de.unikassel.android.sdcframework.persistence
Class DatabaseManagerImpl

java.lang.Object
  de.unikassel.android.sdcframework.persistence.DatabaseManagerImpl

All Implemented Interfaces:

DatabaseManager

public final class DatabaseManagerImpl
extends Object
implements DatabaseManager

Implementation of a central database manager.

Field Summary

private DatabaseAdapterImpl

dbAdapter The internal database adapter

Constructor Summary

DatabaseManagerImpl(Context applicationContext, long maxDBSize, String dbName)
Constructor

DatabaseManagerImpl(Context applicationContext, String dbName)
Constructor

Method Summary

long	doDeleteOldestSamplesInDatabase(long count, boolean lowestPriorityFirst) Method to delete the oldest "count" samples in the database This method is used to delete samples for deletion in case of database size maximum reached.
<T> T	doExecuteCommand(DatabaseCommand<T> command) Does execute a database command
DatabaseAdapterImpl	getDbAdapter() Getter for the dbAdapter
long	getMaximumDatabaseSize() Getter for the maximum database size in kilobytes
long	getRecordCountInDatabase() Getter for the current sample record count stored in database
long	setMaximumDatabaseSize(long size) Setter for the maximum database size in kilobytes

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

dbAdapter

private final DatabaseAdapterImpl dbAdapter

The internal database adapter

Constructor Detail

DatabaseManagerImpl

public DatabaseManagerImpl(Context applicationContext,
                           String dbName)

Constructor

Parameters:

applicationContext - the application context

dbName - the database name

DatabaseManagerImpl

public DatabaseManagerImpl(Context applicationContext,
                           long maxDBSize,
                           String dbName)

Constructor

Parameters:

applicationContext - the application context

maxDBSize - the maximum database size

dbName - the database name

Method Detail

getDbAdapter

public final DatabaseAdapterImpl getDbAdapter()

Getter for the dbAdapter

Returns:

the dbAdapter

getRecordCountInDatabase

public long getRecordCountInDatabase()

Description copied from interface: DatabaseManager

Getter for the current sample record count stored in database

Specified by:

getRecordCountInDatabase in interface DatabaseManager

Returns:

the current sample record count in the database

setMaximumDatabaseSize

public long setMaximumDatabaseSize(long size)

Description copied from interface: DatabaseManager

Setter for the maximum database size in kilobytes

Specified by:

setMaximumDatabaseSize in interface DatabaseManager

Parameters:

size - the maximum database size

Returns:

the new maximum database size

getMaximumDatabaseSize

public long getMaximumDatabaseSize()

Description copied from interface: DatabaseManager

Getter for the maximum database size in kilobytes

Specified by:

getMaximumDatabaseSize in interface DatabaseManager

Returns:

the new maximum database size

doDeleteOldestSamplesInDatabase

public long doDeleteOldestSamplesInDatabase(long count,
                                            boolean lowestPriorityFirst)

Description copied from interface: DatabaseManager

Method to delete the oldest "count" samples in the database
This method is used to delete samples for deletion in case of database size maximum reached.
Depending on the flag lowestPriorityFirst the oldest samples will be selected priority independent or not.

Specified by:

doDeleteOldestSamplesInDatabase in interface DatabaseManager

Parameters:

count - the sample count to delete in database

lowestPriorityFirst - if true the samples will be selected ordered by priority and time stamp, otherwise just by time stamp

Returns:

the count of samples deleted in database

doExecuteCommand

public <T> T doExecuteCommand(DatabaseCommand<T> command)
                   throws SQLiteFullException

Description copied from interface: DatabaseManager

Does execute a database command

Specified by:

doExecuteCommand in interface DatabaseManager

Type Parameters:

T - the result type of the command

Parameters:

command - the command to execute

Returns:

true if successful, false if a database full exception occurred

Throws:

SQLiteFullException - if command execution fails due to database is full