graphql.nadel.validation.util.NadelSchemaUtil.kt Maven / Gradle / Ivy

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Nadel is a Java library that combines multiple GrahpQL services together into one API.

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package graphql.nadel.validation.util

import graphql.language.FieldDefinition
import graphql.nadel.Service
import graphql.nadel.dsl.FieldMappingDefinition
import graphql.nadel.dsl.UnderlyingServiceHydration
import graphql.nadel.schema.NadelDirectives
import graphql.schema.GraphQLDirectiveContainer
import graphql.schema.GraphQLFieldDefinition
import graphql.schema.GraphQLNamedType
import graphql.schema.GraphQLSchema

object NadelSchemaUtil {
    fun getUnderlyingType(overallType: GraphQLNamedType, service: Service): GraphQLNamedType? {
        return service.underlyingSchema.getType(getRenamedFrom(overallType) ?: overallType.name) as GraphQLNamedType?
    }

    fun getHydrations(field: GraphQLFieldDefinition, overallSchema: GraphQLSchema): List {
        return NadelDirectives.createUnderlyingServiceHydration(field, overallSchema)
    }

    fun hasHydration(field: GraphQLFieldDefinition): Boolean {
        return hasHydration(field.definition!!)
    }

    fun hasHydration(def: FieldDefinition): Boolean {
        val hydratedPresent = def.hasDirective(NadelDirectives.hydratedDirectiveDefinition.name)
        val hydratedFromPresent = def.hasDirective(NadelDirectives.hydratedFromDirectiveDefinition.name)
        return hydratedPresent || hydratedFromPresent
    }

    fun getRename(field: GraphQLFieldDefinition): FieldMappingDefinition? {
        return NadelDirectives.createFieldMapping(field)
    }

    fun hasRename(field: GraphQLFieldDefinition): Boolean {
        return hasRename(field.definition!!)
    }

    fun hasRename(def: FieldDefinition): Boolean {
        return def.hasDirective(NadelDirectives.renamedDirectiveDefinition.name)
    }

    fun getUnderlyingName(type: GraphQLNamedType): String {
        return getRenamedFrom(type) ?: type.name
    }

    fun getRenamedFrom(type: GraphQLNamedType): String? {
        val asDirectivesContainer = type as? GraphQLDirectiveContainer ?: return null
        return NadelDirectives.createTypeMapping(asDirectivesContainer)?.underlyingName
    }
}