if (node == null)
return input;
final String fmt = node.textValue();
final FormatAttribute attr = attributes.get(fmt);
if (attr == null) {
report.warn(input.newMessage().put("domain", "validation")
.put("keyword", "format")
.setMessage(bundle.getMessage("warn.format.notSupported"))
.putArgument("attribute", fmt));
return input;
}
final NodeType type = context.getInstanceType();
if (!attr.supportedTypes().contains(type))
return input;
final List<KeywordValidator> validators = Lists.newArrayList(input);
validators.add(formatValidator(attr));