Merge pull request #364 from graphql-java-kickstart/bugfix/282

Move DirectiveBehavior out of graphql.schema.idl package

Author: oliemansm

src/main/kotlin/graphql/kickstart/tools/DirectiveBehavior.kt

@@ -0,0 +1,55 @@
+package graphql.kickstart.tools
+
+import graphql.schema.*
+import graphql.schema.idl.RuntimeWiring
+import graphql.schema.idl.SchemaGeneratorDirectiveHelper
+import graphql.schema.idl.TypeDefinitionRegistry
+import kotlin.reflect.full.createInstance
+
+private val PARAMETERS = Class.forName("graphql.schema.idl.SchemaGeneratorDirectiveHelper\$Parameters")
+private val DIRECTIVE_HELPER = SchemaGeneratorDirectiveHelper::class.java
+
+private val ON_OBJECT_METHOD = DIRECTIVE_HELPER.getMethod("onObject", GraphQLObjectType::class.java, PARAMETERS)
+private val ON_INTERFACE_METHOD = DIRECTIVE_HELPER.getMethod("onInterface", GraphQLInterfaceType::class.java, PARAMETERS)
+private val ON_UNION_METHOD = DIRECTIVE_HELPER.getMethod("onUnion", GraphQLUnionType::class.java, PARAMETERS)
+private val ON_SCALAR_METHOD = DIRECTIVE_HELPER.getMethod("onScalar", GraphQLScalarType::class.java, PARAMETERS)
+private val ON_ENUM_METHOD = DIRECTIVE_HELPER.getMethod("onEnum", GraphQLEnumType::class.java, PARAMETERS)
+private val ON_INPUT_OBJECT_TYPE = DIRECTIVE_HELPER.getMethod("onInputObjectType", GraphQLInputObjectType::class.java, PARAMETERS)
+
+/**
+ * Directive behavior is used to wire up directives during schema parsing. Unfortunately, SchemaGeneratorDirectiveHelper
+ * which contains the logic has package-private access to some members and must be therefore accessed via reflection.
+ */
+class DirectiveBehavior {
+
+    private val directiveHelper = SchemaGeneratorDirectiveHelper::class.createInstance()
+
+    fun onObject(element: GraphQLObjectType, params: Params): GraphQLObjectType =
+            ON_OBJECT_METHOD.invoke(directiveHelper, element, params.toParameters()) as GraphQLObjectType
+
+    fun onInterface(element: GraphQLInterfaceType, params: Params): GraphQLInterfaceType =
+            ON_INTERFACE_METHOD.invoke(directiveHelper, element, params.toParameters()) as GraphQLInterfaceType
+
+    fun onUnion(element: GraphQLUnionType, params: Params): GraphQLUnionType =
+            ON_UNION_METHOD.invoke(directiveHelper, element, params.toParameters()) as GraphQLUnionType
+
+    fun onScalar(element: GraphQLScalarType, params: Params): GraphQLScalarType =
+            ON_SCALAR_METHOD.invoke(directiveHelper, element, params.toParameters()) as GraphQLScalarType
+
+    fun onEnum(element: GraphQLEnumType, params: Params): GraphQLEnumType =
+            ON_ENUM_METHOD.invoke(directiveHelper, element, params.toParameters()) as GraphQLEnumType
+
+    fun onInputObject(element: GraphQLInputObjectType, params: Params): GraphQLInputObjectType =
+            ON_INPUT_OBJECT_TYPE.invoke(directiveHelper, element, params.toParameters()) as GraphQLInputObjectType
+
+    data class Params(val runtimeWiring: RuntimeWiring, val codeRegistryBuilder: GraphQLCodeRegistry.Builder) {
+        internal fun toParameters() = PARAMETERS
+                .getDeclaredConstructor(
+                        TypeDefinitionRegistry::class.java,
+                        RuntimeWiring::class.java,
+                        Map::class.java,
+                        GraphQLCodeRegistry.Builder::class.java
+                ).apply { isAccessible = true }
+                .newInstance(null, runtimeWiring, null, codeRegistryBuilder)
+    }
+}

src/main/kotlin/graphql/kickstart/tools/SchemaParser.kt

@@ -3,7 +3,6 @@ package graphql.kickstart.tools
 import graphql.introspection.Introspection
 import graphql.language.*
 import graphql.schema.*
-import graphql.schema.idl.DirectiveBehavior
 import graphql.schema.idl.RuntimeWiring
 import graphql.schema.idl.ScalarInfo
 import graphql.schema.idl.SchemaGeneratorHelper