| /* |
| * 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.util.ArrayList; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Collection; |
| |
| import org.apache.karaf.shell.console.Completer; |
| |
| /** |
| * Completer which contains multipule completers and aggregates them together. |
| */ |
| public class AggregateCompleter implements Completer |
| { |
| private final Collection<Completer> completers; |
| |
| public AggregateCompleter(final Collection<Completer> completers) { |
| assert completers != null; |
| this.completers = completers; |
| } |
| |
| public int complete(final String buffer, final int cursor, final List candidates) { |
| // buffer could be null |
| assert candidates != null; |
| |
| List<Completion> completions = new ArrayList<Completion>(completers.size()); |
| |
| // Run each completer, saving its completion results |
| int max = -1; |
| for (Completer completer : completers) { |
| Completion completion = new Completion(candidates); |
| completion.complete(completer, buffer, cursor); |
| |
| // Compute the max cursor position |
| max = Math.max(max, completion.cursor); |
| |
| completions.add(completion); |
| } |
| |
| // Append candiates from completions which have the same cursor position as max |
| for (Completion completion : completions) { |
| if (completion.cursor == max) { |
| // noinspection unchecked |
| candidates.addAll(completion.candidates); |
| } |
| } |
| |
| return max; |
| } |
| |
| private class Completion |
| { |
| public final List<String> candidates; |
| |
| public int cursor; |
| |
| public Completion(final List candidates) { |
| assert candidates != null; |
| |
| // noinspection unchecked |
| this.candidates = new LinkedList<String>(candidates); |
| } |
| |
| public void complete(final Completer completer, final String buffer, final int cursor) { |
| assert completer != null; |
| |
| this.cursor = completer.complete(buffer, cursor, candidates); |
| } |
| } |
| } |