Marble

CacheStoragePolicy.h
1 // SPDX-License-Identifier: LGPL-2.1-or-later
2 //
3 // SPDX-FileCopyrightText: 2007 Tobias Koenig <[email protected]>
4 //
5 
6 #ifndef MARBLE_CACHESTORAGEPOLICY_H
7 #define MARBLE_CACHESTORAGEPOLICY_H
8 
9 #include "DiscCache.h"
10 #include "StoragePolicy.h"
11 
12 #include <QString>
13 
14 #include "marble_export.h"
15 
16 class QByteArray;
17 
18 namespace Marble
19 {
20 
21 class MARBLE_EXPORT CacheStoragePolicy : public StoragePolicy
22 {
23  Q_OBJECT
24 
25  public:
26  /**
27  * Creates a new cache storage policy.
28  *
29  * @param cacheDirectory The directory which shall be used for the cache.
30  */
31  explicit CacheStoragePolicy( const QString &cacheDirectory );
32 
33  /**
34  * Destroys the cache storage policy.
35  */
36  ~CacheStoragePolicy() override;
37 
38  /**
39  * Returns whether the @p fileName exists already.
40  */
41  bool fileExists( const QString &fileName ) const override;
42 
43  /**
44  * Updates the @p fileName with the given @p data.
45  */
46  bool updateFile( const QString &fileName, const QByteArray &data ) override;
47 
48  /**
49  * Clears the cache.
50  */
51  void clearCache() override;
52 
53  /**
54  * Returns the last error message.
55  */
56  QString lastErrorMessage() const override;
57 
58  /**
59  * Returns the data of a file.
60  */
61  QByteArray data( const QString &fileName );
62 
63  /**
64  * Sets the limit of the cache in @p bytes.
65  */
66  void setCacheLimit( quint64 bytes );
67 
68  /**
69  * Returns the limit of the cache in bytes.
70  */
71  quint64 cacheLimit() const;
72 
73  private:
74  DiscCache m_cache;
75  QString m_errorMsg;
76 };
77 
78 }
79 
80 #endif
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