001 /***************************************************************************** 002 * Copyright (C) NanoContainer Organization. All rights reserved. * 003 * ------------------------------------------------------------------------- * 004 * The software in this package is published under the terms of the BSD * 005 * style license a copy of which has been included with this distribution in * 006 * the LICENSE.txt file. * 007 *****************************************************************************/ 008 package org.nanocontainer; 009 010 import java.io.Serializable; 011 import java.net.URL; 012 import java.security.Permission; 013 import java.security.PermissionCollection; 014 import java.security.Permissions; 015 import java.util.ArrayList; 016 import java.util.List; 017 018 /** 019 * ClassPathElement denotes an element in a classpath allowing to grant permissions. 020 * 021 * @author Paul Hammant 022 */ 023 public class ClassPathElement implements Serializable { 024 025 private final URL url; 026 private PermissionCollection permissionCollection; 027 private final List permissions = new ArrayList(); 028 029 public ClassPathElement(URL url) { 030 this.url = url; 031 } 032 033 public Permission grantPermission(Permission permission) { 034 if (permission == null) { 035 throw new NullPointerException(); 036 } 037 permissions.add(permission); 038 return permission; 039 } 040 041 public URL getUrl() { 042 return url; 043 } 044 045 public PermissionCollection getPermissionCollection() { 046 if (permissionCollection == null) { 047 permissionCollection = new Permissions(); 048 for (int i = 0; i < permissions.size(); i++) { 049 Permission permission = (Permission) permissions.get(i); 050 permissionCollection.add(permission); 051 } 052 } 053 return permissionCollection; 054 } 055 056 public String toString() { 057 return "[" + System.identityHashCode(this) + " " + url + " " + permissions.size() +"]"; 058 } 059 060 }