OpenSAML user discussion

[Chad La Joie <>]

No, you don't have to use the default provider (and probably shouldn't) 
in order to create attribute values.  Instead you'd get the builder for 
whatever you want to use as an attribute value and build it using the 
element name AttributeValue.  So, for example, lets say you wanted to 
have a value that is a string.  Get the builder for the XSString object 
(our XMLObject that models the XML schema string type).  Then, instead 
of using the normal buildObject method use one of the ones that takes 
both the element name AND the schema type, for example 
buildObject(QName, QName), passing in the AttributeValue qname for the 
first argument and the XSString type for the second.

This way, when the object is marshalled you end up with something like

<saml2:AttributeValue xsi:type="xs:string">
   Some attribute value
</saml2:AttributeValue/>

Note that the proxy element only gets used if the library is unable to 
determine what the element actually contains.  By specifying the schema 
type (string) the library would appropriately unmarshall the above 
snippet into an XSString XMLObject.  If the type wasn't there it would 
have no way of knowing the type of the element and would fall back to 
the proxy.

Subash Devkota wrote:
> Hi all,
>
> I am using the latest java-saml2 codes from svn.
>
> I want  to build AttributeValue object and append it to Attribute. There 
> is no AttributeValueBuilder.
>
> https://spaces.internet2.edu/display/SHIB/OSTwoUsrManJavaLibIntro  page 
> under *Default Object Provider* section states that:
>
> In most cases developer's wont encounter this XMLObject. However, it's 
> common that this object will be used as the container for AttributeValue 
> elements.
>
>
> Scott and Chad,
> Does it mean, we need to use this default object provider for creating 
> AttributeValue object?
> I tried it in the following manner.
> In common-config.xml file, I found the entry
>    <BuilderClass className="org.opensaml.xml.ElementProxyBuilder" />
> and tried to create the object using the code:
>
>          org.opensaml.xml.ElementProxyBuilder proxyBuilder= new 
> org.opensaml.xml.ElementProxyBuilder();
>            AttributeValue attributeValue= (AttributeValue) 
> proxyBuilder.buildObject(SAMLConstants.SAML20_NS, 
> AttributeValue.DEFAULT_ELEMENT_LOCAL_NAME, SAMLConstants.SAML20_PREFIX);
>           But, I encounter the ClassCastException in second line.
>
> How can I create AttributeValue object?
>
> Thanks in advance
> Subash
>
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Chad La Joie             2052-C Harris Bldg
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