JAXB 将多态 POJO 封送到 XML

Question

我正在尝试使用 JAXB 封送类文件(带有注释(。在<profile-set>下，它可以有不同的标签，例如

<organization-information-profile>
<connection-profile>
<user-information-profile>

示例输出 XML 文件如下所示

一(

<?xml version="1.0"?>
<request version="2.0" principal="111" credentials="xxxxx">
<target name="TestAPI" operation="create">
<parameter>
<organization>
<qualified-name>some-qualified-name</qualified-name>
<profile-set>
<name>TestOrg</name>
<organization-information-profile>
<name>Organization Information</name>
<qualified-name>/Organization Information</qualified-name>
<last-name>Test</last-name>
<address>some-address</address>
<city>my-city</city>
<province></province>
<postal-code>1111</postal-code>
<country>Timbaktu</country>
<phone-number-day>1111</phone-number-day>
<email-address>[e-mail]</email-address>
<attribute name="PhoneNumber1">
<value context="organization">23333</value>
</attribute>
<attribute name="ShortName">
<value context="organization">my company</value>
</attribute>
<attribute name="TaxId">
<value context="organization">myorg</value>
</attribute>
</organization-information-profile>
</profile-set>
</organization>
</parameter>
</target>
</request>

b(

<?xml version="1.0"?>
<request version="2.0" principal="11111" credentials="xxxxx">
<target name="TestAPI" operation="update">
<parameter>
<organization>
<qualified-name>some-qualified-name</qualified-name>
<profile-set>
<name>TestOrg</name>
<connection-profile>
<qualified-name>some-qualified-name</qualified-name> 
<service>
<name>some service</name> 
</service>
<attribute name="att-1">
<value context="organization" segment="some-segment" subscript="524288">fill-the-value</value> 
</attribute>
<attribute name="att-2">
<value context="organization" segment="some-segment" subscript="524288">qedqwe</value> 
</attribute>            
</connection-profile>
</profile-set>
</organization>
</parameter>
</target>
</request> 

下面是代码(仅配置文件集(

public static class ProfileSet
{
@XmlElement(name = "name")
public String name;
// innerPayLoad is template to store different profile objects
@XmlJavaTypeAdapter(CustomAdaptor.class)
@XmlElement
public InnerPayLoad innerPayLoad;
public ProfileSet(String name, InnerPayLoad innerPayLoad)
{
this.name = name;
this.innerPayLoad = innerPayLoad;
}
}

和定制适配器

public class CustomAdaptor extends XmlAdapter<String,InnerPayLoad<?>>
{

@Override
public InnerPayLoad<?> unmarshal(String v) throws Exception
{
return null;
}
@Override
public String marshal(InnerPayLoad<?> v) throws Exception
{
String value = TestCode.convertToXmlNoHeader(v.whichProfile,v.whichProfile.getClass());
// after converting value becomes 
//  <organization-information-profile>
//      <name>Organization Information</name>
//  </organization-information-profile> 
return value;
}
}       

但是生成的最终XML与(a(表示organization-information-profile

<?xml version='1.0' encoding='UTF-8'?>
<request version="2.0" principle="11111" credentials="xxxxx">
<target name="TestAPI" operation="create">
<parameter>
<organization>
<qualified-name>newOrg</qualified-name>
<profile-set>
<innerPayLoad>&lt;organization-information-profile>
&lt;name>Organization Information&lt;/name>
&lt;/organization-information-profile></innerPayLoad>
<name>testOrg</name>
</profile-set>
</organization>
</parameter>
</target>
</request>

是否可以删除<innerPayLoad>标签并仅插入自定义适配器封送函数返回值？

感谢解决此问题的帮助和提示。

Answer 1

您无需为ProfileSet中的各种配置文件类型编写自定义适配器。

相反，为了处理这种混合的 XML 内容，规范方法如下所示。

在ProfileSet类中，您应该定义一个多态 Java 属性profile可以采取<organization.information-profile>的内容，<connection-profile>或<user-information-profile>元素。 (我更喜欢这里的名字profile而不是innerPayload(。 这些 XML 元素名称和 Java 类之间的映射已完成 通过使用@XmlElements批注。

@XmlAccessorType(XmlAccessType.FIELD)
public class ProfileSet {
@XmlElement(name = "name")
private String name;
// template to store different profile objects    
@XmlElements({
@XmlElement(name = "organization-information-profile", type = OrganizationInfomationProfile.class),
@XmlElement(name = "connection-profile", type = ConnectionProfile.class),
@XmlElement(name = "user-information-profile", type = UserInformationProfile.class)
})
private Profile profile;
// default constructor used by JAXB unmarshaller
public ProfileSet() {
}
public ProfileSet(String name, Profile profile) {
this.name = name;
this.profile = profile;
}
}

您需要一个抽象的超类Profile，仅包含所有类型配置文件共有的属性：

@XmlAccessorType(XmlAccessType.FIELD)
public abstract class Profile {
@XmlElement
private String name;
@XmlElement(name = "attribute")
private List<Attribute> attributes;
}

您有一个子类OrganizationInformationProfile用于表示<organization-information-profile>元素

@XmlAccessorType(XmlAccessType.FIELD)
public class OrganizationInfomationProfile extends Profile {
@XmlElement(name = "qualified-name")
private String qualifiedName;
@XmlElement(name = "last-name")
private String lastName;
@XmlElement(name = "address")
private String address;
// ... other properties
}

以及另一个子类ConnectionProfile，用于表示<connection-profile>元素

@XmlAccessorType(XmlAccessType.FIELD)
public class ConnectionProfile extends Profile {
@XmlElement(name = "service")
private Service service;
}

还有另一个子类UserInformationProfile用于表示<user-information-profile>元素。

通过使用上述方法，您可以取消封送 XML 示例 并在编组时再次获得相同的输出。