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DgsDataFetchingEnvironment.kt
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DgsDataFetchingEnvironment.kt
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/*
* Copyright 2022 Netflix, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.netflix.graphql.dgs
import com.netflix.graphql.dgs.context.DgsContext
import com.netflix.graphql.dgs.exceptions.MultipleDataLoadersDefinedException
import com.netflix.graphql.dgs.exceptions.NoDataLoaderFoundException
import com.netflix.graphql.dgs.internal.utils.DataLoaderNameUtil
import graphql.GraphQLContext
import graphql.cachecontrol.CacheControl
import graphql.execution.ExecutionId
import graphql.execution.ExecutionStepInfo
import graphql.execution.MergedField
import graphql.execution.directives.QueryDirectives
import graphql.language.Document
import graphql.language.Field
import graphql.language.FragmentDefinition
import graphql.language.OperationDefinition
import graphql.schema.DataFetchingEnvironment
import graphql.schema.DataFetchingFieldSelectionSet
import graphql.schema.GraphQLFieldDefinition
import graphql.schema.GraphQLOutputType
import graphql.schema.GraphQLSchema
import graphql.schema.GraphQLType
import org.dataloader.DataLoader
import org.dataloader.DataLoaderRegistry
import java.util.*
class DgsDataFetchingEnvironment(private val dfe: DataFetchingEnvironment) : DataFetchingEnvironment {
fun getDgsContext(): DgsContext {
val context = dfe.getContext<Any>()
if (context is DgsContext) {
return context
} else {
throw RuntimeException("""Context object of type '${context::class.java.name}' is not a DgsContext. This method does not work if you have a custom implementation of DgsContextBuilder""")
}
}
fun <K, V> getDataLoader(loaderClass: Class<*>): DataLoader<K, V> {
val annotation = loaderClass.getAnnotation(DgsDataLoader::class.java)
return if (annotation != null) {
dfe.getDataLoader(DataLoaderNameUtil.getDataLoaderName(loaderClass, annotation))
} else {
val loaders = loaderClass.fields.filter { it.isAnnotationPresent(DgsDataLoader::class.java) }
if (loaders.size > 1) throw MultipleDataLoadersDefinedException(loaderClass)
val loaderField: java.lang.reflect.Field = loaders
.firstOrNull() ?: throw NoDataLoaderFoundException(loaderClass)
val theAnnotation = loaderField.getAnnotation(DgsDataLoader::class.java)
val loaderName = theAnnotation.name
dfe.getDataLoader(loaderName)
}
}
override fun <T : Any?> getSource(): T {
return dfe.getSource()
}
override fun getArguments(): MutableMap<String, Any> {
return dfe.arguments
}
override fun containsArgument(name: String?): Boolean {
return dfe.containsArgument(name)
}
override fun <T : Any?> getArgument(name: String?): T {
return dfe.getArgument(name)
}
override fun <T : Any?> getArgumentOrDefault(name: String?, defaultValue: T): T {
return dfe.getArgumentOrDefault(name, defaultValue)
}
@Deprecated(message = "Use getGraphQLContext() instead.", replaceWith = ReplaceWith(expression = "getGraphQLContext().get()"))
override fun <T : Any?> getContext(): T {
return dfe.getContext()
}
override fun getGraphQlContext(): GraphQLContext {
return dfe.graphQlContext
}
override fun <T : Any?> getLocalContext(): T {
return dfe.getLocalContext()
}
override fun <T : Any?> getRoot(): T {
return dfe.getRoot()
}
override fun getFieldDefinition(): GraphQLFieldDefinition {
return dfe.fieldDefinition
}
@Deprecated("Use getMergedField()")
override fun getFields(): MutableList<Field> {
@Suppress("DEPRECATION")
return dfe.fields
}
override fun getMergedField(): MergedField {
return dfe.mergedField
}
override fun getField(): Field {
return dfe.field
}
override fun getFieldType(): GraphQLOutputType {
return dfe.fieldType
}
override fun getExecutionStepInfo(): ExecutionStepInfo {
return dfe.executionStepInfo
}
override fun getParentType(): GraphQLType {
return dfe.parentType
}
override fun getGraphQLSchema(): GraphQLSchema {
return dfe.graphQLSchema
}
override fun getFragmentsByName(): MutableMap<String, FragmentDefinition> {
return dfe.fragmentsByName
}
override fun getExecutionId(): ExecutionId {
return dfe.executionId
}
override fun getSelectionSet(): DataFetchingFieldSelectionSet {
return dfe.selectionSet
}
override fun getQueryDirectives(): QueryDirectives {
return dfe.queryDirectives
}
override fun <K : Any?, V : Any?> getDataLoader(dataLoaderName: String?): DataLoader<K, V> {
return dfe.getDataLoader(dataLoaderName)
}
override fun getDataLoaderRegistry(): DataLoaderRegistry {
return dfe.dataLoaderRegistry
}
override fun getCacheControl(): CacheControl {
return dfe.cacheControl
}
override fun getLocale(): Locale {
return dfe.locale
}
override fun getOperationDefinition(): OperationDefinition {
return dfe.operationDefinition
}
override fun getDocument(): Document {
return dfe.document
}
override fun getVariables(): MutableMap<String, Any> {
return dfe.variables
}
}