JLine示例每行使用多字命令

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,你可以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.

有没有其他人有这种要求的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.它背后的关键思想是使用AggregateCompleter该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);
            }

在运行带有上述内容的修改后的Example.java之后,输出将如下所示.

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>