commonMain.maryk.core.query.DefinedByReference.kt Maven / Gradle / Ivy

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Maryk is a Kotlin Multiplatform library which helps you to store, query and send data in a structured way over multiple platforms. The data store stores any value with a version, so it is possible to request only the changed data or live listen for updates.

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package maryk.core.query

import maryk.core.exceptions.ContextNotFoundException
import maryk.core.models.BaseDataModel
import maryk.core.models.IsObjectDataModel
import maryk.core.properties.definitions.IsPropertyDefinition
import maryk.core.properties.definitions.IsSerializablePropertyDefinition
import maryk.core.properties.definitions.contextual.ContextualPropertyReferenceDefinition
import maryk.core.properties.definitions.wrapper.contextual
import maryk.core.properties.references.AnyPropertyReference
import maryk.core.properties.references.IsPropertyReference

/**
 * For objects containing a reference which defines the context of other properties
 */
interface DefinedByReference {
    val reference: IsPropertyReference, *>
}

internal fun  IsObjectDataModel.addReference(
    getter: (DO) -> AnyPropertyReference?
) =
    this.contextual(
        index = 1u,
        definition = ContextualPropertyReferenceDefinition(
            contextualResolver = {
                it?.dataModel as? BaseDataModel<*>?
                    ?: throw ContextNotFoundException()
            }
        ),
        getter = getter,
        capturer = { context, value ->
            @Suppress("UNCHECKED_CAST")
            context.reference = value as IsPropertyReference<*, IsSerializablePropertyDefinition<*, *>, *>
        }
    )