public static class AnonymizeResult {

private GraphQLSchema schema;

private List<String> queries;

public AnonymizeResult(GraphQLSchema schema, List<String> queries) {

this.schema = schema;

this.queries = queries;

}

public GraphQLSchema getSchema() {

return schema;

}

public List<String> getQueries() {

return queries;

}

}

public static GraphQLSchema anonymizeSchema(String sdl) {

return anonymizeSchemaAndQueries(createdMockedSchema(sdl), Collections.emptyList(), Collections.emptyMap()).schema;

}

public static GraphQLSchema anonymizeSchema(GraphQLSchema schema) {

return anonymizeSchemaAndQueries(schema, Collections.emptyList(), Collections.emptyMap()).schema;

}

public static AnonymizeResult anonymizeSchemaAndQueries(String sdl, List<String> queries) {

return anonymizeSchemaAndQueries(createdMockedSchema(sdl), queries, Collections.emptyMap());

}

public static AnonymizeResult anonymizeSchemaAndQueries(GraphQLSchema schema, List<String> queries) {

return anonymizeSchemaAndQueries(schema, queries, Collections.emptyMap());

}

public static AnonymizeResult anonymizeSchemaAndQueries(String sdl, List<String> queries, Map<String, Object> variables) {

return anonymizeSchemaAndQueries(createdMockedSchema(sdl), queries, variables);

}

public static AnonymizeResult anonymizeSchemaAndQueries(GraphQLSchema schema, List<String> queries, Map<String, Object> variables) {

assertNotNull(queries, () -> "queries can't be null");

AtomicInteger defaultStringValueCounter = new AtomicInteger(1);

AtomicInteger defaultIntValueCounter = new AtomicInteger(1);

Map<GraphQLNamedSchemaElement, String> newNameMap = recordNewNamesForSchema(schema);

// stores a reverse index of anonymized argument name to argument instance

// this is to handle cases where the fields on implementing types MUST have the same exact argument and default

// value definitions as the fields on the implemented interface. (argument default values must match exactly)

Map<String, GraphQLArgument> renamedArgumentsMap = new HashMap<>();

SchemaTransformer schemaTransformer = new SchemaTransformer();

GraphQLSchema newSchema = schemaTransformer.transform(schema, new GraphQLTypeVisitorStub() {

@Override

public TraversalControl visitGraphQLTypeReference(GraphQLTypeReference graphQLTypeReference, TraverserContext<GraphQLSchemaElement> context) {

GraphQLNamedSchemaElement type = (GraphQLNamedSchemaElement) schema.getType(graphQLTypeReference.getName());

String newName = newNameMap.get(type);

GraphQLTypeReference newReference = GraphQLTypeReference.typeRef(newName);

return changeNode(context, newReference);

}

@Override

public TraversalControl visitGraphQLArgument(GraphQLArgument graphQLArgument, TraverserContext<GraphQLSchemaElement> context) {

String newName = assertNotNull(newNameMap.get(graphQLArgument));

if (context.getParentNode() instanceof GraphQLFieldDefinition) {

// arguments on field definitions must be identical across implementing types and interfaces.

if (renamedArgumentsMap.containsKey(newName)) {

return changeNode(context, renamedArgumentsMap.get(newName).transform(b -> {

}));

}

}

GraphQLArgument newElement = graphQLArgument.transform(builder -> {

builder.name(newName).description(null).definition(null);

if (graphQLArgument.hasSetDefaultValue()) {

Value<?> defaultValueLiteral = ValuesResolver.valueToLiteral(graphQLArgument.getArgumentDefaultValue(), graphQLArgument.getType());

builder.defaultValueLiteral(replaceValue(defaultValueLiteral, graphQLArgument.getType(), newNameMap, defaultStringValueCounter, defaultIntValueCounter));

}

if (graphQLArgument.hasSetValue()) {

Value<?> valueLiteral = ValuesResolver.valueToLiteral(graphQLArgument.getArgumentValue(), graphQLArgument.getType());

builder.valueLiteral(replaceValue(valueLiteral, graphQLArgument.getType(), newNameMap, defaultStringValueCounter, defaultIntValueCounter));

}

});

renamedArgumentsMap.put(newName, newElement);

return changeNode(context, newElement);

}

@Override

public TraversalControl visitGraphQLInterfaceType(GraphQLInterfaceType graphQLInterfaceType, TraverserContext<GraphQLSchemaElement> context) {

if (Introspection.isIntrospectionTypes(graphQLInterfaceType)) {

return TraversalControl.ABORT;

}

String newName = assertNotNull(newNameMap.get(graphQLInterfaceType));

GraphQLInterfaceType newElement = graphQLInterfaceType.transform(builder -> {

builder.name(newName).description(null).definition(null);

});

GraphQLCodeRegistry.Builder codeRegistry = assertNotNull(context.getVarFromParents(GraphQLCodeRegistry.Builder.class));

TypeResolver typeResolver = codeRegistry.getTypeResolver(graphQLInterfaceType);

codeRegistry.typeResolver(newName, typeResolver);

return changeNode(context, newElement);

}

@Override

public TraversalControl visitGraphQLEnumType(GraphQLEnumType graphQLEnumType, TraverserContext<GraphQLSchemaElement> context) {

if (Introspection.isIntrospectionTypes(graphQLEnumType)) {

return TraversalControl.ABORT;

}

String newName = assertNotNull(newNameMap.get(graphQLEnumType));

GraphQLEnumType newElement = graphQLEnumType.transform(builder -> {

builder.name(newName).description(null).definition(null);

});

return changeNode(context, newElement);

}

@Override

public TraversalControl visitGraphQLEnumValueDefinition(GraphQLEnumValueDefinition enumValueDefinition, TraverserContext<GraphQLSchemaElement> context) {

String newName = assertNotNull(newNameMap.get(enumValueDefinition));

GraphQLEnumValueDefinition newElement = enumValueDefinition.transform(builder -> {

builder.name(newName).description(null).definition(null);

});

return changeNode(context, newElement);

}

@Override

public TraversalControl visitGraphQLFieldDefinition(GraphQLFieldDefinition graphQLFieldDefinition, TraverserContext<GraphQLSchemaElement> context) {

String newName = assertNotNull(newNameMap.get(graphQLFieldDefinition));

GraphQLFieldDefinition newElement = graphQLFieldDefinition.transform(builder -> {

builder.name(newName).description(null).definition(null);

});

return changeNode(context, newElement);

}

@Override

public TraversalControl visitGraphQLDirective(GraphQLDirective graphQLDirective, TraverserContext<GraphQLSchemaElement> context) {

if (Directives.DEPRECATED_DIRECTIVE_DEFINITION.getName().equals(graphQLDirective.getName())) {

GraphQLArgument reason = newArgument().name("reason")

.type(Scalars.GraphQLString)

.clearValue().build();

GraphQLDirective newElement = graphQLDirective.transform(builder -> {

builder.description(null).argument(reason);

});

changeNode(context, newElement);

return TraversalControl.ABORT;

}

if (DirectiveInfo.isGraphqlSpecifiedDirective(graphQLDirective)) {

return TraversalControl.ABORT;

}

String newName = assertNotNull(newNameMap.get(graphQLDirective));

GraphQLDirective newElement = graphQLDirective.transform(builder -> {

builder.name(newName).description(null).definition(null);

});

return changeNode(context, newElement);

}

@Override

public TraversalControl visitGraphQLInputObjectField(GraphQLInputObjectField graphQLInputObjectField, TraverserContext<GraphQLSchemaElement> context) {

String newName = assertNotNull(newNameMap.get(graphQLInputObjectField));

Value<?> defaultValue = null;

if (graphQLInputObjectField.hasSetDefaultValue()) {

defaultValue = ValuesResolver.valueToLiteral(graphQLInputObjectField.getInputFieldDefaultValue(), graphQLInputObjectField.getType());

defaultValue = replaceValue(defaultValue, graphQLInputObjectField.getType(), newNameMap, defaultStringValueCounter, defaultIntValueCounter);

}

Value<?> finalDefaultValue = defaultValue;

GraphQLInputObjectField newElement = graphQLInputObjectField.transform(builder -> {

builder.name(newName);

if (finalDefaultValue != null) {

builder.defaultValueLiteral(finalDefaultValue);

}

builder.description(null);

builder.definition(null);

});

return changeNode(context, newElement);

}

@Override

public TraversalControl visitGraphQLInputObjectType(GraphQLInputObjectType graphQLInputObjectType, TraverserContext<GraphQLSchemaElement> context) {

if (Introspection.isIntrospectionTypes(graphQLInputObjectType)) {

return TraversalControl.ABORT;

}

String newName = assertNotNull(newNameMap.get(graphQLInputObjectType));

GraphQLInputObjectType newElement = graphQLInputObjectType.transform(builder -> {

builder.name(newName).description(null).definition(null);

});

return changeNode(context, newElement);

}

@Override

public TraversalControl visitGraphQLObjectType(GraphQLObjectType graphQLObjectType, TraverserContext<GraphQLSchemaElement> context) {

if (Introspection.isIntrospectionTypes(graphQLObjectType)) {

return TraversalControl.ABORT;

}

String newName = assertNotNull(newNameMap.get(graphQLObjectType));

GraphQLObjectType newElement = graphQLObjectType.transform(builder -> {

builder.name(newName).description(null).definition(null);

});

return changeNode(context, newElement);

}

@Override

public TraversalControl visitGraphQLScalarType(GraphQLScalarType graphQLScalarType, TraverserContext<GraphQLSchemaElement> context) {

if (ScalarInfo.isGraphqlSpecifiedScalar(graphQLScalarType)) {

return TraversalControl.ABORT;

}

String newName = assertNotNull(newNameMap.get(graphQLScalarType));

GraphQLScalarType newElement = graphQLScalarType.transform(builder -> {

builder.name(newName).description(null).definition(null);

});

return changeNode(context, newElement);

}

@Override

public TraversalControl visitGraphQLUnionType(GraphQLUnionType graphQLUnionType, TraverserContext<GraphQLSchemaElement> context) {

if (Introspection.isIntrospectionTypes(graphQLUnionType)) {

return TraversalControl.ABORT;

}

String newName = assertNotNull(newNameMap.get(graphQLUnionType));

GraphQLUnionType newElement = graphQLUnionType.transform(builder -> {

builder.name(newName).description(null).definition(null);

});

GraphQLCodeRegistry.Builder codeRegistry = assertNotNull(context.getVarFromParents(GraphQLCodeRegistry.Builder.class));

TypeResolver typeResolver = codeRegistry.getTypeResolver(graphQLUnionType);

codeRegistry.typeResolver(newName, typeResolver);

return changeNode(context, newElement);

}

});

List<String> newQueries = new ArrayList<>();

for (String query : queries) {

String newQuery = rewriteQuery(query, schema, newNameMap, variables);

newQueries.add(newQuery);

}

AnonymizeResult result = new AnonymizeResult(newSchema, newQueries);

return result;

}

private static Value replaceValue(Value valueLiteral, GraphQLInputType argType, Map<GraphQLNamedSchemaElement, String> newNameMap, AtomicInteger defaultStringValueCounter, AtomicInteger defaultIntValueCounter) {

if (valueLiteral instanceof ArrayValue) {

List<Value> values = ((ArrayValue) valueLiteral).getValues();

ArrayValue.Builder newArrayValueBuilder = ArrayValue.newArrayValue();

for (Value value : values) {

// [Type!]! -> Type!

GraphQLInputType unwrappedInputType = unwrapOneAs(unwrapNonNull(argType));

newArrayValueBuilder.value(replaceValue(value, unwrappedInputType, newNameMap, defaultStringValueCounter, defaultIntValueCounter));

}

return newArrayValueBuilder.build();

} else if (valueLiteral instanceof StringValue) {

return StringValue.newStringValue("stringValue" + defaultStringValueCounter.getAndIncrement()).build();

} else if (valueLiteral instanceof IntValue) {

return IntValue.newIntValue(BigInteger.valueOf(defaultIntValueCounter.getAndIncrement())).build();

} else if (valueLiteral instanceof EnumValue) {

GraphQLEnumType enumType = unwrapNonNullAs(argType);

GraphQLEnumValueDefinition enumValueDefinition = enumType.getValue(((EnumValue) valueLiteral).getName());

String newName = newNameMap.get(enumValueDefinition);

return new EnumValue(newName);

} else if (valueLiteral instanceof ObjectValue) {

GraphQLInputObjectType inputObjectType = unwrapNonNullAs(argType);

ObjectValue.Builder newObjectValueBuilder = ObjectValue.newObjectValue();

List<ObjectField> objectFields = ((ObjectValue) valueLiteral).getObjectFields();

for (ObjectField objectField : objectFields) {

String objectFieldName = objectField.getName();

Value objectFieldValue = objectField.getValue();

GraphQLInputObjectField inputObjectTypeField = inputObjectType.getField(objectFieldName);

GraphQLInputType fieldType = unwrapNonNullAs(inputObjectTypeField.getType());

ObjectField newObjectField = objectField.transform(builder -> {

builder.name(newNameMap.get(inputObjectTypeField));

builder.value(replaceValue(objectFieldValue, fieldType, newNameMap, defaultStringValueCounter, defaultIntValueCounter));

});

newObjectValueBuilder.objectField(newObjectField);

}

return newObjectValueBuilder.build();

}

return valueLiteral;

}

public static Map<GraphQLNamedSchemaElement, String> recordNewNamesForSchema(GraphQLSchema schema) {

AtomicInteger objectCounter = new AtomicInteger(1);

AtomicInteger inputObjectCounter = new AtomicInteger(1);

AtomicInteger inputObjectFieldCounter = new AtomicInteger(1);

AtomicInteger fieldCounter = new AtomicInteger(1);

AtomicInteger scalarCounter = new AtomicInteger(1);

AtomicInteger directiveCounter = new AtomicInteger(1);

AtomicInteger argumentCounter = new AtomicInteger(1);

AtomicInteger interfaceCounter = new AtomicInteger(1);

AtomicInteger unionCounter = new AtomicInteger(1);

AtomicInteger enumCounter = new AtomicInteger(1);

AtomicInteger enumValueCounter = new AtomicInteger(1);

Map<GraphQLNamedSchemaElement, String> newNameMap = new LinkedHashMap<>();

Map<String, String> directivesOriginalToNewNameMap = new HashMap<>();

// DirectiveName.argumentName -> newArgumentName

Map<String, String> seenArgumentsOnDirectivesMap = new HashMap<>();

Map<String, List<GraphQLImplementingType>> interfaceToImplementations =

new SchemaUtil().groupImplementationsForInterfacesAndObjects(schema);

GraphQLTypeVisitor visitor = new GraphQLTypeVisitorStub() {

@Override

public TraversalControl visitGraphQLArgument(GraphQLArgument graphQLArgument, TraverserContext<GraphQLSchemaElement> context) {

String curName = graphQLArgument.getName();

GraphQLSchemaElement parentNode = context.getParentNode();

if (parentNode instanceof GraphQLDirective) {

// if we already went over the argument for this directive name, no need to add new names

if (seenArgumentsOnDirectivesMap.containsKey(((GraphQLDirective) parentNode).getName() + graphQLArgument.getName())) {

newNameMap.put(graphQLArgument, seenArgumentsOnDirectivesMap.get(((GraphQLDirective) parentNode).getName() + graphQLArgument.getName()));

return CONTINUE;

}

String newName = "argument" + argumentCounter.getAndIncrement();

newNameMap.put(graphQLArgument, newName);

seenArgumentsOnDirectivesMap.put(((GraphQLDirective) parentNode).getName() + graphQLArgument.getName(), newName);

return CONTINUE;

}

if (!(parentNode instanceof GraphQLFieldDefinition)) {

String newName = "argument" + argumentCounter.getAndIncrement();

newNameMap.put(graphQLArgument, newName);

return CONTINUE;

}

GraphQLFieldDefinition fieldDefinition = (GraphQLFieldDefinition) parentNode;

String fieldName = fieldDefinition.getName();

GraphQLImplementingType implementingType = (GraphQLImplementingType) context.getParentContext().getParentNode();

Set<GraphQLFieldDefinition> matchingInterfaceFieldDefinitions = getSameFields(fieldName, implementingType.getName(), interfaceToImplementations, schema);

String newName;

if (matchingInterfaceFieldDefinitions.size() == 0) {

newName = "argument" + argumentCounter.getAndIncrement();

} else {

List<GraphQLArgument> matchingArgumentDefinitions = getMatchingArgumentDefinitions(curName, matchingInterfaceFieldDefinitions);

if (matchingArgumentDefinitions.size() == 0) {

newName = "argument" + argumentCounter.getAndIncrement();

} else {

if (newNameMap.containsKey(matchingArgumentDefinitions.get(0))) {

newName = newNameMap.get(matchingArgumentDefinitions.get(0));

} else {

newName = "argument" + argumentCounter.getAndIncrement();

for (GraphQLArgument argument : matchingArgumentDefinitions) {

newNameMap.put(argument, newName);

}

}

}

}

newNameMap.put(graphQLArgument, newName);

return CONTINUE;

}

@Override

public TraversalControl visitGraphQLInterfaceType(GraphQLInterfaceType graphQLInterfaceType, TraverserContext<GraphQLSchemaElement> context) {

if (Introspection.isIntrospectionTypes(graphQLInterfaceType)) {

return TraversalControl.ABORT;

}

String newName = "Interface" + interfaceCounter.getAndIncrement();

newNameMap.put(graphQLInterfaceType, newName);

return CONTINUE;

}

@Override

public TraversalControl visitGraphQLEnumType(GraphQLEnumType graphQLEnumType, TraverserContext<GraphQLSchemaElement> context) {

if (Introspection.isIntrospectionTypes(graphQLEnumType)) {

return TraversalControl.ABORT;

}

String newName = "Enum" + enumCounter.getAndIncrement();

newNameMap.put(graphQLEnumType, newName);

return CONTINUE;

}

@Override

public TraversalControl visitGraphQLEnumValueDefinition(GraphQLEnumValueDefinition enumValueDefinition, TraverserContext<GraphQLSchemaElement> context) {

String newName = "EnumValue" + enumValueCounter.getAndIncrement();

newNameMap.put(enumValueDefinition, newName);

return CONTINUE;

}

@Override

public TraversalControl visitGraphQLFieldDefinition(GraphQLFieldDefinition graphQLFieldDefinition, TraverserContext<GraphQLSchemaElement> context) {

String fieldName = graphQLFieldDefinition.getName();

GraphQLImplementingType parentNode = (GraphQLImplementingType) context.getParentNode();

Set<GraphQLFieldDefinition> sameFields = getSameFields(fieldName, parentNode.getName(), interfaceToImplementations, schema);

String newName;

if (sameFields.size() == 0) {

newName = "field" + fieldCounter.getAndIncrement();

} else {

if (newNameMap.containsKey(sameFields.iterator().next())) {

newName = newNameMap.get(sameFields.iterator().next());

} else {

newName = "field" + fieldCounter.getAndIncrement();

for (GraphQLFieldDefinition fieldDefinition : sameFields) {

newNameMap.put(fieldDefinition, newName);

}

}

}

newNameMap.put(graphQLFieldDefinition, newName);

return CONTINUE;

}

@Override

public TraversalControl visitGraphQLDirective(GraphQLDirective graphQLDirective, TraverserContext<GraphQLSchemaElement> context) {

if (DirectiveInfo.isGraphqlSpecifiedDirective(graphQLDirective)) {

return TraversalControl.ABORT;

}

String directiveName = graphQLDirective.getName();

if (directivesOriginalToNewNameMap.containsKey(directiveName)) {

newNameMap.put(graphQLDirective, directivesOriginalToNewNameMap.get(directiveName));

return CONTINUE;

}

String newName = "Directive" + directiveCounter.getAndIncrement();

newNameMap.put(graphQLDirective, newName);

directivesOriginalToNewNameMap.put(directiveName, newName);

return CONTINUE;

}

@Override

public TraversalControl visitGraphQLInputObjectField(GraphQLInputObjectField graphQLInputObjectField, TraverserContext<GraphQLSchemaElement> context) {

String newName = "inputField" + inputObjectFieldCounter.getAndIncrement();

newNameMap.put(graphQLInputObjectField, newName);

return CONTINUE;

}

@Override

public TraversalControl visitGraphQLInputObjectType(GraphQLInputObjectType graphQLInputObjectType, TraverserContext<GraphQLSchemaElement> context) {

if (Introspection.isIntrospectionTypes(graphQLInputObjectType)) {

return TraversalControl.ABORT;

}

String newName = "InputObject" + inputObjectCounter.getAndIncrement();

newNameMap.put(graphQLInputObjectType, newName);

return CONTINUE;

}

@Override

public TraversalControl visitGraphQLObjectType(GraphQLObjectType graphQLObjectType, TraverserContext<GraphQLSchemaElement> context) {

if (Introspection.isIntrospectionTypes(graphQLObjectType)) {

return TraversalControl.ABORT;

}

String newName = "Object" + objectCounter.getAndIncrement();

newNameMap.put(graphQLObjectType, newName);

return CONTINUE;

}

@Override

public TraversalControl visitGraphQLScalarType(GraphQLScalarType graphQLScalarType, TraverserContext<GraphQLSchemaElement> context) {

if (ScalarInfo.isGraphqlSpecifiedScalar(graphQLScalarType)) {

return TraversalControl.ABORT;

}

String newName = "Scalar" + scalarCounter.getAndIncrement();

newNameMap.put(graphQLScalarType, newName);

return CONTINUE;

}

@Override

public TraversalControl visitGraphQLUnionType(GraphQLUnionType graphQLUnionType, TraverserContext<GraphQLSchemaElement> context) {

if (Introspection.isIntrospectionTypes(graphQLUnionType)) {

return TraversalControl.ABORT;

}

String newName = "Union" + unionCounter.getAndIncrement();

newNameMap.put(graphQLUnionType, newName);

return CONTINUE;

}

};

SchemaTransformer.transformSchema(schema, visitor);

return newNameMap;

}

private static Set<GraphQLFieldDefinition> getSameFields(String fieldName,

String objectOrInterfaceName,

Map<String, List<GraphQLImplementingType>> interfaceToImplementations,

GraphQLSchema schema

) {

Set<GraphQLFieldDefinition> result = new LinkedHashSet<>();

Set<String> alreadyChecked = new LinkedHashSet<>();

getSameFieldsImpl(fieldName, objectOrInterfaceName, interfaceToImplementations, schema, alreadyChecked, result);

return result;

}

private static void getSameFieldsImpl(String fieldName,

String curObjectOrInterface,

Map<String, List<GraphQLImplementingType>> interfaceToImplementations,

GraphQLSchema schema,

Set<String> alreadyChecked,

Set<GraphQLFieldDefinition> result) {

if (alreadyChecked.contains(curObjectOrInterface)) {

return;

}

alreadyChecked.add(curObjectOrInterface);

// "up": get all Interfaces

GraphQLImplementingType type = (GraphQLImplementingType) schema.getType(curObjectOrInterface);

List<GraphQLNamedOutputType> interfaces = type.getInterfaces();

getMatchingFieldDefinitions(fieldName, interfaces, result);

for (GraphQLNamedOutputType interfaze : interfaces) {

getSameFieldsImpl(fieldName, interfaze.getName(), interfaceToImplementations, schema, alreadyChecked, result);

}

// "down": get all Object or Interfaces

List<GraphQLImplementingType> implementations = interfaceToImplementations.get(curObjectOrInterface);

if (implementations == null) {

return;

}

getMatchingFieldDefinitions(fieldName, implementations, result);

for (GraphQLImplementingType implementingType : implementations) {

getSameFieldsImpl(fieldName, implementingType.getName(), interfaceToImplementations, schema, alreadyChecked, result);

}

}

private static void getMatchingFieldDefinitions(

String fieldName,

List<? extends GraphQLType> interfaces,

Set<GraphQLFieldDefinition> result) {

for (GraphQLType iface : interfaces) {

GraphQLImplementingType implementingType = (GraphQLImplementingType) iface;

if (implementingType.getFieldDefinition(fieldName) != null) {

result.add(implementingType.getFieldDefinition(fieldName));

}

}

}

private static List<GraphQLArgument> getMatchingArgumentDefinitions(

String name,

Set<GraphQLFieldDefinition> fieldDefinitions) {

List<GraphQLArgument> result = new ArrayList<>();

for (GraphQLFieldDefinition fieldDefinition : fieldDefinitions) {

Optional.ofNullable(fieldDefinition.getArgument(name)).map(result::add);

}

return result;

}

private static String rewriteQuery(String query, GraphQLSchema schema, Map<GraphQLNamedSchemaElement, String> newNames, Map<String, Object> variables) {

AtomicInteger fragmentCounter = new AtomicInteger(1);

AtomicInteger variableCounter = new AtomicInteger(1);

Map<Node, String> astNodeToNewName = new LinkedHashMap<>();

Map<String, String> variableNames = new LinkedHashMap<>();

Map<Field, GraphQLFieldDefinition> fieldToFieldDefinition = new LinkedHashMap<>();

Document document = new Parser().parseDocument(query);

assertUniqueOperation(document);

QueryTraverser queryTraverser = QueryTraverser.newQueryTraverser().document(document).schema(schema).variables(variables).build();

queryTraverser.visitDepthFirst(new QueryVisitor() {

@Override

public void visitField(QueryVisitorFieldEnvironment env) {

if (env.isTypeNameIntrospectionField()) {

return;

}

fieldToFieldDefinition.put(env.getField(), env.getFieldDefinition());

String newName = assertNotNull(newNames.get(env.getFieldDefinition()));

Field field = env.getField();

astNodeToNewName.put(field, newName);

List<Directive> directives = field.getDirectives();

for (Directive directive : directives) {

// this is a directive definition

GraphQLDirective directiveDefinition = assertNotNull(schema.getDirective(directive.getName()), () -> format("%s directive definition not found ", directive.getName()));

String directiveName = directiveDefinition.getName();

String newDirectiveName = assertNotNull(newNames.get(directiveDefinition), () -> format("No new name found for directive %s", directiveName));

astNodeToNewName.put(directive, newDirectiveName);

for (Argument argument : directive.getArguments()) {

GraphQLArgument argumentDefinition = directiveDefinition.getArgument(argument.getName());

String newArgumentName = assertNotNull(newNames.get(argumentDefinition), () -> format("%s no new name found for directive argument %s %s", directiveName, argument.getName()));

astNodeToNewName.put(argument, newArgumentName);

visitDirectiveArgumentValues(directive, argument.getValue());

}

}

}

private void visitDirectiveArgumentValues(Directive directive, Value value) {

if (value instanceof VariableReference) {

String name = ((VariableReference) value).getName();

if (!variableNames.containsKey(name)) {

String newName = "var" + variableCounter.getAndIncrement();

variableNames.put(name, newName);

}

}

}

@Override

public void visitInlineFragment(QueryVisitorInlineFragmentEnvironment queryVisitorInlineFragmentEnvironment) {

}

@Override

public TraversalControl visitArgumentValue(QueryVisitorFieldArgumentValueEnvironment environment) {

QueryVisitorFieldArgumentInputValue argumentInputValue = environment.getArgumentInputValue();

if (argumentInputValue.getValue() instanceof VariableReference) {

String name = ((VariableReference) argumentInputValue.getValue()).getName();

if (!variableNames.containsKey(name)) {

String newName = "var" + variableCounter.getAndIncrement();

variableNames.put(name, newName);

}

}

return CONTINUE;

}

@Override

public void visitFragmentSpread(QueryVisitorFragmentSpreadEnvironment queryVisitorFragmentSpreadEnvironment) {

FragmentDefinition fragmentDefinition = queryVisitorFragmentSpreadEnvironment.getFragmentDefinition();

String newName;

if (!astNodeToNewName.containsKey(fragmentDefinition)) {

newName = "Fragment" + fragmentCounter.getAndIncrement();

astNodeToNewName.put(fragmentDefinition, newName);

} else {

newName = astNodeToNewName.get(fragmentDefinition);

}

astNodeToNewName.put(queryVisitorFragmentSpreadEnvironment.getFragmentSpread(), newName);

}

@Override

public TraversalControl visitArgument(QueryVisitorFieldArgumentEnvironment environment) {

String newName = assertNotNull(newNames.get(environment.getGraphQLArgument()));

astNodeToNewName.put(environment.getArgument(), newName);

return CONTINUE;

}

});

AtomicInteger stringValueCounter = new AtomicInteger(1);

AtomicInteger intValueCounter = new AtomicInteger(1);

AstTransformer astTransformer = new AstTransformer();

AtomicInteger aliasCounter = new AtomicInteger(1);

AtomicInteger defaultStringValueCounter = new AtomicInteger(1);

AtomicInteger defaultIntValueCounter = new AtomicInteger(1);

Document newDocument = (Document) astTransformer.transform(document, new NodeVisitorStub() {

@Override

public TraversalControl visitDirective(Directive directive, TraverserContext<Node> context) {

String newName = assertNotNull(astNodeToNewName.get(directive));

GraphQLDirective directiveDefinition = schema.getDirective(directive.getName());

context.setVar(GraphQLDirective.class, directiveDefinition);

return changeNode(context, directive.transform(builder -> builder.name(newName)));

}

@Override

public TraversalControl visitOperationDefinition(OperationDefinition node, TraverserContext<Node> context) {

if (node.getName() != null) {

return changeNode(context, node.transform(builder -> builder.name("operation")));

} else {

return CONTINUE;

}

}

@Override

public TraversalControl visitField(Field field, TraverserContext<Node> context) {

String newAlias = null;

if (field.getAlias() != null) {

newAlias = "alias" + aliasCounter.getAndIncrement();

}

String newName;

if (field.getName().equals(Introspection.TypeNameMetaFieldDef.getName())) {

newName = Introspection.TypeNameMetaFieldDef.getName();

} else {

newName = assertNotNull(astNodeToNewName.get(field));

context.setVar(GraphQLFieldDefinition.class, assertNotNull(fieldToFieldDefinition.get(field)));

}

String finalNewAlias = newAlias;

return changeNode(context, field.transform(builder -> builder.name(newName).alias(finalNewAlias)));

}

@Override

public TraversalControl visitVariableDefinition(VariableDefinition node, TraverserContext<Node> context) {

String newName = assertNotNull(variableNames.get(node.getName()));

VariableDefinition newNode = node.transform(builder -> {

builder.name(newName).comments(Collections.emptyList());

// convert variable language type to renamed language type

TypeName typeName = TypeUtil.unwrapAll(node.getType());

GraphQLNamedType originalType = schema.getTypeAs(typeName.getName());

// has the type name changed? (standard scalars such as String don't change)

if (newNames.containsKey(originalType)) {

String newTypeName = newNames.get(originalType);

builder.type(replaceTypeName(node.getType(), newTypeName));

}

if (node.getDefaultValue() != null) {

Value<?> defaultValueLiteral = node.getDefaultValue();

GraphQLType graphQLType = fromTypeToGraphQLType(node.getType(), schema);

builder.defaultValue(replaceValue(defaultValueLiteral, (GraphQLInputType) graphQLType, newNames, defaultStringValueCounter, defaultIntValueCounter));

}

});

return changeNode(context, newNode);

}

@Override

public TraversalControl visitVariableReference(VariableReference node, TraverserContext<Node> context) {

String newName = assertNotNull(variableNames.get(node.getName()), () -> format("No new variable name found for %s", node.getName()));

return changeNode(context, node.transform(builder -> builder.name(newName)));

}

@Override

public TraversalControl visitFragmentDefinition(FragmentDefinition node, TraverserContext<Node> context) {

String newName = assertNotNull(astNodeToNewName.get(node));

GraphQLType currentCondition = assertNotNull(schema.getType(node.getTypeCondition().getName()));

String newCondition = newNames.get(currentCondition);

return changeNode(context, node.transform(builder -> builder.name(newName).typeCondition(new TypeName(newCondition))));

}

@Override

public TraversalControl visitInlineFragment(InlineFragment node, TraverserContext<Node> context) {

GraphQLType currentCondition = assertNotNull(schema.getType(node.getTypeCondition().getName()));

String newCondition = newNames.get(currentCondition);

return changeNode(context, node.transform(builder -> builder.typeCondition(new TypeName(newCondition))));

}

@Override

public TraversalControl visitFragmentSpread(FragmentSpread node, TraverserContext<Node> context) {

String newName = assertNotNull(astNodeToNewName.get(node));

return changeNode(context, node.transform(builder -> builder.name(newName)));

}

@Override

public TraversalControl visitArgument(Argument argument, TraverserContext<Node> context) {

GraphQLArgument graphQLArgumentDefinition;

// An argument is either from a applied query directive or from a field

if (context.getVarFromParents(GraphQLDirective.class) != null) {

GraphQLDirective directiveDefinition = context.getVarFromParents(GraphQLDirective.class);

graphQLArgumentDefinition = directiveDefinition.getArgument(argument.getName());

} else {

GraphQLFieldDefinition graphQLFieldDefinition = assertNotNull(context.getVarFromParents(GraphQLFieldDefinition.class));

graphQLArgumentDefinition = graphQLFieldDefinition.getArgument(argument.getName());

}

GraphQLInputType argumentType = graphQLArgumentDefinition.getType();

String newName = assertNotNull(astNodeToNewName.get(argument));

Value newValue = replaceValue(argument.getValue(), argumentType, newNames, defaultStringValueCounter, defaultIntValueCounter);

return changeNode(context, argument.transform(builder -> builder.name(newName).value(newValue)));

}

});

return AstPrinter.printAstCompact(newDocument);

}

// converts language [Type!] to [GraphQLType!] using the exact same GraphQLType instance from

// the provided schema

private static GraphQLType fromTypeToGraphQLType(Type type, GraphQLSchema schema) {

if (type instanceof TypeName) {

String typeName = ((TypeName) type).getName();

GraphQLType graphQLType = schema.getType(typeName);

graphql.Assert.assertNotNull(graphQLType, () -> "Schema must contain type " + typeName);

return graphQLType;

} else if (type instanceof NonNullType) {

return GraphQLNonNull.nonNull(fromTypeToGraphQLType(TypeUtil.unwrapOne(type), schema));

} else if (type instanceof ListType) {

return GraphQLList.list(fromTypeToGraphQLType(TypeUtil.unwrapOne(type), schema));

} else {

graphql.Assert.assertShouldNeverHappen();

return null;

}

}

// rename a language type. e.g: [[Character!]!] -> [[NewName!]!]

private static Type replaceTypeName(Type type, String newName) {

if (type instanceof TypeName) {

return TypeName.newTypeName(newName).build();

} else if (type instanceof ListType) {

return ListType.newListType(replaceTypeName(((ListType) type).getType(), newName)).build();

} else if (type instanceof NonNullType) {

return NonNullType.newNonNullType(replaceTypeName(((NonNullType) type).getType(), newName)).build();

} else {

graphql.Assert.assertShouldNeverHappen();

return null;

}

}

private static void assertUniqueOperation(Document document) {

String operationName = null;

for (Definition definition : document.getDefinitions()) {

if (definition instanceof OperationDefinition) {

if (operationName != null) {

throw new AssertException("Query must have exactly one operation");

}

OperationDefinition operationDefinition = (OperationDefinition) definition;

operationName = operationDefinition.getName();

}

}

}

}