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feat(federation): federation v2.6 support (#1928)
### 📝 Description Adds Federation v2.6 support ```graphql directive @Policy(policies: [[federation__Policy!]!]!) on | FIELD_DEFINITION | OBJECT | INTERFACE | SCALAR | ENUM scalar federation__Policy ``` `@policy` directive indicates to composition that the target element is restricted based on authorization policies that are evaluated in a Rhai script or coprocessor. Refer to the [Apollo Router article](https://www.apollographql.com/docs/router/configuration/authorization#policy) for additional details. ### 🔗 Related Issues N/A
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32 changes: 32 additions & 0 deletions
32
...ration/src/main/kotlin/com/expediagroup/graphql/generator/federation/directives/Policy.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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| /* | ||
| * Copyright 2024 Expedia, 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 | ||
| * | ||
| * https://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.expediagroup.graphql.generator.federation.directives | ||
|
|
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| import com.expediagroup.graphql.generator.annotations.GraphQLIgnore | ||
|
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| /** | ||
| * Annotation representing authorization policy scalar type that is used by the `@policy directive. | ||
| * | ||
| * @param value required authorization policy | ||
| * @see [com.expediagroup.graphql.generator.federation.types.POLICY_SCALAR_TYPE] | ||
| */ | ||
| @LinkedSpec(FEDERATION_SPEC) | ||
| annotation class Policy(val value: String) | ||
|
|
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| // this is a workaround for JVM lack of support nested arrays as annotation values | ||
| @GraphQLIgnore | ||
| annotation class Policies(val value: Array<Policy>) |
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...c/main/kotlin/com/expediagroup/graphql/generator/federation/directives/PolicyDirective.kt
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| /* | ||
| * Copyright 2024 Expedia, 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 | ||
| * | ||
| * https://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. | ||
| */ | ||
|
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| package com.expediagroup.graphql.generator.federation.directives | ||
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| import com.expediagroup.graphql.generator.annotations.GraphQLDirective | ||
| import com.expediagroup.graphql.generator.directives.DirectiveMetaInformation | ||
| import graphql.introspection.Introspection | ||
| import graphql.schema.GraphQLAppliedDirective | ||
| import graphql.schema.GraphQLArgument | ||
| import graphql.schema.GraphQLList | ||
| import graphql.schema.GraphQLNonNull | ||
| import graphql.schema.GraphQLScalarType | ||
| import kotlin.reflect.full.memberProperties | ||
|
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| /** | ||
| * ```graphql | ||
| * directive @policy(scopes: [[Policy!]!]!) on | ||
| * ENUM | ||
| * | FIELD_DEFINITION | ||
| * | INTERFACE | ||
| * | OBJECT | ||
| * | SCALAR | ||
| * ``` | ||
| * | ||
| * | ||
| * Directive that is used to indicate that the target element is restricted based on authorization policies that are evaluated in a Rhai script or coprocessor. | ||
| * Refer to the <a href="https://www.apollographql.com/docs/router/configuration/authorization#policy">Apollo Router article</a> for additional details. | ||
| * | ||
| * @see <a href="https://www.apollographql.com/docs/federation/federated-types/federated-directives#policy">@policy definition</a> | ||
| * @see <a href="https://www.apollographql.com/docs/router/configuration/authorization#policy">Apollo Router @policy documentation</a> | ||
| */ | ||
| @LinkedSpec(FEDERATION_SPEC) | ||
| @Repeatable | ||
| @GraphQLDirective( | ||
| name = POLICY_DIRECTIVE_NAME, | ||
| description = POLICY_DIRECTIVE_DESCRIPTION, | ||
| locations = [ | ||
| Introspection.DirectiveLocation.ENUM, | ||
| Introspection.DirectiveLocation.FIELD_DEFINITION, | ||
| Introspection.DirectiveLocation.INTERFACE, | ||
| Introspection.DirectiveLocation.OBJECT, | ||
| Introspection.DirectiveLocation.SCALAR, | ||
| ] | ||
| ) | ||
| annotation class PolicyDirective(val policies: Array<Policies>) | ||
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| internal const val POLICY_DIRECTIVE_NAME = "policy" | ||
| private const val POLICY_DIRECTIVE_DESCRIPTION = "Indicates to composition that the target element is restricted based on authorization policies that are evaluated in a Rhai script or coprocessor" | ||
| private const val POLICIES_ARGUMENT = "policies" | ||
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| internal fun policyDirectiveDefinition(policies: GraphQLScalarType): graphql.schema.GraphQLDirective = graphql.schema.GraphQLDirective.newDirective() | ||
| .name(POLICY_DIRECTIVE_NAME) | ||
| .description(POLICY_DIRECTIVE_DESCRIPTION) | ||
| .validLocations( | ||
| Introspection.DirectiveLocation.ENUM, | ||
| Introspection.DirectiveLocation.FIELD_DEFINITION, | ||
| Introspection.DirectiveLocation.INTERFACE, | ||
| Introspection.DirectiveLocation.OBJECT, | ||
| Introspection.DirectiveLocation.SCALAR | ||
| ) | ||
| .argument( | ||
| GraphQLArgument.newArgument() | ||
| .name(POLICIES_ARGUMENT) | ||
| .type( | ||
| GraphQLNonNull.nonNull( | ||
| GraphQLList.list( | ||
| GraphQLNonNull( | ||
| GraphQLList.list( | ||
| policies | ||
| ) | ||
| ) | ||
| ) | ||
| ) | ||
| ) | ||
| ) | ||
| .build() | ||
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| @Suppress("UNCHECKED_CAST") | ||
| internal fun graphql.schema.GraphQLDirective.toAppliedPolicyDirective(directiveInfo: DirectiveMetaInformation): GraphQLAppliedDirective { | ||
| // we need to manually transform @policy directive definition as JVM does not support nested array as annotation arguments | ||
| val annotationPolicies = directiveInfo.directive.annotationClass.memberProperties | ||
| .first { it.name == POLICIES_ARGUMENT } | ||
| .call(directiveInfo.directive) as? Array<Policies> ?: emptyArray() | ||
| val policies = annotationPolicies.map { policiesAnnotation -> policiesAnnotation.value.toList() } | ||
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| return this.toAppliedDirective() | ||
| .transform { appliedDirectiveBuilder -> | ||
| this.getArgument(POLICIES_ARGUMENT) | ||
| .toAppliedArgument() | ||
| .transform { argumentBuilder -> | ||
| argumentBuilder.valueProgrammatic(policies) | ||
| } | ||
| .let { | ||
| appliedDirectiveBuilder.argument(it) | ||
| } | ||
| } | ||
| } |
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74 changes: 74 additions & 0 deletions
74
...-federation/src/main/kotlin/com/expediagroup/graphql/generator/federation/types/Policy.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| /* | ||
| * Copyright 2024 Expedia, 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 | ||
| * | ||
| * https://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. | ||
| */ | ||
|
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| package com.expediagroup.graphql.generator.federation.types | ||
|
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| import com.expediagroup.graphql.generator.federation.directives.Policy | ||
| import com.expediagroup.graphql.generator.federation.exception.CoercingValueToLiteralException | ||
| import graphql.GraphQLContext | ||
| import graphql.Scalars | ||
| import graphql.execution.CoercedVariables | ||
| import graphql.language.StringValue | ||
| import graphql.language.Value | ||
| import graphql.schema.Coercing | ||
| import graphql.schema.CoercingParseLiteralException | ||
| import graphql.schema.CoercingSerializeException | ||
| import graphql.schema.GraphQLScalarType | ||
| import java.util.Locale | ||
|
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| internal const val POLICY_SCALAR_NAME = "Policy" | ||
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| /** | ||
| * Custom scalar type that is used to represent authentication policy which serializes as a String. | ||
| */ | ||
| internal val POLICY_SCALAR_TYPE: GraphQLScalarType = GraphQLScalarType.newScalar(Scalars.GraphQLString) | ||
| .name(POLICY_SCALAR_NAME) | ||
| .description("Federation type representing authorization policy") | ||
| .coercing(PolicyCoercing) | ||
| .build() | ||
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| private object PolicyCoercing : Coercing<Policy, String> { | ||
| override fun serialize(dataFetcherResult: Any, graphQLContext: GraphQLContext, locale: Locale): String = | ||
| when (dataFetcherResult) { | ||
| is Policy -> dataFetcherResult.value | ||
| else -> throw CoercingSerializeException( | ||
| "Cannot serialize $dataFetcherResult. Expected type 'Policy' but was '${dataFetcherResult.javaClass.simpleName}'." | ||
| ) | ||
| } | ||
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| override fun parseValue(input: Any, graphQLContext: GraphQLContext, locale: Locale): Policy = | ||
| when (input) { | ||
| is Policy -> input | ||
| is StringValue -> Policy::class.constructors.first().call(input.value) | ||
| else -> throw CoercingParseLiteralException( | ||
| "Cannot parse $input to Policy. Expected AST type 'StringValue' but was '${input.javaClass.simpleName}'." | ||
| ) | ||
| } | ||
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| override fun parseLiteral(input: Value<*>, variables: CoercedVariables, graphQLContext: GraphQLContext, locale: Locale): Policy = | ||
| when (input) { | ||
| is StringValue -> Policy::class.constructors.first().call(input.value) | ||
| else -> throw CoercingParseLiteralException( | ||
| "Cannot parse $input to Policy. Expected AST type 'StringValue' but was '${input.javaClass.simpleName}'." | ||
| ) | ||
| } | ||
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| override fun valueToLiteral(input: Any, graphQLContext: GraphQLContext, locale: Locale): Value<*> = | ||
| when (input) { | ||
| is Policy -> StringValue.newStringValue(input.value).build() | ||
| else -> throw CoercingValueToLiteralException(Policy::class, input) | ||
| } | ||
| } |
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