RE: type and Java Class

[Vinh Nguyen (vinguye2)]

Hi,
Instead of just getting the extending type's class, is there a way to
actually get an instance of that type?  For example, the following will
not work:

TestType test = TestDocument.Factory.newTest();
test.getTypeExtensions().addNewExtension( testTypeClientExtension );

TestTypeClientExtension ext =
(TestTypeClientExtension)test.getTypeExtensions().getExtension(0);  //
ClassCastException!

So even if you insert an extending type, the composite object will only
return a new instance of the base type.  It doesn't even return the
actual object that was inserted.  Hencing, casting will not work.

There seems to be a disjoint in the extension pattern allowed in XML
schemas versus how XmlBeans implements the corresponding Java class
extension pattern.


 

-----Original Message-----
From: Cory Virok [mailto:[EMAIL PROTECTED] 
Sent: Thursday, November 15, 2007 8:05 AM
To: user@xmlbeans.apache.org
Subject: RE: type and Java Class

I've done the same thing. Basically, you need to get the SchemaParticle
that corresponds to the XmlObject's schema type, then get the Type of
that schema particle and finally, get the java class associated with
that type, (via
getJavaClass().)

I haven't actually tried this code so my apologies if it doesn't work...
XmlObject testTypeExtension =
test.getTest().getTypeExtensions().getExtensionArray()[0];

SchemaType testExtType = testTypeExtension.schemaType();
Class testExtClass = testExtType.getJavaClass();        //the Class
you're
interested in

Hope it helps/works!
cory

-----Original Message-----
From: cmoller [mailto:[EMAIL PROTECTED]
Sent: Wednesday, November 14, 2007 11:05 AM
To: user@xmlbeans.apache.org
Subject: xsi:type and Java Class


I am having trouble getting XmlBeans 1.0.4 to return the Java class I
want
from an XML document. The XSD defines a complex type containing a list
of an
abstract type. In another namespace I am defining a concrete extension
of
the abstract type. When I parse an xml document containing on of these
lists, it returns references to the abstract type's class, not the
concrete
type. If I change the list to a list of anyType instead of the abstract
type, I get back the expected class. Here are my XSD's:

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema";
            targetNamespace="http://domain/test";
            xmlns:test="http://domain/test";
            elementFormDefault="qualified">
    <xsd:complexType name="testType">
        <xsd:sequence>
            <xsd:element name="typeExtensions" minOccurs="0"
type="test:testTypeExtensions"/>
        </xsd:sequence>
    </xsd:complexType>
    <xsd:complexType name="testTypeExtensions">
        <xsd:sequence>
            <!--<xsd:element name="extension"
type="test:testTypeExtension"
maxOccurs="unbounded" minOccurs="0"></xsd:element>-->
            <xsd:element name="extension" type="xsd:anyType"
maxOccurs="unbounded" minOccurs="0"></xsd:element>
        </xsd:sequence>
    </xsd:complexType>
    <xsd:complexType name="testTypeExtension" abstract="true">
        <xsd:sequence/>
    </xsd:complexType>
    <xsd:element name="test" type="test:testType"/>
</xsd:schema>

****XSD #2**************************************

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema";
            targetNamespace="http://domain/test/ext";
            xmlns:test="http://domain/test";
            elementFormDefault="qualified">
    <xsd:import namespace="http://domain/test";
schemaLocation="test.xsd"></xsd:import>
    <xsd:complexType name="testTypeClientExtension">
        <xsd:complexContent>
            <xsd:extension base="test:testTypeExtension">
                <xsd:sequence>
                    <xsd:element name="extensionElement"
type="xsd:string"></xsd:element>
                </xsd:sequence>
            </xsd:extension>
        </xsd:complexContent>
    </xsd:complexType>
</xsd:schema>

**** JAVA CODE ******************

Here is the Java code that I am using to check the behavior.

        String xmlText = "<test:test xmlns:test=\"http://domain/test\";
xmlns:ext=\"http://domain/test/ext\";
xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\";><test:typeExtens
ions>
<test:extension
xsi:type=\"ext:testTypeClientExtension\"/></test:typeExtensions></test:t
est>"
;

        TestDocument test = (TestDocument)
XmlObject.Factory.parse(xmlText);
        XmlObject testTypeExtension =
test.getTest().getTypeExtensions().getExtensionArray()[0];

        System.out.println("testTypeClientExtension.getClass().getName()
- "
+ testTypeExtension.getClass().getName());

If I use anyType in the list in the xsd, the system out will display
TestTypeClientExtension as the class. If I use TestTypeExtension, it
will
display TestTypeExtension. I want to get back an instance of the class
based
on the xsi:type.

Thanks in advance for any help.
-- 
View this message in context:
http://www.nabble.com/xsi%3Atype-and-Java-Class-tf4807282.html#a13754000
Sent from the Xml Beans - User mailing list archive at Nabble.com.


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