Question

我似乎无法找到每行使用多个命令的示例。

例如，假设我想写一个类似于cisco ios的cli，你可能在一行上有多个级别的命令。

例如。第一个单词可以是“show”，然后当你输入“show”并点击tab时，会显示下一组选项（cisco exmaple使用“？”来显示列表）。

eg:
gw1#show ?
  aaa                   Show AAA values
  access-expression     List access expression
  access-lists          List access lists
  accounting            Accounting data for active sessions
  adjacency             Adjacent nodes
  ..

gw1#show ip ?
  access-lists         List IP access lists
  accounting           The active IP accounting database
  admission            Network Admission Control information
  aliases              IP alias table
  arp                  IP ARP table
  ..

gw1#show ip interface ?
  ATM                 ATM interface
  Async               Async interface
  BVI                 Bridge-Group Virtual Interface
  CDMA-Ix             CDMA Ix interface
  ..

gw1#show ip interface

我正在考虑使用readCharacter一次读取一个字符，然后在看到空格后解析到目前为止的行。

有没有其他人对此类要求有任何Jline经验？

Answer 1

使用https://github.com/jline/jline2/blob/master/src/test/java/jline/example/Example.java作为参考，您可能需要尝试以下操作。其背后的关键思想是使用AggregateCompleter类为您完成所有选项的合并。

List<Completer> completors = new LinkedList<Completer>();
                    completors.add(
                            new AggregateCompleter(
                                    new ArgumentCompleter(new StringsCompleter("show"), new NullCompleter()),
                                    new ArgumentCompleter(new StringsCompleter("show"), new StringsCompleter("aaa", "access-expression", "access-lists", "accounting", "adjancey"), new NullCompleter()),
                                    new ArgumentCompleter(new StringsCompleter("show"), new StringsCompleter("ip"), new StringsCompleter("access-lists", "accounting", "admission", "aliases", "arp"), new NullCompleter()),
                                    new ArgumentCompleter(new StringsCompleter("show"), new StringsCompleter("ip"), new StringsCompleter("interface"), new StringsCompleter("ATM", "Async", "BVI"), new NullCompleter())
                                    )
                            );
            for (Completer c : completors) {
                reader.addCompleter(c);
            }

使用上面的内容运行修改后的Example.java后，输出如下所示。

prompt> show 
show    
prompt> show 
aaa                 access-expression   access-lists        accounting          adjancey            ip                  
prompt> show ip 
ip    
prompt> show ip 
access-lists   accounting     admission      aliases        arp            interface      
prompt> show ip interface 
ATM     Async   BVI     
prompt> show ip interface A
ATM     Async   
prompt> show ip interface A
ATM     Async   
prompt> show ip interface ATM 
======>"show ip interface ATM "
prompt>

Answer 2

可以使用AggregateCompleter完成，如下所示：

ConsoleReader reader = new MultiWordConsoleReader();
List<Completer> completers = new ArrayList<Completer>();

completors.add(new AggregateCompleter(new StringsCompleter("show"), new StringsCompleter("aaa", "access"), new NullCompleter()));
completors.add(new AggregateCompleter(new StringsCompleter("show"), new StringsCompleter("ip"), new StringsCompleter("accounting", "arp"), new NullCompleter()));

for (Completer c : completors) {
    reader.addCompleter(c);
}

JLine示例每行使用多字命令

2 个答案: