private Map<String, Object> mergeBindings(
final Context context, final Bindings request, final Bindings... scopes) {
Set<String> safeAttributes = null != request ? request.keySet() : Collections.EMPTY_SET;
Map<String, Object> scope = new HashMap<String, Object>();
for (Map<String, Object> next : scopes) {
if (null == next) {
continue;
}
for (Map.Entry<String, Object> entry : next.entrySet()) {
if (scope.containsKey(entry.getKey()) || safeAttributes.contains(entry.getKey())) {
continue;
}
scope.put(entry.getKey(), entry.getValue());
}
}
// Make lazy deep copy
if (!scope.isEmpty()) {
scope =
new LazyMap<String, Object>(
new InnerMapFactory(
scope,
new OperationParameter(context, "DEFAULT", engine.getPersistenceConfig())));
}
if (null == request || request.isEmpty()) {
return scope;
} else if (scope.isEmpty()) {
return request;
} else {
request.putAll(scope);
return request;
}
}
