public StructuredDataElement format(final LogEvent event) {
final Map<String, String> map = new HashMap<String, String>();
for (final Map.Entry<String, List<PatternFormatter>> entry : delegateMap.entrySet()) {
final StringBuilder buffer = new StringBuilder();
for (final PatternFormatter formatter : entry.getValue()) {
formatter.format(event, buffer);
}
map.put(entry.getKey(), buffer.toString());
}
return new StructuredDataElement(map, discardIfEmpty);
}
private void appendMessage(final StringBuilder buffer, final LogEvent event) {
final Message message = event.getMessage();
// This layout formats StructuredDataMessages instead of delegating to the Message itself.
final String text =
(message instanceof StructuredDataMessage)
? message.getFormat()
: message.getFormattedMessage();
if (text != null && text.length() > 0) {
buffer.append(' ').append(escapeNewlines(text, escapeNewLine));
}
if (exceptionFormatters != null && event.getThrown() != null) {
final StringBuilder exception = new StringBuilder(LF);
for (final PatternFormatter formatter : exceptionFormatters) {
formatter.format(event, exception);
}
buffer.append(escapeNewlines(exception.toString(), escapeNewLine));
}
if (includeNewLine) {
buffer.append(LF);
}
}