GsonJsonProvider.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_JSON_TYPE);
        if (contextResolver != null) {
            propertySetRefIntrospector = contextResolver.getContext(PropertySetRefIntrospector.class);
        }
        if (propertySetRefIntrospector == null) {
            // use default
            propertySetRefIntrospector = PropertySetRefIntrospector.getDefault();
        }
    }
    return propertySetRefIntrospector;
}