private void preComputeEnvironmentMapping()
{
if (cachedEnvironmentMapping == null)
{
final Configuration configuration = ClassicEngineBoot.getInstance().getGlobalConfig();
final Iterator propertyKeys = configuration.findPropertyKeys(ENV_MAPPING_KEY_PREFIX);
final LinkedHashMap<String,String> names = new LinkedHashMap<String,String>();
while (propertyKeys.hasNext())
{
final String key = (String) propertyKeys.next();
final String value = configuration.getConfigProperty(key);