Re: javax.jcr.NamespaceException

[Thomas Fromm]

On Thursday 12 February 2009 05:14, ken.p wrote:
> I ran to issue:
> Exception in thread "main" javax.jcr.NamespaceException: : is not a
> registered namespace
>
> when using IBM jdk, it works fine on Sun jdk. Any work around available as
> deployment environment will be on IBM jdk.

The problem is, that the IBM JDK allow no empty keys inside their property 
files.

There exists a issue for Jackrabbit, but ATM nobody wants to fix it.
I wrote an ugly workaround, which works for me.
(Normally you need also to extend/modify 
org.apache.jackrabbit.core.query.lucene.FileBasedNamespaceMappings.java, but 
thats not nessesary for me.)
Unfortunality the jackrabbit creators likes to use of private methods/members.
So extending their code is mostly impossible.

    public static class DefaultRepository extends RepositoryImpl implements 
Repository {

        public DefaultRepository(RepositoryConfig config) throws Exception {
            super(config);
        }

        protected NamespaceRegistryImpl createNamespaceRegistry(FileSystem fs) 
throws RepositoryException {
            return new MyNamespaceRegistryImpl(fs);
        }
    }

public class MyNamespaceRegistryImpl extends NamespaceRegistryImpl {


    protected MyNamespaceRegistryImpl(FileSystem nsRegStore)
            throws RepositoryException {
        super(nsRegStore);
    }

    public void unregisterNamespace(String prefix)
            throws NamespaceException, 
UnsupportedRepositoryOperationException,
            AccessDeniedException, RepositoryException {
        if("".equals(prefix)){
            return;
        }
        super.unregisterNamespace(prefix);
    }

    public String[] getPrefixes() throws RepositoryException {
        List<String> prefixList=new ArrayList<String>();
        for(String prefix : super.getPrefixes()){
            prefixList.add(prefix);
        }
        if(!prefixList.contains("")){
            prefixList.add("");
        }
        return prefixList.toArray(new String[0]);
    }

    public String[] getURIs() throws RepositoryException {
        List<String> uriList=new ArrayList<String>();
        for(String uri : super.getPrefixes()){
            uriList.add(uri);
        }
        if(!uriList.contains("")){
            uriList.add("");
        }
        return uriList.toArray(new String[0]);
    }

    public String getURI(String prefix) throws NamespaceException {
        if("".equals(prefix)){
            return "";
        }
        return super.getURI(prefix);
    }

    public String getPrefix(String uri) throws NamespaceException {
        if("".equals(uri)){
            return "";
        }
        return super.getPrefix(uri);
    }
}