Class BulkDataAccessorBase<T>

java.lang.Object

org.tquadrat.foundation.config.spi.prefs.PreferenceAccessor<T>

org.tquadrat.foundation.config.spi.prefs.BulkDataAccessorBase<T>

Type Parameters:

T - The type of the property.

Direct Known Subclasses:

ImageAccessor, SimpleBulkDataAccessor

@ClassVersion(sourceVersion="$Id: BulkDataAccessorBase.java 942 2021-12-20 02:04:04Z tquadrat $")
@API(status=STABLE,
     since="0.0.1")
public abstract class BulkDataAccessorBase<T>
extends PreferenceAccessor<T>

The abstract base class for an implementation of PreferenceAccessor for bulk data.

The method Preferences.put() limits the length for a value String to 8192. If more data should be stored, the method Preferences.putByteArray() can be used.

Author:

Thomas Thrien (thomas.thrien@tquadrat.org)

Version:

$Id: BulkDataAccessorBase.java 942 2021-12-20 02:04:04Z tquadrat $

Since:

0.0.1

UML Diagram

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UML Diagram for "org.tquadrat.foundation.config.spi.prefs.BulkDataAccessorBase"

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Constructor Summary

Constructors

Modifier	Constructor	Description
protected	BulkDataAccessorBase(String propertyName, Getter<T> getter, Setter<T> setter)	Creates a new BulkDataAccessorBase instance.

Method Summary

Modifier and Type	Method	Description
protected abstract T	fromByteArray(Preferences node, byte[] source)	Converts the given byte array to an instance of the property type.
void	readPreference(Preferences node)	Reads the preference value from the given node and writes it to the property.
protected abstract byte[]	toByteArray(Preferences node, T source)	Converts the given instance of the property type into a byte array.
void	writePreference(Preferences node)	Writes the preference value from the property and writes it to the given node.

Methods inherited from class PreferenceAccessor

getPropertyName, getter, hasKey, setter

Methods inherited from class Object

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

Constructor Details

BulkDataAccessorBase

protected BulkDataAccessorBase(String propertyName,
 Getter<T> getter,
 Setter<T> setter)

Creates a new BulkDataAccessorBase instance.

Parameters:

propertyName - The name of the property.

getter - The property getter.

setter - The property setter.

Method Details

fromByteArray

protected abstract T fromByteArray(Preferences node,
 byte[] source)
                            throws InvalidPreferenceValueException

Converts the given byte array to an instance of the property type.

Parameters:

node - The reference to the Preferences node that provides the value.

source - The byte array; can be null.

Returns:

The instance, or null if the source was already null.

Throws:

InvalidPreferenceValueException - The preferences value cannot be translated to the property type.

readPreference

public void readPreference(Preferences node)
                    throws BackingStoreException,
InvalidPreferenceValueException

Reads the preference value from the given node and writes it to the property.

Specified by:

readPreference in class PreferenceAccessor<T>

Parameters:

node - The preference node.

Throws:

BackingStoreException - There are problems on reading the given node.

InvalidPreferenceValueException - The preferences value cannot be translated to the property type.

toByteArray

protected abstract byte[] toByteArray(Preferences node,
 T source)
                               throws InvalidPreferenceValueException

Converts the given instance of the property type into a byte array.

Parameters:

node - The reference to the Preferences node that is used to store the preferences value.

source - The instance; can be null.

Returns:

The byte array, or null if the source was already null.

Throws:

InvalidPreferenceValueException - The conversion failed to a byte array failed.

writePreference

public void writePreference(Preferences node)
                     throws BackingStoreException

Writes the preference value from the property and writes it to the given node.

Specified by:

writePreference in class PreferenceAccessor<T>

Parameters:

node - The preference node.

Throws:

BackingStoreException - There are problems on writing the given node.