Package org.springframework.data.neo4j.core.mapping

Class MappingSupport

java.lang.Object

org.springframework.data.neo4j.core.mapping.MappingSupport

@API(status=INTERNAL,
     since="6.0")
public final class MappingSupport
extends Object

Since:

6.0

Author:

Michael J. Simons, Philipp Tölle, Gerrit Meier

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	MappingSupport.RelationshipPropertiesWithEntityHolder	Class that defines a tuple of relationship with properties and the connected target entity.

Method Summary

Modifier and Type	Method	Description
static Object	getRelationshipOrRelationshipPropertiesObject(Neo4jMappingContext neo4jMappingContext, boolean hasRelationshipProperties, boolean isDynamicAssociation, Object valueToStore, PersistentPropertyAccessor<?> propertyAccessor)	Extract the relationship properties or just the related object if there are no relationship properties attached.
static Predicate<org.neo4j.driver.Value>	isListContainingOnly(org.neo4j.driver.types.Type collectionType, org.neo4j.driver.types.Type requiredType)	A helper that produces a predicate to check whether a Value is a list value and contains only other values with a given type.
static Collection<?>	unifyRelationshipValue(Neo4jPersistentProperty property, Object rawValue)	The value for a relationship can be a scalar object (1:1), a collection (1:n), a map (1:n, but with dynamic relationship types) or a map (1:n) with properties for each relationship.

Methods inherited from class java.lang.Object

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

Method Details

unifyRelationshipValue

public static Collection<?> unifyRelationshipValue(Neo4jPersistentProperty property,
 @Nullable
 Object rawValue)

The value for a relationship can be a scalar object (1:1), a collection (1:n), a map (1:n, but with dynamic relationship types) or a map (1:n) with properties for each relationship. This method unifies the type into something iterable, depending on the given inverse type.

Parameters:

rawValue - The raw value to unify

Returns:

A unified collection (Either a collection of Map.Entry for dynamic and relationships with properties or a list of related values)

isListContainingOnly

public static Predicate<org.neo4j.driver.Value> isListContainingOnly(org.neo4j.driver.types.Type collectionType,
 org.neo4j.driver.types.Type requiredType)

A helper that produces a predicate to check whether a Value is a list value and contains only other values with a given type.

Parameters:

collectionType - The required collection type system

requiredType - The required type

Returns:

A predicate

getRelationshipOrRelationshipPropertiesObject

public static Object getRelationshipOrRelationshipPropertiesObject(Neo4jMappingContext neo4jMappingContext,
 boolean hasRelationshipProperties,
 boolean isDynamicAssociation,
 Object valueToStore,
 PersistentPropertyAccessor<?> propertyAccessor)

Extract the relationship properties or just the related object if there are no relationship properties attached.

Parameters:

neo4jMappingContext - - current mapping context

hasRelationshipProperties - - does this relationship has properties

isDynamicAssociation - - is the defined relationship a dynamic association

valueToStore - - either a plain object or MappingSupport.RelationshipPropertiesWithEntityHolder

propertyAccessor - - PropertyAccessor for the value

Returns:

extracted related object or relationship properties