/**
* Validate fields common to this class and subclasses.
*
* @param command article add command (or subclass)
* @param errors spring errors object to populate
* @return true if validation completed, false if processing should stop
*/
protected final boolean validateCommon(ArticleAddCommand command, Errors errors) {
if (command == null) {
errors.reject(ERROR_ARTICLE_NULL, "Null data received");
// do not continue processing, as this will lead to NPEs later
return false;
}
String title = command.getTitle();
if (title == null || title.trim().length() == 0) {
errors.rejectValue("title", ERROR_ARTICLE_TITLE_REQUIRED, "title required");
}
String permalink = command.getPermalink();
if (permalink != null && !permalink.matches("[a-z0-9\\-]+")) {
errors.rejectValue("permalink", ERROR_ARTICLE_PERMALINK_INVALID, "permalink invalid");
}
ContentType contentType = command.getContentType();
if (contentType == null) {
errors.rejectValue(
"contentType", ERROR_ARTICLE_CONTENT_TYPE_REQUIRED, "content type required");
}
String content = command.getContent();
if (content == null || content.trim().length() == 0) {
errors.rejectValue("content", ERROR_ARTICLE_CONTENT_REQUIRED, "content required");
} else if (contentType != null) {
// validate the content
validateContent(
errors,
content,
contentType.getMimeType(),
"content",
ERROR_ARTICLE_CONTENT_INVALID,
"content invalid");
}
String summary = command.getSummary();
if (summary != null) {
// validate summary
if (summary.length() > maximumSummaryLength) {
errors.rejectValue(
"summary",
ERROR_ARTICLE_SUMMARY_TOO_LONG,
new Object[] {new Integer(maximumSummaryLength)},
"summary too long");
} else {
validateContent(
errors,
summary,
contentType.getMimeType(),
"summary",
ERROR_ARTICLE_SUMMARY_INVALID,
"summary invalid");
}
}
return true;
}
/**
* Validates the given command.
*
* @param obj {@code ArticleAddCommand} to validate
* @param errors Spring Errors object to populate
*/
@Override
public void validate(Object obj, Errors errors) {
ArticleAddCommand command = (ArticleAddCommand) obj;
if (!validateCommon(command, errors)) {
return;
}
if (errors.getFieldErrorCount("permalink") == 0) {
String permalink = command.getPermalink();
if (permalink != null) {
// look for article with the same permalink
Article prev = articleBusiness.findArticleByPermalink(permalink);
if (prev != null) {
errors.rejectValue("permalink", ERROR_ARTICLE_PERMALINK_EXISTS, "permalink exists");
}
}
}
}