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org.openapitools.codegen.languages.ProtobufSchemaCodegen Maven / Gradle / Ivy
/*
* Copyright 2019 OpenAPI-Generator Contributors (https://openapi-generator.tech)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.openapitools.codegen.languages;
import io.swagger.v3.oas.models.media.ArraySchema;
import io.swagger.v3.oas.models.media.Schema;
import org.openapitools.codegen.*;
import org.openapitools.codegen.exceptions.ProtoBufIndexComputationException;
import org.openapitools.codegen.meta.GeneratorMetadata;
import org.openapitools.codegen.meta.Stability;
import org.openapitools.codegen.meta.features.DocumentationFeature;
import org.openapitools.codegen.meta.features.SecurityFeature;
import org.openapitools.codegen.meta.features.WireFormatFeature;
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.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.util.*;
import java.util.Map.Entry;
import java.util.regex.Pattern;
import static org.openapitools.codegen.utils.StringUtils.*;
public class ProtobufSchemaCodegen extends DefaultCodegen implements CodegenConfig {
private static final String IMPORT = "import";
private static final String IMPORTS = "imports";
public static final String NUMBERED_FIELD_NUMBER_LIST = "numberedFieldNumberList";
public static final String START_ENUMS_WITH_UNKNOWN = "startEnumsWithUnknown";
private final Logger LOGGER = LoggerFactory.getLogger(ProtobufSchemaCodegen.class);
protected String packageName = "openapitools";
private boolean numberedFieldNumberList = false;
private boolean startEnumsWithUnknown = false;
@Override
public CodegenType getTag() {
return CodegenType.SCHEMA;
}
public String getName() {
return "protobuf-schema";
}
public String getHelp() {
return "Generates gRPC and protocol buffer schema files (beta)";
}
public ProtobufSchemaCodegen() {
super();
generatorMetadata = GeneratorMetadata.newBuilder(generatorMetadata)
.stability(Stability.BETA)
.build();
modifyFeatureSet(features -> features
.includeDocumentationFeatures(DocumentationFeature.Readme)
.includeWireFormatFeatures(WireFormatFeature.PROTOBUF)
.wireFormatFeatures(EnumSet.of(WireFormatFeature.PROTOBUF))
.securityFeatures(EnumSet.noneOf(SecurityFeature.class))
);
outputFolder = "generated-code/protobuf-schema";
modelTemplateFiles.put("model.mustache", ".proto");
apiTemplateFiles.put("api.mustache", ".proto");
embeddedTemplateDir = templateDir = "protobuf-schema";
hideGenerationTimestamp = Boolean.TRUE;
modelPackage = "models";
apiPackage = "services";
defaultIncludes = new HashSet<>(
Arrays.asList(
"map",
"set",
"array")
);
languageSpecificPrimitives = new HashSet<>(
Arrays.asList(
"map",
"set",
"array",
"bool",
"bytes",
"string",
"int32",
"int64",
"uint32",
"uint64",
"sint32",
"sint64",
"fixed32",
"fixed64",
"sfixed32",
"sfixed64",
"float",
"double")
);
instantiationTypes.clear();
instantiationTypes.put("array", "repeat");
instantiationTypes.put("set", "repeat");
// ref: https://developers.google.com/protocol-buffers/docs/proto
typeMapping.clear();
typeMapping.put("set", "array");
typeMapping.put("array", "array");
typeMapping.put("map", "map");
typeMapping.put("integer", "int32");
typeMapping.put("long", "int64");
typeMapping.put("number", "float");
typeMapping.put("float", "float");
typeMapping.put("double", "double");
typeMapping.put("boolean", "bool");
typeMapping.put("string", "string");
typeMapping.put("UUID", "string");
typeMapping.put("URI", "string");
typeMapping.put("date", "string");
typeMapping.put("DateTime", "string");
typeMapping.put("password", "string");
// TODO fix file mapping
typeMapping.put("file", "string");
typeMapping.put("binary", "string");
typeMapping.put("ByteArray", "bytes");
typeMapping.put("object", "TODO_OBJECT_MAPPING");
importMapping.clear();
modelDocTemplateFiles.put("model_doc.mustache", ".md");
apiDocTemplateFiles.put("api_doc.mustache", ".md");
cliOptions.clear();
addSwitch(NUMBERED_FIELD_NUMBER_LIST, "Field numbers in order.", numberedFieldNumberList);
addSwitch(START_ENUMS_WITH_UNKNOWN, "Introduces \"UNKNOWN\" as the first element of enumerations.", startEnumsWithUnknown);
}
@Override
public void processOpts() {
super.processOpts();
//apiTestTemplateFiles.put("api_test.mustache", ".proto");
//modelTestTemplateFiles.put("model_test.mustache", ".proto");
apiDocTemplateFiles.clear(); // TODO: add api doc template
modelDocTemplateFiles.clear(); // TODO: add model doc template
if (additionalProperties.containsKey(CodegenConstants.PACKAGE_NAME)) {
setPackageName((String) additionalProperties.get(CodegenConstants.PACKAGE_NAME));
} else {
additionalProperties.put(CodegenConstants.PACKAGE_NAME, packageName);
}
if (!additionalProperties.containsKey(CodegenConstants.API_PACKAGE)) {
additionalProperties.put(CodegenConstants.API_PACKAGE, apiPackage);
}
if (!additionalProperties.containsKey(CodegenConstants.MODEL_PACKAGE)) {
additionalProperties.put(CodegenConstants.MODEL_PACKAGE, modelPackage);
}
if (additionalProperties.containsKey(this.NUMBERED_FIELD_NUMBER_LIST)) {
this.numberedFieldNumberList = convertPropertyToBooleanAndWriteBack(NUMBERED_FIELD_NUMBER_LIST);
}
if (additionalProperties.containsKey(this.START_ENUMS_WITH_UNKNOWN)) {
this.startEnumsWithUnknown = convertPropertyToBooleanAndWriteBack(START_ENUMS_WITH_UNKNOWN);
}
supportingFiles.add(new SupportingFile("README.mustache", "", "README.md"));
}
@Override
public String toOperationId(String operationId) {
// throw exception if method name is empty (should not occur as an auto-generated method name will be used)
if (StringUtils.isEmpty(operationId)) {
throw new RuntimeException("Empty method name (operationId) not allowed");
}
// method name cannot use reserved keyword, e.g. return
if (isReservedWord(operationId)) {
LOGGER.warn("{} (reserved word) cannot be used as method name. Renamed to {}", operationId, camelize(sanitizeName("call_" + operationId)));
operationId = "call_" + operationId;
}
return camelize(sanitizeName(operationId));
}
/**
* Adds prefix to the enum allowable values
* NOTE: Enum values use C++ scoping rules, meaning that enum values are siblings of their type, not children of it. Therefore, enum value must be unique
*
* @param allowableValues allowable values
* @param prefix added prefix
*/
public void addEnumValuesPrefix(Map allowableValues, String prefix) {
if (allowableValues.containsKey("enumVars")) {
List> enumVars = (List>) allowableValues.get("enumVars");
for (Map value : enumVars) {
String name = (String) value.get("name");
value.put("name", prefix + "_" + name);
value.put("value", "\"" + prefix + "_" + name + "\"");
}
}
if (allowableValues.containsKey("values")) {
List values = (List) allowableValues.get("values");
for (Object value : values) {
value = prefix + "_" + String.valueOf(value);
}
}
}
/**
* Adds unknown value to the enum allowable values
*
* @param allowableValues allowable values
*/
public void addUnknownToAllowableValues(Map allowableValues) {
if (startEnumsWithUnknown) {
if (allowableValues.containsKey("enumVars")) {
List> enumVars = (List>) allowableValues.get("enumVars");
HashMap unknown = new HashMap();
unknown.put("name", "UNKNOWN");
unknown.put("isString", "false");
unknown.put("value", "\"UNKNOWN\"");
enumVars.add(0, unknown);
}
if (allowableValues.containsKey("values")) {
List values = (List) allowableValues.get("values");
values.add(0, "UNKNOWN");
}
}
}
/**
* Iterates enum vars and puts index to them
*
* @param enumVars list of enum vars
*/
public void addEnumIndexes(List> enumVars) {
int enumIndex = 0;
for (Map enumVar : enumVars) {
enumVar.put("protobuf-enum-index", enumIndex);
enumIndex++;
}
}
@Override
public ModelsMap postProcessModels(ModelsMap objs) {
objs = postProcessModelsEnum(objs);
for (ModelMap mo : objs.getModels()) {
CodegenModel cm = mo.getModel();
if (cm.isEnum) {
Map allowableValues = cm.getAllowableValues();
addUnknownToAllowableValues(allowableValues);
addEnumValuesPrefix(allowableValues, cm.getClassname());
if (allowableValues.containsKey("enumVars")) {
List> enumVars = (List>) allowableValues.get("enumVars");
addEnumIndexes(enumVars);
}
}
int index = 1;
for (CodegenProperty var : cm.vars) {
// add x-protobuf-type: repeated if it's an array
if (Boolean.TRUE.equals(var.isArray)) {
var.vendorExtensions.put("x-protobuf-type", "repeated");
} else if (Boolean.TRUE.equals(var.isNullable && var.isPrimitiveType)) {
var.vendorExtensions.put("x-protobuf-type", "optional");
}
// add x-protobuf-data-type
// ref: https://developers.google.com/protocol-buffers/docs/proto3
if (!var.vendorExtensions.containsKey("x-protobuf-data-type")) {
if (var.isArray) {
var.vendorExtensions.put("x-protobuf-data-type", var.items.dataType);
} else {
var.vendorExtensions.put("x-protobuf-data-type", var.dataType);
}
}
if (var.isEnum) {
addUnknownToAllowableValues(var.allowableValues);
addEnumValuesPrefix(var.allowableValues, var.getEnumName());
if (var.allowableValues.containsKey("enumVars")) {
List> enumVars = (List>) var.allowableValues.get("enumVars");
addEnumIndexes(enumVars);
}
}
// Add x-protobuf-index, unless already specified
if (this.numberedFieldNumberList) {
var.vendorExtensions.putIfAbsent("x-protobuf-index", index);
index++;
} else {
try {
var.vendorExtensions.putIfAbsent("x-protobuf-index", generateFieldNumberFromString(var.getName()));
} catch (ProtoBufIndexComputationException e) {
LOGGER.error("Exception when assigning a index to a protobuf field", e);
var.vendorExtensions.putIfAbsent("x-protobuf-index", "Generated field number is in reserved range (19000, 19999)");
}
}
}
}
return objs;
}
/**
* {@inheritDoc}
*/
@Override
public Map postProcessAllModels(Map objs) {
super.postProcessAllModels(objs);
Map allModels = this.getAllModels(objs);
for (CodegenModel cm : allModels.values()) {
// Replicate all attributes from children to parents in case of allof, as there is no inheritance
if (!cm.allOf.isEmpty() && cm.getParentModel() != null) {
CodegenModel parentCM = cm.getParentModel();
for (CodegenProperty var : cm.getVars()) {
if (!parentVarsContainsVar(parentCM.vars, var)) {
parentCM.vars.add(var);
}
}
// add all imports from child
cm.getImports().stream()
// Filter self import && child import
.filter(importFromList -> !parentCM.getClassname().equalsIgnoreCase(importFromList) && !cm.getClassname().equalsIgnoreCase(importFromList))
.forEach(importFromList -> this.addImport(objs, parentCM, importFromList));
}
}
return objs;
}
public void addImport(Map objs, CodegenModel cm, String importValue) {
String modelFileName = this.toModelFilename(importValue);
boolean skipImport = isImportAlreadyPresentInModel(objs, cm, modelFileName);
if (!skipImport) {
this.addImport(cm, importValue);
Map importItem = new HashMap<>();
importItem.put(IMPORT, modelFileName);
objs.get(cm.getName()).getImports().add(importItem);
}
}
private boolean isImportAlreadyPresentInModel(Map objs, CodegenModel cm, String importValue) {
boolean skipImport = false;
List> cmImports = objs.get(cm.getName()).getImports();
for (Map cmImportItem : cmImports) {
for (Entry cmImportItemEntry : cmImportItem.entrySet()) {
if (importValue.equals(cmImportItemEntry.getValue())) {
skipImport = true;
break;
}
}
}
return skipImport;
}
@Override
public String escapeUnsafeCharacters(String input) {
return input;
}
@Override
public String escapeQuotationMark(String input) {
return input;
}
/**
* Return the default value of the property
*
* @param p OpenAPI property object
* @return string presentation of the default value of the property
*/
@Override
public String toDefaultValue(Schema p) {
if (ModelUtils.isBooleanSchema(p)) {
if (p.getDefault() != null) {
if (Boolean.valueOf(p.getDefault().toString()) == false)
return "false";
else
return "true";
}
} else if (ModelUtils.isDateSchema(p)) {
// TODO
} else if (ModelUtils.isDateTimeSchema(p)) {
// TODO
} else if (ModelUtils.isNumberSchema(p)) {
if (p.getDefault() != null) {
return p.getDefault().toString();
}
} else if (ModelUtils.isIntegerSchema(p)) {
if (p.getDefault() != null) {
return p.getDefault().toString();
}
} else if (ModelUtils.isStringSchema(p)) {
if (p.getDefault() != null) {
if (Pattern.compile("\r\n|\r|\n").matcher(String.valueOf(p.getDefault())).find())
return "'''" + p.getDefault() + "'''";
else
return "'" + p.getDefault() + "'";
}
} else if (ModelUtils.isArraySchema(p)) {
if (p.getDefault() != null) {
return p.getDefault().toString();
}
}
return null;
}
@Override
public String apiFileFolder() {
return outputFolder + File.separatorChar + apiPackage;
}
@Override
public String modelFileFolder() {
return outputFolder + File.separatorChar + modelPackage;
}
@Override
public String toApiFilename(String name) {
// replace - with _ e.g. created-at => created_at
name = name.replaceAll("-", "_");
// e.g. PhoneNumber => phone_number
return underscore(name) + "_service";
}
@Override
public String toApiName(String name) {
if (name.length() == 0) {
return "DefaultService";
}
// e.g. phone_number => PhoneNumber
return camelize(name) + "Service";
}
@Override
public String toApiVarName(String name) {
if (name.length() == 0) {
return "default_service";
}
return underscore(name) + "_service";
}
public void setPackageName(String packageName) {
this.packageName = packageName;
}
@Override
public String toModelFilename(String name) {
// underscore the model file name
// PhoneNumber => phone_number
return underscore(toModelName(name));
}
@Override
public String toVarName(final String name) {
return name;
}
@Override
public String toModelName(String name) {
name = sanitizeName(name); // FIXME: a parameter should not be assigned. Also declare the methods parameters as 'final'.
// remove dollar sign
name = name.replace("$", "");
// model name cannot use reserved keyword, e.g. return
if (isReservedWord(name)) {
LOGGER.warn("{} (reserved word) cannot be used as model name. Renamed to {}", name, camelize("model_" + name));
name = "model_" + name; // e.g. return => ModelReturn (after camelize)
}
// model name starts with number
if (name.matches("^\\d.*")) {
LOGGER.warn("{} (model name starts with number) cannot be used as model name. Renamed to {}", name,
camelize("model_" + name));
name = "model_" + name; // e.g. 200Response => Model200Response (after camelize)
}
if (!StringUtils.isEmpty(modelNamePrefix)) {
name = modelNamePrefix + "_" + name;
}
if (!StringUtils.isEmpty(modelNameSuffix)) {
name = name + "_" + modelNameSuffix;
}
// camelize the model name
// phone_number => PhoneNumber
return camelize(name);
}
@Override
public String getSchemaType(Schema p) {
String schemaType = super.getSchemaType(p);
String type = null;
if (typeMapping.containsKey(schemaType)) {
type = typeMapping.get(schemaType);
if (languageSpecificPrimitives.contains(type)) {
return type;
}
} else {
type = toModelName(schemaType);
}
return type;
}
@Override
public OperationsMap postProcessOperationsWithModels(OperationsMap objs, List allModels) {
OperationMap operations = objs.getOperations();
List operationList = operations.getOperation();
for (CodegenOperation op : operationList) {
int index = 1;
for (CodegenParameter p : op.allParams) {
// add x-protobuf-type: repeated if it's an array
if (Boolean.TRUE.equals(p.isArray)) {
p.vendorExtensions.put("x-protobuf-type", "repeated");
} else if (Boolean.TRUE.equals(p.isNullable && p.isPrimitiveType)) {
p.vendorExtensions.put("x-protobuf-type", "optional");
} else if (Boolean.TRUE.equals(p.isMap)) {
LOGGER.warn("Map parameter (name: {}, operation ID: {}) not yet supported", p.paramName, op.operationId);
}
// add x-protobuf-data-type
// ref: https://developers.google.com/protocol-buffers/docs/proto3
if (!p.vendorExtensions.containsKey("x-protobuf-data-type")) {
if (Boolean.TRUE.equals(p.isArray)) {
p.vendorExtensions.put("x-protobuf-data-type", p.items.dataType);
} else {
p.vendorExtensions.put("x-protobuf-data-type", p.dataType);
}
}
p.vendorExtensions.putIfAbsent("x-protobuf-index", index);
index++;
}
if (StringUtils.isEmpty(op.returnType)) {
op.vendorExtensions.put("x-grpc-response", "google.protobuf.Empty");
} else {
if (Boolean.FALSE.equals(op.returnTypeIsPrimitive) && StringUtils.isEmpty(op.returnContainer)) {
op.vendorExtensions.put("x-grpc-response", op.returnType);
} else {
if ("map".equals(op.returnContainer)) {
LOGGER.warn("Map response (operation ID: {}) not yet supported", op.operationId);
op.vendorExtensions.put("x-grpc-response-type", op.returnBaseType);
} else if ("array".equals(op.returnContainer)) {
op.vendorExtensions.put("x-grpc-response-type", "repeated " + op.returnBaseType);
} else { // primitive type
op.vendorExtensions.put("x-grpc-response-type", op.returnBaseType);
}
}
}
}
return objs;
}
@Override
public String toModelImport(String name) {
return underscore(name);
}
@Override
public String getTypeDeclaration(Schema p) {
if (ModelUtils.isArraySchema(p)) {
ArraySchema ap = (ArraySchema) p;
Schema inner = ap.getItems();
return getSchemaType(p) + "[" + getTypeDeclaration(inner) + "]";
} else if (ModelUtils.isMapSchema(p)) {
Schema inner = ModelUtils.getAdditionalProperties(p);
return getSchemaType(p) + "";
}
return super.getTypeDeclaration(p);
}
private int generateFieldNumberFromString(String name) throws ProtoBufIndexComputationException {
// Max value from developers.google.com/protocol-buffers/docs/proto3#assigning_field_numbers
int fieldNumber = Math.abs(name.hashCode() % 536870911);
if (19000 <= fieldNumber && fieldNumber <= 19999) {
LOGGER.error("Generated field number is in reserved range (19000, 19999) for %s, %d", name, fieldNumber);
throw new ProtoBufIndexComputationException("Generated field number is in reserved range (19000, 19999).");
}
return fieldNumber;
}
/**
* Checks if the var provided is already in the list of the parent's vars, matching the type and the name
*
* @param parentVars list of parent's vars
* @param var var to compare
* @return true if the var is already in the parent's list, false otherwise
*/
private boolean parentVarsContainsVar(List parentVars, CodegenProperty var) {
boolean containsVar = false;
for (CodegenProperty parentVar : parentVars) {
if (var.getDataType().equals(parentVar.getDataType())
&& var.getName().equals(parentVar.getName())) {
containsVar = true;
break;
}
}
return containsVar;
}
@Override
public GeneratorLanguage generatorLanguage() {
return GeneratorLanguage.PROTOBUF;
}
}
