Пример #1
0
  // This prevents the dreaded KeyValueCoding null object exception, for say key paths:
  // object.entityName
  // Should just return null instead of throwing.
  public static Object contextValueForKeyNoInferenceNoException(D2WContext c, String keyPath) {
    Object result = null;
    int i = keyPath.indexOf(".");
    if (i == -1) {
      result = c.valueForKeyNoInference(keyPath);
    } else {
      String first = keyPath.substring(0, i);
      String second = keyPath.substring(i + 1);
      result = c.valueForKeyNoInference(first);
      if (result != null) {
        // Optimized for two paths deep

        try {
          if (second.indexOf(".") == -1) {
            result = NSKeyValueCoding.Utility.valueForKey(result, second);
          } else {
            NSArray parts = NSArray.componentsSeparatedByString(second, ".");
            for (int j = 0; j < parts.count(); j++) {
              String part = (String) parts.objectAtIndex(j);
              result = NSKeyValueCoding.Utility.valueForKey(result, part);
              if (result == null) break;
            }
          }
        } catch (NSKeyValueCoding.UnknownKeyException e) {
          if (log.isDebugEnabled()) {
            log.debug(
                "keyPath {} is not available for context with entity: {}; task: {}",
                keyPath,
                c.entity().name(),
                c.task());
          }
          return null;
        }
      }
    }
    return result;
  }
Пример #2
0
 public static void finalizeContext(D2WContext context) {
   if (context != null) context.pageFinalized();
 }