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io.swagger.codegen.v3.generators.scala.AkkaHttpServerCodegen Maven / Gradle / Ivy
package io.swagger.codegen.v3.generators.scala;
import io.swagger.codegen.v3.*;
import io.swagger.v3.oas.models.OpenAPI;
import io.swagger.v3.oas.models.Operation;
import io.swagger.v3.oas.models.media.Schema;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.util.*;
public class AkkaHttpServerCodegen extends AbstractScalaCodegen {
private static final Logger LOGGER = LoggerFactory.getLogger(AkkaHttpServerCodegen.class);
protected String groupId = "io.swagger";
protected String artifactId = "swagger-scala-akka-http-server";
protected String artifactVersion = "1.0.0";
protected String invokerPackage = "io.swagger.server";
@Override
public CodegenType getTag() {
return CodegenType.SERVER;
}
@Override
public String getName() {
return "scala-akka-http-server";
}
@Override
public String getHelp() {
return "Generates an akka http server in scala";
}
public AkkaHttpServerCodegen() {
super();
//GENERAL PROPERTIES
additionalProperties.put(CodegenConstants.GROUP_ID, groupId);
additionalProperties.put(CodegenConstants.ARTIFACT_ID, artifactId);
additionalProperties.put(CodegenConstants.ARTIFACT_VERSION, artifactVersion);
additionalProperties.put(CodegenConstants.INVOKER_PACKAGE, invokerPackage);
apiPackage = "io.swagger.server.api";
modelPackage = "io.swagger.server.model";
apiTemplateFiles.put("api.mustache", ".scala");
modelTemplateFiles.put("model.mustache", ".scala");
supportingFiles.add(new SupportingFile("build.sbt.mustache", "", "build.sbt"));
supportingFiles.add(new SupportingFile("controller.mustache",
(sourceFolder + File.separator + invokerPackage).replace(".", java.io.File.separator), "Controller.scala"));
supportingFiles.add(new SupportingFile("helper.mustache",
(sourceFolder + File.separator + invokerPackage).replace(".", java.io.File.separator), "AkkaHttpHelper.scala"));
}
@Override
public Map postProcessOperations(Map objs) {
return setComplexTypes(objs);
}
public static Map setComplexTypes(Map objs) {
Map operations = (Map) objs.get("operations");
List operationList = (List) operations.get("operation");
Boolean hasComplexTypes = Boolean.FALSE;
Boolean hasCookieParams = Boolean.FALSE;
Set complexRequestTypes = new HashSet<>();
List complexReturnTypes = new ArrayList<>();
for (CodegenOperation op : operationList) {
List complexOperationReturnTypes = new ArrayList<>();
for(CodegenParameter parameter : op.allParams) {
if(!parameter.getIsPrimitiveType()){
if(parameter.getIsBodyParam()){
hasComplexTypes = Boolean.TRUE;
complexRequestTypes.add(parameter.dataType);
}
}
if(parameter.getIsCookieParam()){
hasCookieParams = Boolean.TRUE;
}
}
for(CodegenResponse response : op.responses) {
if(!response.getIsPrimitiveType()){
hasComplexTypes = Boolean.TRUE;
complexReturnTypes.add(response);
complexOperationReturnTypes.add(response);
}
}
op.getVendorExtensions().put("complexReturnTypes", complexOperationReturnTypes);
}
objs.put("hasComplexTypes", hasComplexTypes);
objs.put("hasCookieParams", hasCookieParams);
objs.put("complexRequestTypes", complexRequestTypes);
objs.put("complexReturnTypes", complexReturnTypes);
return objs;
}
@Override
public CodegenOperation fromOperation(String path, String httpMethod, Operation operation, Map schemas, OpenAPI openAPI){
CodegenOperation codegenOperation = super.fromOperation(path, httpMethod, operation, schemas, openAPI);
addLowercaseHttpMethod(codegenOperation);
addPathMatcher(codegenOperation);
addQueryParamsWithSupportedType(codegenOperation);
addAllParamsWithSupportedTypes(codegenOperation);
return codegenOperation;
}
@Override
public String getDefaultTemplateDir() {
return "scala/akka-http-server";
}
protected static String LOWERCASE_HTTP_METHOD = "lowercaseHttpMethod";
/**
* Provide a lowercase representation of the http method to map to the method directives of akka http
* @see Akka Http Documentation
*/
protected static void addLowercaseHttpMethod(CodegenOperation codegenOperation) {
codegenOperation.getVendorExtensions().put(LOWERCASE_HTTP_METHOD, codegenOperation.httpMethod.toLowerCase());
}
protected static String PATHS = "paths";
/**
* Split the path as a string to a list of strings to map to the path directives of akka http
* @see Akka Http Documentation
*/
protected static void addPathMatcher(CodegenOperation codegenOperation) {
LinkedList allPaths = new LinkedList<>(Arrays.asList(codegenOperation.path.split("/")));
allPaths.removeIf(""::equals);
LinkedList paths = replacePathsWithMatchers(allPaths, codegenOperation);
codegenOperation.getVendorExtensions().put(PATHS, paths);
}
/**
* Mapping from parameter data types in path to akka http path matcher
* @see Akka Http Documentation
*/
private static Map pathTypeToMatcher = new HashMap(){{
put("Int", "IntNumber");
put("Long", "LongNumber");
put("Float","FloatNumber"); //Custom implementation in AkkaHttpHelper object
put("Double","DoubleNumber");
//put("List[???]","???"); TODO Could be implemented with a custom path matcher
//put("Object","???"); TODO Could be implemented with a custom path matcher
put("Boolean","Boolean"); //Custom implementation in AkkaHttpHelper object
put("String", "Segment");
}};
protected static String FALLBACK_DATA_TYPE = "String";
protected static String COOKIE_DATA_TYPE = "HttpCookiePair";
private static LinkedList replacePathsWithMatchers(LinkedList paths, CodegenOperation codegenOperation) {
LinkedList result = new LinkedList<>();
for(String path: paths){
TextOrMatcher textOrMatcher = new TextOrMatcher("", true, true);
if(path.startsWith("{") && path.endsWith("}")) {
String parameterName = path.substring(1, path.length()-1);
for(CodegenParameter pathParam: codegenOperation.pathParams){
if(pathParam.paramName.equals(parameterName)) {
String matcher = pathTypeToMatcher.get(pathParam.dataType);
if(matcher == null) {
LOGGER.warn("The path parameter " + pathParam.paramName +
" with the datatype " + pathParam.dataType +
" could not be translated to a corresponding path matcher of akka http" +
" and therefore has been translated to string.");
matcher = pathTypeToMatcher.get(FALLBACK_DATA_TYPE);
}
textOrMatcher.value = matcher;
textOrMatcher.isText = false;
result.add(textOrMatcher);
}
}
} else {
textOrMatcher.value = path;
textOrMatcher.isText = true;
result.add(textOrMatcher);
}
}
result.getLast().hasMore = false;
return result;
}
/**
* Mapping from parameter data types in java to corresponding data types in java
*/
private static Set primitiveParamTypes = new HashSet(){{
addAll(Arrays.asList(
"Int",
"Long",
"Float",
"Double",
"Boolean",
"String"
));
}};
protected static String QUERY_PARAMS_WITH_SUPPORTED_TYPE = "queryParamsWithSupportedType";
/**
* Replace all not supported types of query parameters by the fallback type
*/
protected static void addQueryParamsWithSupportedType(CodegenOperation codegenOperation) {
LinkedList queryParamsWithSupportedType = new LinkedList();
for(CodegenParameter parameter: codegenOperation.queryParams) {
CodegenParameter parameterCopy = parameter.copy();
if(!primitiveParamTypes.contains(parameter.dataType)){
parameterCopy.dataType = FALLBACK_DATA_TYPE;
}
queryParamsWithSupportedType.add(parameterCopy);
}
codegenOperation.getVendorExtensions().put(QUERY_PARAMS_WITH_SUPPORTED_TYPE, queryParamsWithSupportedType);
}
protected static String PARAMS_WITH_SUPPORTED_TYPE = "paramsWithSupportedType";
public static void addAllParamsWithSupportedTypes(CodegenOperation codegenOperation) {
LinkedList allParamsWithSupportedType = new LinkedList();
for(CodegenParameter parameter: codegenOperation.allParams) {
CodegenParameter parameterCopy = parameter.copy();
if(containsParam(codegenOperation.pathParams, parameter)){
if(!pathTypeToMatcher.containsKey(parameter.dataType)){
parameterCopy.dataType = FALLBACK_DATA_TYPE;
}
} else if(containsParam(codegenOperation.queryParams, parameter)){
if(!primitiveParamTypes.contains(parameter.dataType)){
parameterCopy.dataType = FALLBACK_DATA_TYPE;
}
} else if(containsParam(codegenOperation.formParams, parameter)){
if(!primitiveParamTypes.contains(parameter.dataType)){
parameterCopy.dataType = FALLBACK_DATA_TYPE;
}
} else if(parameter.getIsCookieParam()){
parameterCopy.dataType = COOKIE_DATA_TYPE;
}
allParamsWithSupportedType.add(parameterCopy);
}
codegenOperation.getVendorExtensions().put(PARAMS_WITH_SUPPORTED_TYPE, allParamsWithSupportedType);
}
private static boolean containsParam(List parameters, CodegenParameter param) {
for(CodegenParameter elem: parameters){
if(param.paramName.equals(elem.paramName)){
return true;
}
}
return false;
}
}
class TextOrMatcher {
String value;
boolean isText;
boolean hasMore;
public TextOrMatcher(String value, boolean isText, boolean hasMore) {
this.value = value;
this.isText = isText;
this.hasMore = hasMore;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
TextOrMatcher that = (TextOrMatcher) o;
return isText == that.isText &&
hasMore == that.hasMore &&
value.equals(that.value);
}
@Override
public int hashCode() {
return Objects.hash(value, isText, hasMore);
}
}
