Android Open Source - sms-smap-gateway Model Validator

From Project

License

The source code is released under:

GNU General Public License

If you think the Android project sms-smap-gateway listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.

Java Source Code

package com.android.smap.api.models.validator;
/*  w w  w .  j av a  2 s .  c o m*/
import java.lang.reflect.Field;
import java.util.List;

import android.util.Log;

public class ModelValidator {

  private static final String  TAG  = ModelValidator.class.getSimpleName();

  /**
   * Validates a given model object. Attach @Required to any fields that
   * should not be null in your model class. Once you have a model object,
   * call this method to determine if any of those fields are null.
   * 
   * @param o
   *            The model object.
   * @return false if any @Required fields are null. true otherwise.
   */
  public static boolean isModelValid(Object o) {
    if (o == null) {
      return false;
    }

    Field[] fields = o.getClass().getFields();

    for (Field field : fields) {
      Required required = field.getAnnotation(Required.class);

      if (required != null) {
        if (!isRequiredFieldValid(o, field)) {
          return false;
        }
      }
    }

    return true;
  }

  private static boolean isRequiredFieldValid(Object parent, Field field) {
    try {
      Object required = field.get(parent);

      if (required == null) {
        Log.e(TAG, "null object found for field " + field.getName());
        return false;
      }

      if (required instanceof List) {
        List<?> list = (List<?>) required;

        for (Object listItem : list) {
          if (!isModelValid(listItem)) {
            return false;
          }
        }
      } else if (!isModelValid(required)) {
        return false;
      }
    }
    catch (IllegalArgumentException e) {
      Log.e(TAG, "Object not compatible with the Field", e);
      return false;
    }
    catch (IllegalAccessException e) {
      Log.e(TAG, "security risk : cannot access field", e);
      return false;
    }

    return true;
  }
}

Java Source Code List