| /* |
| * 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.ftpserver.command.impl.listing; |
| |
| import java.util.StringTokenizer; |
| |
| /** |
| * <strong>Internal class, do not use directly.</strong> |
| * |
| * Parses a list argument (e.g. for LIST or NLST) into a {@link ListArgument} |
| * |
| * @author <a href="http://mina.apache.org">Apache MINA Project</a> |
| */ |
| public class ListArgumentParser { |
| |
| /** |
| * Parse the argument |
| * |
| * @param argument |
| * The argument string |
| * @return The parsed argument |
| * @throws IllegalArgumentException |
| * If the argument string is incorrectly formated |
| */ |
| public static ListArgument parse(String argument) { |
| String file = "./"; |
| String options = ""; |
| String pattern = "*"; |
| |
| // find options and file name (may have regular expression) |
| if (argument != null) { |
| argument = argument.trim(); |
| StringBuffer optionsSb = new StringBuffer(4); |
| StringBuffer fileSb = new StringBuffer(16); |
| StringTokenizer st = new StringTokenizer(argument, " ", true); |
| while (st.hasMoreTokens()) { |
| String token = st.nextToken(); |
| |
| if (fileSb.length() != 0) { |
| // file name started - append to file name buffer |
| fileSb.append(token); |
| } else if (token.equals(" ")) { |
| // delimiter and file not started - ignore |
| continue; |
| } else if (token.charAt(0) == '-') { |
| // token and file name not started - append to options |
| // buffer |
| if (token.length() > 1) { |
| optionsSb.append(token.substring(1)); |
| } |
| } else { |
| // filename - append to the filename buffer |
| fileSb.append(token); |
| } |
| } |
| |
| if (fileSb.length() != 0) { |
| file = fileSb.toString(); |
| } |
| options = optionsSb.toString(); |
| } |
| |
| int slashIndex = file.lastIndexOf('/'); |
| if (slashIndex == -1) { |
| if (containsPattern(file)) { |
| pattern = file; |
| file = "./"; |
| } |
| } else if (slashIndex != (file.length() - 1)) { |
| String after = file.substring(slashIndex + 1); |
| |
| if (containsPattern(after)) { |
| pattern = file.substring(slashIndex + 1); |
| file = file.substring(0, slashIndex + 1); |
| } |
| |
| if (containsPattern(file)) { |
| throw new IllegalArgumentException( |
| "Directory path can not contain regular expression"); |
| } |
| } |
| |
| if ("*".equals(pattern) || "".equals(pattern)) { |
| pattern = null; |
| } |
| |
| return new ListArgument(file, pattern, options.toCharArray()); |
| } |
| |
| private static boolean containsPattern(String file) { |
| return file.indexOf('*') > -1 || file.indexOf('?') > -1 |
| || file.indexOf('[') > -1; |
| |
| } |
| } |