PropertyBoxFormDataProvider.java 文件源码

/**
 * Get the {@link PropertySetRefIntrospector} instance to use.
 * @return The {@link PropertySetRefIntrospector} instance to use, from {@link ContextResolver} if available or the
 *         default one
 */
private PropertySetRefIntrospector getPropertySetRefIntrospector() {
    if (_propertySetRefIntrospector == null) {
        // init using a contextresolver, if available
        ContextResolver<PropertySetRefIntrospector> contextResolver = providers
                .getContextResolver(PropertySetRefIntrospector.class, MediaType.APPLICATION_FORM_URLENCODED_TYPE);
        if (contextResolver != null) {
            _propertySetRefIntrospector = contextResolver.getContext(PropertySetRefIntrospector.class);
        }
        if (_propertySetRefIntrospector == null) {
            // use default
            _propertySetRefIntrospector = PropertySetRefIntrospector.getDefault();
        }
    }
    return _propertySetRefIntrospector;
}