The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package android.drm.mobile1; |
| 18 | |
| 19 | /** |
| 20 | * This class provides interfaces to access the DRM rights. |
| 21 | */ |
| 22 | public class DrmRights { |
| 23 | /** |
| 24 | * The DRM permission of play. |
| 25 | */ |
| 26 | public static final int DRM_PERMISSION_PLAY = 1; |
| 27 | |
| 28 | /** |
| 29 | * The DRM permission of display. |
| 30 | */ |
| 31 | public static final int DRM_PERMISSION_DISPLAY = 2; |
| 32 | |
| 33 | /** |
| 34 | * The DRM permission of execute. |
| 35 | */ |
| 36 | public static final int DRM_PERMISSION_EXECUTE = 3; |
| 37 | |
| 38 | /** |
| 39 | * The DRM permission of print. |
| 40 | */ |
| 41 | public static final int DRM_PERMISSION_PRINT = 4; |
| 42 | |
| 43 | /** |
| 44 | * Successful operation. |
| 45 | */ |
| 46 | private static final int JNI_DRM_SUCCESS = 0; |
| 47 | |
| 48 | /** |
| 49 | * General failure. |
| 50 | */ |
| 51 | private static final int JNI_DRM_FAILURE = -1; |
| 52 | |
| 53 | /** |
| 54 | * The uid of this rights object. |
| 55 | */ |
| 56 | private String roId = ""; |
| 57 | |
| 58 | |
| 59 | /** |
| 60 | * Construct the DrmRights. |
| 61 | */ |
| 62 | public DrmRights() { |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * Get the constraint of the given permission on this rights object. |
| 67 | * |
| 68 | * @param permission the given permission. |
| 69 | * |
| 70 | * @return a DrmConstraint instance. |
| 71 | */ |
| 72 | public DrmConstraintInfo getConstraint(int permission) { |
| 73 | DrmConstraintInfo c = new DrmConstraintInfo(); |
| 74 | |
| 75 | /* call native method to get latest constraint information */ |
| 76 | int res = nativeGetConstraintInfo(permission, c); |
| 77 | |
| 78 | if (JNI_DRM_FAILURE == res) |
| 79 | return null; |
| 80 | |
| 81 | return c; |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * Consume the rights of the given permission. |
| 86 | * |
| 87 | * @param permission the given permission. |
| 88 | * |
| 89 | * @return true if consume success. |
| 90 | * false if consume failure. |
| 91 | */ |
| 92 | public boolean consumeRights(int permission) { |
| 93 | /* call native method to consume and update rights */ |
| 94 | int res = nativeConsumeRights(permission); |
| 95 | |
| 96 | if (JNI_DRM_FAILURE == res) |
| 97 | return false; |
| 98 | |
| 99 | return true; |
| 100 | } |
| 101 | |
| 102 | |
| 103 | /** |
| 104 | * native method: get the constraint information of the given permission. |
| 105 | * |
| 106 | * @param permission the given permission. |
| 107 | * @param constraint the instance of constraint. |
| 108 | * |
| 109 | * @return #JNI_DRM_SUCCESS if succeed. |
| 110 | * #JNI_DRM_FAILURE if fail. |
| 111 | */ |
| 112 | private native int nativeGetConstraintInfo(int permission, DrmConstraintInfo constraint); |
| 113 | |
| 114 | /** |
| 115 | * native method: consume the rights of the given permission. |
| 116 | * |
| 117 | * @param permission the given permission. |
| 118 | * |
| 119 | * @return #JNI_DRM_SUCCESS if succeed. |
| 120 | * #JNI_DRM_FAILURE if fail. |
| 121 | */ |
| 122 | private native int nativeConsumeRights(int permission); |
| 123 | |
| 124 | |
| 125 | /** |
| 126 | * Load the shared library to link the native methods. |
| 127 | */ |
| 128 | static { |
| 129 | try { |
| 130 | System.loadLibrary("drm1_jni"); |
| 131 | } |
| 132 | catch (UnsatisfiedLinkError ule) { |
| 133 | System.err.println("WARNING: Could not load libdrm1_jni.so"); |
| 134 | } |
| 135 | } |
| 136 | } |