public Object tryArgument(String arg) throws Exception {
try {
ArrayList<Object> retval = new ArrayList<Object>();
String[] values = arg.split(separator);
if (values.length == 0) {
throw new Exception("Invalid argument");
}
if (values.length == 1) {
return handler.tryArgument(values[0]);
}
if (values.length > maxEntries) {
throw new Exception(String.format("Cannot exceed %d entries", maxEntries));
}
for (String v : values) {
Object param = handler.tryArgument(v);
if (param == null) {
throw new Exception(String.format("Invalid member of list: %s", v));
}
retval.add(param);
}
return retval;
} catch (Exception e) {
throw e;
}
}
public String toUsageString(String prepend) {
StringBuilder builder = new StringBuilder();
builder.append(prepend);
builder.append(String.format("%s: %s", name, description));
builder.append("\n");
if (defaultValue != null) {
builder.append(prepend);
builder.append(String.format("\tDefault: %s", defaultValue.toString()));
builder.append("\n");
}
String handlerUsage = handler.toUsageString(prepend);
if (handlerUsage != null && handlerUsage.length() > 0) {
builder.append("\t");
builder.append(handlerUsage);
builder.append("\n");
}
return builder.toString();
}