Java String Normalize normalize(String uri)

Description

Normalize a uri containing ../ and ./ paths.

License

Apache License

Parameter

Parameter	Description
uri	The uri path to normalize

Return

The normalized uri

Declaration

public static String normalize(String uri) 

Method Source Code

//package com.java2s;
/*/*  w  w w.j a  v a  2 s.co  m*/
 * 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.
 */

import java.util.*;

public class Main {
    /**
     * Normalize a uri containing ../ and ./ paths.
     *
     * @param uri The uri path to normalize
     * @return The normalized uri
     */
    public static String normalize(String uri) {
        if ("".equals(uri)) {
            return uri;
        }
        int leadingSlashes;
        for (leadingSlashes = 0; leadingSlashes < uri.length()
                && uri.charAt(leadingSlashes) == '/'; ++leadingSlashes) {
            // FIXME: this block is empty!!
        }
        boolean isDir = (uri.charAt(uri.length() - 1) == '/');
        StringTokenizer st = new StringTokenizer(uri, "/");
        LinkedList clean = new LinkedList();
        while (st.hasMoreTokens()) {
            String token = st.nextToken();
            if ("..".equals(token)) {
                if (!clean.isEmpty() && !"..".equals(clean.getLast())) {
                    clean.removeLast();
                    if (!st.hasMoreTokens()) {
                        isDir = true;
                    }
                } else {
                    clean.add("..");
                }
            } else if (!".".equals(token) && !"".equals(token)) {
                clean.add(token);
            }
        }
        StringBuffer sb = new StringBuffer();
        while (leadingSlashes-- > 0) {
            sb.append('/');
        }
        for (Iterator it = clean.iterator(); it.hasNext();) {
            sb.append(it.next());
            if (it.hasNext()) {
                sb.append('/');
            }
        }
        if (isDir && sb.length() > 0 && sb.charAt(sb.length() - 1) != '/') {
            sb.append('/');
        }
        return sb.toString();
    }
}

Related

1. normalize(String string)
2. normalize(String text)
3. normalize(String text)
4. normalize(String text)
5. normalize(String text)
6. normalize(String value)
7. normalize(String value, Locale locale)
8. normalizeCutter(String cutter, int numDigits)
9. normalizeDose(String dose)