1 /*
2  * Copyright (C) 2010 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 #ifndef __DRM_METADATA_H__
18 #define __DRM_METADATA_H__
19 
20 #include "drm_framework_common.h"
21 
22 namespace android {
23 
24 /**
25  * This is an utility class which contains the constraints information.
26  *
27  * As a result of DrmManagerClient::getMetadata(const String8*)
28  * an instance of DrmMetadata would be returned.
29  */
30 class DrmMetadata {
31 public:
32     /**
33      * Iterator for key
34      */
35     class KeyIterator {
36         friend class DrmMetadata;
37     private:
KeyIterator(DrmMetadata * drmMetadata)38         KeyIterator(DrmMetadata* drmMetadata) : mDrmMetadata(drmMetadata), mIndex(0) {}
39 
40     public:
41         KeyIterator(const KeyIterator& keyIterator);
42         KeyIterator& operator=(const KeyIterator& keyIterator);
~KeyIterator()43         virtual ~KeyIterator() {}
44 
45     public:
46         bool hasNext();
47         const String8& next();
48 
49     private:
50         DrmMetadata* mDrmMetadata;
51         unsigned int mIndex;
52     };
53 
54     /**
55      * Iterator for constraints
56      */
57     class Iterator {
58         friend class DrmMetadata;
59     private:
Iterator(DrmMetadata * drmMetadata)60         Iterator(DrmMetadata* drmMetadata) : mDrmMetadata(drmMetadata), mIndex(0) {}
61 
62     public:
63         Iterator(const Iterator& iterator);
64         Iterator& operator=(const Iterator& iterator);
~Iterator()65         virtual ~Iterator() {}
66 
67     public:
68         bool hasNext();
69         String8 next();
70 
71     private:
72         DrmMetadata* mDrmMetadata;
73         unsigned int mIndex;
74     };
75 
76 public:
DrmMetadata()77     DrmMetadata() {}
~DrmMetadata()78     virtual ~DrmMetadata() {
79         DrmMetadata::KeyIterator keyIt = this->keyIterator();
80 
81         while (keyIt.hasNext()) {
82             String8 key = keyIt.next();
83             const char* value = this->getAsByteArray(&key);
84             if (NULL != value) {
85                 delete[] value;
86                 value = NULL;
87             }
88         }
89         mMetadataMap.clear();
90     }
91 
92 public:
93     int getCount(void) const;
94     status_t put(const String8* key, const char* value);
95     String8 get(const String8& key) const;
96     const char* getAsByteArray(const String8* key) const;
97     KeyIterator keyIterator();
98     Iterator iterator();
99 
100 private:
101     const char* getValue(const String8* key) const;
102 
103 private:
104     typedef KeyedVector<String8, const char*> DrmMetadataMap;
105     DrmMetadataMap mMetadataMap;
106 };
107 
108 };
109 
110 #endif /* __DRM_METADATA_H__ */
111 
112