/**
* Get a message from the first TextProvider encountered in the stack. If the first TextProvider
* doesn't provide the message the default message is returned.
*
* <p>The search for a TextProvider is iterative from the root of the stack.
*
* <p>This method was refactored from {@link org.apache.struts2.components.Text} to use a
* consistent implementation across UIBean components.
*
* @param key the message key in the resource bundle
* @param defaultMessage the message to return if not found (evaluated for OGNL)
* @param args an array args to be used in a {@link java.text.MessageFormat} message
* @param stack the value stack to use for finding the text
* @param searchStack search stack for the key
* @return the message if found, otherwise the defaultMessage
*/
public static String getText(
String key, String defaultMessage, List<Object> args, ValueStack stack, boolean searchStack) {
String msg = null;
TextProvider tp = null;
for (Object o : stack.getRoot()) {
if (o instanceof TextProvider) {
tp = (TextProvider) o;
msg = tp.getText(key, null, args, stack);
break;
}
}
if (msg == null) {
// evaluate the defaultMesage as an OGNL expression
if (searchStack) msg = stack.findString(defaultMessage);
if (msg == null) {
// use the defaultMessage literal value
msg = defaultMessage;
}
if (LOG.isWarnEnabled()) {
if (tp != null) {
LOG.warn(
"The first TextProvider in the ValueStack ("
+ tp.getClass().getName()
+ ") could not locate the message resource with key '"
+ key
+ "'");
} else {
LOG.warn(
"Could not locate the message resource '"
+ key
+ "' as there is no TextProvider in the ValueStack.");
}
if (defaultMessage.equals(msg)) {
LOG.warn(
"The default value expression '"
+ defaultMessage
+ "' was evaluated and did not match a property. The literal value '"
+ defaultMessage
+ "' will be used.");
} else {
LOG.warn(
"The default value expression '" + defaultMessage + "' evaluated to '" + msg + "'");
}
}
}
return msg;
}
protected String getErrorMessage(ActionInvocation invocation) {
Object action = invocation.getAction();
if (action instanceof TextProvider) {
return ((TextProvider) action).getText(INVALID_TOKEN_MESSAGE_KEY, DEFAULT_ERROR_MESSAGE);
}
return textProvider.getText(INVALID_TOKEN_MESSAGE_KEY, DEFAULT_ERROR_MESSAGE);
}
@Override
public String intercept(ActionInvocation invocation) throws Exception {
String result = this.resultName;
try {
result = invocation.invoke();
} catch (AppException e) {
Object action = invocation.getAction();
if (action instanceof TextProvider) {
TextProvider tp = (TextProvider) action;
Result error = new Result(e.getExCode(), tp.getText("ex." + e.getExCode()), null);
HttpServletRequest request = ServletActionContext.getRequest();
request.setAttribute(Result.RET, error.getRet());
request.setAttribute(Result.MSG, error.getMsg());
if (LOG.isDebugEnabled()) {
LOG.debug("Catch a Appexception and write error to request = " + error.toString());
}
}
}
return result;
}