+++ /dev/null
-/* BasicPermission.java -- Implements a simple named permission.
- Copyright (C) 1998, 1999 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;
-
-import java.io.Serializable;
-import java.util.Hashtable;
-import java.util.Enumeration;
-
-/**
- * This class implements a simple model for named permissions without an
- * associated action list. That is, either the named permission is granted
- * or it is not.
- * <p>
- * It also supports trailing wildcards to allow the
- * easy granting of permissions in a hierarchical fashion. (For example,
- * the name "org.gnu.*" might grant all permissions under the "org.gnu"
- * permissions hierarchy). The only valid wildcard character is a '*'
- * which matches anything. It must be the rightmost element in the
- * permission name and must follow a '.' or else the Permission name must
- * consist of only a '*'. Any other occurrence of a '*' is not valid.
- * <p>
- * This class ignores the action list. Subclasses can choose to implement
- * actions on top of this class if desired.
- *
- * @version 0.1
- *
- * @author Aaron M. Renn (arenn@urbanophile.com)
- */
-public abstract class BasicPermission extends java.security.Permission
- implements Serializable
- // FIXME extends with fully qualified classname as workaround for gcj 3.0.4
-{
- /**
- * This method initializes a new instance of <code>BasicPermission</code>
- * with the specified name. If the name contains an illegal wildcard
- * character, an exception is thrown.
- *
- * @param name The name of this permission.
- *
- * @exception IllegalArgumentException If the name contains an invalid wildcard character
- * @exception NullPointerException If the name is null
- */
- public BasicPermission(String name)
- throws IllegalArgumentException, NullPointerException
- {
- super(name);
-
- if (name.indexOf("*") != -1)
- {
- if (!name.endsWith(".*") && !name.equals("*"))
- throw new IllegalArgumentException("Bad wildcard: " + name);
-
- if (name.indexOf("*") != name.lastIndexOf("*"))
- throw new IllegalArgumentException("Bad wildcard: " + name);
- }
- }
-
- /**
- * This method initializes a new instance of <code>BasicPermission</code>
- * with the specified name. If the name contains an illegal wildcard
- * character, an exception is thrown. The action list passed to this
- * form of the constructor is ignored.
- *
- * @param name The name of this permission.
- * @param actions The list of actions for this permission - ignored in this class.
- *
- * @exception IllegalArgumentException If the name contains an invalid wildcard character
- * @exception NullPointerException If the name is null
- */
- public BasicPermission(String name, String actions)
- throws IllegalArgumentException, NullPointerException
- {
- // ignore actions
- this(name);
- }
-
- /**
- * This method tests to see if the specified permission is implied by
- * this permission. This will be true if the following conditions are met:
- * <p>
- * <ul>
- * <li>The specified object is an instance of <code>BasicPermission</code>,
- * or a subclass.
- * <li>The name of the specified permission is identical to this permission's
- * name or the name of the specified permission satisfies a wildcard match
- * on this permission.
- * </ul>
- *
- * @param perm The <code>Permission</code> object to test against.
- *
- * @return <code>true</code> if the specified permission is implied by this one or <code>false</code> otherwise.
- */
- public boolean implies(Permission perm)
- {
- if (!(perm instanceof BasicPermission))
- return false;
-
- String otherName = perm.getName();
- String name = getName();
-
- if (name.equals(otherName))
- return true;
-
- int last = name.length() - 1;
- if (name.charAt(last) == '*'
- && otherName.startsWith(name.substring(0, last)))
- return true;
-
- return false;
- }
-
- /**
- * This method tests to see if this object is equal to the specified
- * <code>Object</code>. This will be true if and only if the specified
- * object meets the following conditions:
- * <p>
- * <ul>
- * <li>It is an instance of <code>BasicPermission</code>, or a subclass.
- * <li>It has the same name as this permission.
- * </ul>
- *
- * @param obj The <code>Object</code> to test for equality against this object
- *
- * @return <code>true</code> if the specified <code>Object</code> is equal to this object or <code>false</code> otherwise.
- */
- public boolean equals(Object obj)
- {
- if (!(obj instanceof BasicPermission))
- return (false);
-
- if (!getName().equals(((BasicPermission) obj).getName()))
- return (false);
-
- return (true);
- }
-
- /**
- * This method returns a hash code for this permission object. The hash
- * code returned is the value returned by calling the <code>hashCode</code>
- * method on the <code>String</code> that is the name of this permission.
- *
- * @return A hash value for this object
- */
- public int hashCode()
- {
- return (getName().hashCode());
- }
-
- /**
- * This method returns a list of the actions associated with this
- * permission. This method always returns the empty string ("") since
- * this class ignores actions.
- *
- * @return The action list.
- */
- public String getActions()
- {
- return ("");
- }
-
- /**
- * This method returns an instance of <code>PermissionCollection</code>
- * suitable for storing <code>BasicPermission</code> objects. This returns
- * be a sub class of <code>PermissionCollection</code>
- * that allows for an efficient and consistent implementation of
- * the <code>implies</code> method. The collection doesn't handle subclasses
- * of BasicPermission correctly; they must override this method.
- *
- * @return A new empty <code>PermissionCollection</code> object.
- */
- public PermissionCollection newPermissionCollection()
- {
- return new PermissionCollection()
- {
- Hashtable permissions = new Hashtable();
- boolean allAllowed = false;
-
- public void add(Permission permission)
- {
- if (isReadOnly())
- throw new IllegalStateException("readonly");
-
- BasicPermission bp = (BasicPermission) permission;
- String name = bp.getName();
- if (name.equals("*"))
- allAllowed = true;
- permissions.put(name, bp);
- }
-
- public boolean implies(Permission permission)
- {
- if (!(permission instanceof BasicPermission))
- return false;
-
- if (allAllowed)
- return true;
-
- BasicPermission toImply = (BasicPermission) permission;
- String name = toImply.getName();
- if (name.equals("*"))
- return false;
-
- int prefixLength = name.length();
- if (name.endsWith("*"))
- prefixLength -= 2;
-
- while (true)
- {
- if (permissions.get(name) != null)
- return true;
-
- prefixLength = name.lastIndexOf('.', prefixLength);
- if (prefixLength < 0)
- return false;
- name = name.substring(0, prefixLength + 1) + '*';
- }
- }
-
- public Enumeration elements()
- {
- return permissions.elements();
- }
- };
- }
-}
projects / msp430-gcc.git / blobdiff