| /* |
| * 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.zookeeper; |
| |
| import java.util.Collections; |
| import java.util.List; |
| import jline.console.completer.Completer; |
| |
| class JLineZNodeCompleter implements Completer { |
| |
| private ZooKeeper zk; |
| |
| public JLineZNodeCompleter(ZooKeeper zk) { |
| this.zk = zk; |
| } |
| |
| @SuppressWarnings({"unchecked", "rawtypes"}) |
| public int complete(String buffer, int cursor, List candidates) { |
| // Guarantee that the final token is the one we're expanding |
| buffer = buffer.substring(0, cursor); |
| String token = ""; |
| if (!buffer.endsWith(" ")) { |
| String[] tokens = buffer.split(" "); |
| if (tokens.length != 0) { |
| token = tokens[tokens.length - 1]; |
| } |
| } |
| |
| if (token.startsWith("/")) { |
| return completeZNode(buffer, token, candidates); |
| } |
| return completeCommand(buffer, token, candidates); |
| } |
| |
| private int completeCommand(String buffer, String token, List<String> candidates) { |
| for (String cmd : ZooKeeperMain.getCommands()) { |
| if (cmd.startsWith(token)) { |
| candidates.add(cmd); |
| } |
| } |
| return buffer.lastIndexOf(" ") + 1; |
| } |
| |
| private int completeZNode(String buffer, String token, List<String> candidates) { |
| String path = token; |
| int idx = path.lastIndexOf("/") + 1; |
| String prefix = path.substring(idx); |
| try { |
| // Only the root path can end in a /, so strip it off every other prefix |
| String dir = idx == 1 ? "/" : path.substring(0, idx - 1); |
| List<String> children = zk.getChildren(dir, false); |
| for (String child : children) { |
| if (child.startsWith(prefix)) { |
| candidates.add(child); |
| } |
| } |
| } catch (InterruptedException e) { |
| return 0; |
| } catch (KeeperException e) { |
| return 0; |
| } |
| Collections.sort(candidates); |
| return candidates.size() == 0 ? buffer.length() : buffer.lastIndexOf("/") + 1; |
| } |
| |
| } |