Create a common base class for all the JCA 1.6 implementations, like

JCA16Base

which contains the following:

private boolean metadataComplete;
private List<String> requiredWorkContexts;

public boolean isMetadataComplete()

{ return metadataComplete; }

@XmlAttribute(required=true)
public void setMetadataComplete(boolean metadataComplete)

{ this.metadataComplete = metadataComplete; }

public List<String> getRequiredWorkContexts()

{ return requiredWorkContexts; }

@XmlElement(name = "required-work-context")
public void setRequiredWorkContexts(List<String> requiredWorkContexts)

{ this.requiredWorkContexts = requiredWorkContexts; }

This will eliminate the need to type cast to each implementation specific class.

(Using trunk snapshot)