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Thread: Re: instantiate given a schema type
Re: instantiate given a schema type
user name
 2007-10-22 13:40:46 

  


  

    Have you looked at the SchemaTypeLoader APIs

http://xmlbeans.apache.org/docs/2.2.0/reference/org/apache/xmlbeans/SchemaTypeLoader.html#newInstance(org.apache.xmlbeans.SchemaType,%20org.apache.xmlbeans.XmlOptions)

-jacobd


On 10/22/07, Cory Virok < cvirokvmware.com">cvirokvmware.com> wrote:

Given only a SchemaType object, is there a way to instantiate a new XmlObject
that the SchemaType represents?
I have it working but my solution is clunky and uses reflection... There's
gotta be a better way!


I want to do something like this:

SchemaType someType = getFooSchemaType();
Foo foo = (Foo) newInstanceFromSchemaType(someType);

Currently, I have this:

<;code>
&nbsp;   ; &nbsp; &nbsp;//children[i] is an SchemaParticle


&nbsp; &nbsp; &nbsp;   ;//objClass is now the Class obj that represents the *interface* to
the object I really want...
&nbsp; &nbsp;   ; &nbsp;Class objClass = children[i].getType().getJavaClass();
 ; &nbsp; &nbsp; &nbsp; // Make the assumption that XMLbeans will always

&nbsp;   ; &nbsp; &nbsp;// create an inner "Factory" class!
&nbsp; &nbsp; &nbsp;   ;Class innerFactory = objClass.getClasses()[0];
   ; &nbsp; &nbsp; Method newInstanceMeth =
innerFactory.getDeclaredMethod("newInstance&quot;,

new Class[0]);


 &nbsp;   ; &nbsp; XmlObject childObj = (XmlObject) newInstanceMeth.invoke(null, null);
<;/code>

Thanks,
cory

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    RE: instantiate given a schema type
  


  

     user name

     2007-10-22 14:25:19
  


  

    

  


  

    





That looks like it’s exactly what I need…; However, I need to get
the new instance into a working XML document. Trying to do this via the DOM API
is giving me a “Child to add is from another document” error. 



 



So, now the question is, if I have 2 XmlObjects and I *know*
the first one is a parent element to the second one, how can I do the
equivalent of DOM’s “appendChild()&#8221; method but with the XmlObject interface?



 



Something like:




 



<code&gt;



 &nbsp; &nbsp; &nbsp; &nbsp;   ; &nbsp; &nbsp; XmlObject parent = getParentObject();



SchemaTypeLoader loader =
XmlBeans.getContextTypeLoader();



XmlObject child =
loader.newInstance(getSomeSchemaType(), null);



 



 &nbsp; &nbsp; &nbsp; &nbsp;   ; &nbsp; &nbsp; //HereR17;s what I *want* to do



 &nbsp; &nbsp; &nbsp; &nbsp;   ; &nbsp; &nbsp; parent.appendChild(child);



assert(parent.validate());   ;
//Should always be OK since I know getSomeSchemaType() will always return an
XmlObject that is a child of parent



</code&gt;



 



Thanks,



cory



 






From: Jacob Danner
[mailto:jacob.dannergmail.com] 

Sent: Monday, October 22, 2007 11:41 AM

To: userxmlbeans.apache.org


Subject: Re: instantiate given a schema type






 




Have you looked at the
SchemaTypeLoader APIs

http://xmlbeans.apache.org/docs/2.2.0/reference/org/apache/xmlbeans/SchemaTypeLoader.html#newInstance(org.apache.xmlbeans.SchemaType,%20org.apache.xmlbeans.XmlOptions)



-jacobd






On 10/22/07, Cory Virok <vmware.com">cvirokvmware.com> wrote:



Given only a SchemaType object,
is there a way to instantiate a new XmlObject

that the SchemaType represents?

I have it working but my solution is clunky and uses reflection... There's

gotta be a better way!



I want to do something like this:




SchemaType someType = getFooSchemaType();


Foo foo = (Foo) newInstanceFromSchemaType(someType);



Currently, I have this:




<code&gt;

   ; &nbsp; &nbsp; //children[i] is an
SchemaParticle 



&nbsp; &nbsp; &nbsp; &nbsp; //objClass is now the Class obj
that represents the *interface* to

the object I really want...

  ; &nbsp; &nbsp; &nbsp;Class objClass =
children[i].getType().getJavaClass();

  ; &nbsp; &nbsp; &nbsp;// Make the assumption that
XMLbeans will always 

 &nbsp;   ; &nbsp; // create an inner
&quot;Factory&quot; class!

&nbsp;   ; &nbsp; &nbsp;Class innerFactory =
objClass.getClasses()[0];

&nbsp;   ; &nbsp; &nbsp;Method newInstanceMeth =

innerFactory.getDeclaredMethod("newInstance&quot;,



new Class[0]); 



&nbsp; &nbsp; &nbsp; &nbsp; XmlObject childObj =
(XmlObject) newInstanceMeth.invoke(null, null);

&lt;/code>;



Thanks,

cory



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