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graphql.schema.diff.SchemaDiff Maven / Gradle / Ivy
package graphql.schema.diff;
import graphql.PublicSpi;
import graphql.introspection.IntrospectionResultToSchema;
import graphql.language.Argument;
import graphql.language.Directive;
import graphql.language.DirectivesContainer;
import graphql.language.Document;
import graphql.language.EnumTypeDefinition;
import graphql.language.EnumValueDefinition;
import graphql.language.FieldDefinition;
import graphql.language.InputObjectTypeDefinition;
import graphql.language.InputValueDefinition;
import graphql.language.InterfaceTypeDefinition;
import graphql.language.ObjectTypeDefinition;
import graphql.language.OperationTypeDefinition;
import graphql.language.ScalarTypeDefinition;
import graphql.language.SchemaDefinition;
import graphql.language.Type;
import graphql.language.TypeDefinition;
import graphql.language.TypeKind;
import graphql.language.TypeName;
import graphql.language.UnionTypeDefinition;
import graphql.language.Value;
import graphql.schema.diff.reporting.DifferenceReporter;
import graphql.schema.idl.TypeInfo;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.TreeMap;
import java.util.function.Function;
import java.util.stream.Collectors;
import static graphql.language.TypeKind.getTypeKind;
import static graphql.schema.idl.TypeInfo.getAstDesc;
import static graphql.schema.idl.TypeInfo.typeInfo;
/**
* The SchemaDiff is called with a {@link DiffSet} and will report the
* differences in the graphql schema APIs by raising events to a
* {@link graphql.schema.diff.reporting.DifferenceReporter}
*/
@SuppressWarnings("ConstantConditions")
@PublicSpi
public class SchemaDiff {
/**
* Options for controlling the diffing process
*/
public static class Options {
final boolean enforceDirectives;
Options(boolean enforceDirectives) {
this.enforceDirectives = enforceDirectives;
}
public Options enforceDirectives() {
return new Options(true);
}
public static Options defaultOptions() {
return new Options(false);
}
}
private static class CountingReporter implements DifferenceReporter {
final DifferenceReporter delegate;
int breakingCount = 0;
private CountingReporter(DifferenceReporter delegate) {
this.delegate = delegate;
}
@Override
public void report(DiffEvent differenceEvent) {
if (differenceEvent.getLevel().equals(DiffLevel.BREAKING)) {
breakingCount++;
}
delegate.report(differenceEvent);
}
@Override
public void onEnd() {
delegate.onEnd();
}
}
private final Options options;
/**
* Constructs a differ using default options
*/
public SchemaDiff() {
this(Options.defaultOptions());
}
/**
* Constructs a differ with the specified options
*
* @param options the controlling options
*/
public SchemaDiff(Options options) {
this.options = options;
}
/**
* This will perform a difference on the two schemas. The reporter callback
* interface will be called when differences are encountered.
*
* @param diffSet the two schemas to compare for difference
* @param reporter the place to report difference events to
*
* @return the number of API breaking changes
*/
@SuppressWarnings("unchecked")
public int diffSchema(DiffSet diffSet, DifferenceReporter reporter) {
CountingReporter countingReporter = new CountingReporter(reporter);
diffSchemaImpl(diffSet, countingReporter);
return countingReporter.breakingCount;
}
private void diffSchemaImpl(DiffSet diffSet, DifferenceReporter reporter) {
Map oldApi = diffSet.getOld();
Map newApi = diffSet.getNew();
Document oldDoc = new IntrospectionResultToSchema().createSchemaDefinition(oldApi);
Document newDoc = new IntrospectionResultToSchema().createSchemaDefinition(newApi);
DiffCtx ctx = new DiffCtx(reporter, oldDoc, newDoc);
Optional oldSchemaDef = getSchemaDef(oldDoc);
Optional newSchemaDef = getSchemaDef(newDoc);
// check query operation
checkOperation(ctx, "query", oldSchemaDef, newSchemaDef);
checkOperation(ctx, "mutation", oldSchemaDef, newSchemaDef);
checkOperation(ctx, "subscription", oldSchemaDef, newSchemaDef);
reporter.onEnd();
}
private void checkOperation(DiffCtx ctx, String opName, Optional oldSchemaDef, Optional newSchemaDef) {
// if schema declaration is missing then it is assumed to contain Query / Mutation / Subscription
Optional oldOpTypeDef;
oldOpTypeDef = oldSchemaDef
.map(schemaDefinition -> getOpDef(opName, schemaDefinition))
.orElseGet(() -> synthOperationTypeDefinition(type -> ctx.getOldTypeDef(type, ObjectTypeDefinition.class), opName));
Optional newOpTypeDef;
newOpTypeDef = newSchemaDef
.map(schemaDefinition -> getOpDef(opName, schemaDefinition))
.orElseGet(() -> synthOperationTypeDefinition(type -> ctx.getNewTypeDef(type, ObjectTypeDefinition.class), opName));
// must be new
if (!oldOpTypeDef.isPresent()) {
return;
}
ctx.report(DiffEvent.apiInfo()
.typeName(capitalize(opName))
.typeKind(TypeKind.Operation)
.components(opName)
.reasonMsg("Examining operation '%s' ...", capitalize(opName))
.build());
if (oldOpTypeDef.isPresent() && !newOpTypeDef.isPresent()) {
ctx.report(DiffEvent.apiBreakage()
.category(DiffCategory.MISSING)
.typeName(capitalize(opName))
.typeKind(TypeKind.Operation)
.components(opName)
.reasonMsg("The new API no longer has the operation '%s'", opName)
.build());
return;
}
OperationTypeDefinition oldOpTypeDefinition = oldOpTypeDef.get();
OperationTypeDefinition newOpTypeDefinition = newOpTypeDef.get();
Type oldType = oldOpTypeDefinition.getTypeName();
//
// if we have no old op, then it must have been added (which is ok)
Optional oldTD = ctx.getOldTypeDef(oldType, TypeDefinition.class);
if (!oldTD.isPresent()) {
return;
}
checkType(ctx, oldType, newOpTypeDefinition.getTypeName());
}
private void checkType(DiffCtx ctx, Type oldType, Type newType) {
String typeName = getTypeName(oldType);
// prevent circular references
if (ctx.examiningType(typeName)) {
return;
}
if (isSystemScalar(typeName)) {
return;
}
if (isReservedType(typeName)) {
return;
}
Optional oldTD = ctx.getOldTypeDef(oldType, TypeDefinition.class);
Optional newTD = ctx.getNewTypeDef(newType, TypeDefinition.class);
if (!oldTD.isPresent()) {
ctx.report(DiffEvent.apiInfo()
.typeName(typeName)
.reasonMsg("Type '%s' is missing", typeName)
.build());
return;
}
TypeDefinition oldDef = oldTD.get();
ctx.report(DiffEvent.apiInfo()
.typeName(typeName)
.typeKind(getTypeKind(oldDef))
.reasonMsg("Examining type '%s' ...", typeName)
.build());
if (!newTD.isPresent()) {
ctx.report(DiffEvent.apiBreakage()
.category(DiffCategory.MISSING)
.typeName(typeName)
.typeKind(getTypeKind(oldDef))
.reasonMsg("The new API does not have a type called '%s'", typeName)
.build());
ctx.exitType();
return;
}
TypeDefinition newDef = newTD.get();
if (!oldDef.getClass().equals(newDef.getClass())) {
ctx.report(DiffEvent.apiBreakage()
.category(DiffCategory.INVALID)
.typeName(typeName)
.typeKind(getTypeKind(oldDef))
.components(getTypeKind(oldDef), getTypeKind(newDef))
.reasonMsg("The new API has changed '%s' from a '%s' to a '%s'", typeName, getTypeKind(oldDef), getTypeKind(newDef))
.build());
ctx.exitType();
return;
}
if (oldDef instanceof ObjectTypeDefinition) {
checkObjectType(ctx, (ObjectTypeDefinition) oldDef, (ObjectTypeDefinition) newDef);
}
if (oldDef instanceof InterfaceTypeDefinition) {
checkInterfaceType(ctx, (InterfaceTypeDefinition) oldDef, (InterfaceTypeDefinition) newDef);
}
if (oldDef instanceof UnionTypeDefinition) {
checkUnionType(ctx, (UnionTypeDefinition) oldDef, (UnionTypeDefinition) newDef);
}
if (oldDef instanceof InputObjectTypeDefinition) {
checkInputObjectType(ctx, (InputObjectTypeDefinition) oldDef, (InputObjectTypeDefinition) newDef);
}
if (oldDef instanceof EnumTypeDefinition) {
checkEnumType(ctx, (EnumTypeDefinition) oldDef, (EnumTypeDefinition) newDef);
}
if (oldDef instanceof ScalarTypeDefinition) {
checkScalarType(ctx, (ScalarTypeDefinition) oldDef, (ScalarTypeDefinition) newDef);
}
ctx.exitType();
}
private boolean isDeprecated(DirectivesContainer node) {
return node.hasDirective("deprecated");
}
private boolean isReservedType(String typeName) {
return typeName.startsWith("__");
}
private final static Set SYSTEM_SCALARS = new LinkedHashSet<>();
static {
SYSTEM_SCALARS.add("ID");
SYSTEM_SCALARS.add("Boolean");
SYSTEM_SCALARS.add("String");
SYSTEM_SCALARS.add("Byte");
SYSTEM_SCALARS.add("Char");
SYSTEM_SCALARS.add("Short");
SYSTEM_SCALARS.add("Int");
SYSTEM_SCALARS.add("Long");
SYSTEM_SCALARS.add("Float");
SYSTEM_SCALARS.add("Double");
SYSTEM_SCALARS.add("BigInteger");
SYSTEM_SCALARS.add("BigDecimal");
}
private boolean isSystemScalar(String typeName) {
return SYSTEM_SCALARS.contains(typeName);
}
private void checkObjectType(DiffCtx ctx, ObjectTypeDefinition oldDef, ObjectTypeDefinition newDef) {
Map oldFields = sortedMap(oldDef.getFieldDefinitions(), FieldDefinition::getName);
Map newFields = sortedMap(newDef.getFieldDefinitions(), FieldDefinition::getName);
checkFields(ctx, oldDef, oldFields, newDef, newFields);
checkImplements(ctx, oldDef, oldDef.getImplements(), newDef.getImplements());
checkDirectives(ctx, oldDef, newDef);
}
private void checkInterfaceType(DiffCtx ctx, InterfaceTypeDefinition oldDef, InterfaceTypeDefinition newDef) {
Map oldFields = sortedMap(oldDef.getFieldDefinitions(), FieldDefinition::getName);
Map newFields = sortedMap(newDef.getFieldDefinitions(), FieldDefinition::getName);
checkFields(ctx, oldDef, oldFields, newDef, newFields);
checkDirectives(ctx, oldDef, newDef);
}
private void checkUnionType(DiffCtx ctx, UnionTypeDefinition oldDef, UnionTypeDefinition newDef) {
Map oldMemberTypes = sortedMap(oldDef.getMemberTypes(), SchemaDiff::getTypeName);
Map newMemberTypes = sortedMap(newDef.getMemberTypes(), SchemaDiff::getTypeName);
for (Map.Entry entry : oldMemberTypes.entrySet()) {
String oldMemberTypeName = entry.getKey();
if (!newMemberTypes.containsKey(oldMemberTypeName)) {
ctx.report(DiffEvent.apiBreakage()
.category(DiffCategory.MISSING)
.typeName(oldDef.getName())
.typeKind(getTypeKind(oldDef))
.components(oldMemberTypeName)
.reasonMsg("The new API does not contain union member type '%s'", oldMemberTypeName)
.build());
} else {
// check type which is in the old and the new Union def
checkType(ctx, entry.getValue(), newMemberTypes.get(oldMemberTypeName));
}
}
for (Map.Entry entry : newMemberTypes.entrySet()) {
String newMemberTypeName = entry.getKey();
if (!oldMemberTypes.containsKey(newMemberTypeName)) {
ctx.report(DiffEvent.apiDanger()
.category(DiffCategory.ADDITION)
.typeName(oldDef.getName())
.typeKind(getTypeKind(oldDef))
.components(newMemberTypeName)
.reasonMsg("The new API has added a new union member type '%s'", newMemberTypeName)
.build());
}
}
checkDirectives(ctx, oldDef, newDef);
}
private void checkInputObjectType(DiffCtx ctx, InputObjectTypeDefinition oldDef, InputObjectTypeDefinition newDef) {
checkInputFields(ctx, oldDef, oldDef.getInputValueDefinitions(), newDef.getInputValueDefinitions());
checkDirectives(ctx, oldDef, newDef);
}
private void checkInputFields(DiffCtx ctx, TypeDefinition old, List oldIVD, List newIVD) {
Map oldDefinitionMap = sortedMap(oldIVD, InputValueDefinition::getName);
Map newDefinitionMap = sortedMap(newIVD, InputValueDefinition::getName);
for (String inputFieldName : oldDefinitionMap.keySet()) {
InputValueDefinition oldField = oldDefinitionMap.get(inputFieldName);
Optional newField = Optional.ofNullable(newDefinitionMap.get(inputFieldName));
ctx.report(DiffEvent.apiInfo()
.typeName(old.getName())
.typeKind(getTypeKind(old))
.fieldName(oldField.getName())
.reasonMsg("\tExamining input field '%s' ...", mkDotName(old.getName(), oldField.getName()))
.build());
if (!newField.isPresent()) {
DiffCategory category;
String message;
if (isDeprecated(oldField)) {
category = DiffCategory.DEPRECATION_REMOVED;
message = "The new API has removed a deprecated field '%s'";
} else {
category = DiffCategory.MISSING;
message = "The new API is missing an input field '%s'";
}
ctx.report(DiffEvent.apiBreakage()
.category(category)
.typeName(old.getName())
.typeKind(getTypeKind(old))
.fieldName(oldField.getName())
.reasonMsg(message, mkDotName(old.getName(), oldField.getName()))
.build());
} else {
DiffCategory category = checkTypeWithNonNullAndListOnInputOrArg(oldField.getType(), newField.get().getType());
if (category != null) {
ctx.report(DiffEvent.apiBreakage()
.category(category)
.typeName(old.getName())
.typeKind(getTypeKind(old))
.fieldName(oldField.getName())
.components(getAstDesc(oldField.getType()), getAstDesc(newField.get().getType()))
.reasonMsg("The new API has changed input field '%s' from type '%s' to '%s'",
oldField.getName(), getAstDesc(oldField.getType()), getAstDesc(newField.get().getType()))
.build());
}
//
// recurse via input types
//
checkType(ctx, oldField.getType(), newField.get().getType());
}
}
// check new fields are not mandatory
for (String inputFieldName : newDefinitionMap.keySet()) {
InputValueDefinition newField = newDefinitionMap.get(inputFieldName);
Optional oldField = Optional.ofNullable(oldDefinitionMap.get(inputFieldName));
if (!oldField.isPresent()) {
// new fields MUST not be mandatory
if (typeInfo(newField.getType()).isNonNull()) {
ctx.report(DiffEvent.apiBreakage()
.category(DiffCategory.STRICTER)
.typeName(old.getName())
.typeKind(getTypeKind(old))
.fieldName(newField.getName())
.reasonMsg("The new API has made the new input field '%s' non null and hence more strict for old consumers", newField.getName())
.build());
}
}
}
}
private void checkEnumType(DiffCtx ctx, EnumTypeDefinition oldDef, EnumTypeDefinition newDef) {
Map oldDefinitionMap = sortedMap(oldDef.getEnumValueDefinitions(), EnumValueDefinition::getName);
Map newDefinitionMap = sortedMap(newDef.getEnumValueDefinitions(), EnumValueDefinition::getName);
for (String enumName : oldDefinitionMap.keySet()) {
EnumValueDefinition oldEnum = oldDefinitionMap.get(enumName);
Optional newEnum = Optional.ofNullable(newDefinitionMap.get(enumName));
if (!newEnum.isPresent()) {
DiffCategory category;
String message;
if (isDeprecated(oldEnum)) {
category = DiffCategory.DEPRECATION_REMOVED;
message = "The new API has removed a deprecated enum value '%s'";
} else {
category = DiffCategory.MISSING;
message = "The new API is missing an enum value '%s'";
}
ctx.report(DiffEvent.apiBreakage()
.category(category)
.typeName(oldDef.getName())
.typeKind(getTypeKind(oldDef))
.components(oldEnum.getName())
.reasonMsg(message, oldEnum.getName())
.build());
} else {
checkDirectives(ctx, oldDef, oldEnum.getDirectives(), newEnum.get().getDirectives());
}
}
for (String enumName : newDefinitionMap.keySet()) {
EnumValueDefinition oldEnum = oldDefinitionMap.get(enumName);
if (oldEnum == null) {
ctx.report(DiffEvent.apiDanger()
.category(DiffCategory.ADDITION)
.typeName(oldDef.getName())
.typeKind(getTypeKind(oldDef))
.components(enumName)
.reasonMsg("The new API has added a new enum value '%s'", enumName)
.build());
} else if (isDeprecated(newDefinitionMap.get(enumName)) && !isDeprecated(oldEnum)) {
ctx.report(DiffEvent.apiDanger()
.category(DiffCategory.DEPRECATION_ADDED)
.typeName(oldDef.getName())
.typeKind(getTypeKind(oldDef))
.components(enumName)
.reasonMsg("The new API has deprecated an enum value '%s'", enumName)
.build());
}
}
checkDirectives(ctx, oldDef, newDef);
}
private void checkScalarType(DiffCtx ctx, ScalarTypeDefinition oldDef, ScalarTypeDefinition newDef) {
checkDirectives(ctx, oldDef, newDef);
}
private void checkImplements(DiffCtx ctx, ObjectTypeDefinition old, List oldImplements, List newImplements) {
Map oldImplementsMap = sortedMap(oldImplements, t -> ((TypeName) t).getName());
Map newImplementsMap = sortedMap(newImplements, t -> ((TypeName) t).getName());
for (Map.Entry entry : oldImplementsMap.entrySet()) {
Optional oldInterface = ctx.getOldTypeDef(entry.getValue(), InterfaceTypeDefinition.class);
if (!oldInterface.isPresent()) {
continue;
}
Optional newInterface = ctx.getNewTypeDef(newImplementsMap.get(entry.getKey()), InterfaceTypeDefinition.class);
if (!newInterface.isPresent()) {
ctx.report(DiffEvent.apiBreakage()
.category(DiffCategory.MISSING)
.typeName(old.getName())
.typeKind(getTypeKind(old))
.components(oldInterface.get().getName())
.reasonMsg("The new API is missing the interface named '%s'", oldInterface.get().getName())
.build());
} else {
checkInterfaceType(ctx, oldInterface.get(), newInterface.get());
}
}
}
private void checkFields(
DiffCtx ctx,
TypeDefinition oldDef,
Map oldFields,
TypeDefinition newDef,
Map newFields) {
checkFieldRemovals(ctx, oldDef, oldFields, newFields);
checkFieldAdditions(ctx, newDef, oldFields, newFields);
}
private void checkFieldRemovals(
DiffCtx ctx,
TypeDefinition oldDef,
Map oldFields,
Map newFields) {
for (Map.Entry entry : oldFields.entrySet()) {
String fieldName = entry.getKey();
ctx.report(DiffEvent.apiInfo()
.typeName(oldDef.getName())
.typeKind(getTypeKind(oldDef))
.fieldName(fieldName)
.reasonMsg("\tExamining field '%s' ...", mkDotName(oldDef.getName(), fieldName))
.build());
FieldDefinition newField = newFields.get(fieldName);
if (newField == null) {
DiffCategory category;
String message;
if (isDeprecated(entry.getValue())) {
category = DiffCategory.DEPRECATION_REMOVED;
message = "The new API has removed a deprecated field '%s'";
} else {
category = DiffCategory.MISSING;
message = "The new API is missing the field '%s'";
}
ctx.report(DiffEvent.apiBreakage()
.category(category)
.typeName(oldDef.getName())
.typeKind(getTypeKind(oldDef))
.fieldName(fieldName)
.reasonMsg(message, mkDotName(oldDef.getName(), fieldName))
.build());
} else {
checkField(ctx, oldDef, entry.getValue(), newField);
}
}
}
private void checkFieldAdditions(
DiffCtx ctx,
TypeDefinition newDef,
Map oldFields,
Map newFields) {
for (Map.Entry entry : newFields.entrySet()) {
String fieldName = entry.getKey();
ctx.report(DiffEvent.apiInfo()
.typeName(newDef.getName())
.typeKind(getTypeKind(newDef))
.fieldName(fieldName)
.reasonMsg("\tExamining field '%s' ...", mkDotName(newDef.getName(), fieldName))
.build());
FieldDefinition oldField = oldFields.get(fieldName);
if (oldField == null) {
ctx.report(DiffEvent.apiInfo()
.category(DiffCategory.ADDITION)
.typeName(newDef.getName())
.typeKind(getTypeKind(newDef))
.fieldName(fieldName)
.reasonMsg("The new API adds the field '%s'", mkDotName(newDef.getName(), fieldName))
.build());
} else if (!isDeprecated(oldField) && isDeprecated(entry.getValue())) {
ctx.report(DiffEvent.apiDanger()
.category(DiffCategory.DEPRECATION_ADDED)
.typeName(newDef.getName())
.typeKind(getTypeKind(newDef))
.fieldName(fieldName)
.reasonMsg("The new API deprecated a field '%s'", mkDotName(newDef.getName(), fieldName))
.build());
}
}
}
private void checkField(DiffCtx ctx, TypeDefinition old, FieldDefinition oldField, FieldDefinition newField) {
Type oldFieldType = oldField.getType();
Type newFieldType = newField.getType();
DiffCategory category = checkTypeWithNonNullAndListOnObjectOrInterface(oldFieldType, newFieldType);
if (category != null) {
ctx.report(DiffEvent.apiBreakage()
.category(category)
.typeName(old.getName())
.typeKind(getTypeKind(old))
.fieldName(oldField.getName())
.components(getAstDesc(oldFieldType), getAstDesc(newFieldType))
.reasonMsg("The new API has changed field '%s' from type '%s' to '%s'", mkDotName(old.getName(), oldField.getName()), getAstDesc(oldFieldType), getAstDesc(newFieldType))
.build());
}
checkFieldArguments(ctx, old, oldField, oldField.getInputValueDefinitions(), newField.getInputValueDefinitions());
checkDirectives(ctx, old, oldField.getDirectives(), newField.getDirectives());
//
// and down we go again recursively via fields
//
checkType(ctx, oldFieldType, newFieldType);
}
private void checkFieldArguments(DiffCtx ctx, TypeDefinition oldDef, FieldDefinition oldField, List oldInputValueDefinitions, List newInputValueDefinitions) {
Map oldArgsMap = sortedMap(oldInputValueDefinitions, InputValueDefinition::getName);
Map newArgMap = sortedMap(newInputValueDefinitions, InputValueDefinition::getName);
if (oldArgsMap.size() > newArgMap.size()) {
ctx.report(DiffEvent.apiBreakage()
.category(DiffCategory.MISSING)
.typeName(oldDef.getName())
.typeKind(getTypeKind(oldDef))
.fieldName(oldField.getName())
.reasonMsg("The new API has less arguments on field '%s' of type '%s' than the old API", mkDotName(oldDef.getName(), oldField.getName()), oldDef.getName())
.build());
return;
}
for (Map.Entry entry : oldArgsMap.entrySet()) {
String argName = entry.getKey();
ctx.report(DiffEvent.apiInfo()
.typeName(oldDef.getName())
.typeKind(getTypeKind(oldDef))
.fieldName(oldField.getName())
.reasonMsg("\tExamining field argument '%s' ...", mkDotName(oldDef.getName(), oldField.getName(), argName))
.build());
InputValueDefinition newArg = newArgMap.get(argName);
if (newArg == null) {
ctx.report(DiffEvent.apiBreakage()
.category(DiffCategory.MISSING)
.typeName(oldDef.getName())
.typeKind(getTypeKind(oldDef))
.fieldName(oldField.getName())
.components(argName)
.reasonMsg("The new API is missing the field argument '%s'", mkDotName(oldDef.getName(), oldField.getName(), argName))
.build());
} else {
checkFieldArg(ctx, oldDef, oldField, entry.getValue(), newArg);
}
}
// check new fields are not mandatory
for (Map.Entry entry : newArgMap.entrySet()) {
InputValueDefinition newArg = entry.getValue();
Optional oldArg = Optional.ofNullable(oldArgsMap.get(newArg.getName()));
if (!oldArg.isPresent()) {
// new args MUST not be mandatory
if (typeInfo(newArg.getType()).isNonNull()) {
ctx.report(DiffEvent.apiBreakage()
.category(DiffCategory.STRICTER)
.typeName(oldDef.getName())
.typeKind(getTypeKind(oldDef))
.fieldName(oldField.getName())
.components(newArg.getName())
.reasonMsg("The new API has made the new argument '%s' on field '%s' non null and hence more strict for old consumers", newArg.getName(), mkDotName(oldDef.getName(), oldField.getName()))
.build());
}
}
}
}
private void checkFieldArg(DiffCtx ctx, TypeDefinition oldDef, FieldDefinition oldField, InputValueDefinition oldArg, InputValueDefinition newArg) {
Type oldArgType = oldArg.getType();
Type newArgType = newArg.getType();
DiffCategory category = checkTypeWithNonNullAndListOnInputOrArg(oldArgType, newArgType);
if (category != null) {
ctx.report(DiffEvent.apiBreakage()
.category(category)
.typeName(oldDef.getName())
.typeKind(getTypeKind(oldDef))
.fieldName(oldField.getName())
.components(getAstDesc(oldArgType), getAstDesc(newArgType))
.reasonMsg("The new API has changed field '%s' argument '%s' from type '%s' to '%s'", mkDotName(oldDef.getName(), oldField.getName()), oldArg.getName(), getAstDesc(oldArgType), getAstDesc(newArgType))
.build());
} else {
//
// and down we go again recursively via arg types
//
checkType(ctx, oldArgType, newArgType);
}
boolean changedDefaultValue = false;
Value oldValue = oldArg.getDefaultValue();
Value newValue = newArg.getDefaultValue();
if (oldValue != null && newValue != null) {
if (!oldValue.getClass().equals(newValue.getClass())) {
ctx.report(DiffEvent.apiBreakage()
.category(DiffCategory.INVALID)
.typeName(oldDef.getName())
.typeKind(getTypeKind(oldDef))
.fieldName(oldField.getName())
.components(oldArg.getName())
.reasonMsg("The new API has changed default value types on argument named '%s' on field '%s' of type '%s", oldArg.getName(), mkDotName(oldDef.getName(), oldField.getName()), oldDef.getName())
.build());
}
if (!oldValue.isEqualTo(newValue)) {
changedDefaultValue = true;
}
}
if (oldValue == null && newValue != null) {
changedDefaultValue = true;
}
if (oldValue != null && newValue == null) {
changedDefaultValue = true;
}
if (changedDefaultValue) {
ctx.report(DiffEvent.apiDanger()
.category(DiffCategory.DIFFERENT)
.typeName(oldDef.getName())
.typeKind(getTypeKind(oldDef))
.fieldName(oldField.getName())
.components(oldArg.getName())
.reasonMsg("The new API has changed default value on argument named '%s' on field '%s' of type '%s", oldArg.getName(), mkDotName(oldDef.getName(), oldField.getName()), oldDef.getName())
.build());
}
checkDirectives(ctx, oldDef, oldArg.getDirectives(), newArg.getDirectives());
}
private void checkDirectives(DiffCtx ctx, TypeDefinition oldDef, TypeDefinition newDef) {
List oldDirectives = oldDef.getDirectives();
List newDirectives = newDef.getDirectives();
checkDirectives(ctx, oldDef, oldDirectives, newDirectives);
}
void checkDirectives(DiffCtx ctx, TypeDefinition old, List oldDirectives, List newDirectives) {
if (!options.enforceDirectives) {
return;
}
Map oldDirectivesMap = sortedMap(oldDirectives, Directive::getName);
Map newDirectivesMap = sortedMap(newDirectives, Directive::getName);
for (String directiveName : oldDirectivesMap.keySet()) {
Directive oldDirective = oldDirectivesMap.get(directiveName);
Optional newDirective = Optional.ofNullable(newDirectivesMap.get(directiveName));
if (!newDirective.isPresent()) {
ctx.report(DiffEvent.apiBreakage()
.category(DiffCategory.MISSING)
.typeName(old.getName())
.typeKind(getTypeKind(old))
.components(directiveName)
.reasonMsg("The new API does not have a directive named '%s' on type '%s'", directiveName, old.getName())
.build());
continue;
}
Map oldArgumentsByName = new TreeMap<>(oldDirective.getArgumentsByName());
Map newArgumentsByName = new TreeMap<>(newDirective.get().getArgumentsByName());
if (oldArgumentsByName.size() > newArgumentsByName.size()) {
ctx.report(DiffEvent.apiBreakage()
.category(DiffCategory.MISSING)
.typeName(old.getName())
.typeKind(getTypeKind(old))
.components(directiveName)
.reasonMsg("The new API has less arguments on directive '%s' on type '%s' than the old API", directiveName, old.getName())
.build());
return;
}
for (String argName : oldArgumentsByName.keySet()) {
Argument oldArgument = oldArgumentsByName.get(argName);
Optional newArgument = Optional.ofNullable(newArgumentsByName.get(argName));
if (!newArgument.isPresent()) {
ctx.report(DiffEvent.apiBreakage()
.category(DiffCategory.MISSING)
.typeName(old.getName())
.typeKind(getTypeKind(old))
.components(directiveName, argName)
.reasonMsg("The new API does not have an argument named '%s' on directive '%s' on type '%s'", argName, directiveName, old.getName())
.build());
} else {
Value oldValue = oldArgument.getValue();
Value newValue = newArgument.get().getValue();
if (oldValue != null && newValue != null) {
if (!oldValue.getClass().equals(newValue.getClass())) {
ctx.report(DiffEvent.apiBreakage()
.category(DiffCategory.INVALID)
.typeName(old.getName())
.typeKind(getTypeKind(old))
.components(directiveName, argName)
.reasonMsg("The new API has changed value types on argument named '%s' on directive '%s' on type '%s'", argName, directiveName, old.getName())
.build());
}
}
}
}
}
}
DiffCategory checkTypeWithNonNullAndListOnInputOrArg(Type oldType, Type newType) {
TypeInfo oldTypeInfo = typeInfo(oldType);
TypeInfo newTypeInfo = typeInfo(newType);
if (!oldTypeInfo.getName().equals(newTypeInfo.getName())) {
return DiffCategory.INVALID;
}
while (true) {
if (oldTypeInfo.isNonNull()) {
if (newTypeInfo.isNonNull()) {
// if they're both non-null, compare the unwrapped types
oldTypeInfo = oldTypeInfo.unwrapOne();
newTypeInfo = newTypeInfo.unwrapOne();
} else {
// non-null to nullable is valid, as long as the underlying types are also valid
oldTypeInfo = oldTypeInfo.unwrapOne();
}
} else if (oldTypeInfo.isList()) {
if (newTypeInfo.isList()) {
// if they're both lists, compare the unwrapped types
oldTypeInfo = oldTypeInfo.unwrapOne();
newTypeInfo = newTypeInfo.unwrapOne();
} else if (newTypeInfo.isNonNull()) {
// nullable to non-null creates a stricter input requirement for clients to specify
return DiffCategory.STRICTER;
} else {
// list to non-list is not valid
return DiffCategory.INVALID;
}
} else {
if (newTypeInfo.isNonNull()) {
// nullable to non-null creates a stricter input requirement for clients to specify
return DiffCategory.STRICTER;
} else if (newTypeInfo.isList()) {
// non-list to list is not valid
return DiffCategory.INVALID;
} else {
return null;
}
}
}
}
DiffCategory checkTypeWithNonNullAndListOnObjectOrInterface(Type oldType, Type newType) {
TypeInfo oldTypeInfo = typeInfo(oldType);
TypeInfo newTypeInfo = typeInfo(newType);
if (!oldTypeInfo.getName().equals(newTypeInfo.getName())) {
return DiffCategory.INVALID;
}
while (true) {
if (oldTypeInfo.isNonNull()) {
if (newTypeInfo.isNonNull()) {
// if they're both non-null, compare the unwrapped types
oldTypeInfo = oldTypeInfo.unwrapOne();
newTypeInfo = newTypeInfo.unwrapOne();
} else {
// non-null to nullable requires a stricter check from clients since it removes the guarantee of presence
return DiffCategory.STRICTER;
}
} else if (oldTypeInfo.isList()) {
if (newTypeInfo.isList()) {
// if they're both lists, compare the unwrapped types
oldTypeInfo = oldTypeInfo.unwrapOne();
newTypeInfo = newTypeInfo.unwrapOne();
} else if (newTypeInfo.isNonNull()) {
// nullable to non-null is valid, as long as the underlying types are also valid
newTypeInfo = newTypeInfo.unwrapOne();
} else {
// list to non-list is not valid
return DiffCategory.INVALID;
}
} else {
if (newTypeInfo.isNonNull()) {
// nullable to non-null is valid, as long as the underlying types are also valid
newTypeInfo = newTypeInfo.unwrapOne();
} else if (newTypeInfo.isList()) {
// non-list to list is not valid
return DiffCategory.INVALID;
} else {
return null;
}
}
}
}
static String getTypeName(Type type) {
if (type == null) {
return null;
}
return typeInfo(type).getName();
}
@SuppressWarnings("ConstantConditions")
private Optional getSchemaDef(Document document) {
return document.getDefinitions().stream()
.filter(d -> d instanceof SchemaDefinition)
.map(SchemaDefinition.class::cast)
.findFirst();
}
private Optional getOpDef(String opName, SchemaDefinition schemaDef) {
return schemaDef.getOperationTypeDefinitions()
.stream()
.filter(otd -> otd.getName().equals(opName))
.findFirst();
}
// looks for a type called `Query|Mutation|Subscription` and if it exist then assumes it as an operation def
private Optional synthOperationTypeDefinition(Function> typeRetriever, String opName) {
TypeName type = TypeName.newTypeName().name(capitalize(opName)).build();
Optional typeDef = typeRetriever.apply(type);
return typeDef.map(objectTypeDefinition -> OperationTypeDefinition.newOperationTypeDefinition().name(opName).typeName(type).build());
}
private Map sortedMap(List listOfNamedThings, Function nameFunc) {
Map map = listOfNamedThings.stream().collect(Collectors.toMap(nameFunc, Function.identity(), (x, y) -> y));
return new TreeMap<>(map);
}
private static String capitalize(String name) {
if (name != null && name.length() != 0) {
char[] chars = name.toCharArray();
chars[0] = Character.toUpperCase(chars[0]);
return new String(chars);
} else {
return name;
}
}
private String mkDotName(String... objectNames) {
return String.join(".", objectNames);
}
}
