fr.inria.atlanmod.neoemf.data.mapping

Interface ValueMapper

All Known Subinterfaces:

AllReferenceAs<M>, Backend, BerkeleyDbBackend, BlueprintsBackend, DataMapper, HBaseBackend, InMemoryBackend, ManyReferenceAs<M>, ManyReferenceMergedAs<M>, ManyValueMapper, ManyValueWithArrays, ManyValueWithIndices, ManyValueWithLists, MapDbBackend, MongoDbBackend, ReferenceAs<M>, Store

All Known Implementing Classes:

AbstractBackend, AbstractCachingStore, AbstractDataMapper, AbstractDataMapperChain, AbstractInMemoryBackend, AbstractStore, AutoSavingStore, BoundInMemoryBackend, ClassCachingStore, ClosedStore, ContainerCachingStore, DefaultInMemoryBackend, FeatureCachingStore, InvalidBackend, InvalidDataMapper, ListeningStore, NoopStore, ReadOnlyStore, SizeCachingStore

@ParametersAreNonnullByDefault
public interface ValueMapper

An object capable of mapping single-valued attributes represented as a set of key/value pair.

Method Summary

Modifier and Type	Method and Description
void	removeValue(SingleFeatureBean feature) Removes the value of the specified feature.
<V> Optional<V>	valueFor(SingleFeatureBean feature, V value) Defines the value of the specified feature.
<V> Optional<V>	valueOf(SingleFeatureBean feature) Retrieves the value of the specified feature.

Method Detail

valueOf

@Nonnull
<V> Optional<V> valueOf(SingleFeatureBean feature)

Retrieves the value of the specified feature.

Type Parameters:

V - the type of value

Parameters:

feature - the bean identifying the value

Returns:

an Optional containing the value, or Optional.empty() if the feature hasn't any value or doesn't exist

Throws:

NullPointerException - if any parameter is null

valueFor

@Nonnull
<V> Optional<V> valueFor(SingleFeatureBean feature,
                                   V value)

Defines the value of the specified feature.

Type Parameters:

V - the type of value

Parameters:

feature - the bean identifying the value

value - the value to set

Returns:

an Optional containing the previous value of the feature, or Optional.empty() if the feature has no value before

Throws:

NullPointerException - if any parameter is null

removeValue

void removeValue(SingleFeatureBean feature)

Removes the value of the specified feature.

Parameters:

feature - the bean identifying the value

Throws:

NullPointerException - if any parameter is null