枚举不符合模式：jaxb或xsd的问题？ [英] Enums don't match schema: problem with jaxb or xsd?
问题描述
我正在尝试使用JAXB来解散此文件转换成Java对象。我知道J6中的SAX有一个问题，它拒绝了maxOccurs行，而且我将其更改为 unbounded 。但是，当我 xjc 它，它不是创建所有的类&我需要的枚举例如，应该有一个 educationLevelType 枚举。更重要的是，我尝试过MS的xsd解组器，它正确地创建了所有的东西。
I'm trying to use JAXB to unmarshal this file into Java objects. I know that there's a problem with SAX in J6 that rejects the maxOccurs line, and I've changed it to unbounded. However, when I xjc it, it's not creating all the classes & enums I need. For example, there should be a educationLevelType enum. What's more, I'ved tried MS's xsd unmarshaller, it it creates everything correctly.
有更多经验的人可以看到这个，告诉我我失踪了？有没有什么需要在xsd中得到纠正，还是JAXB中有错误？
Can someone with more experience than I look at this and tell me what I'm missing? Is there something that needs to be corrected in the xsd, or is there a bug in JAXB?
更新
Blaise完全回答了这个问题。不幸的是，IMHO，这使得JAXB毫无价值。整个想法是，我可以从模式中生成类 - 我不应该事先知道关于结构的内容。如果我必须创建一个自定义绑定文件，我也可以创建一个生成我想要的代码的模式。但那么，为什么停在那里？为什么不跳过所有这些步骤并生成我想要的类？
Update Blaise completely answered this question as asked. Unfortunately, IMHO, this makes JAXB worthless. The whole idea is that I can generate classes from a schema - I shouldn't have to know stuff about the structure beforehand. If I have to create a custom bindings file, I might as well just create a schema that produces the code I want. But then, why stop there? Why not just skip all those steps and generate the classes I want?
最后，一个同事指着我去了一个 Apache XMLBeans - 该项目稍微老一些，但它创建的对象没有麻烦。 Codehaus还有一个 xmlbeans-maven-plugin 。
In the end, a coworker pointed me to Apache XMLBeans - the project's a little older, but it creates the objects without trouble. Codehaus also has a xmlbeans-maven-plugin for it.
推荐答案
有几个引起此问题的枚举值。可以通过使用JAXB外部绑定文件来克服这些问题（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
您的某些枚举值空字符串（），这将导致生成一个String而不是一个枚举属性：
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
某些枚举值是导致生成String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（-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);
}
}
maxOccurs Issue
maxOccurs Issue
对于maxOccurs问题，使用 no verify （-nv）标志的以下命令行可用于解析XML模式：
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
这将让您超越以下错误，而无需修改XML模式： / p>
This will get you past the following error without having to modify the XML schema:
解析模式... [ERROR]当前
解析器的配置不
允许maxOccurs属性值为
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
无法解析模式。
更多信息
- http://blog.bdoughan.com/2011/08/jaxb-and-enums.html
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