Hi Wolfgang,
The problem is that I want to use my own class to hold value of XML simple
type. The JAXB 2.2 spec says that xs:anySimpleType is mapped to both
java.lang.Object and java.lang.String. It is not completely clear to me how
JAXB implementation should choose String over Object and vice versa.
I would expect that xsi:type controls this so that if concrete type like
xs:int specified, then the value is of Java int type (probably boxed in
java.lang.Integer). However, the behavior that I see is that the type is
always java.lang.String. When I specify something like
@XmlValue
@XmlSchemaType(name = "anySimpleType")
protected Object value
I expect JAXB implementation to perform type substitution based on the
xsi:type attribute.
I am wondering if this area is not covered by JAXB so I cannot expect type
substitution to work for the case above.
Wolfgang Laun-2 wrote:
>
> You could use a class resulting from the following XML schema:
>
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
> version="2.0">
> <xs:element name="doc" type="DocType"/>
> <xs:complexType name="DocType">
> <xs:sequence>
> <xs:element name="field" type="xs:anySimpleType"/>
> </xs:sequence>
> <xs:attribute name="name" type="xs:string"/>
> </xs:complexType>
> </xs:schema>
>
> Setting the Object field to an Integer and marshalling results in
> <doc name="integer">
> <field xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xmlns:xs="http://www.w3.org/2001/XMLSchema"
> xsi:type="xs:int">42</field>
> </doc>
> and this unmarshals properly.
>
> I don't think it's possible to have also an attribute in the element
> which has anySimpleType as its @XmlSchemaType. For this the XML Schema
> type would have to be a complex type.
>
> -W
>
>
>
> On Sun, May 2, 2010 at 9:49 AM, zeiss <zeiss_at_tut.by> wrote:
>>
>> Hi,
>>
>> I need to unmarshal XML element value to a field of type Object. I also
>> would like JAXB implementation to automatically handle type information I
>> provide in XML with xsi:type attribute. The result would be an object of
>> corresponding type as defined by XML data types to Java classes mapping.
>>
>> Unfortunately, JAXB implementation that I am using (JAXB RI 2.2) seems to
>> ignore xsi:type in my case. It always creates an object of type String. I
>> am
>> wondering if I can get the desired result at all when using xsi:type
>> information.
>>
>> Here is a simple sample:
>>
>> <field name="field1" xsi:type="xs:integer"
>> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>> xmlns:xs="http://www.w3.org/2001/XMLSchema">1</field>
>>
>> @XmlRootElement(name = "field")
>> public class Field {
>>
>> private String name;
>>
>> private Object value;
>>
>> @XmlAttribute(name = "name")
>> public String getName() {
>> return name;
>> }
>>
>> public void setName(String name) {
>> this.name = name;
>> }
>>
>> @XmlValue
>> @XmlSchemaType(name = "anySimpleType")
>> public Object getValue() {
>> return value;
>> }
>>
>> public void setValue(Object value) {
>> this.value = value;
>> }
>> }
>> --
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>> http://old.nabble.com/Ummarshalling-to-Object-type-tp28425349p28425349.html
>> Sent from the java.net - jaxb users mailing list archive at Nabble.com.
>>
>>
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