindings>
        <jxb:bindings node="//xs:simpleType[@name='educationLevelType']/xs:restriction/xs:enumeration[@value='11']">
            <jxb:typesafeEnumMember name="ELEVEN"/>
        </jxb:bindings>
        <jxb:bindings node="//xs:simpleType[@name='educationLevelType']/xs:restriction/xs:enumeration[@value='12']">
            <jxb:typesafeEnumMember name="TWELVE"/>
        </jxb:bindings>
        <jxb:bindings node="//xs:simpleType[@name='educationLevelType']/xs:restriction/xs:enumeration[@value='']">
            <jxb:typesafeEnumMember name="BLANK"/>
        </jxb:bindings>
    </jxb:bindings>
</jxb:bindings>

XJC 调用可以如下进行(-nv 标志如下所述):

The XJC call can be made as follows (the -nv flag is described below):

xjc -nv -b bindings.xml -d out http://www.acf.hhs.gov/programs/cb/systems/nytd/nytd_data_file_format.xsd

这将导致生成以下枚举:

This will cause the following Enum to be generated:

package gov.hhs.acf.nytd;

import javax.xml.bind.annotation.XmlEnum;
import javax.xml.bind.annotation.XmlEnumValue;
import javax.xml.bind.annotation.XmlType;

@XmlType(name = "educationLevelType")
@XmlEnum
public enum EducationLevelType {

    @XmlEnumValue("under 6")
    UNDER_6("under 6"),

    @XmlEnumValue("6")
    SIX("6"),

    @XmlEnumValue("7")
    SEVEN("7"),

    @XmlEnumValue("8")
    EIGHT("8"),

    @XmlEnumValue("9")
    NINE("9"),

    @XmlEnumValue("10")
    TEN("10"),

    @XmlEnumValue("11")
    ELEVEN("11"),

    @XmlEnumValue("12")
    TWELVE("12"),

    @XmlEnumValue("post secondary")
    POST_SECONDARY("post secondary"),

    @XmlEnumValue("college")
    COLLEGE("college"),
    @XmlEnumValue("")

    BLANK("");
    private final String value;

    EducationLevelType(String v) {
        value = v;
    }

    public String value() {
        return value;
    }

    public static EducationLevelType fromValue(String v) {
        for (EducationLevelType c: EducationLevelType.values()) {
            if (c.value.equals(v)) {
                return c;
            }
        }
        throw new IllegalArgumentException(v);
    }

}

ma​​xOccurs 问题

对于 maxOccurs 问题，以下带有 no verify (-nv) 标志的命令行可用于解析 XML 架构:

For the maxOccurs issue, the following command line with the no verify (-nv) flag can be used to parse the XML schema:

xjc -nv -d out http://www.acf.hhs.gov/programs/cb/systems/nytd/nytd_data_file_format.xsd

这将使您无需修改​​ XML 架构即可解决以下错误:

This will get you past the following error without having to modify the XML schema:

正在解析架构... [错误] 当前解析器的配置没有允许 maxOccurs 属性值设置为大于值 5,000.
第 41 行http://www.acf.hhs.gov/programs/cb/systems/nytd/nytd_data_file_format.xsd

parsing a schema... [ERROR] Current configuration of the parser doesn't allow a maxOccurs attribute value to be set greater than the value 5,000.
line 41 of http://www.acf.hhs.gov/programs/cb/systems/nytd/nytd_data_file_format.xsd

未能解析架构.

了解更多信息

• http://blog.bdoughan.com/2011/08/jaxb-and-enums.html

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