private ValidatorInfo parseValidator(ComponentCtrl compCtrl, String propName) {
final Collection<Annotation> annos = compCtrl.getAnnotations(propName, VALIDATOR_ANNO);
if (annos.size() == 0) return null;
if (annos.size() > 1) {
throw new IllegalSyntaxException(
"Allow only one validator for " + propName + " of " + compCtrl);
}
final Annotation anno = annos.iterator().next();
ValidatorInfo info = new ValidatorInfo();
Map<String, String[]> args = null;
for (final Iterator<Entry<String, String[]>> it = anno.getAttributes().entrySet().iterator();
it.hasNext(); ) {
final Entry<String, String[]> entry = it.next();
final String tag = entry.getKey();
final String[] tagExpr = entry.getValue();
if ("value".equals(tag)) {
info.expr = testString(compCtrl, propName, tag, tagExpr);
} else { // other unknown tag, keep as arguments
if (args == null) {
args = new HashMap<String, String[]>();
}
args.put(tag, tagExpr);
}
}
if (Strings.isBlank(info.expr)) {
throw new IllegalSyntaxException(
"Must specify a validator for " + propName + " of " + compCtrl);
}
info.args = args == null ? null : parsedArgs(args);
return info;
}
