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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __DRM_CONSTRAINTS_H__
#define __DRM_CONSTRAINTS_H__
#include "drm_framework_common.h"
namespace android {
/**
* This is an utility class which contains the constraints information.
*
* As a result of DrmManagerClient::getConstraints(const String8*, const int)
* an instance of DrmConstraints would be returned.
*
*/
class DrmConstraints {
public:
/**
* The following variables are replica of android.drm.DrmStore.ConstraintsColumns
* Any changes should also be incorporated with Java Layer as well
*/
/**
* The max repeat count
*/
static const String8 MAX_REPEAT_COUNT;
/**
* The remaining repeat count
*/
static const String8 REMAINING_REPEAT_COUNT;
/**
* The time before which the protected file can not be played/viewed
*/
static const String8 LICENSE_START_TIME;
/**
* The time after which the protected file can not be played/viewed
*/
static const String8 LICENSE_EXPIRY_TIME;
/**
* The available time for license
*/
static const String8 LICENSE_AVAILABLE_TIME;
/**
* The data stream for extended metadata
*/
static const String8 EXTENDED_METADATA;
public:
/**
* Iterator for key
*/
class KeyIterator {
friend class DrmConstraints;
private:
KeyIterator(DrmConstraints* drmConstraints)
: mDrmConstraints(drmConstraints), mIndex(0) {}
public:
KeyIterator(const KeyIterator& keyIterator);
KeyIterator& operator=(const KeyIterator& keyIterator);
virtual ~KeyIterator() {}
public:
bool hasNext();
const String8& next();
private:
DrmConstraints* mDrmConstraints;
unsigned int mIndex;
};
/**
* Iterator for constraints
*/
class Iterator {
friend class DrmConstraints;
private:
Iterator(DrmConstraints* drmConstraints)
: mDrmConstraints(drmConstraints), mIndex(0) {}
public:
Iterator(const Iterator& iterator);
Iterator& operator=(const Iterator& iterator);
virtual ~Iterator() {}
public:
bool hasNext();
String8 next();
private:
DrmConstraints* mDrmConstraints;
unsigned int mIndex;
};
public:
DrmConstraints() {}
virtual ~DrmConstraints() {
DrmConstraints::KeyIterator keyIt = this->keyIterator();
while (keyIt.hasNext()) {
String8 key = keyIt.next();
const char* value = this->getAsByteArray(&key);
if (NULL != value) {
delete[] value;
value = NULL;
}
}
mConstraintMap.clear();
}
public:
/**
* Returns the number of constraints contained in this instance
*
* @return Number of constraints
*/
int getCount(void) const;
/**
* Adds constraint information as <key, value> pair to this instance
*
* @param[in] key Key to add
* @param[in] value Value to add
* @return Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure
*/
status_t put(const String8* key, const char* value);
/**
* Retrieves the value of given key
*
* @param key Key whose value to be retrieved
* @return The value
*/
String8 get(const String8& key) const;
/**
* Retrieves the value as byte array of given key
* @param key Key whose value to be retrieved as byte array
* @return The byte array value
*/
const char* getAsByteArray(const String8* key) const;
/**
* Returns KeyIterator object to walk through the keys associated with this instance
*
* @return KeyIterator object
*/
KeyIterator keyIterator();
/**
* Returns Iterator object to walk through the values associated with this instance
*
* @return Iterator object
*/
Iterator iterator();
private:
const char* getValue(const String8* key) const;
private:
typedef KeyedVector<String8, const char*> DrmConstraintsMap;
DrmConstraintsMap mConstraintMap;
};
};
#endif /* __DRM_CONSTRAINTS_H__ */
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