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 */ DrmRights()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 */ getConstraint(int permission)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 */ consumeRights(int permission)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 */ nativeGetConstraintInfo(int permission, DrmConstraintInfo constraint)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 */ nativeConsumeRights(int permission)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 } 137