org.springframework.data.mapping.model.PersistentEntityParameterValueProvider Java Examples

private ParameterValueProvider<VaultPersistentProperty> getParameterProvider(VaultPersistentEntity<?> entity,
		SecretDocument source) {

	VaultPropertyValueProvider provider = new VaultPropertyValueProvider(source);

	PersistentEntityParameterValueProvider<VaultPersistentProperty> parameterProvider = new PersistentEntityParameterValueProvider<>(
			entity, provider, source);

	return new ParameterValueProvider<VaultPersistentProperty>() {

		@Nullable
		@Override
		public <T> T getParameterValue(Parameter<T, VaultPersistentProperty> parameter) {

			Object value = parameterProvider.getParameterValue(parameter);
			return value != null ? readValue(value, parameter.getType()) : null;
		}
	};
}
 

private ParameterValueProvider<ArangoPersistentProperty> getParameterProvider(
	final ArangoPersistentEntity<?> entity,
	final VPackSlice source) {

	final PropertyValueProvider<ArangoPersistentProperty> provider = new ArangoPropertyValueProvider(entity,
			source);
	return new PersistentEntityParameterValueProvider<>(entity, provider, null);
}
 

private ParameterValueProvider<SolrPersistentProperty> getParameterValueProvider(SolrPersistentEntity<?> entity,
		Map<String, ?> source, Object parent) {

	SolrPropertyValueProvider provider = new SolrPropertyValueProvider(source, parent);
	PersistentEntityParameterValueProvider<SolrPersistentProperty> parameterProvider = new PersistentEntityParameterValueProvider<SolrPersistentProperty>(
			entity, provider, parent);

	return parameterProvider;
}
 

@Override
@SuppressWarnings("unchecked")
public <R> R read(Class<R> aClass, BaseEntity entity) {
	if (entity == null) {
		return null;
	}
	DatastorePersistentEntity<R> ostensiblePersistentEntity = (DatastorePersistentEntity<R>) this.mappingContext
			.getPersistentEntity(aClass);

	if (ostensiblePersistentEntity == null) {
		throw new DatastoreDataException("Unable to convert Datastore Entity to " + aClass);
	}

	EntityPropertyValueProvider propertyValueProvider = new EntityPropertyValueProvider(entity, this.conversions);

	DatastorePersistentEntity<?> persistentEntity = getDiscriminationPersistentEntity(ostensiblePersistentEntity,
			propertyValueProvider);

	ParameterValueProvider<DatastorePersistentProperty> parameterValueProvider =
			new PersistentEntityParameterValueProvider<>(persistentEntity, propertyValueProvider, null);

	EntityInstantiator instantiator = this.instantiators.getInstantiatorFor(persistentEntity);
	Object instance;
	try {
		instance = instantiator.createInstance(persistentEntity, parameterValueProvider);
		PersistentPropertyAccessor accessor = persistentEntity.getPropertyAccessor(instance);

		persistentEntity.doWithColumnBackedProperties((datastorePersistentProperty) -> {
			// if a property is a constructor argument, it was already computed on instantiation
			if (!persistentEntity.isConstructorArgument(datastorePersistentProperty)) {
				Object value = propertyValueProvider
						.getPropertyValue(datastorePersistentProperty);
				accessor.setProperty(datastorePersistentProperty, value);
			}
		});
	}
	catch (DatastoreDataException ex) {
		throw new DatastoreDataException("Unable to read " + persistentEntity.getName() + " entity", ex);
	}

	return (R) instance;
}
 

/**
 * Reads a single POJO from a Cloud Spanner row.
 * @param type the type of POJO
 * @param source the Cloud Spanner row
 * @param includeColumns the columns to read. If null then all columns will be read.
 * @param allowMissingColumns if true, then properties with no corresponding column are
 * not mapped. If false, then an exception is thrown.
 * @param <R> the type of the POJO.
 * @return the POJO
 */
@SuppressWarnings("unchecked")
public <R> R read(Class<R> type, Struct source, Set<String> includeColumns,
		boolean allowMissingColumns) {
	boolean readAllColumns = includeColumns == null;
	SpannerPersistentEntity<R> persistentEntity =
			(SpannerPersistentEntity<R>) this.spannerMappingContext.getPersistentEntity(type);

	StructAccessor structAccessor = new StructAccessor(source);

	StructPropertyValueProvider propertyValueProvider = new StructPropertyValueProvider(
			structAccessor,
			this.converter,
			this, allowMissingColumns);

	PreferredConstructor<?, SpannerPersistentProperty> persistenceConstructor = persistentEntity
			.getPersistenceConstructor();

	// @formatter:off
	ParameterValueProvider<SpannerPersistentProperty> parameterValueProvider =
					new PersistentEntityParameterValueProvider<>(persistentEntity, propertyValueProvider, null);
	// @formatter:on

	EntityInstantiator instantiator = this.instantiators.getInstantiatorFor(persistentEntity);
	R instance = instantiator.createInstance(persistentEntity, parameterValueProvider);
	PersistentPropertyAccessor accessor = persistentEntity.getPropertyAccessor(instance);

	persistentEntity.doWithProperties(
			(PropertyHandler<SpannerPersistentProperty>) (spannerPersistentProperty) -> {
				if (spannerPersistentProperty.isEmbedded()) {
					accessor.setProperty(spannerPersistentProperty,
							read(spannerPersistentProperty.getType(), source,
									includeColumns, allowMissingColumns));
				}
				else {
					if (!shouldSkipProperty(structAccessor, spannerPersistentProperty,
							includeColumns, readAllColumns, allowMissingColumns,
							persistenceConstructor)) {

						Object value = propertyValueProvider
								.getPropertyValue(spannerPersistentProperty);
						accessor.setProperty(spannerPersistentProperty, value);
					}
				}
			});

	return instance;
}
 

/**
   * Creates a new parameter provider.
   *
   * @param entity the persistent entity.
   * @param source the source document.
   * @param evaluator the SPEL expression evaluator.
   * @param parent the optional parent.
   * @return a new parameter value provider.
   */
private ParameterValueProvider<CratePersistentProperty> getParameterProvider(final CratePersistentEntity<?> entity, final CrateDocument source, 
																			 final DefaultSpELExpressionEvaluator evaluator, final Object parent) {
	
    CratePropertyValueProvider provider = new CratePropertyValueProvider(source, evaluator, parent);
    
    PersistentEntityParameterValueProvider<CratePersistentProperty> parameterProvider = new PersistentEntityParameterValueProvider<>(entity, provider, parent);

    return new ConverterAwareSpELExpressionParameterValueProvider(evaluator, conversionService, parameterProvider, parent);
}