JLine每行使用多字命令的示例

Question

我似乎無法找到每行使用多個命令的示例。

例如，假設我想寫一個類似於cisco ios的cli，其中您可能在一行上有多個級別的命令。

例如。第一個單詞可以是「show」，然後當你鍵入「show」並點擊標籤時，顯示下一組選項（cisco exmaple使用「？」來顯示列表）。

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 

我想用readCharacter讀取一次一個字符，然後分析該行到目前爲止有一次我看到一個空間。

是否有其他人對此類需求有任何Jline體驗？

Answer 1

使用https://github.com/jline/jline2/blob/master/src/test/java/jline/example/Example.java作爲參考，您可能想要嘗試以下操作。其背後的關鍵思想是使用AggregateCompleter類爲您完成所有選項的合併。

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); 
      } 

用上面的代碼運行修改過的Example.java後，輸出如下所示。

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

它可以通過使用AggregateCompleter來進行，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); 
}