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Enhance type mapping in union #140

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May 20, 2018
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Enhance type mapping in union #140

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13 changes: 12 additions & 1 deletion src/main/kotlin/com/coxautodev/graphql/tools/DictionaryTypeResolver.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -12,10 +12,21 @@ import graphql.schema.TypeResolver
* @author Andrew Potter
*/
abstract class DictionaryTypeResolver(private val dictionary: BiMap<Class<*>, TypeDefinition<*>>, private val types: Map<String, GraphQLObjectType>) : TypeResolver {
private fun <T> getTypeName(clazz: Class<T>): String? {
val name = dictionary[clazz]?.name

if (name == null && clazz.superclass != null) {
return getTypeName(clazz.superclass)
}

return name
}

override fun getType(env: TypeResolutionEnvironment): GraphQLObjectType? {
val clazz = env.getObject<Any>().javaClass
val name = dictionary[clazz]?.name ?: clazz.simpleName
val name = clazz.interfaces.fold(getTypeName(clazz), { name, interfaceClazz ->
name ?: getTypeName(interfaceClazz)
}) ?: clazz.simpleName

return types[name] ?: throw TypeResolverError(getError(name))
}
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