src/main/java/org/jboss/util/xml/catalog/Resolver.java
protected String resolveExternalSystem(String systemId, String resolver)
	throws MalformedURLException, IOException {
	Resolver r = queryResolver(resolver, "i2l", systemId, null);
	if (r != null) {
	    return r.resolveSystem(systemId);
	} else {
	    return null;
	}
    }
protected String resolveExternalSystem(String systemId, String resolver)
	throws MalformedURLException, IOException {
	Resolver r = queryResolver(resolver, "i2l", systemId, null);
	if (r != null) {
	    return r.resolveSystem(systemId);
	} else {
	    return null;
	}
    }
Query an external RFC2483 resolver for a system identifier.

@param systemId The system ID to locate.
@param resolver The name of the resolver to use.

@return The system identifier to use for the systemId.
@throws MalformedURLException
@throws IOException