XmlElementWrapper (Java Platform SE 6) - JDK 5 Documentation v6.0, Java 2 SDK 英文文档

Overview

Package

Class

Use

Tree

Deprecated

Index

Help

Java™ Platform
Standard Ed. 6

PREV CLASS NEXT CLASS

FRAMES NO FRAMES

SUMMARY: REQUIRED | OPTIONAL

DETAIL: ELEMENT

javax.xml.bind.annotation
Annotation Type XmlElementWrapper

@Retention(value=RUNTIME) @Target(value={FIELD,METHOD}) public @interface XmlElementWrapper

Generates a wrapper element around XML representation. This is primarily intended to be used to produce a wrapper XML element around collections. The annotation therefore supports two forms of serialization shown below.

    //Example: code fragment
      int[] names;

    // XML Serialization Form 1 (Unwrapped collection)
    <names> ... </names>
    <names> ... </names>
 
    // XML Serialization Form 2 ( Wrapped collection )
    <wrapperElement>
       <names> value-of-item </names>
       <names> value-of-item </names>
       ....
    </wrapperElement>

The two serialized XML forms allow a null collection to be represented either by absence or presence of an element with a nillable attribute.

Usage

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

JavaBean property
non static, non transient field

The usage is subject to the following constraints:

The property must be a collection property
This annotation can be used with the following annotations: XmlElement, XmlElements, XmlElementRef, XmlElementRefs, XmlJavaTypeAdapter

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

Since:: JAXB2.0
See Also:: XmlElement, XmlElements, XmlElementRef, XmlElementRefs

Optional Element Summary

String name
          Name of the XML wrapper element.

String namespace
          XML target namespace of the XML wrapper element.

boolean nillable
          If true, the absence of the collection is represented by using xsi:nil='true'.

Optional Element Summary
`String`	`name` Name of the XML wrapper element.
`String`	`namespace` XML target namespace of the XML wrapper element.
`boolean`	`nillable` If true, the absence of the collection is represented by using `xsi:nil='true'`.

name

public abstract String name

Name of the XML wrapper element. By default, the XML wrapper element name is derived from the JavaBean property name.

Default:: "##default"

namespace

public abstract String namespace

XML target namespace of the XML wrapper element.

If the value is "##default", then the namespace is determined as follows:

If the enclosing package has XmlSchema annotation, and its elementFormDefault is QUALIFIED, then the namespace of the enclosing class.
Otherwise "" (which produces unqualified element in the default namespace.

Default:: "##default"

nillable

public abstract boolean nillable

If true, the absence of the collection is represented by using xsi:nil='true'. Otherwise, it is represented by the absence of the element.

Default:: false