| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.karaf.shell.console.completer; |
| |
| import java.lang.reflect.Field; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.apache.felix.gogo.commands.basic.AbstractCommand; |
| import org.apache.felix.gogo.runtime.Closure; |
| import org.apache.felix.gogo.runtime.CommandProxy; |
| import org.apache.felix.gogo.runtime.CommandSessionImpl; |
| import org.apache.felix.service.command.CommandSession; |
| import org.apache.felix.service.command.Function; |
| import org.apache.karaf.shell.console.CompletableFunction; |
| import org.apache.karaf.shell.console.Completer; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.ServiceReference; |
| import org.apache.karaf.shell.console.jline.CommandSessionHolder; |
| |
| /** |
| * Like the {@link org.apache.karaf.shell.console.completer.CommandsCompleter} but does not use OSGi but is |
| * instead used from the non-OSGi {@link org.apache.karaf.shell.console.Main} |
| */ |
| public class CommandsCompleter implements Completer { |
| |
| private CommandSession session; |
| private final List<Completer> completers = new ArrayList<Completer>(); |
| private final Set<String> commands = new HashSet<String>(); |
| |
| public CommandsCompleter() { |
| this(CommandSessionHolder.getSession()); |
| } |
| |
| public CommandsCompleter(CommandSession session) { |
| this.session = session; |
| } |
| |
| |
| public int complete(String buffer, int cursor, List<String> candidates) { |
| if (session == null) { |
| session = CommandSessionHolder.getSession(); |
| } |
| checkData(); |
| int res = new AggregateCompleter(completers).complete(buffer, cursor, candidates); |
| Collections.sort(candidates); |
| return res; |
| } |
| |
| protected synchronized void checkData() { |
| // Copy the set to avoid concurrent modification exceptions |
| // TODO: fix that in gogo instead |
| Set<String> names = new HashSet<String>((Set<String>) session.get(CommandSessionImpl.COMMANDS)); |
| if (!names.equals(commands)) { |
| commands.clear(); |
| completers.clear(); |
| |
| // get command aliases |
| Set<String> aliases = this.getAliases(); |
| completers.add(new StringsCompleter(aliases)); |
| |
| // add argument completers for each command |
| for (String command : names) { |
| Function function = (Function) session.get(command); |
| function = unProxy(function); |
| if (function instanceof AbstractCommand) { |
| completers.add(new ArgumentCompleter(session, (AbstractCommand) function, command)); |
| } |
| commands.add(command); |
| } |
| } |
| } |
| |
| /** |
| * Get the aliases defined in the console session. |
| * |
| * @return the aliases set |
| */ |
| private Set<String> getAliases() { |
| Set<String> vars = (Set<String>) session.get(null); |
| Set<String> aliases = new HashSet<String>(); |
| for (String var : vars) { |
| Object content = session.get(var); |
| if (content instanceof Closure) { |
| aliases.add(var); |
| } |
| } |
| return aliases; |
| } |
| |
| protected Function unProxy(Function function) { |
| try { |
| if (function instanceof CommandProxy) { |
| Field contextField = function.getClass().getDeclaredField("context"); |
| Field referenceField = function.getClass().getDeclaredField("reference"); |
| contextField.setAccessible(true); |
| referenceField.setAccessible(true); |
| BundleContext context = (BundleContext) contextField.get(function); |
| ServiceReference reference = (ServiceReference) referenceField.get(function); |
| Object target = context.getService(reference); |
| try { |
| if (target instanceof Function) { |
| function = (Function) target; |
| } |
| } finally { |
| context.ungetService(reference); |
| } |
| } |
| } catch (Throwable t) { |
| } |
| return function; |
| } |
| |
| } |
| |