java.security.PermissionsHash Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package java.security;
import java.util.Enumeration;
import java.util.Hashtable;
/**
* A default {@code PermissionCollection} implementation that uses a hashtable.
* Each hashtable entry stores a Permission object as both the key and the
* value.
*
* This {@code PermissionCollection} is intended for storing "neutral"
* permissions which do not require special collection.
*/
final class PermissionsHash extends PermissionCollection {
private static final long serialVersionUID = -8491988220802933440L;
private final Hashtable perms = new Hashtable();
/**
* Adds the argument to the collection.
*
* @param permission
* the permission to add to the collection.
*/
public void add(Permission permission) {
perms.put(permission, permission);
}
/**
* Returns an enumeration of the permissions in the receiver.
*
* @return Enumeration the permissions in the receiver.
*/
public Enumeration elements() {
return perms.elements();
}
/**
* Indicates whether the argument permission is implied by the permissions
* contained in the receiver.
*
* @return boolean true if the argument permission is implied
* by the permissions in the receiver, and false if
* it is not.
* @param permission
* java.security.Permission the permission to check
*/
public boolean implies(Permission permission) {
for (Enumeration elements = elements(); elements.hasMoreElements();) {
if (((Permission)elements.nextElement()).implies(permission)) {
return true;
}
}
return false;
}
}