org.openapitools.codegen.languages.ScalaSttp4ClientCodegen Maven / Gradle / Ivy
package org.openapitools.codegen.languages;
import io.swagger.v3.oas.models.Operation;
import io.swagger.v3.oas.models.media.Schema;
import io.swagger.v3.oas.models.security.SecurityScheme;
import io.swagger.v3.oas.models.servers.Server;
import org.apache.commons.lang3.StringUtils;
import org.openapitools.codegen.*;
import org.openapitools.codegen.meta.GeneratorMetadata;
import org.openapitools.codegen.meta.Stability;
import org.openapitools.codegen.meta.features.*;
import org.openapitools.codegen.model.ModelMap;
import org.openapitools.codegen.model.ModelsMap;
import org.openapitools.codegen.model.OperationMap;
import org.openapitools.codegen.model.OperationsMap;
import org.openapitools.codegen.utils.ModelUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class ScalaSttp4ClientCodegen extends AbstractScalaCodegen implements CodegenConfig {
private static final StringProperty STTP_CLIENT_VERSION = new StringProperty("sttpClientVersion", "The version of " +
"sttp client", "4.0.0-M1");
private static final BooleanProperty USE_SEPARATE_ERROR_CHANNEL = new BooleanProperty("separateErrorChannel",
"Whether to return response as " +
"F[Either[ResponseError[ErrorType], ReturnType]]] or to flatten " +
"response's error raising them through enclosing monad (F[ReturnType]).", true);
private static final StringProperty JODA_TIME_VERSION = new StringProperty("jodaTimeVersion", "The version of " +
"joda-time library", "2.10.13");
private static final StringProperty JSON4S_VERSION = new StringProperty("json4sVersion", "The version of json4s " +
"library", "4.0.6");
private static final JsonLibraryProperty JSON_LIBRARY_PROPERTY = new JsonLibraryProperty();
public static final String DEFAULT_PACKAGE_NAME = "org.openapitools.client";
private static final PackageProperty PACKAGE_PROPERTY = new PackageProperty();
private static final List> properties = Arrays.asList(
STTP_CLIENT_VERSION, USE_SEPARATE_ERROR_CHANNEL, JODA_TIME_VERSION,
JSON4S_VERSION, JSON_LIBRARY_PROPERTY, PACKAGE_PROPERTY);
private final Logger LOGGER = LoggerFactory.getLogger(ScalaSttp4ClientCodegen.class);
protected String groupId = "org.openapitools";
protected String artifactId = "openapi-client";
protected String artifactVersion = "1.0.0";
protected boolean registerNonStandardStatusCodes = true;
protected boolean renderJavadoc = true;
protected boolean removeOAuthSecurities = true;
Map enumRefs = new HashMap<>();
public ScalaSttp4ClientCodegen() {
super();
generatorMetadata = GeneratorMetadata.newBuilder(generatorMetadata)
.stability(Stability.BETA)
.build();
modifyFeatureSet(features -> features
.includeDocumentationFeatures(DocumentationFeature.Readme)
.wireFormatFeatures(EnumSet.of(WireFormatFeature.JSON, WireFormatFeature.XML, WireFormatFeature.Custom))
.securityFeatures(EnumSet.of(
SecurityFeature.BasicAuth,
SecurityFeature.ApiKey,
SecurityFeature.BearerToken
))
.excludeGlobalFeatures(
GlobalFeature.XMLStructureDefinitions,
GlobalFeature.Callbacks,
GlobalFeature.LinkObjects,
GlobalFeature.ParameterStyling
)
.excludeSchemaSupportFeatures(
SchemaSupportFeature.Polymorphism
)
.excludeParameterFeatures(
ParameterFeature.Cookie
)
.includeClientModificationFeatures(
ClientModificationFeature.BasePath,
ClientModificationFeature.UserAgent
)
);
outputFolder = "generated-code/scala-sttp4";
modelTemplateFiles.put("model.mustache", ".scala");
apiTemplateFiles.put("api.mustache", ".scala");
embeddedTemplateDir = templateDir = "scala-sttp4";
String jsonLibrary = JSON_LIBRARY_PROPERTY.getValue(additionalProperties);
String jsonValueClass = "circe".equals(jsonLibrary) ? "io.circe.Json" : "org.json4s.JValue";
additionalProperties.put(CodegenConstants.GROUP_ID, groupId);
additionalProperties.put(CodegenConstants.ARTIFACT_ID, artifactId);
additionalProperties.put(CodegenConstants.ARTIFACT_VERSION, artifactVersion);
if (renderJavadoc) {
additionalProperties.put("javadocRenderer", new JavadocLambda());
}
additionalProperties.put("fnCapitalize", new CapitalizeLambda());
additionalProperties.put("fnCamelize", new CamelizeLambda(false));
additionalProperties.put("fnEnumEntry", new EnumEntryLambda());
// importMapping.remove("Seq");
// importMapping.remove("List");
// importMapping.remove("Set");
// importMapping.remove("Map");
// TODO: there is no specific sttp mapping. All Scala Type mappings should be in AbstractScala
typeMapping = new HashMap<>();
typeMapping.put("array", "Seq");
typeMapping.put("set", "Set");
typeMapping.put("boolean", "Boolean");
typeMapping.put("string", "String");
typeMapping.put("int", "Int");
typeMapping.put("integer", "Int");
typeMapping.put("long", "Long");
typeMapping.put("float", "Float");
typeMapping.put("byte", "Byte");
typeMapping.put("short", "Short");
typeMapping.put("char", "Char");
typeMapping.put("double", "Double");
typeMapping.put("object", "Any");
typeMapping.put("file", "File");
typeMapping.put("binary", "File");
typeMapping.put("number", "Double");
typeMapping.put("decimal", "BigDecimal");
typeMapping.put("ByteArray", "Array[Byte]");
typeMapping.put("AnyType", jsonValueClass);
instantiationTypes.put("array", "ListBuffer");
instantiationTypes.put("map", "Map");
properties.stream()
.map(Property::toCliOptions)
.flatMap(Collection::stream)
.forEach(option -> cliOptions.add(option));
}
@Override
public void processOpts() {
super.processOpts();
properties.forEach(p -> p.updateAdditionalProperties(additionalProperties));
invokerPackage = PACKAGE_PROPERTY.getInvokerPackage(additionalProperties);
apiPackage = PACKAGE_PROPERTY.getApiPackage(additionalProperties);
modelPackage = PACKAGE_PROPERTY.getModelPackage(additionalProperties);
supportingFiles.add(new SupportingFile("README.mustache", "", "README.md"));
supportingFiles.add(new SupportingFile("build.sbt.mustache", "", "build.sbt"));
final String invokerFolder = (sourceFolder + File.separator + invokerPackage).replace(".", File.separator);
supportingFiles.add(new SupportingFile("jsonSupport.mustache", invokerFolder, "JsonSupport.scala"));
supportingFiles.add(new SupportingFile("additionalTypeSerializers.mustache", invokerFolder, "AdditionalTypeSerializers.scala"));
supportingFiles.add(new SupportingFile("project/build.properties.mustache", "project", "build.properties"));
supportingFiles.add(new SupportingFile("dateSerializers.mustache", invokerFolder, "DateSerializers.scala"));
}
@Override
public String getName() {
return "scala-sttp4";
}
@Override
public String getHelp() {
return "Generates a Scala client library (beta) based on Sttp4.";
}
@Override
public String encodePath(String input) {
String path = super.encodePath(input);
// The parameter names in the URI must be converted to the same case as
// the method parameter.
StringBuffer buf = new StringBuffer(path.length());
Matcher matcher = Pattern.compile("[{](.*?)[}]").matcher(path);
while (matcher.find()) {
matcher.appendReplacement(buf, "\\${" + toParamName(matcher.group(0)) + "}");
}
matcher.appendTail(buf);
return buf.toString();
}
@Override
public CodegenOperation fromOperation(String path,
String httpMethod,
Operation operation,
List servers) {
CodegenOperation op = super.fromOperation(path, httpMethod, operation, servers);
op.path = encodePath(path);
return op;
}
@Override
public CodegenType getTag() {
return CodegenType.CLIENT;
}
@Override
public String escapeReservedWord(String name) {
if (this.reservedWordsMappings().containsKey(name)) {
return this.reservedWordsMappings().get(name);
}
return "`" + name + "`";
}
@Override
public ModelsMap postProcessModels(ModelsMap objs) {
return objs;
}
/**
* Invoked by {@link DefaultGenerator} after all models have been post-processed,
* allowing for a last pass of codegen-specific model cleanup.
*
* @param objs Current state of codegen object model.
* @return An in-place modified state of the codegen object model.
*/
@Override
public Map postProcessAllModels(Map objs) {
final Map processed = super.postProcessAllModels(objs);
postProcessUpdateImports(processed);
return processed;
}
/**
* Update/clean up model imports
*
* append '._" if the import is a Enum class, otherwise
* remove model imports to avoid warnings for importing class in the same package in Scala
*
* @param models processed models to be further processed
*/
@SuppressWarnings("unchecked")
private void postProcessUpdateImports(final Map models) {
final String prefix = modelPackage() + ".";
enumRefs = getEnumRefs(models);
for (String openAPIName : models.keySet()) {
CodegenModel model = ModelUtils.getModelByName(openAPIName, models);
if (model == null) {
LOGGER.warn("Expected to retrieve model {} by name, but no model was found. Check your -Dmodels inclusions.", openAPIName);
continue;
}
ModelsMap objs = models.get(openAPIName);
List> imports = objs.getImports();
if (imports == null || imports.isEmpty()) {
continue;
}
List> newImports = new ArrayList<>();
Iterator> iterator = imports.iterator();
while (iterator.hasNext()) {
String importPath = iterator.next().get("import");
Map item = new HashMap<>();
if (importPath.startsWith(prefix)) {
if (isEnumClass(importPath, enumRefs)) {
item.put("import", importPath.concat("._"));
newImports.add(item);
}
} else {
item.put("import", importPath);
newImports.add(item);
}
}
// reset imports
objs.setImports(newImports);
}
}
private Map getEnumRefs(final Map models) {
Map enums = new HashMap<>();
for (String key : models.keySet()) {
CodegenModel model = ModelUtils.getModelByName(key, models);
if (model.isEnum) {
ModelsMap objs = models.get(key);
enums.put(key, objs);
}
}
return enums;
}
private boolean isEnumClass(final String importPath, final Map enumModels) {
if (enumModels == null || enumModels.isEmpty()) {
return false;
}
for (ModelsMap objs : enumModels.values()) {
List models = objs.getModels();
if (models == null || models.isEmpty()) {
continue;
}
for (final Map model : models) {
String enumImportPath = (String) model.get("importPath");
if (enumImportPath != null && enumImportPath.equals(importPath)) {
return true;
}
}
}
return false;
}
@Override
public OperationsMap postProcessOperationsWithModels(OperationsMap objs, List allModels) {
if (registerNonStandardStatusCodes) {
try {
OperationMap opsMap = objs.getOperations();
HashSet unknownCodes = new HashSet<>();
for (CodegenOperation operation : opsMap.getOperation()) {
for (CodegenResponse response : operation.responses) {
if ("default".equals(response.code)) {
continue;
}
try {
int code = Integer.parseInt(response.code);
if (code >= 600) {
unknownCodes.add(code);
}
} catch (NumberFormatException e) {
LOGGER.error("Status code is not an integer : response.code", e);
}
}
}
if (!unknownCodes.isEmpty()) {
additionalProperties.put("unknownStatusCodes", unknownCodes);
}
} catch (Exception e) {
LOGGER.error("Unable to find operations List", e);
}
}
// update imports for enum class
List> newImports = new ArrayList<>();
List> imports = objs.getImports();
if (imports != null && !imports.isEmpty()) {
Iterator> iterator = imports.iterator();
while (iterator.hasNext()) {
String importPath = iterator.next().get("import");
Map item = new HashMap<>();
if (isEnumClass(importPath, enumRefs)) {
item.put("import", importPath.concat("._"));
} else {
item.put("import", importPath);
}
newImports.add(item);
}
}
objs.setImports(newImports);
return super.postProcessOperationsWithModels(objs, allModels);
}
@Override
public List fromSecurity(Map schemes) {
final List codegenSecurities = super.fromSecurity(schemes);
if (!removeOAuthSecurities) {
return codegenSecurities;
}
// Remove OAuth securities
codegenSecurities.removeIf(security -> security.isOAuth);
if (codegenSecurities.isEmpty()) {
return null;
}
return codegenSecurities;
}
@Override
public String toParamName(String name) {
// obtain the name from parameterNameMapping directly if provided
if (parameterNameMapping.containsKey(name)) {
return parameterNameMapping.get(name);
}
return formatIdentifier(name, false);
}
@Override
public String toEnumName(CodegenProperty property) {
return formatIdentifier(property.baseName, true);
}
@Override
public String toDefaultValue(Schema p) {
if (p.getRequired() != null && p.getRequired().contains(p.getName())) {
return "None";
}
if (ModelUtils.isBooleanSchema(p)) {
return null;
} else if (ModelUtils.isDateSchema(p)) {
return null;
} else if (ModelUtils.isDateTimeSchema(p)) {
return null;
} else if (ModelUtils.isNumberSchema(p)) {
return null;
} else if (ModelUtils.isIntegerSchema(p)) {
return null;
} else if (ModelUtils.isMapSchema(p)) {
String inner = getSchemaType(ModelUtils.getAdditionalProperties(p));
return "Map[String, " + inner + "].empty ";
} else if (ModelUtils.isArraySchema(p)) {
String inner = getSchemaType(ModelUtils.getSchemaItems(p));
if (ModelUtils.isSet(p)) {
return "Set[" + inner + "].empty ";
}
return "Seq[" + inner + "].empty ";
} else if (ModelUtils.isStringSchema(p)) {
return null;
} else {
return null;
}
}
/**
* Update datatypeWithEnum for array container
*
* @param property Codegen property
*/
@Override
protected void updateDataTypeWithEnumForArray(CodegenProperty property) {
CodegenProperty baseItem = property.items;
while (baseItem != null && (Boolean.TRUE.equals(baseItem.isMap)
|| Boolean.TRUE.equals(baseItem.isArray))) {
baseItem = baseItem.items;
}
if (baseItem != null) {
// set datetypeWithEnum as only the inner type is enum
property.datatypeWithEnum = toEnumName(baseItem);
// naming the enum with respect to the language enum naming convention
// e.g. remove [], {} from array/map of enum
property.enumName = toEnumName(property);
property._enum = baseItem._enum;
updateCodegenPropertyEnum(property);
}
}
public static abstract class Property {
final String name;
final String description;
final T defaultValue;
public Property(String name, String description, T defaultValue) {
this.name = name;
this.description = description;
this.defaultValue = defaultValue;
}
public abstract List toCliOptions();
public abstract void updateAdditionalProperties(Map additionalProperties);
public abstract T getValue(Map additionalProperties);
public void setValue(Map additionalProperties, T value) {
additionalProperties.put(name, value);
}
}
public static class StringProperty extends Property {
public StringProperty(String name, String description, String defaultValue) {
super(name, description, defaultValue);
}
@Override
public List toCliOptions() {
return Collections.singletonList(CliOption.newString(name, description).defaultValue(defaultValue));
}
@Override
public void updateAdditionalProperties(Map additionalProperties) {
if (!additionalProperties.containsKey(name)) {
additionalProperties.put(name, defaultValue);
}
}
@Override
public String getValue(Map additionalProperties) {
return additionalProperties.getOrDefault(name, defaultValue).toString();
}
}
public static class BooleanProperty extends Property {
public BooleanProperty(String name, String description, Boolean defaultValue) {
super(name, description, defaultValue);
}
@Override
public List toCliOptions() {
return Collections.singletonList(CliOption.newBoolean(name, description, defaultValue));
}
@Override
public void updateAdditionalProperties(Map additionalProperties) {
Boolean value = getValue(additionalProperties);
additionalProperties.put(name, value);
}
@Override
public Boolean getValue(Map additionalProperties) {
return Boolean.valueOf(additionalProperties.getOrDefault(name, defaultValue.toString()).toString());
}
}
public static class JsonLibraryProperty extends StringProperty {
private static final String JSON4S = "json4s";
private static final String CIRCE = "circe";
public JsonLibraryProperty() {
super("jsonLibrary", "Json library to use. Possible values are: json4s and circe.", JSON4S);
}
@Override
public void updateAdditionalProperties(Map additionalProperties) {
String value = getValue(additionalProperties);
if (CIRCE.equals(value) || JSON4S.equals(value)) {
additionalProperties.put(CIRCE, CIRCE.equals(value));
additionalProperties.put(JSON4S, JSON4S.equals(value));
} else {
IllegalArgumentException exception =
new IllegalArgumentException("Invalid json library: " + value + ". Must be " + CIRCE + " " +
"or " + JSON4S);
throw exception;
}
}
}
public static class PackageProperty extends StringProperty {
public PackageProperty() {
super("mainPackage", "Top-level package name, which defines 'apiPackage', 'modelPackage', " +
"'invokerPackage'", DEFAULT_PACKAGE_NAME);
}
@Override
public void updateAdditionalProperties(Map additionalProperties) {
String mainPackage = getValue(additionalProperties);
if (!additionalProperties.containsKey(CodegenConstants.API_PACKAGE)) {
String apiPackage = mainPackage + ".api";
additionalProperties.put(CodegenConstants.API_PACKAGE, apiPackage);
}
if (!additionalProperties.containsKey(CodegenConstants.MODEL_PACKAGE)) {
String modelPackage = mainPackage + ".model";
additionalProperties.put(CodegenConstants.MODEL_PACKAGE, modelPackage);
}
if (!additionalProperties.containsKey(CodegenConstants.INVOKER_PACKAGE)) {
String invokerPackage = mainPackage + ".core";
additionalProperties.put(CodegenConstants.INVOKER_PACKAGE, invokerPackage);
}
}
public String getApiPackage(Map additionalProperties) {
return additionalProperties.getOrDefault(CodegenConstants.API_PACKAGE, DEFAULT_PACKAGE_NAME + ".api").toString();
}
public String getModelPackage(Map additionalProperties) {
return additionalProperties.getOrDefault(CodegenConstants.MODEL_PACKAGE, DEFAULT_PACKAGE_NAME + ".model").toString();
}
public String getInvokerPackage(Map additionalProperties) {
return additionalProperties.getOrDefault(CodegenConstants.INVOKER_PACKAGE, DEFAULT_PACKAGE_NAME + ".core").toString();
}
}
private static class JavadocLambda extends CustomLambda {
@Override
public String formatFragment(String fragment) {
final String[] lines = fragment.split("\\r?\\n");
final StringBuilder sb = new StringBuilder();
sb.append(" /**\n");
for (String line : lines) {
sb.append(" * ").append(line).append("\n");
}
sb.append(" */\n");
return sb.toString();
}
}
private static class CapitalizeLambda extends CustomLambda {
@Override
public String formatFragment(String fragment) {
return StringUtils.capitalize(fragment);
}
}
private class EnumEntryLambda extends CustomLambda {
@Override
public String formatFragment(String fragment) {
return formatIdentifier(fragment, true);
}
}
}