@Retention(RUNTIME) @Target(TYPE) public @interface XmlType

Maps a class or an enum type to an XML Schema type.

Usage

The @XmlType annotation can be used with the following program elements:

a top level class
an enum type

See "Package Specification" in jakarta.xml.bind.package javadoc for additional common information.

Mapping a Class

A class maps to an XML Schema type. A class is a data container for values represented by properties and fields. A schema type is a data container for values represented by schema components within a schema type's content model (e.g. model groups, attributes etc).

To be mapped, a class must either have a public no-arg constructor or a static no-arg factory method. The static factory method can be specified in factoryMethod() and factoryClass() annotation elements. The static factory method or the no-arg constructor is used during unmarshalling to create an instance of this class. If both are present, the static factory method overrides the no-arg constructor.

A class maps to either an XML Schema complex type or an XML Schema simple type. The XML Schema type is derived based on the mapping of JavaBean properties and fields contained within the class. The schema type to which the class is mapped can either be named or anonymous. A class can be mapped to an anonymous schema type by annotating the class with @XmlType(name="").

Either a global element, local element or a local attribute can be associated with an anonymous type as follows:

global element: A global element of an anonymous type can be derived by annotating the class with @XmlRootElement. See Example 3 below.
local element: A JavaBean property that references a class annotated with @XmlType(name="") and is mapped to the element associated with the anonymous type. See Example 4 below.
attribute: A JavaBean property that references a class annotated with @XmlType(name="") and is mapped to the attribute associated with the anonymous type. See Example 5 below.

Mapping to XML Schema Complex Type

If class is annotated with @XmlType(name="") , it is mapped to an anonymous type otherwise, the class name maps to a complex type name. The XmlName() annotation element can be used to customize the name.
Properties and fields that are mapped to elements are mapped to a content model within a complex type. The annotation element propOrder() can be used to customize the content model to be xs:all or xs:sequence. It is used for specifying the order of XML elements in xs:sequence.
Properties and fields can be mapped to attributes within the complex type.
The targetnamespace of the XML Schema type can be customized using the annotation element namespace().

Mapping class to XML Schema simple type

A class can be mapped to an XML Schema simple type using the @XmlValue annotation. For additional details and examples, see @XmlValue annotation type.

The following table shows the mapping of the class to an XML Schema complex type or simple type. The notational symbols used in the table are:

-> : represents a mapping
[x]+ : one or more occurrences of x
[ @XmlValue property ]: JavaBean property annotated with @XmlValue
X : don't care

Mapping class to XML Schema simple type

Target propOrder ClassBody ComplexType SimpleType

Class {} [property]+ -> elements complexcontent
xs:all

Class non empty [property]+ -> elements complexcontent
xs:sequence

Class X no property -> element complexcontent
empty sequence

Class X 1 [@XmlValue property] &&
[property]+ -> attributes simplecontent

Class X 1 [@XmlValue property] &&
no properties -> attribute simpletype

Mapping an enum type

An enum type maps to an XML schema simple type with enumeration facets. The following annotation elements are ignored since they are not meaningful: propOrder() , factoryMethod() , factoryClass() .

Usage with other annotations

This annotation can be used with the following annotations: XmlRootElement, XmlAccessorOrder, XmlAccessorType, XmlEnum. However, XmlAccessorOrder and XmlAccessorType are ignored when this annotation is used on an enum type.

Example 1: Map a class to a complex type with xs:sequence with a customized ordering of JavaBean properties.

 @XmlType(propOrder={"street", "city" , "state", "zip", "name" })
 public class USAddress {
     String getName() {..};
     void setName(String) {..};

     String getStreet() {..};
     void setStreet(String) {..};

     String getCity() {..};
     void setCity(String) {..};

     String getState() {..};
     void setState(String) {..};

     java.math.BigDecimal getZip() {..};
     void setZip(java.math.BigDecimal) {..};
 }

 <!-- XML Schema mapping for USAddress -->
 <xs:complexType name="USAddress">
   <xs:sequence>
     <xs:element name="street" type="xs:string"/>
     <xs:element name="city" type="xs:string"/>
     <xs:element name="state" type="xs:string"/>
     <xs:element name="zip" type="xs:decimal"/>
     <xs:element name="name" type="xs:string"/>
   </xs:all>
 </xs:complexType>

Example 2: Map a class to a complex type with xs:all

 @XmlType(propOrder={})
 public class USAddress { ...}

 <!-- XML Schema mapping for USAddress -->
 <xs:complexType name="USAddress">
   <xs:all>
     <xs:element name="name" type="xs:string"/>
     <xs:element name="street" type="xs:string"/>
     <xs:element name="city" type="xs:string"/>
     <xs:element name="state" type="xs:string"/>
     <xs:element name="zip" type="xs:decimal"/>
   </xs:sequence>
 </xs:complexType>

Example 3: Map a class to a global element with an anonymous type.

 @XmlRootElement
 @XmlType(name="")
 public class USAddress { ...}

 <!-- XML Schema mapping for USAddress -->
 <xs:element name="USAddress">
   <xs:complexType>
     <xs:sequence>
       <xs:element name="name" type="xs:string"/>
       <xs:element name="street" type="xs:string"/>
       <xs:element name="city" type="xs:string"/>
       <xs:element name="state" type="xs:string"/>
       <xs:element name="zip" type="xs:decimal"/>
     </xs:sequence>
   </xs:complexType>
 </xs:element>

Example 4: Map a property to a local element with anonymous type.

//Example: Code fragment
public class Invoice {
    USAddress addr;
    ...
}

@XmlType(name="")
public class USAddress { ... }

}

 <!-- XML Schema mapping for USAddress -->
 <xs:complexType name="Invoice">
   <xs:sequence>
     <xs:element name="addr">
       <xs:complexType>
         <xs:element name="name", type="xs:string"/>
         <xs:element name="city", type="xs:string"/>
         <xs:element name="city" type="xs:string"/>
         <xs:element name="state" type="xs:string"/>
         <xs:element name="zip" type="xs:decimal"/>
       </xs:complexType>
      </xs:element>
     ...
   </xs:sequence>
 </xs:complexType>

Example 5: Map a property to an attribute with anonymous type.

 //Example: Code fragment
 public class Item {
     public String name;
     @XmlAttribute
     public USPrice price;
 }

 // map class to anonymous simple type.
 @XmlType(name="")
 public class USPrice {
     @XmlValue
     public java.math.BigDecimal price;
 }

 <!-- Example: XML Schema fragment -->
 <xs:complexType name="Item">
   <xs:sequence>
     <xs:element name="name" type="xs:string"/>
     <xs:attribute name="price">
       <xs:simpleType>
         <xs:restriction base="xs:decimal"/>
       </xs:simpleType>
     </xs:attribute>
   </xs:sequence>
 </xs:complexType>

Example 6: Define a factoryClass and factoryMethod

 @XmlType(name="USAddressType", factoryClass=USAddressFactory.class,
          factoryMethod="getUSAddress")
 public class USAddress {

     private String city;
     private String name;
     private String state;
     private String street;
     private int    zip;

     public USAddress(String name, String street, String city,
             String state, int zip) {
         this.name = name;
         this.street = street;
         this.city = city;
         this.state = state;
         this.zip = zip;
     }
 }

 public class USAddressFactory {
     public static USAddress getUSAddress() {
         return new USAddress("Mark Baker", "23 Elm St",
                              "Dayton", "OH", 90952);
     }

 }

Example 7: Define factoryMethod and use the default factoryClass

 @XmlType(name="USAddressType", factoryMethod="getNewInstance")
 public class USAddress {

     private String city;
     private String name;
     private String state;
     private String street;
     private int    zip;

     private USAddress() {}

     public static USAddress getNewInstance() {
         return new USAddress();
     }
 }

Author:

Sekhar Vajjhala, Sun Microsystems, Inc.

See Also:

Nested Class Summary

Nested Classes

Modifier and Type

Class

Description

static final class

XmlType.DEFAULT

Used in factoryClass() to signal that either factory mehod is not used or that it's in the class with this XmlType itself.
Optional Element Summary

Optional Elements

Modifier and Type

Optional Element

Description

Class<?>

factoryClass

Class containing a no-arg factory method for creating an instance of this class.

String

factoryMethod

Name of a no-arg factory method in the class specified in factoryClass factoryClass().

String

name

Name of the XML Schema type which the class is mapped.

String

namespace

Name of the target namespace of the XML Schema type.

String[]

propOrder

Specifies the order for XML Schema elements when class is mapped to an XML Schema complex type.

Element Details
- name
  
  String name
  
  Name of the XML Schema type which the class is mapped.
  
  Default:
  
  "##default"
- propOrder
  
  String[] propOrder
  
  Specifies the order for XML Schema elements when class is mapped to an XML Schema complex type.
  Refer to the table for how the propOrder affects the mapping of class
  
  The propOrder is a list of names of JavaBean properties in the class. Each name in the list is the name of a Java identifier of the JavaBean property. The order in which JavaBean properties are listed is the order of XML Schema elements to which the JavaBean properties are mapped.
  
  All of the JavaBean properties being mapped to XML Schema elements must be listed.
  A JavaBean property or field listed in propOrder must not be transient or annotated with @XmlTransient.
  The default ordering of JavaBean properties is determined by @XmlAccessorOrder.
  
  Default:
  
  {""}
- namespace
  
  String namespace
  
  Name of the target namespace of the XML Schema type. By default, this is the target namespace to which the package containing the class is mapped.
  
  Default:
  
  "##default"
- factoryClass
  
  Class<?> factoryClass
  
  Class containing a no-arg factory method for creating an instance of this class. The default is this class.
  If factoryClass is DEFAULT.class and factoryMethod is "", then there is no static factory method.
  If factoryClass is DEFAULT.class and factoryMethod is not "", then factoryMethod is the name of a static factory method in this class.
  If factoryClass is not DEFAULT.class, then factoryMethod must not be "" and must be the name of a static factory method specified in factoryClass.
  
  Default:
  
  jakarta.xml.bind.annotation.XmlType.DEFAULT.class
- factoryMethod
  
  String factoryMethod
  
  Name of a no-arg factory method in the class specified in factoryClass factoryClass().
  
  Default:
  
  ""

Target	propOrder	ClassBody	ComplexType	SimpleType
Class	{}	[property]+ -> elements	complexcontent xs:all
Class	non empty	[property]+ -> elements	complexcontent xs:sequence
Class	X	no property -> element	complexcontent empty sequence
Class	X	1 [`@XmlValue` property] && [property]+ -> attributes	simplecontent
Class	X	1 [`@XmlValue` property] && no properties -> attribute		simpletype

Annotation Type XmlType

Mapping a Class

Mapping an enum type

Usage with other annotations

Nested Class Summary

Optional Element Summary

Element Details

name

propOrder

namespace

factoryClass

factoryMethod