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
22namespace 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 */
30class DrmMetadata {
31public:
32    /**
33     * Iterator for key
34     */
35    class KeyIterator {
36        friend class DrmMetadata;
37    private:
38        KeyIterator(DrmMetadata* drmMetadata) : mDrmMetadata(drmMetadata), mIndex(0) {}
39
40    public:
41        KeyIterator(const KeyIterator& keyIterator);
42        KeyIterator& operator=(const 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:
60        Iterator(DrmMetadata* drmMetadata) : mDrmMetadata(drmMetadata), mIndex(0) {}
61
62    public:
63        Iterator(const Iterator& iterator);
64        Iterator& operator=(const 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
76public:
77    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
92public:
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
100private:
101    const char* getValue(const String8* key) const;
102
103private:
104    typedef KeyedVector<String8, const char*> DrmMetadataMap;
105    DrmMetadataMap mMetadataMap;
106};
107
108};
109
110#endif /* __DRM_METADATA_H__ */
111
112