如何使用JAXB从Java中的XSD获取minOccurs/maxOccurs值？

Question

[org.xml.sax.SAXParseException: cvc-complex-type.2.4.d: Invalid content was found starting with element 'ns1:TheFooAndBarThing'. 
No child element '{"http://www.myschemanamespace.xyz/v1":BarId}' is expected at this point.]

<xs:complexType name="TheFooAndBarThing">
    <xs:sequence>
        <xs:element name="FooId" minOccurs="1" maxOccurs="1" type="nx:FooIdType"/>
        <xs:element name="BarId" minOccurs="1" maxOccurs="100" type="nx:BarIdType"/>
    </xs:sequence>
</xs:complexType>

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "TheFooAndBarThing", propOrder = {
    "fooId",
    "barId"
})
public class TheFooAndBarThing {

    @XmlElement(name = "FooId", required = true)
    protected String fooId;
    @XmlElement(name = "BarId", required = true)
    protected List<String> barId;

    public String getFooId() {
        return fooId;
    }

    public void setFooId(String value) {
        this.fooId = value;
    }

    public List<String> getBarId() {
        if (barId == null) {
            barId = new ArrayList<String>();
        }
        return this.barId;
    }

}

所以我的问题是:
如何将XSD中的maxOccurs/minOccurss值导入Java代码，以便在构建元素列表时将其用作max/min值？

Answer 1

简答：没有容易的办法。

架构派生的类不再引用原始架构。即使使用XSOM之类的东西来解析原始模式，也将无法找到相应的XML模式构造来检查。

解决这个问题的最好方法是编写一个自定义的XJC插件（我写了很多）。