使用Maven xjc进行编译时，JAXB不会为xsd电子邮件模式元素创建类

Question

I am using xsd in which i am validation email like

<xsd:element name="Company" type="Company"/>  
<xsd:complexType name="Company">  
    <xsd:sequence>  
        <xsd:element name="Name" type="xsd:string" minOccurs="1" maxOccurs="1" />
        <xsd:element name="Website" type="xsd:string" minOccurs="0" maxOccurs="1" />
        <xsd:element name="Email" type="EmailAddress" minOccurs="0" maxOccurs="1" />
    </xsd:sequence>
    <xsd:attribute name="AccountStatus" type="AccountStatus" use="optional" default="Active" />
</xsd:complexType>

<xsd:simpleType name="EmailAddress">
    <xsd:restriction base="xsd:string">
        <xsd:pattern value="[A-Za-z0-9_]+([-+.'][A-Za-z0-9_]+)*@[A-Za-z0-9_]+([-.][A-Za-z0-9_]+)*\.[A-Za-z0-9_]+([-.][A-Za-z0-9_]+)*"/>
    </xsd:restriction>
</xsd:simpleType>

<xsd:simpleType name="AccountStatus">
    <xsd:restriction base="xsd:string">
        <xsd:enumeration value="Active"/>
        <xsd:enumeration value="Inactive"/>
    </xsd:restriction>
</xsd:simpleType>

Here is my pom.xml file that is using xjc snippet

<plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>jaxb2-maven-plugin</artifactId>
    <version>1.5</version>
    <executions>
        <execution>
            <goals>
                <goal>xjc</goal>
            </goals>
            <phase>generate-sources</phase>
        </execution>
    </executions>
    <configuration>
        <clearOutputDir>false</clearOutputDir>
        <outputDirectory>src/main/java</outputDirectory>
        <schemaDirectory>src/main/webapp/schemas</schemaDirectory>
        <includeSchema>**/*.xsd</includeSchema>
        <bindingDirectory>src/main/resources/bindings</bindingDirectory>
        <bindingFiles>binding.xml</bindingFiles>
        <enableIntrospection>false</enableIntrospection>
    </configuration>
</plugin>

here is my binding.xml file

<?xml version="1.0" encoding="UTF-8"?>
<jaxb:bindings version="2.0"
           xmlns:xs="http://www.w3.org/2001/XMLSchema" 
           xmlns:jaxb="http://java.sun.com/xml/ns/jaxb">
<jaxb:bindings>
    <jaxb:globalBindings generateElementProperty="false" />
</jaxb:bindings>

Here is the generated Company.java class

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "Company", propOrder = {
    "name",
    "website",
    "email"
})
public class Company {

    @XmlElement(name = "Name", required = true)
    protected String name;
    @XmlElement(name = "Website")
    protected String website;
    @XmlElement(name = "Email")
    protected String email;
    @XmlAttribute(name = "AccountStatus")
    protected AccountStatus accountStatus;

    //setter and getters

}

See there is no email pattern applying to my email attrubute. Why ?

when i compile my code using maven compile then there is no EmailAddress.java class that apply pattern to my email attribute in Company.java. AccountStatus is also a simple type but maven creates AccountStatus.java class. Why maven is not creating EmailAddress.java class when i compile using maven ? is there something wrong with my pattern ?

Thanks

Answer 1

AccountStatus is generated because the corresponding schema type is an enum. For other simple types (ie ones with patterns) a class will not be generated. There are a couple of reasons for not generating a class for the EmailAddress type:

1. It makes the class model unnecessarily large.
2. JAXB doesn't validate content down to that level, so having an extra generated class provides no value.
3. That value can be validated by setting an instance of Schema on the Marshaller / Unmarshaller (see: http://blog.bdoughan.com/2010/12/jaxb-and-marshalunmarshal-schema.html ).

Instead the property will be based on the base schema type.