Build Relative URL Path : URL « Network Protocol « Java

Home
Java
1.2D Graphics GUI
2.3D
3.Advanced Graphics
4.Ant
5.Apache Common
6.Chart
7.Class
8.Collections Data Structure
9.Data Type
10.Database SQL JDBC
11.Design Pattern
12.Development Class
13.EJB3
14.Email
15.Event
16.File Input Output
17.Game
18.Generics
19.GWT
20.Hibernate
21.I18N
22.J2EE
23.J2ME
24.JDK 6
25.JNDI LDAP
26.JPA
27.JSP
28.JSTL
29.Language Basics
30.Network Protocol
31.PDF RTF
32.Reflection
33.Regular Expressions
34.Scripting
35.Security
36.Servlets
37.Spring
38.Swing Components
39.Swing JFC
40.SWT JFace Eclipse
41.Threads
42.Tiny Application
43.Velocity
44.Web Services SOA
45.XML
Java » Network Protocol » URLScreenshots 
Build Relative URL Path
    
/*
Copyright (c) 2003 eInnovation Inc. All rights reserved

This library is free software; you can redistribute it and/or modify it under the terms
of the GNU Lesser General Public License as published by the Free Software Foundation;
either version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Lesser General Public License for more details.
*/

/*--

 Copyright (C) 2001-2002 Anthony Eden.
 All rights reserved.

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:

 1. Redistributions of source code must retain the above copyright
    notice, this list of conditions, and the following disclaimer.

 2. Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions, and the disclaimer that follows
    these conditions in the documentation and/or other materials
    provided with the distribution.

 3. The name "JPublish" must not be used to endorse or promote products
    derived from this software without prior written permission.  For
    written permission, please contact me@anthonyeden.com.

 4. Products derived from this software may not be called "JPublish", nor
    may "JPublish" appear in their name, without prior written permission
    from Anthony Eden (me@anthonyeden.com).

 In addition, I request (but do not require) that you include in the
 end-user documentation provided with the redistribution and/or in the
 software itself an acknowledgement equivalent to the following:
     "This product includes software developed by
      Anthony Eden (http://www.anthonyeden.com/)."

 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 POSSIBILITY OF SUCH DAMAGE.

 For more information on JPublish, please see <http://www.jpublish.org/>.

 */


/**
 * Utility class for working with request paths.
 *
 @author Anthony Eden
 */
public final class PathUtilities
{
  private static final String WILDCARD = "*";

  /**
   * Builds a path that might be within or one above a parent path String ret =
   * buildRelative("../junk.txt","/a/b/c/something.html") Will return /a/b/junk.txt This code
   * only returns a changed endPart if it starts with a dot .
   *
   @param endPart
   @param fullParentPath
   *
   @return
   */
  public static String buildRelative(String endPart, String fullParentPath)
  {
    String basepath = null;
    if fullParentPath != null)
    {
      fullParentPath = fullParentPath.replace('\\','/');
    }
    //TODO: Make this work with random number of dots
    
    //if we are dealing with relative path then we need to make sure the basepath ends with a /
    if (endPart.startsWith("."&& (fullParentPath != null&& !fullParentPath.endsWith("/"))
    {
      //so with this function /examples/benchmark -> /examples/benchmark/
      //is this parent a directory or a file, lets check for a .
      int lastslash = fullParentPath.lastIndexOf("/");
      int lastperiod = fullParentPath.lastIndexOf(".");

      if (lastslash > lastperiod)
      {
        //must be a directory       
        basepath = fullParentPath;
      }
    }

    if (basepath == null)
    {
      basepath = extractDirectoryPath(fullParentPath);
    }
    if basepath == null )
    {
      basepath = "";
    }

    String relative = endPart;

    if (endPart.startsWith(".."))
    {
      //strip the filename
      if (basepath.endsWith("/"))
      {
        basepath = basepath.substring(0, basepath.length() 1);
      }

      basepath = basepath.substring(0, basepath.lastIndexOf("/"));
      relative = basepath + endPart.substring(2);
    }
    else if (endPart.startsWith("."))
    {
      relative = basepath + endPart.substring(1);
    }
    if !relative.startsWith("/"))
    {
      relative = "/" + relative;
    }
    return relative;
  }
  /**
   * Get the parent of the given path.
   *
   @param path The path for which to retrieve the parent
   *
   @return The parent path. /sub/sub2/index.html -> /sub/sub2 If the given path is the root path ("/" or ""), return a blank string.
   */
  public static String extractDirectoryPath(String path)
  {
    if ((path == null|| path.equals(""|| path.equals("/"))
    {
      return "";
    }

    int lastSlashPos = path.lastIndexOf('/');

    if (lastSlashPos >= 0)
    {
      return path.substring(0, lastSlashPos)//strip off the slash
    }
    else
    {
      return ""//we expect people to add  + "/somedir on their own
    }
  }
}

   
    
    
    
  
Related examples in the same category
1.Creating a URL with a single string.
2.Creating a URL With components
3.Converting Between a Filename Path and a URL
4.URL Constructor Test
5.URL Encode Test
6.Get URL Content
7.Get URL Parts
8.Read from a URL
9.Convert a URL to a URI
10.Converting Between a URL and a URI
11.Convert an absolute URI to a URL
12.URL Equality
13.Parsing a URL
14.URL Request
15.URL Get
16.A URL Retrieval Example
17.URL Reader
18.URL Connection ReaderURL Connection Reader
19.Using URLConnection
20.Parse URLParse URL
21.Resolve a relative URL
22.sends e-mail using a mailto: URLsends e-mail using a mailto: URL
23.Convert the absolute URI to a URL object
24.Convert URI to URL
25.Get parts of a url
26.Checks, whether the URL uses a file based protocol.
27.Add Parameter to URL
28.Returns the anchor value of the given URL
29.Extracts the file name from the URL.
30.Creates a relative url by stripping the common parts of the the url.
31.Checks, whether the URL points to the same service. A service is equal if the protocol, host and port are equal.
32.Extracts the base URL from the given URL by stripping the query and anchor part.
33.Returns true if the URL represents a path, and false otherwise.
34.Parse Port
35.Parse Host
36.Given a URL check if its a jar url(jar:!/archive) and if it is, extract the archive entry into the given dest directory and return a file URL to its location
37.check the validity of url pattern according to the spec.
38.A collection of File, URL and filename utility methods
39.Checks that the protocol://host:port part of two URLs are equal
40.Create valid URL from a system id
41.Extract URL File Name
42.Extract the URL page name from the given path
43.Get Domain Name
44.Get Locale From String
45.Get URL Last Modified
46.Get the name of the parent of the given URL path
47.Get the parent of the given URL path
48.Has URLContent Changed
49.Is URL a local file
50.Normalize an URL
51.Normalizes an URL
52.Resolve a relative URL string against an absolute URL string
53.ResourceBundle String manager
54.Save URL contents to a file
55.URL Path: standardize the creation of mutation of path-like structures
56.Utility class for building URLs
57.Add Default Port to a URL If Missing
58.Get Relative Path To URL
59.Download from a URL and save to a file
java2s.com  | Contact Us | Privacy Policy
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.