Source Code : Build a relative path to the given base path

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Build a relative path to the given base path

   
/*
  * JBoss, Home of Professional Open Source
  * Copyright 2005, JBoss Inc., and individual contributors as indicated
  * by the @authors tag. See the copyright.txt in the distribution for a
  * full listing of individual contributors.
  *
  * This 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 software 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.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this software; if not, write to the Free
  * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
  */


import java.io.File;
import java.io.IOException;

public class Main{
  
  /**
   * Build a relative path to the given base path.
   * @param base - the path used as the base
   * @param path - the path to compute relative to the base path
   * @return A relative path from base to path
   * @throws IOException
   */ 
  public static String findRelativePath(String base, String path)
     throws IOException
  {
     String a = new File(base).getCanonicalFile().toURI().getPath();
     String b = new File(path).getCanonicalFile().toURI().getPath();
     String[] basePaths = a.split("/");
     String[] otherPaths = b.split("/");
     int n = 0;
     for(; n < basePaths.length && n < otherPaths.length; n ++)
     {
        if( basePaths[n].equals(otherPaths[n]) == false )
           break;
     }
     System.out.println("Common length: "+n);
     StringBuffer tmp = new StringBuffer("../");
     for(int m = n; m < basePaths.length - 1; m ++)
        tmp.append("../");
     for(int m = n; m < otherPaths.length; m ++)
     {
        tmp.append(otherPaths[m]);
        tmp.append("/");
     }

     return tmp.toString();
  }
}

   
    
    
  

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