Introduce support for custom context type for resolvers

Author: pgutkowski

.gitignore

@@ -1,3 +1,4 @@
 build
 .gradle
-.idea
+.idea
+/out

README.MD

@@ -3,7 +3,7 @@
 [![Build Status](https://travis-ci.org/pgutkowski/KGraphQL.svg?branch=master)](https://travis-ci.org/pgutkowski/KGraphQL)
 [![codebeat badge](https://codebeat.co/badges/b26d3c87-7cd1-4358-93cd-45d395669bdc)](https://codebeat.co/projects/github-com-pgutkowski-kgraphql-master)
 [![Coverage Status](https://coveralls.io/repos/github/pgutkowski/KGraphQL/badge.svg?branch=master)](https://coveralls.io/github/pgutkowski/KGraphQL?branch=master)
-[ ![Download](https://api.bintray.com/packages/pgutkowski/Maven/KGraphQL/images/download.svg) ](https://bintray.com/pgutkowski/Maven/KGraphQL/_latestVersion)
+[![Download](https://api.bintray.com/packages/pgutkowski/Maven/KGraphQL/images/download.svg) ](https://bintray.com/pgutkowski/Maven/KGraphQL/_latestVersion)
 [![Awesome Kotlin Badge](https://kotlin.link/awesome-kotlin.svg)](https://github.com/KotlinBy/awesome-kotlin)
 
 KGraphQL is [Kotlin](https://kotlinlang.org/) implementation of [GraphQL](http://graphql.org/). It provides rich DSL to setup GraphQL schema. 

build.gradle

@@ -2,7 +2,7 @@ group 'com.github.pgutkowski'
 version '0.2.3'
 
 buildscript {
-    ext.kotlin_version = '1.1.3'
+    ext.kotlin_version = '1.1.4'
 
     repositories {
         mavenCentral()
@@ -30,9 +30,6 @@ apply plugin: "com.jfrog.bintray"
 
 repositories {
     mavenCentral()
-    maven {
-        url "http://dl.bintray.com/kotlin/kotlin-eap-1.1"
-    }
     jcenter()
 }
 

src/jmh/kotlin/com/github/pgutkowski/kgraphql/BenchmarkSchema.kt

@@ -21,7 +21,7 @@ object BenchmarkSchema {
 
     val threeResolver : ()-> ModelThree = { ModelThree("", ones.map { ModelTwo(it, it.quantity..10) }) }
 
-    fun create(block : SchemaBuilder.()-> Unit): Schema = KGraphQL.schema {
+    fun create(block : SchemaBuilder<Unit>.()-> Unit): Schema<Unit> = KGraphQL.schema {
         block()
         query("one"){
             resolver(oneResolver)

src/jmh/kotlin/com/github/pgutkowski/kgraphql/ParallelExecutionBenchmark.kt

@@ -22,7 +22,7 @@ import java.util.concurrent.TimeUnit
 @Fork(value = 5)
 open class ParallelExecutionBenchmark {
 
-    var schema : Schema = KGraphQL.schema {  }
+    var schema : Schema<Unit> = KGraphQL.schema {  }
 
     @Setup
     fun setup(){

src/jmh/kotlin/com/github/pgutkowski/kgraphql/RequestCachingBenchmark.kt

@@ -23,7 +23,7 @@ open class RequestCachingBenchmark {
     @Param("true", "false")
     var caching = true
 
-    lateinit var schema : Schema
+    lateinit var schema : Schema<Unit>
 
     @Setup
     fun setup(){

src/jmh/kotlin/com/github/pgutkowski/kgraphql/SimpleExecutionOverheadBenchmark.kt

@@ -28,7 +28,7 @@ open class SimpleExecutionOverheadBenchmark {
     @Param("true", "false")
     var withKGraphQL = true
 
-    lateinit var schema : Schema
+    lateinit var schema : Schema<Unit>
 
     lateinit var objectMapper : ObjectMapper
 

src/main/kotlin/com/github/pgutkowski/kgraphql/KGraphQL.kt

@@ -2,12 +2,18 @@ package com.github.pgutkowski.kgraphql
 
 import com.github.pgutkowski.kgraphql.schema.Schema
 import com.github.pgutkowski.kgraphql.schema.dsl.SchemaBuilder
+import kotlin.reflect.KClass
 
 
 class KGraphQL {
     companion object {
-        fun schema(init : SchemaBuilder.() -> Unit) : Schema {
-            return SchemaBuilder(init).build()
+        fun schema(init : SchemaBuilder<Unit>.() -> Unit) = schema(Unit::class, init)
+
+        /**
+         * accepts instance of [KClass], instead of reified generic to avoid method signature clash
+         */
+        fun <Context : Any> schema(contextClass: KClass<Context>, init : SchemaBuilder<Context>.() -> Unit) : Schema<Context> {
+            return SchemaBuilder(init).build(contextClass)
         }
     }
 }

src/main/kotlin/com/github/pgutkowski/kgraphql/request/Variables.kt

@@ -10,7 +10,7 @@ import kotlin.reflect.KType
 
 @Suppress("UNCHECKED_CAST")
 data class Variables(
-        private val typeDefinitionProvider: LookupSchema,
+        private val typeDefinitionProvider: LookupSchema<*>,
         private val variablesJson: VariablesJson,
         private val variables: List<OperationVariable>?
 ) {

src/main/kotlin/com/github/pgutkowski/kgraphql/request/VariablesJson.kt

@@ -14,7 +14,7 @@ import kotlin.reflect.jvm.jvmErasure
 /**
  * Represents already parsed variables json
  */
-interface VariablesJson{
+interface VariablesJson {
 
     fun <T : Any>get(kClass: KClass<T>, kType: KType, key : String) : T?