fr.inria.atlanmod.neoemf.data

Class AbstractBackend

java.lang.Object

fr.inria.atlanmod.neoemf.data.mapping.AbstractDataMapper

fr.inria.atlanmod.neoemf.data.AbstractBackend

All Implemented Interfaces:

Backend, ClassMapper, ContainerMapper, DataMapper, ManyReferenceMapper, ManyValueMapper, ReferenceMapper, ValueMapper, Saveable, Closeable, AutoCloseable, Copiable<DataMapper>

Direct Known Subclasses:

AbstractInMemoryBackend

@ParametersAreNonnullByDefault
public abstract class AbstractBackend
extends AbstractDataMapper
implements Backend

An abstract Backend that provides a global behavior about the closure.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractBackend() Constructs a new AbstractBackend.
protected	AbstractBackend(String name) Constructs a new AbstractBackend with the given name.

Method Summary

Modifier and Type	Method and Description
Stream<Id>	allInstancesOf(ClassBean metaClass, boolean strict) Retrieves all instances of the given metaClass.
void	close() Cleanly closes this manager, clear all data in-memory and releases any system resources associated with it.
void	copyTo(DataMapper target)
protected abstract void	internalClose() Cleanly closes the database, and releases any system resources associated with it.
protected void	internalCopyTo(DataMapper target) Copies the content of this back-end to the target, using a specific implementation when the target is an instance of this back-end.
protected abstract void	internalSave() Saves all modifications made on this back-end since the last call.
void	save() Saves all changes made on this manager since the last call.
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface fr.inria.atlanmod.neoemf.data.Backend

isDistributed, isPersistent

Methods inherited from interface fr.inria.atlanmod.neoemf.data.mapping.ContainerMapper

containerFor, containerOf, removeContainer

Methods inherited from interface fr.inria.atlanmod.neoemf.data.mapping.ClassMapper

allInstancesOf, metaClassFor, metaClassOf

Methods inherited from interface fr.inria.atlanmod.neoemf.data.mapping.ManyValueMapper

addAllValues, addValue, allValuesOf, appendAllValues, appendValue, removeAllValues, removeValue, sizeOfValue, valueFor, valueOf

Methods inherited from interface fr.inria.atlanmod.neoemf.data.mapping.ValueMapper

removeValue, valueFor, valueOf

Methods inherited from interface fr.inria.atlanmod.neoemf.data.mapping.ManyReferenceMapper

addAllReferences, addReference, allReferencesOf, appendAllReferences, appendReference, referenceFor, referenceOf, removeAllReferences, removeReference, sizeOfReference

Methods inherited from interface fr.inria.atlanmod.neoemf.data.mapping.ReferenceMapper

referenceFor, referenceOf, removeReference

Constructor Detail

AbstractBackend

protected AbstractBackend()

Constructs a new AbstractBackend.

AbstractBackend

protected AbstractBackend(@Nullable
                          String name)

Constructs a new AbstractBackend with the given name.

Parameters:

name - the unique name of this backend

Method Detail

close

public final void close()

Description copied from interface: Saveable

Cleanly closes this manager, clear all data in-memory and releases any system resources associated with it. All modifications are saved before closing.

If the manager is already closed, then invoking this method has no effect.

Specified by:

close in interface Saveable

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

save

public final void save()

Description copied from interface: Saveable

Saves all changes made on this manager since the last call.

Specified by:

save in interface Saveable

internalClose

protected abstract void internalClose()
                               throws IOException

Cleanly closes the database, and releases any system resources associated with it.

Throws:

IOException - if an I/O error occurs when closing

internalSave

protected abstract void internalSave()
                              throws IOException

Saves all modifications made on this back-end since the last call.

Throws:

IOException - if an I/O error occurs when saving

allInstancesOf

@Nonnull
public final Stream<Id> allInstancesOf(ClassBean metaClass,
                                                 boolean strict)

Description copied from interface: ClassMapper

Retrieves all instances of the given metaClass.

Specified by:

allInstancesOf in interface ClassMapper

Parameters:

metaClass - the meta-class to compute the instances of

strict - true if the lookup searches for strict instances

Returns:

an Stream containing the instances of the metaClass

copyTo

public void copyTo(DataMapper target)

Specified by:

copyTo in interface Copiable<DataMapper>

internalCopyTo

protected void internalCopyTo(DataMapper target)

Copies the content of this back-end to the target, using a specific implementation when the target is an instance of this back-end.

Parameters:

target - the back-end where to store the copied content

Throws:

UnsupportedOperationException - if this back-end does not support the specific copy

toString

public String toString()

Overrides:

toString in class Object