JAXBElement

java.lang.Object
- jakarta.xml.bind.JAXBElement<T>

All Implemented Interfaces:

java.io.Serializable
```
public class JAXBElement<T>
extends java.lang.Object
implements java.io.Serializable
```
Jakarta XML Binding representation of an Xml Element.

This class represents information about an Xml Element from both the element declaration within a schema and the element instance value within an xml document with the following properties
- element's xml tag name
- value represents the element instance's attribute(s) and content model
- element declaration's declaredType (xs:element @type attribute)
- scope of element declaration
- boolean nil property. (element instance's xsi:nil attribute)
The declaredType and scope property are the Jakarta XML Binding class binding for the xml type definition.

Scope is either JAXBElement.GlobalScope or the Java class representing the complex type definition containing the schema element declaration.

There is a property constraint that if value is null, then nil must be true. The converse is not true to enable representing a nil element with attribute(s). If nil is true, it is possible that value is non-null so it can hold the value of the attributes associated with a nil element.
Since:

1.6, JAXB 2.0

See Also:

Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

static class JAXBElement.GlobalScope
Designates global scope for an xml element.

Nested Classes
Modifier and Type	Class and Description
`static class`	`JAXBElement.GlobalScope` Designates global scope for an xml element.

Field Summary

Fields
Modifier and Type	Field and Description
`protected java.lang.Class<T>`	`declaredType` Java datatype binding for xml element declaration's type.
`protected javax.xml.namespace.QName`	`name` xml element tag name
`protected boolean`	`nil` true iff the xml element instance has xsi:nil="true".
`protected java.lang.Class<?>`	`scope` Scope of xml element declaration representing this xml element instance.
`protected T`	`value` xml element value.

Constructor Summary

Constructors
Constructor and Description
`JAXBElement(javax.xml.namespace.QName name, java.lang.Class<T> declaredType, java.lang.Class<?> scope, T value)` Construct an xml element instance.
`JAXBElement(javax.xml.namespace.QName name, java.lang.Class<T> declaredType, T value)` Construct an xml element instance.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`java.lang.Class<T>`	`getDeclaredType()` Returns the Java binding of the xml element declaration's type attribute.
`javax.xml.namespace.QName`	`getName()` Returns the xml element tag name.
`java.lang.Class<?>`	`getScope()` Returns scope of xml element declaration.
`T`	`getValue()` Return the content model and attribute values for this element.
`boolean`	`isGlobalScope()` Returns true iff this xml element declaration is global.
`boolean`	`isNil()` Returns `true` iff this element instance content model is nil.
`boolean`	`isTypeSubstituted()` Returns true iff this xml element instance's value has a different type than xml element declaration's declared type.
`void`	`setNil(boolean value)` Set whether this element has nil content.
`void`	`setValue(T t)` Set the content model and attributes of this xml element.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - name
```
protected final javax.xml.namespace.QName name
```
    xml element tag name
  - declaredType
```
protected final java.lang.Class<T> declaredType
```
    Java datatype binding for xml element declaration's type.
  - scope
```
protected final java.lang.Class<?> scope
```
    Scope of xml element declaration representing this xml element instance. Can be one of the following values: - JAXBElement.GlobalScope for global xml element declaration. - local element declaration has a scope set to the Java class representation of complex type defintion containing xml element declaration.
  - value
```
protected T value
```
    xml element value. Represents content model and attributes of an xml element instance.
  - nil
```
protected boolean nil
```
    true iff the xml element instance has xsi:nil="true".
- Constructor Detail
  - JAXBElement
```
public JAXBElement(javax.xml.namespace.QName name,
                   java.lang.Class<T> declaredType,
                   java.lang.Class<?> scope,
                   T value)
```
    Construct an xml element instance.
    
    Parameters:
    
    name - Java binding of xml element tag name
    
    declaredType - Java binding of xml element declaration's type
    
    scope - Java binding of scope of xml element declaration. Passing null is the same as passing GlobalScope.class
    
    value - Java instance representing xml element's value.
    
    See Also:
    
    getScope(), isTypeSubstituted()
  - JAXBElement
```
public JAXBElement(javax.xml.namespace.QName name,
                   java.lang.Class<T> declaredType,
                   T value)
```
    Construct an xml element instance. This is just a convenience method for new JAXBElement(name,declaredType,GlobalScope.class,value)
- Method Detail
  - getDeclaredType
```
public java.lang.Class<T> getDeclaredType()
```
    Returns the Java binding of the xml element declaration's type attribute.
  - getName
```
public javax.xml.namespace.QName getName()
```
    Returns the xml element tag name.
  - setValue
```
public void setValue(T t)
```
    Set the content model and attributes of this xml element.
    
    When this property is set to null, isNil() must by true. Details of constraint are described at isNil().
    
    See Also:
    
    isTypeSubstituted()
  - getValue
```
public T getValue()
```
    Return the content model and attribute values for this element.
    
    See isNil() for a description of a property constraint when this value is null
  - getScope
```
public java.lang.Class<?> getScope()
```
    Returns scope of xml element declaration.
    
    Returns:
    
    GlobalScope.class if this element is of global scope.
    
    See Also:
    
    isGlobalScope()
  - isNil
```
public boolean isNil()
```
    Returns true iff this element instance content model is nil.
    
    This property always returns true when getValue() is null. Note that the converse is not true, when this property is true, getValue() can contain a non-null value for attribute(s). It is valid for a nil xml element to have attribute(s).
  - setNil
```
public void setNil(boolean value)
```
    Set whether this element has nil content.
    
    See Also:
    
    isNil()
  - isGlobalScope
```
public boolean isGlobalScope()
```
    Returns true iff this xml element declaration is global.
  - isTypeSubstituted
```
public boolean isTypeSubstituted()
```
    Returns true iff this xml element instance's value has a different type than xml element declaration's declared type.

Class JAXBElement<T>

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

name

declaredType

scope

value

nil

Constructor Detail

JAXBElement

JAXBElement

Method Detail

getDeclaredType

getName

setValue

getValue

getScope

isNil

setNil

isGlobalScope

isTypeSubstituted