| /* |
| * Copyright 2001-2004 The Apache Software Foundation. |
| * |
| * Licensed 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.axis.utils; |
| |
| import java.io.File; |
| import java.net.URL; |
| import java.util.HashSet; |
| import java.util.StringTokenizer; |
| |
| /** |
| * Class URLHashSet |
| * |
| * @author Davanum Srinivas (dims@apache.org) |
| */ |
| public class URLHashSet extends HashSet { |
| |
| /** |
| * Adds the specified URL to this set if it is not already present. |
| * |
| * @param url url to be added to this set. |
| * @return true if the set did not already contain the specified element. |
| */ |
| public boolean add(URL url) { |
| return super.add(normalize(url)); |
| } |
| |
| /** |
| * Removes the given URL from this set if it is present. |
| * |
| * @param url url to be removed from this set, if present. |
| * @return true if the set contained the specified element. |
| */ |
| public boolean remove(URL url) { |
| return super.remove(normalize(url)); |
| } |
| |
| /** |
| * Returns true if this set contains the specified element. |
| * |
| * @param url url whose presence in this set is to be tested. |
| * @return true if this set contains the specified element. |
| */ |
| public boolean contains(URL url) { |
| return super.contains(normalize(url)); |
| } |
| |
| /** |
| * if the url points to a file then make sure we cleanup ".." "." etc. |
| * |
| * @param url url to be normalized |
| * @return normalized url |
| */ |
| public static URL normalize(URL url) { |
| if (url.getProtocol().equals("file")) { |
| try { |
| File f = new File(cleanup(url.getFile())); |
| if(f.exists()) |
| return f.toURL(); |
| } catch (Exception e) {} |
| } |
| return url; |
| } |
| |
| /** |
| * Normalize a uri containing ../ and ./ paths. |
| * |
| * @param uri The uri path to normalize |
| * @return The normalized uri |
| */ |
| private static String cleanup(String uri) { |
| String[] dirty = tokenize(uri, "/\\", false); |
| int length = dirty.length; |
| String[] clean = new String[length]; |
| boolean path; |
| boolean finished; |
| |
| while (true) { |
| path = false; |
| finished = true; |
| for (int i = 0, j = 0; (i < length) && (dirty[i] != null); i++) { |
| if (".".equals(dirty[i])) { |
| // ignore |
| } else if ("..".equals(dirty[i])) { |
| clean[j++] = dirty[i]; |
| if (path) { |
| finished = false; |
| } |
| } else { |
| if ((i + 1 < length) && ("..".equals(dirty[i + 1]))) { |
| i++; |
| } else { |
| clean[j++] = dirty[i]; |
| path = true; |
| } |
| } |
| } |
| if (finished) { |
| break; |
| } else { |
| dirty = clean; |
| clean = new String[length]; |
| } |
| } |
| StringBuffer b = new StringBuffer(uri.length()); |
| |
| for (int i = 0; (i < length) && (clean[i] != null); i++) { |
| b.append(clean[i]); |
| if ((i + 1 < length) && (clean[i + 1] != null)) { |
| b.append("/"); |
| } |
| } |
| return b.toString(); |
| } |
| |
| /** |
| * Constructs a string tokenizer for the specified string. All characters |
| * in the delim argument are the delimiters for separating tokens. |
| * If the returnTokens flag is true, then the delimiter characters are |
| * also returned as tokens. Each delimiter is returned as a string of |
| * length one. If the flag is false, the delimiter characters are skipped |
| * and only serve as separators between tokens. Then tokenizes the str |
| * and return an String[] array with tokens. |
| * |
| * @param str a string to be parsed |
| * @param delim the delimiters |
| * @param returnTokens flag indicating whether to return the delimiters |
| * as tokens |
| * |
| * @return array with tokens |
| */ |
| private static String[] tokenize(String str, String delim, boolean returnTokens) { |
| StringTokenizer tokenizer = new StringTokenizer(str, delim, returnTokens); |
| String[] tokens = new String[tokenizer.countTokens()]; |
| int i = 0; |
| while (tokenizer.hasMoreTokens()) { |
| tokens[i] = tokenizer.nextToken(); |
| i++; |
| } |
| return tokens; |
| } |
| } |