org.apache.felix.prefs.impl
Class DataFileBackingStoreImpl

java.lang.Object
  org.apache.felix.prefs.impl.StreamBackingStoreImpl
      org.apache.felix.prefs.impl.DataFileBackingStoreImpl

All Implemented Interfaces:

BackingStore

public class DataFileBackingStoreImpl
extends StreamBackingStoreImpl

This implementating of the backing store uses the bundle mechanism to store binary data.

Field Summary

protected File

rootDirectory The root directory (or null if not available)

Fields inherited from class org.apache.felix.prefs.impl.StreamBackingStoreImpl

bundleContext

Constructor Summary

DataFileBackingStoreImpl(BundleContext context)

Method Summary

Long[]	availableBundles() Return all bundle ids for which preferences are stored..
protected void	checkAccess() This method is invoked to check if the backing store is accessible right now.
protected PreferencesDescription	getDescription(File file)
protected File	getFile(PreferencesDescription desc) Get the file fo the preferences tree.
protected OutputStream	getOutputStream(PreferencesDescription desc) Get the output stream to write the preferences.
PreferencesImpl	load(BackingStoreManager manager, PreferencesDescription desc) Load the preferences for the given description.
PreferencesImpl[]	loadAll(BackingStoreManager manager, Long bundleId) Load all preferences for this bundle.
void	remove(Long bundleId) Remove all preferences stored for this bundle.

Methods inherited from class org.apache.felix.prefs.impl.StreamBackingStoreImpl

hasChanges, read, readPreferences, store, update, write, writePreferences

Methods inherited from class java.lang.Object

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

Field Detail

rootDirectory

protected final File rootDirectory

The root directory (or null if not available)

Constructor Detail

DataFileBackingStoreImpl

public DataFileBackingStoreImpl(BundleContext context)

Method Detail

checkAccess

protected void checkAccess()
                    throws BackingStoreException

Description copied from class: StreamBackingStoreImpl

This method is invoked to check if the backing store is accessible right now.

Specified by:

checkAccess in class StreamBackingStoreImpl

Throws:

BackingStoreException

See Also:

org.apache.felix.sandbox.preferences.impl.StreamBackingStoreImpl#checkAccess()

getOutputStream

protected OutputStream getOutputStream(PreferencesDescription desc)
                                throws IOException

Description copied from class: StreamBackingStoreImpl

Get the output stream to write the preferences.

Specified by:

getOutputStream in class StreamBackingStoreImpl

Throws:

IOException

See Also:

org.apache.felix.sandbox.preferences.impl.StreamBackingStoreImpl#getOutputStream(org.apache.felix.sandbox.preferences.PreferencesDescription)

availableBundles

public Long[] availableBundles()

Description copied from interface: BackingStore

Return all bundle ids for which preferences are stored..

Returns:

Return an array of bundle ids or an empty array.

See Also:

BackingStore.availableBundles()

getDescription

protected PreferencesDescription getDescription(File file)

remove

public void remove(Long bundleId)
            throws BackingStoreException

Description copied from interface: BackingStore

Remove all preferences stored for this bundle.

Parameters:

bundleId - The bundle id.

Throws:

BackingStoreException

See Also:

BackingStore.remove(java.lang.Long)

loadAll

public PreferencesImpl[] loadAll(BackingStoreManager manager,
                                 Long bundleId)
                          throws BackingStoreException

Description copied from interface: BackingStore

Load all preferences for this bundle.

Parameters:

manager - The backing store manager which should be passed to new preferences implementations.

bundleId - The bundle id.

Returns:

An array with the preferences or an empty array.

Throws:

BackingStoreException

See Also:

BackingStore.loadAll(org.apache.felix.prefs.BackingStoreManager, java.lang.Long)

load

public PreferencesImpl load(BackingStoreManager manager,
                            PreferencesDescription desc)
                     throws BackingStoreException

Description copied from interface: BackingStore

Load the preferences for the given description.

Parameters:

manager - The backing store manager which should be passed to new preferences implementations.

Returns:

A new preferences object or null if it's not available in the backing store.

Throws:

BackingStoreException

See Also:

BackingStore.load(org.apache.felix.prefs.BackingStoreManager, org.apache.felix.prefs.PreferencesDescription)

getFile

protected File getFile(PreferencesDescription desc)

Get the file fo the preferences tree.

Parameters:

desc -

Returns: