15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.security;
  27 
  28 import java.util.ArrayList;
  29 import java.util.Collections;
  30 import java.util.Enumeration;
  31 import java.util.List;
  32 import java.util.Map;
  33 import java.util.Objects;
  34 import java.util.WeakHashMap;
  35 import jdk.internal.misc.JavaSecurityAccess;
  36 import jdk.internal.misc.SharedSecrets;
  37 import sun.security.action.GetPropertyAction;
  38 import sun.security.provider.PolicyFile;
  39 import sun.security.util.Debug;
  40 import sun.security.util.FilePermCompat;
  41 import sun.security.util.SecurityConstants;
  42 
  43 /**
  44  * The ProtectionDomain class encapsulates the characteristics of a domain,
  45  * which encloses a set of classes whose instances are granted a set
  46  * of permissions when being executed on behalf of a given set of Principals.
  47  * <p>
  48  * A static set of permissions can be bound to a ProtectionDomain when it is
  49  * constructed; such permissions are granted to the domain regardless of the
  50  * Policy in force. However, to support dynamic security policies, a
  51  * ProtectionDomain can also be constructed such that it is dynamically
  52  * mapped to a set of permissions by the current Policy whenever a permission
  53  * is checked.
  54  *
  55  * @author Li Gong
  56  * @author Roland Schemers

  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.security;
  27 
  28 import java.util.ArrayList;
  29 import java.util.Collections;
  30 import java.util.Enumeration;
  31 import java.util.List;
  32 import java.util.Map;
  33 import java.util.Objects;
  34 import java.util.WeakHashMap;
  35 import jdk.internal.access.JavaSecurityAccess;
  36 import jdk.internal.access.SharedSecrets;
  37 import sun.security.action.GetPropertyAction;
  38 import sun.security.provider.PolicyFile;
  39 import sun.security.util.Debug;
  40 import sun.security.util.FilePermCompat;
  41 import sun.security.util.SecurityConstants;
  42 
  43 /**
  44  * The ProtectionDomain class encapsulates the characteristics of a domain,
  45  * which encloses a set of classes whose instances are granted a set
  46  * of permissions when being executed on behalf of a given set of Principals.
  47  * <p>
  48  * A static set of permissions can be bound to a ProtectionDomain when it is
  49  * constructed; such permissions are granted to the domain regardless of the
  50  * Policy in force. However, to support dynamic security policies, a
  51  * ProtectionDomain can also be constructed such that it is dynamically
  52  * mapped to a set of permissions by the current Policy whenever a permission
  53  * is checked.
  54  *
  55  * @author Li Gong
  56  * @author Roland Schemers