1f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 2f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Licensed to the Apache Software Foundation (ASF) under one or more 3f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * contributor license agreements. See the NOTICE file distributed with 4f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * this work for additional information regarding copyright ownership. 5f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The ASF licenses this file to You under the Apache License, Version 2.0 6f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * (the "License"); you may not use this file except in compliance with 7f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * the License. You may obtain a copy of the License at 8f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 9f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 10f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 11f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 12f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 13f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * See the License for the specific language governing permissions and 15f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * limitations under the License. 16f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 17f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 18f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectpackage java.io; 19f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 20f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport java.security.Permission; 21f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport java.security.PermissionCollection; 22f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport java.util.Enumeration; 23f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport java.util.Vector; 24f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 25f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/** 26f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Collects {@link FilePermission} objects and allows to query whether a 27f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * particular permission is implied by it. 28f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 29f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectfinal class FilePermissionCollection extends PermissionCollection implements 30f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Serializable { 31f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 32f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project private static final long serialVersionUID = 2202956749081564585L; 33f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 34f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Vector<Permission> permissions = new Vector<Permission>(); 35f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 36f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 37f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Construct a new FilePermissionCollection 38f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 39f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public FilePermissionCollection() { 40f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project super(); 41f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 42f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 43f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 44f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Add a permission object to the permission collection. 45f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 46f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @param permission 47f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * the FilePermission object to add to the collection. 48f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @throws IllegalArgumentException 49f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * if {@code permission} is not an instance of 50f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * {@code FilePermission}. 51f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @throws IllegalStateException 52f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * if this collection is read-only. 53f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @see java.security.PermissionCollection#add(java.security.Permission) 54f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 55f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project @Override 56f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public void add(Permission permission) { 57f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (isReadOnly()) { 58f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project throw new IllegalStateException(); 59f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 60f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (permission instanceof FilePermission) { 61f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project permissions.addElement(permission); 62f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 63f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project throw new IllegalArgumentException(permission.toString()); 64f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 65f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 66f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 67f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 68f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Returns an enumeration for the collection of permissions. 69f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 70f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @return a permission enumeration for this permission collection. 71f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @see java.security.PermissionCollection#elements() 72f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 73f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project @Override 74f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public Enumeration<Permission> elements() { 75f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return permissions.elements(); 76f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 77f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 78f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 79f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Indicates whether this permissions collection implies a specific 80f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * {@code permission}. 81f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 82f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @param permission 83f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * the permission to check. 84f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @see java.security.PermissionCollection#implies(java.security.Permission) 85f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 86f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project @Override 87f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public boolean implies(Permission permission) { 88f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (permission instanceof FilePermission) { 89f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project FilePermission fp = (FilePermission) permission; 90f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int matchedMask = 0; 91f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int i = 0; 92f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project while (i < permissions.size() 93f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project && ((matchedMask & fp.mask) != fp.mask)) { 94f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // Cast will not fail since we added it 95f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project matchedMask |= ((FilePermission) permissions.elementAt(i)) 96f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project .impliesMask(permission); 97f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project i++; 98f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 99f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return ((matchedMask & fp.mask) == fp.mask); 100f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 101f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return false; 102f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 103f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 104