| /* ProtectionDomain.java -- A security domain |
| Copyright (C) 1998 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| package java.security; |
| |
| /** |
| * This class represents a group of classes, along with the permissions |
| * they are granted. The classes are identified by a <code>CodeSource</code>. |
| * Thus, any class loaded from the specified <code>CodeSource</code> is |
| * treated as part of this domain. The set of permissions is represented |
| * by a <code>PermissionCollection</code>. |
| * <p> |
| * Every class in the system will belong to one and only one |
| * <code>ProtectionDomain</code>. |
| * |
| * @version 0.0 |
| * |
| * @author Aaron M. Renn (arenn@urbanophile.com) |
| */ |
| public class ProtectionDomain |
| { |
| /** |
| * This is the <code>CodeSource</code> for this protection domain |
| */ |
| private CodeSource code_source; |
| |
| /** |
| * This is the set of permissions granted to this domain |
| */ |
| private PermissionCollection perms; |
| |
| /** |
| * This method initializes a new instance of <code>ProtectionDomain</code> |
| * representing the specified <code>CodeSource</code> and permission set. |
| * No permissions may be added to the <code>PermissionCollection</code> |
| * and this contructor will call the <code>setReadOnly</code> method on |
| * the specified permission set. |
| * |
| * @param code_source The <code>CodeSource</code> for this domain |
| * @param perms The permission set for this domain |
| * |
| * @see java.security.PermissionCollection#setReadOnly() |
| */ |
| public ProtectionDomain(CodeSource code_source, PermissionCollection perms) |
| { |
| this.code_source = code_source; |
| this.perms = perms; |
| if (perms != null) |
| perms.setReadOnly(); |
| } |
| |
| /** |
| * This method returns the <code>CodeSource</code> for this domain. |
| * |
| * @return This domain's <code>CodeSource</code>. |
| */ |
| public final CodeSource getCodeSource() |
| { |
| return code_source; |
| } |
| |
| /** |
| * This method returns the set of permissions granted to this domain. |
| * |
| * @return The permission set for this domain |
| */ |
| public final PermissionCollection getPermissions() |
| { |
| return perms; |
| } |
| |
| /** |
| * This method tests whether or not the specified <code>Permission</code> is |
| * implied by the set of permissions granted to this domain. |
| * |
| * @param perm The <code>Permission</code> to test. |
| * |
| * @return <code>true</code> if the specified <code>Permission</code> is implied for this domain, <code>false</code> otherwise. |
| */ |
| public boolean implies(Permission perm) |
| { |
| PermissionCollection pc = getPermissions(); |
| if (pc == null) |
| return (false); |
| |
| return (pc.implies(perm)); |
| } |
| |
| /** |
| * This method returns a <code>String</code> representation of this |
| * object. It will print the <code>CodeSource</code> and |
| * permission set associated with this domain. |
| * |
| * @return A <code>String</code> representation of this object. |
| */ |
| public String toString() |
| { |
| String linesep = System.getProperty("line.separator"); |
| StringBuffer sb = new StringBuffer(""); |
| sb.append("ProtectionDomain (" + linesep); |
| if (code_source == null) |
| sb.append("CodeSource:null" + linesep); |
| else |
| sb.append(code_source + linesep); |
| sb.append(perms); |
| sb.append(linesep + ")" + linesep); |
| |
| return sb.toString(); |
| } |
| } |