/** Returns visualized routing rules. */
@Override
public String toString() {
// Step 1/2: Dump routers and anyMethodRouter in order
final int numRoutes = size();
final List<String> methods = new ArrayList<String>(numRoutes);
final List<String> paths = new ArrayList<String>(numRoutes);
final List<String> targets = new ArrayList<String>(numRoutes);
// For router
for (Entry<HttpMethod, MethodlessRouter<T>> e : routers.entrySet()) {
HttpMethod method = e.getKey();
MethodlessRouter<T> router = e.getValue();
aggregateRoutes(method.toString(), router.first().routes(), methods, paths, targets);
aggregateRoutes(method.toString(), router.other().routes(), methods, paths, targets);
aggregateRoutes(method.toString(), router.last().routes(), methods, paths, targets);
}
// For anyMethodRouter
aggregateRoutes("*", anyMethodRouter.first().routes(), methods, paths, targets);
aggregateRoutes("*", anyMethodRouter.other().routes(), methods, paths, targets);
aggregateRoutes("*", anyMethodRouter.last().routes(), methods, paths, targets);
// For notFound
if (notFound != null) {
methods.add("*");
paths.add("*");
targets.add(targetToString(notFound));
}
// Step 2/2: Format the List into aligned columns: <method> <path> <target>
int maxLengthMethod = maxLength(methods);
int maxLengthPath = maxLength(paths);
String format = "%-" + maxLengthMethod + "s %-" + maxLengthPath + "s %s\n";
int initialCapacity = (maxLengthMethod + 1 + maxLengthPath + 1 + 20) * methods.size();
StringBuilder b = new StringBuilder(initialCapacity);
for (int i = 0; i < methods.size(); i++) {
String method = methods.get(i);
String path = paths.get(i);
String target = targets.get(i);
b.append(String.format(format, method, path, target));
}
return b.toString();
}
