code: public boolean hasValue(String property, String value) {
  		boolean hasValue = false;
  		if (has()) {
  			Map<String, Object> fieldValues = buildFieldValues(property, value);
  			TResult result = getDao().queryForFieldValues(fieldValues);
  			try {
  				hasValue = result.getCount() > 0;
  			} finally {
  				result.close();
  			}
  		}
  		return hasValue;
  	}
docs: Check if the property has the value
  
  @param property
  property name
  @param value
  property value
  @return true if property has the value