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package graphql.util;
import graphql.AssertException;
import graphql.analysis.QueryTraverser;
import graphql.analysis.QueryVisitor;
import graphql.analysis.QueryVisitorFieldArgumentEnvironment;
import graphql.analysis.QueryVisitorFieldArgumentInputValue;
import graphql.analysis.QueryVisitorFieldArgumentValueEnvironment;
import graphql.analysis.QueryVisitorFieldEnvironment;
import graphql.analysis.QueryVisitorFragmentSpreadEnvironment;
import graphql.analysis.QueryVisitorInlineFragmentEnvironment;
import graphql.introspection.Introspection;
import graphql.language.Argument;
import graphql.language.AstPrinter;
import graphql.language.AstTransformer;
import graphql.language.Definition;
import graphql.language.Document;
import graphql.language.Field;
import graphql.language.FragmentDefinition;
import graphql.language.FragmentSpread;
import graphql.language.InlineFragment;
import graphql.language.IntValue;
import graphql.language.Node;
import graphql.language.NodeVisitorStub;
import graphql.language.OperationDefinition;
import graphql.language.StringValue;
import graphql.language.TypeName;
import graphql.language.VariableDefinition;
import graphql.language.VariableReference;
import graphql.parser.Parser;
import graphql.schema.GraphQLArgument;
import graphql.schema.GraphQLCodeRegistry;
import graphql.schema.GraphQLDirective;
import graphql.schema.GraphQLEnumType;
import graphql.schema.GraphQLEnumValueDefinition;
import graphql.schema.GraphQLFieldDefinition;
import graphql.schema.GraphQLImplementingType;
import graphql.schema.GraphQLInputObjectField;
import graphql.schema.GraphQLInputObjectType;
import graphql.schema.GraphQLInterfaceType;
import graphql.schema.GraphQLNamedOutputType;
import graphql.schema.GraphQLNamedSchemaElement;
import graphql.schema.GraphQLObjectType;
import graphql.schema.GraphQLScalarType;
import graphql.schema.GraphQLSchema;
import graphql.schema.GraphQLSchemaElement;
import graphql.schema.GraphQLType;
import graphql.schema.GraphQLTypeVisitor;
import graphql.schema.GraphQLTypeVisitorStub;
import graphql.schema.GraphQLUnionType;
import graphql.schema.SchemaTransformer;
import graphql.schema.TypeResolver;
import graphql.schema.idl.DirectiveInfo;
import graphql.schema.idl.ScalarInfo;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.atomic.AtomicInteger;
import static graphql.Assert.assertNotNull;
import static graphql.util.TraversalControl.CONTINUE;
import static graphql.util.TreeTransformerUtil.changeNode;
public class Anonymizer {
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(GraphQLSchema schema) {
return anonymizeSchemaAndQueries(schema, Collections.emptyList(), Collections.emptyMap()).schema;
}
public static AnonymizeResult anonymizeSchemaAndQueries(GraphQLSchema schema, List<String> queries) {
return anonymizeSchemaAndQueries(schema, queries, Collections.emptyMap());
}
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 = recordNewNames(schema);
SchemaTransformer schemaTransformer = new SchemaTransformer();
GraphQLSchema newSchema = schemaTransformer.transform(schema, new GraphQLTypeVisitorStub() {
@Override
public TraversalControl visitGraphQLArgument(GraphQLArgument graphQLArgument, TraverserContext<GraphQLSchemaElement> context) {
String newName = assertNotNull(newNameMap.get(graphQLArgument));
Object defaultValue = replaceDefaultValue(graphQLArgument.getDefaultValue(), defaultStringValueCounter, defaultIntValueCounter);
GraphQLArgument newElement = graphQLArgument.transform(builder -> {
builder.name(newName).defaultValue(defaultValue);
});
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);
});
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);
});
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);
});
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);
});
return changeNode(context, newElement);
}
@Override
public TraversalControl visitGraphQLDirective(GraphQLDirective graphQLDirective, TraverserContext<GraphQLSchemaElement> context) {
if (DirectiveInfo.isGraphqlSpecifiedDirective(graphQLDirective)) {
return TraversalControl.ABORT;
}
String newName = assertNotNull(newNameMap.get(graphQLDirective));
GraphQLDirective newElement = graphQLDirective.transform(builder -> {
builder.name(newName);
});
return changeNode(context, newElement);
}
@Override
public TraversalControl visitGraphQLInputObjectField(GraphQLInputObjectField graphQLInputObjectField, TraverserContext<GraphQLSchemaElement> context) {
String newName = assertNotNull(newNameMap.get(graphQLInputObjectField));
Object defaultValue = graphQLInputObjectField.getDefaultValue();
defaultValue = replaceDefaultValue(defaultValue, defaultStringValueCounter, defaultIntValueCounter);
Object finalDefaultValue = defaultValue;
GraphQLInputObjectField newElement = graphQLInputObjectField.transform(builder -> {
builder.name(newName);
builder.defaultValue(finalDefaultValue);
});
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);
});
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);
});
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);
});
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);
});
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 Object replaceDefaultValue(Object defaultValue, AtomicInteger defaultStringValueCounter, AtomicInteger defaultIntValueCounter) {
if (defaultValue instanceof String) {
defaultValue = "defaultValue" + defaultStringValueCounter.getAndIncrement();
} else if (defaultValue instanceof Integer) {
defaultValue = defaultIntValueCounter.getAndIncrement();
}
return defaultValue;
}
public static Map<GraphQLNamedSchemaElement, String> recordNewNames(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<>();
GraphQLTypeVisitor visitor = new GraphQLTypeVisitorStub() {
@Override
public TraversalControl visitGraphQLArgument(GraphQLArgument graphQLArgument, TraverserContext<GraphQLSchemaElement> context) {
String curName = graphQLArgument.getName();
GraphQLSchemaElement parentNode = context.getParentNode();
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();
List<GraphQLFieldDefinition> matchingInterfaceFieldDefinitions = getMatchingInterfaceFieldDefinitions(fieldName, implementingType.getInterfaces());
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 curName = graphQLFieldDefinition.getName();
GraphQLImplementingType parentNode = (GraphQLImplementingType) context.getParentNode();
List<GraphQLNamedOutputType> interfaces = parentNode.getInterfaces();
List<GraphQLFieldDefinition> matchingInterfaceFieldDefinitions = getMatchingInterfaceFieldDefinitions(curName, interfaces);
String newName;
if (matchingInterfaceFieldDefinitions.size() == 0) {
newName = "field" + fieldCounter.getAndIncrement();
} else {
if (newNameMap.containsKey(matchingInterfaceFieldDefinitions.get(0))) {
newName = newNameMap.get(matchingInterfaceFieldDefinitions.get(0));
} else {
newName = "field" + fieldCounter.getAndIncrement();
for (GraphQLFieldDefinition fieldDefinition : matchingInterfaceFieldDefinitions) {
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 newName = "Directive" + directiveCounter.getAndIncrement();
newNameMap.put(graphQLDirective, 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 List<GraphQLFieldDefinition> getMatchingInterfaceFieldDefinitions(
String curName,
List<GraphQLNamedOutputType> interfaces) {
List<GraphQLFieldDefinition> matchingInterfaceFieldDefinitions = new ArrayList<>();
for (GraphQLNamedOutputType iface : interfaces) {
GraphQLInterfaceType interfaceType = (GraphQLInterfaceType) iface;
if (interfaceType.getFieldDefinition(curName) != null) {
matchingInterfaceFieldDefinitions.add(interfaceType.getFieldDefinition(curName));
}
}
return matchingInterfaceFieldDefinitions;
}
private static List<GraphQLArgument> getMatchingArgumentDefinitions(
String name,
List<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> nodeToNewName = new LinkedHashMap<>();
Map<String, String> variableNames = 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 queryVisitorFieldEnvironment) {
if (queryVisitorFieldEnvironment.isTypeNameIntrospectionField()) {
return;
}
String newName = assertNotNull(newNames.get(queryVisitorFieldEnvironment.getFieldDefinition()));
nodeToNewName.put(queryVisitorFieldEnvironment.getField(), 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 (!nodeToNewName.containsKey(fragmentDefinition)) {
newName = "Fragment" + fragmentCounter.getAndIncrement();
nodeToNewName.put(fragmentDefinition, newName);
} else {
newName = nodeToNewName.get(fragmentDefinition);
}
nodeToNewName.put(queryVisitorFragmentSpreadEnvironment.getFragmentSpread(), newName);
}
@Override
public TraversalControl visitArgument(QueryVisitorFieldArgumentEnvironment environment) {
String newName = assertNotNull(newNames.get(environment.getGraphQLArgument()));
nodeToNewName.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);
Document newDocument = (Document) astTransformer.transform(document, new NodeVisitorStub() {
@Override
public TraversalControl visitStringValue(StringValue node, TraverserContext<Node> context) {
return changeNode(context, node.transform(builder -> builder.value("stringValue" + stringValueCounter.getAndIncrement())));
}
@Override
public TraversalControl visitIntValue(IntValue node, TraverserContext<Node> context) {
return changeNode(context, node.transform(builder -> builder.value(BigInteger.valueOf(intValueCounter.getAndIncrement()))));
}
@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 node, TraverserContext<Node> context) {
String newAlias = null;
if (node.getAlias() != null) {
newAlias = "alias" + aliasCounter.getAndIncrement();
}
String newName;
if (node.getName().equals(Introspection.TypeNameMetaFieldDef.getName())) {
newName = Introspection.TypeNameMetaFieldDef.getName();
} else {
newName = assertNotNull(nodeToNewName.get(node));
}
String finalNewAlias = newAlias;
return changeNode(context, node.transform(builder -> builder.name(newName).alias(finalNewAlias)));
}
@Override
public TraversalControl visitVariableDefinition(VariableDefinition node, TraverserContext<Node> context) {
String newName = assertNotNull(variableNames.get(node.getName()));
return changeNode(context, node.transform(builder -> builder.name(newName)));
}
@Override
public TraversalControl visitVariableReference(VariableReference node, TraverserContext<Node> context) {
String newName = assertNotNull(variableNames.get(node.getName()));
return changeNode(context, node.transform(builder -> builder.name(newName)));
}
@Override
public TraversalControl visitFragmentDefinition(FragmentDefinition node, TraverserContext<Node> context) {
String newName = assertNotNull(nodeToNewName.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(nodeToNewName.get(node));
return changeNode(context, node.transform(builder -> builder.name(newName)));
}
@Override
public TraversalControl visitArgument(Argument node, TraverserContext<Node> context) {
String newName = assertNotNull(nodeToNewName.get(node));
return changeNode(context, node.transform(builder -> builder.name(newName)));
}
});
return AstPrinter.printAstCompact(newDocument);
}
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();
}
}
}
}
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