class NodeSetPropertyDelegate<T : Node>(parent: Node, property: KProperty1<*, *>) : BaseNodePropertyDelegate<T, NodeSetPropertyDelegate.NodeSetProperty>

Property for the many side of a relation Is mapped to a Connection in GraphQL

Parameters

parent
property

Constructors

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constructor(parent: Node, property: KProperty1<*, *>)

Types

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inner class NodeSetProperty : AbstractSet<T> , MutableSet<T>

Node property representing the many side of a node relation. Provides set functionality. The iterator supports remove.

Properties

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private val addedNodes: HashSet<T>

Newly added nodes, relations must be added to the database

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private var currentNodes: MutableSet<T>?

Current set of nodes

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private val isLoaded: Boolean

true iff the current values are loaded from the database or set via constructor

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private val lazyLoadingDelegate: <anonymous>

Delegate for lazy-loading the property

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protected var nodeCache: NodeCache?

NodeCache used to load this property might be set after initial loading, but must not be changed

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protected val parent: Node
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protected val property: KProperty1<*, *>
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protected val propertyName: String

Dynamic type of parent and name of property, can be used for error messages without leaking information

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private val removedNodes: HashSet<T>

Newly removed nodes, relations must be removed from the database

Functions

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private suspend fun ensureLoaded(cache: NodeCache?, loader: LazyLoadingSubqueryGenerator<T>.() -> Unit?)

Ensures that this NodeSetProperty is loaded

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internal open suspend override fun getLoadedProperty(cache: NodeCache?, loader: LazyLoadingSubqueryGenerator<T>.() -> Unit?): NodeSetPropertyDelegate.NodeSetProperty

Gets the loaded property which is returned by the lazy loading delegate

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internal open override fun getLoadedRelatedNodes(): Collection<Node>

Gets related nodes defined by this property, but only those already loaded (therefore no lazy loading) The relationships do not have to be persisted yet

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internal open override fun getRelatedNodesToSave(): Collection<Node>

Gets Nodes which should be persisted when this Node is persisted

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internal open override fun getRelationshipDiff(): RelationshipDiff

Gets the diff of added and removed relationships to persist in the database

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operator fun getValue(thisRef: Node, property: KProperty<*>): LazyLoadingDelegate<T, NodeSetPropertyDelegate.NodeSetProperty>

Gets the lazy loading delegate which is used to get the value of the property

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open override fun registerQueryResult(fieldDefinition: FieldDefinition, queryResult: NodeQueryResult<T>)

Called to register a database query result Adds the result to the cache Can be overridden to add custom behavior (super should be called in this case)

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open override fun validate(savingNodes: Set<Node>, relationshipDefinition: RelationshipDefinition, nodeDefinitionCollection: NodeDefinitionCollection)

Called to validate the property Should throw an exception if the property is invalid, with an appropriate reason