in base/src/main/java/org/apache/commons/chain2/base/LookupCommand.java [359:380]
protected Command<K, V, C> getCommand(C context) {
Catalog<K, V, C> catalog = getCatalog(context);
Command<K, V, C> command;
String name = getCommandName(context);
if (name != null) {
command = catalog.getCommand(name);
if (command == null && !isOptional()) {
if (catalogName == null) {
throw new IllegalArgumentException
("Cannot find command '" + name
+ "' in default catalog");
} else {
throw new IllegalArgumentException
("Cannot find command '" + name
+ "' in catalog '" + catalogName + "'");
}
}
return command;
}
throw new IllegalArgumentException("No command name");
}