+++ /dev/null
-/* java.lang.FilePermission
- Copyright (C) 1998, 2000 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.io;
-
-import java.security.*;
-
-
-public final class FilePermission extends Permission implements Serializable {
- private static final String CURRENT_DIRECTORY = System.getProperty("user.dir");
- private boolean usingPerms = false;
- private boolean readPerm = false;
- private boolean writePerm = false;
- private boolean executePerm = false;
- private boolean deletePerm = false;
- private String actionsString;
-
- private void cachePerms() {
- // While race conditions could occur, they don't matter at all.
-
- String action;
- int i = actionsString.indexOf(',');
- int startI = 0;
- while(i != -1) {
- action = actionsString.substring(startI,i);
- if(action.equals("read"))
- readPerm = true;
- else if(action.equals("write"))
- writePerm = true;
- else if(action.equals("execute"))
- executePerm = true;
- else if(action.equals("delete"))
- deletePerm = true;
-
- startI = i+1;
- i = actionsString.indexOf(',',startI);
- }
-
- action = actionsString.substring(startI);
- if(action.equals("read"))
- readPerm = true;
- else if(action.equals("write"))
- writePerm = true;
- else if(action.equals("execute"))
- executePerm = true;
- else if(action.equals("delete"))
- deletePerm = true;
- }
-
- /** Create a new FilePermission.
- ** @param pathExpression an expression specifying the paths this
- ** permission represents.
- ** @param actionsString a comma-separated list of the actions this
- ** permission represents.
- ** @XXX what to do when the file string is malformed?
- **/
- public FilePermission(String pathExpression, String actionsString)
- {
- super(pathExpression);
- this.actionsString = actionsString;
- }
-
- /** Get the actions this FilePermission supports.
- ** @return the String representing the actions this FilePermission supports.
- **/
- public String getActions() {
- return actionsString;
- }
-
- /** Get the hash code for this Object.<P>
- ** FilePermission's hash code is calculated as the exclusive or of the target
- ** String's hash code and the action String's hash code.
- ** @specnote Sun did not specify how to calculate the hash code; I made this up.
- ** @return the hash code for this Object.
- **/
- public int hashCode() {
- return getName().hashCode() ^ actionsString.hashCode();
- }
-
- /** Check two FilePermissions for semantic equality.
- ** Two FilePermissions are exactly equivalent if they have identical path
- ** expressions and have exactly the same access permissions.
- ** @param o the Object to compare to.
- ** @return whether the Objects are semantically equivalent.
- **/
- public boolean equals(Object o) {
- if(!(o instanceof FilePermission))
- return false;
- FilePermission p = (FilePermission)o;
- if(!usingPerms)
- cachePerms();
- if(!p.usingPerms)
- p.cachePerms();
-
- String f1 = getName();
- String f2 = p.getName();
-
- /* Compare names, taking into account if they refer to a
- * directory and one has a separator and the other does not.
- */
- if(f1.charAt(f1.length()) == File.separatorChar) {
- if(f2.charAt(f2.length()) == File.separatorChar) {
- if(!f2.equals(f1))
- return false;
- } else {
- if(!f2.equals(f1.substring(0,f1.length()-1)))
- return false;
- }
- } else {
- if(f2.charAt(f2.length()) == File.separatorChar) {
- if(!f1.equals(f2.substring(0,f2.length()-1)))
- return false;
- } else {
- if(!f1.equals(f2))
- return false;
- }
- }
- return readPerm == p.readPerm && writePerm == p.writePerm && executePerm == p.executePerm && deletePerm == p.deletePerm;
- }
-
- /** Check to see if this permission implies another.
- ** Permission A implies permission B if these things are all true:
- ** <OL>
- ** <LI>A and B are both FilePermissions.</LI>
- ** <LI>All possible files in B are included in A (possibly more are in A).</LI>
- ** <LI>All actions B supports, A also supports.</LI>
- ** </OL>
- ** @param p the Permission to compare against.
- ** @return whether this Permission implies p
- **/
- public boolean implies(Permission p) {
- FilePermission fp;
- if(!(p instanceof FilePermission))
- return false;
- fp = (FilePermission)p;
-
- String f1 = getName();
- String f2 = fp.getName();
- if(f1.charAt(0) != File.separatorChar) {
- f1 = CURRENT_DIRECTORY + f1;
- }
- if(f2.charAt(0) != File.separatorChar) {
- f2 = CURRENT_DIRECTORY + f2;
- }
-
- String sub1, sub2a, sub2b;
- switch(f1.charAt(f1.length() - 1)) {
- case '*':
- sub1 = f1.substring(0,f1.length() - 1); // chop off "*"
- if(f2.length() <= sub1.length()) {
- /* If it's smaller, there is no way it could be part of this directory.
- * If it's the same (or length - 1), it could be the same directory but
- * specifies access to the directory rather than the files in it.
- */
- return false;
- } else if(f2.charAt(sub1.length() - 1) == File.separatorChar) {
- /* Make sure the part before the "/" is the same */
- if(!f2.substring(0,sub1.length()).equals(sub1))
- return false;
- /* Make sure there are no subdirectories specified underneath this one */
- String sub2 = f2.substring(sub1.length()+1);
- if(f2.substring(sub1.length()+1).indexOf(File.separatorChar) != -1)
- return false;
- } else {
- /* Obviously not equal: f2 is either not a directory or is not
- * the same directory (its name continues further than we want)
- */
- return false;
- }
- break;
- case '-':
- sub1 = f1.substring(0,f1.length() - 2); // chop off "/-"
- if(f2.length() < sub1.length()) {
- /* If it's smaller, there is no way it could be part of this directory. */
- return false;
- } else if(f2.length() > sub1.length() && f2.charAt(sub1.length()) != File.separatorChar) {
- return false;
- } else if(!f2.substring(0,sub1.length()).equals(sub1))
- return false;
- break;
-/* Looks redundant with default case and won't compile anyway - arenn
- case File.separatorChar:
- if(f2.charAt(f2.length()) == File.separatorChar) {
- if(!f2.equals(f1))
- return false;
- } else {
- if(!f2.equals(f1.substring(0,f1.length()-1)))
- return false;
- }
- break;
-*/
- default:
- if(f2.charAt(f2.length()) == File.separatorChar) {
- if(!f1.equals(f2.substring(0,f2.length()-1)))
- return false;
- } else {
- if(!f1.equals(f2))
- return false;
- }
- break;
- }
-
- if(!usingPerms)
- cachePerms();
- if(!fp.usingPerms)
- fp.cachePerms();
-
- if(readPerm && !fp.readPerm)
- return false;
- if(writePerm && !fp.writePerm)
- return false;
- if(executePerm && !fp.executePerm)
- return false;
- if(deletePerm && !fp.deletePerm)
- return false;
-
- return true;
- }
-}
projects / msp430-gcc.git / blobdiff