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Diffstat (limited to 'kpilot/lib/pilotDatabase.h')
-rw-r--r-- | kpilot/lib/pilotDatabase.h | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/kpilot/lib/pilotDatabase.h b/kpilot/lib/pilotDatabase.h new file mode 100644 index 000000000..84c922ed4 --- /dev/null +++ b/kpilot/lib/pilotDatabase.h @@ -0,0 +1,272 @@ +#ifndef _KPILOT_PILOTDATABASE_H +#define _KPILOT_PILOTDATABASE_H +/* KPilot +** +** Copyright (C) 1998-2001 by Dan Pilone +** Copyright (C) 2003-2004 Reinhold Kainhofer <[email protected]> +** Copyright (C) 2005-2006 Adriaan de Groot <[email protected]> +** +*/ + +/* +** This program is free software; you can redistribute it and/or modify +** it under the terms of the GNU Lesser General Public License as published by +** the Free Software Foundation; either version 2.1 of the License, or +** (at your option) any later version. +** +** This program is distributed in the hope that it will be useful, +** but WITHOUT ANY WARRANTY; without even the implied warranty of +** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +** GNU Lesser General Public License for more details. +** +** You should have received a copy of the GNU Lesser General Public License +** along with this program in a file called COPYING; if not, write to +** the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, +** MA 02110-1301, USA. +*/ + +/* +** Bug reports and questions can be sent to [email protected] +*/ + + +#include "pilot.h" + + +/** @file +* This is the abstract base class for databases, which is used both +* by local databases and by the serial databases held in the Pilot. +*/ + + +/** + * Methods to access a database on the pilot. + * + * NOTE: It is the users responsibility + * to delete PilotRecords returned by + * PilotDatabase methods when finished with them! + */ + +class KDE_EXPORT PilotDatabase +{ +public: + PilotDatabase(const QString &name = QString::null); + virtual ~PilotDatabase(); + + + QString name() const { return fName; } ; + + /** + * Debugging information: tally how many databases are created + * or destroyed. Returns the count of currently existing databases. + */ + static int instanceCount(); + + /* -------------------- Abstract interface for subclasses ----------------- */ + + /** + * Creates the database with the given creator, type and flags + * on the given card (default is RAM). If the database already + * exists, this function does nothing. + */ + virtual bool createDatabase(long creator=0, long type=0, + int cardno=0, int flags=0, int version=0) = 0; + + /** + * Deletes the database (by name, as given in the constructor, + * the database name is stored depending on the implementation + * of PilotLocalDatabase and PilotSerialDatabas) + */ + virtual int deleteDatabase()=0; + + /** Reads the application block info, returns size. */ + virtual int readAppBlock(unsigned char* buffer, int maxLen) = 0; + + /** Writes the application block info. */ + virtual int writeAppBlock(unsigned char* buffer, int len) = 0; + + /** Returns the number of records in the database. + * If the database is not open, return -1. + */ + virtual unsigned int recordCount() const=0; + + /** Returns a QValueList of all record ids in the database. + This implementation is really bad. */ + virtual Pilot::RecordIDList idList(); + + /** Returns a list of all record ids that have been modified in the + database. This implementation is really bad. */ + virtual Pilot::RecordIDList modifiedIDList(); + + + /** Reads a record from database by id, returns record length */ + virtual PilotRecord* readRecordById(recordid_t id) = 0; + + /** Reads a record from database, returns the record length */ + virtual PilotRecord* readRecordByIndex(int index) = 0; + + /** Reads the next record from database in category 'category' */ + virtual PilotRecord* readNextRecInCategory(int category) = 0; + + /** + * Reads the next record from database that has the dirty flag set. + * If @p ind is non-NULL, *ind is set to the index of the current + * record (i.e. before the record pointer moves to the next + * modified record). + */ + virtual PilotRecord* readNextModifiedRec(int *ind=NULL) = 0; + + /** + * Writes a new record to database (if 'id' == 0, one will be + * assigned to newRecord) + */ + virtual recordid_t writeRecord(PilotRecord* newRecord) = 0; + + /** + * Deletes a record with the given recordid_t from the database, + * or all records, if @p all is set to true. The recordid_t will + * be ignored in this case. + * + * Return value is negative on error, 0 otherwise. + */ + virtual int deleteRecord(recordid_t id, bool all=false) = 0; + + /** Resets all records in the database to not dirty. */ + virtual int resetSyncFlags() = 0; + + /** Resets next record index to beginning */ + virtual int resetDBIndex() = 0; + + /** Purges all Archived/Deleted records from Palm Pilot database */ + virtual int cleanup() = 0; + + bool isOpen() const { return fDBOpen; } + + /** Returns some sensible human-readable identifier for + * the database. Serial databases get Pilot:, local + * databases return the full path. + */ + virtual QString dbPathName() const = 0; + + /** + * Use this instead of RTTI to determine the type of a + * PilotDatabase, for those cases where it's important. + */ + typedef enum { eNone=0, + eLocalDB=1, + eSerialDB=2 } DBType; + virtual DBType dbType() const = 0; + + static inline bool isResource(struct DBInfo *info) + { + return (info->flags & dlpDBFlagResource); + } + +protected: + virtual void openDatabase() = 0; + virtual void closeDatabase() = 0; + + void setDBOpen(bool yesno) { fDBOpen = yesno; } + +private: + bool fDBOpen; + QString fName; +}; + +/** A template class for reading and interpreting a database. This removes +* the need for a lot of boilerplate code that does the conversions. +* Parameters are two interpretation classes: one for the KDE side of +* things (e.g. Event) and one that interprets the Pilot's records into +* a more sensible structure (e.g. PilotDatebookEntry). The mapping from +* the KDE type to the Pilot type and vice-versa is done by the mapper +* class's convert() functions. +* +* To interpret a database as pilot-link interpretations (e.g. as +* PilotDatebookEntry records, not as Events) use the NullMapper class +* below in combination with a template instantiation with kdetype==pilottype. +* +* The database interpreter intentionally has an interface similar to +* that of a PilotDatabase, but it isn't one. +*/ +template <class kdetype, class pilottype, class mapper> +class DatabaseInterpreter +{ +private: + /** Interpret a PilotRecord as an object of type kdetype. */ + kdetype *interpret(PilotRecord *r) + { + // NULL records return NULL kde objects. + if (!r) return 0; + // Interpret the binary blob as a pilot-link object. + pilottype *a = new pilottype(r); + // The record is now obsolete. + delete r; + // Interpretation failed. + if (!a) { return 0; } + // Now convert to KDE type. + kdetype *t = mapper::convert(a); + // The NULL mapper just returns the pointer a, so we + // need to check if anything has changed before deleting. + if ( (void *)t != (void *)a ) + { + delete a; + } + return t; + } +public: + /** Constructor. Interpret the database @p d. */ + DatabaseInterpreter(PilotDatabase *d) : fDB(d) { } ; + + /** Reads a record from database by @p id */ + kdetype *readRecordById(recordid_t id) + { + return interpret(fDB->readRecordById(id)); + } + + /** Reads a record from database with index @p index */ + kdetype *readRecordByIndex(int index) + { + return interpret(fDB->readRecordByIndex(index)); + } + + /** Reads the next record from database in category @p category */ + kdetype *readNextRecInCategory(int category) + { + return interpret(fDB->readNextRecInCategory(category)); + } + + /** + * Reads the next record from database that has the dirty flag set. + * If @p ind is non-NULL, *ind is set to the index of the current + * record (i.e. before the record pointer moves to the next + * modified record). + */ + kdetype *readNextModifiedRec(int *ind=NULL) + { + return interpret(fDB->readNextModifiedRec(ind)); + } + + + /** Retrieve the database pointer; this is useful to just pass + * around DatabaseInterpreter objects as if they are databases, + * and then perform DB operations on the database it wraps. + */ + PilotDatabase *db() const { return fDB; } + +protected: + PilotDatabase *fDB; +} ; + +/** NULL mapper class; the conversions here don't @em do anything, +* so you can use this when you only need 1 conversion step (from +* PilotRecord to PilotDatebookEntry, for instance) instead of 2. +*/ +template <class T> +class NullMapper +{ +public: + /** NULL Conversion function. */ + static T *convert(T *t) { return t; } +} ; + +#endif |