urlprincipal.java

一个完整的XACML工程,学习XACML技术的好例子!

/*
* Copyright (c) 2000-2005, University of Salford
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without 
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this 
* list of conditions and the following disclaimer.
* 
* Redistributions in binary form must reproduce the above copyright notice, 
* this list of conditions and the following disclaimer in the documentation 
* and/or other materials provided with the distribution. 
*
* Neither the name of the University of Salford nor the names of its 
* contributors may be used to endorse or promote products derived from this 
* software without specific prior written permission. 
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
* AND ANY EXPRESS 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 COPYRIGHT OWNER OR CONTRIBUTORS BE 
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
* POSSIBILITY OF SUCH DAMAGE.
*/

package issrg.pba.rbac;

import issrg.utils.ParsedURL;

/**
 * This class implements a Principal interface, so it can be used as an
 * identifier. It also implements an Entry interface, so it can be used
 * for Domain matching as well.
 *
 * <p>Some of the methods do not have any description, because they simply
 * redirect the calls to ParsedURL object, so refer to the description of that
 * class to see the meaning of the results.
 *
 * @author A.Otenko
 */
public class URLPrincipal implements java.security.Principal, 
                                     issrg.utils.repository.Entry {
  ParsedURL pu;
  int port=-1; // no port has been specified

  protected URLPrincipal(){}

  /**
   * This constructor builds a URLPrincipal out of a URL string, and assumes
   * the defaul port is unknown (getPort() will return -1, if the URL does not
   * specify the port number).
   *
   * <p>This is equivalent to new URLPrincipal(url, -1);
   *
   * @param url is the string URL
   *
   * @throws BadURLException if the url is not a well-formed HTTP or FILE URL
   */
  public URLPrincipal(String url) throws BadURLException {
    this(url, -1);
  }

  /**
   * This constructor builds a URLPrincipal given a URL string, and a default 
   * port number.
   *
   * @param url is the string URL
   * @param defaultPort is the number of the default port to assume if URL does 
   *   not 
   *   specify any port number
   *
   * @throws BadURLException if the url is not a well-formed HTTP or FILE URL
   */
  public URLPrincipal(String url, int defaultPort) throws BadURLException {
    Exception e=null;

    pu=ParsedURL.parseURL(url);
    try{
      if (pu!=null)
        if (pu.getPort()!=null) port=Integer.parseInt(pu.getPort()); // try to parse the port number
        else port=defaultPort; // pu.getPort()==null - use default port
    } catch (NumberFormatException nfe){
      pu=null; // next line will throw an exception
      e=nfe;
    }

    if (pu==null) throw new BadURLException("Malformed URL: "+url, e); // embed root cause, if any
  }

  /**
   * This method returns a normalised URL (i.e.&nbsp;the path is without '.' and
   * '..' elements, etc.)
   */
  public String getName(){
    return pu.getNormalizedURL();
  }

  public java.security.Principal getEntryName(){
    return this;
  }


  public String getProtocol(){
    return pu.getProtocol();
  }

  public String getUserName(){
    return pu.getUserName();
  }

  public String getPassword(){
    return pu.getPassword();
  }

  public String getHost(){
    return pu.getHost();
  }

  /**
   * This method returns a port number. Returns -1, if no port has been 
   * specified
   * in the URL or in the constructor (use default).
   *
   * @return the port number, or -1, if no port has been specified in the URL
   */
  public int getPort(){
    return port;
  }

  public String [] getPath(){
    return pu.getPath();
  }

  public String [] getOriginalPath(){
    return pu.getOriginalPath();
  }

  public String getAnchor(){
    return pu.getAnchor();
  }

  public String getQuery(){
    return pu.getQuery();
  }

  /**
   * This method returns the whole original URL; normalised URL can be obtained
   * using getName() method.
   */
  public String getURL(){
    return pu.getURL();
  }

}