DeployerValidator.java 文件源码

private void validateCollection(Field f, Object obj) throws IllegalArgumentException, IllegalAccessException {
    XmlType xtype = obj.getClass().getAnnotation(XmlType.class);
    if (xtype == null) {
        return;
    }
    String elementName = xtype.name();
    logger.debug(String.format("validating %s->%s", elementName, f.getName()));

    Collection l = (Collection) f.get(obj);
    XmlElement eat = f.getAnnotation(XmlElement.class);
    if (eat != null && (eat.required() && (l == null || l.isEmpty()))) {
        throw new IllegalArgumentException(String.format("field[%s] of element[%s] is mandatory, cannot be missed", f.getName(), elementName));
    }
    XmlAttribute aat = f.getAnnotation(XmlAttribute.class);
    if (aat != null && (aat.required() && (l == null || l.isEmpty()))) {
        throw new IllegalArgumentException(String.format("field[%s] of element[%s] is mandatory, cannot be missed", aat.name(), elementName));
    }

    if (l != null) {
        Object val = l.iterator().next();
        if (val != null) {
            validateObject(val);
        }
    }
}