org.apache.struts.action.ActionErrors.
* * This tag has been enhanced from the original struts version to include * a header/footer that is used with each error message as well as a header * /footer for the error block as a whole. *
* The following optional message keys will be utilized if corresponding * messages exist for them in the application resources: *
null to return all errors.
*/
protected String property = null;
public String getProperty() {
return (this.property);
}
public void setProperty(String property) {
this.property = property;
}
// ------------------------------------------------------- Public Methods
/**
* Render the specified error messages if there are any.
*
* @exception JspException if a JSP exception has occurred
*/
public int doStartTag() throws JspException {
// Were any error messages specified?
ActionErrors errors = loadActionErrors();
if (errors == null || errors.empty())
return (EVAL_BODY_INCLUDE);
// Check for presence of header and footer message keys
boolean headerPresent =
RequestUtils.present(pageContext, bundle, locale, "errors.header");
boolean footerPresent =
RequestUtils.present(pageContext, bundle, locale, "errors.footer");
String messageHeader = RequestUtils.message(pageContext, bundle,
locale, "error.header");
String messageFooter = RequestUtils.message(pageContext, bundle,
locale, "error.footer");
// Render the error messages appropriately
StringBuffer results = new StringBuffer();
String message = null;
if (headerPresent)
message = RequestUtils.message(pageContext, bundle,
locale, "errors.header");
if (message != null) {
results.append(message);
results.append("\r\n");
}
Iterator reports = null;
if (property == null) {
reports = errors.get();
}
else {
reports = errors.get(property);
}
while (reports.hasNext()) {
ActionError report = (ActionError) reports.next();
message = RequestUtils.message(pageContext, bundle,
locale, report.getKey(),
report.getValues());
if (message != null) {
if (messageHeader != null) {
results.append(messageHeader);
}
results.append(message);
if (messageFooter != null) {
results.append(messageFooter);
}
results.append("\r\n");
}
}
message = null;
if (footerPresent)
message = RequestUtils.message(pageContext, bundle,
locale, "errors.footer");
if (message != null) {
results.append(message);
results.append("\r\n");
}
// Print the results to our output writer
ResponseUtils.write(pageContext, results.toString());
// Continue processing this page
return (EVAL_BODY_INCLUDE);
}
private ActionErrors loadActionErrors() {
ActionErrors errors = null;
try {
Object value = pageContext.getAttribute
(name, PageContext.REQUEST_SCOPE);
if (value == null) {
;
}
else if (value instanceof String) {
errors.add(ActionErrors.GLOBAL_ERROR,
new ActionError((String) value));
}
else if (value instanceof String[]) {
String keys[] = (String[]) value;
for (int i = 0; i < keys.length; i++)
errors.add(ActionErrors.GLOBAL_ERROR,
new ActionError(keys[i]));
}
else if (value instanceof ActionErrors) {
errors = (ActionErrors) value;
}
else {
JspException e =
new JspException("Cannot process ActionErrors instance of class "
+ value.getClass().getName());
RequestUtils.saveException(pageContext, e);
throw e;
}
}
catch (Exception e) {
;
}
return errors;
}
/**
* Release any acquired resources.
*/
public void release() {
super.release();
bundle = Action.MESSAGES_KEY;
locale = Action.LOCALE_KEY;
name = Action.ERROR_KEY;
property = null;
}
}