io.swagger.codegen.languages.kotlin.AbstractKotlinCodegen Maven / Gradle / Ivy
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package io.swagger.codegen.languages.kotlin;
import io.swagger.codegen.CodegenModel;
import io.swagger.codegen.CliOption;
import io.swagger.codegen.languages.DefaultCodegenConfig;
import io.swagger.codegen.CodegenConstants;
import io.swagger.codegen.DefaultCodegen;
import io.swagger.v3.oas.models.media.Schema;
import io.swagger.v3.oas.models.media.ArraySchema;
import io.swagger.v3.oas.models.media.MapSchema;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
public abstract class AbstractKotlinCodegen extends DefaultCodegenConfig {
private static Logger LOGGER = LoggerFactory.getLogger(AbstractKotlinCodegen.class);
private Set instantiationLibraryFunction;
protected String artifactId;
protected String artifactVersion = "1.0.0";
protected String groupId = "io.swagger";
protected String packageName;
protected String sourceFolder = "src/main/kotlin";
protected String apiDocPath = "docs/";
protected String modelDocPath = "docs/";
protected CodegenConstants.ENUM_PROPERTY_NAMING_TYPE enumPropertyNaming = CodegenConstants.ENUM_PROPERTY_NAMING_TYPE.camelCase;
public AbstractKotlinCodegen() {
super();
supportsInheritance = true;
languageSpecificPrimitives = new HashSet(Arrays.asList(
"kotlin.Any",
"kotlin.Byte",
"kotlin.Short",
"kotlin.Int",
"kotlin.Long",
"kotlin.Float",
"kotlin.Double",
"kotlin.Boolean",
"kotlin.Char",
"kotlin.String",
"kotlin.Array",
"kotlin.collections.List",
"kotlin.collections.Map",
"kotlin.collections.Set"
));
// this includes hard reserved words defined by https://github.com/JetBrains/kotlin/blob/master/core/descriptors/src/org/jetbrains/kotlin/renderer/KeywordStringsGenerated.java
// as well as keywords from https://kotlinlang.org/docs/reference/keyword-reference.html
reservedWords = new HashSet(Arrays.asList(
"abstract",
"annotation",
"as",
"break",
"case",
"catch",
"class",
"companion",
"const",
"constructor",
"continue",
"crossinline",
"data",
"delegate",
"do",
"else",
"enum",
"external",
"false",
"final",
"finally",
"for",
"fun",
"if",
"in",
"infix",
"init",
"inline",
"inner",
"interface",
"internal",
"is",
"it",
"lateinit",
"lazy",
"noinline",
"null",
"object",
"open",
"operator",
"out",
"override",
"package",
"private",
"protected",
"public",
"reified",
"return",
"sealed",
"super",
"suspend",
"tailrec",
"this",
"throw",
"true",
"try",
"typealias",
"typeof",
"val",
"var",
"vararg",
"when",
"while"
));
defaultIncludes = new HashSet(Arrays.asList(
"kotlin.Byte",
"kotlin.Short",
"kotlin.Int",
"kotlin.Long",
"kotlin.Float",
"kotlin.Double",
"kotlin.Boolean",
"kotlin.Char",
"kotlin.Array",
"kotlin.collections.List",
"kotlin.collections.Set",
"kotlin.collections.Map"
));
instantiationLibraryFunction = new HashSet(Arrays.asList(
"arrayOf",
"mapOf"
));
typeMapping = new HashMap();
typeMapping.put("string", "kotlin.String");
typeMapping.put("boolean", "kotlin.Boolean");
typeMapping.put("integer", "kotlin.Int");
typeMapping.put("float", "kotlin.Float");
typeMapping.put("long", "kotlin.Long");
typeMapping.put("double", "kotlin.Double");
typeMapping.put("number", "java.math.BigDecimal");
typeMapping.put("date-time", "java.time.LocalDateTime");
typeMapping.put("date", "java.time.LocalDateTime");
typeMapping.put("file", "java.io.File");
typeMapping.put("array", "kotlin.Array");
typeMapping.put("list", "kotlin.Array");
typeMapping.put("map", "kotlin.collections.Map");
typeMapping.put("object", "kotlin.Any");
typeMapping.put("binary", "kotlin.Array");
typeMapping.put("Date", "java.time.LocalDateTime");
typeMapping.put("DateTime", "java.time.LocalDateTime");
instantiationTypes.put("array", "arrayOf");
instantiationTypes.put("list", "arrayOf");
instantiationTypes.put("map", "mapOf");
importMapping = new HashMap();
importMapping.put("BigDecimal", "java.math.BigDecimal");
importMapping.put("UUID", "java.util.UUID");
importMapping.put("File", "java.io.File");
importMapping.put("Date", "java.util.Date");
importMapping.put("Timestamp", "java.sql.Timestamp");
importMapping.put("DateTime", "java.time.LocalDateTime");
importMapping.put("LocalDateTime", "java.time.LocalDateTime");
importMapping.put("LocalDate", "java.time.LocalDate");
importMapping.put("LocalTime", "java.time.LocalTime");
specialCharReplacements.put(";", "Semicolon");
cliOptions.clear();
addOption(CodegenConstants.SOURCE_FOLDER, CodegenConstants.SOURCE_FOLDER_DESC, sourceFolder);
addOption(CodegenConstants.PACKAGE_NAME, "Generated artifact package name (e.g. io.swagger).", packageName);
addOption(CodegenConstants.GROUP_ID, "Generated artifact package's organization (i.e. maven groupId).", groupId);
addOption(CodegenConstants.ARTIFACT_ID, "Generated artifact id (name of jar).", artifactId);
addOption(CodegenConstants.ARTIFACT_VERSION, "Generated artifact's package version.", artifactVersion);
CliOption enumPropertyNamingOpt = new CliOption(CodegenConstants.ENUM_PROPERTY_NAMING, CodegenConstants.ENUM_PROPERTY_NAMING_DESC);
cliOptions.add(enumPropertyNamingOpt.defaultValue(enumPropertyNaming.name()));
}
protected void addOption(String key, String description) {
addOption(key, description, null);
}
protected void addOption(String key, String description, String defaultValue) {
CliOption option = new CliOption(key, description);
if (defaultValue != null) option.defaultValue(defaultValue);
cliOptions.add(option);
}
protected void addSwitch(String key, String description, Boolean defaultValue) {
CliOption option = CliOption.newBoolean(key, description);
if (defaultValue != null) option.defaultValue(defaultValue.toString());
cliOptions.add(option);
}
@Override
public String getArgumentsLocation() {
return "";
}
@Override
public String apiDocFileFolder() {
return (outputFolder + "/" + apiDocPath).replace('/', File.separatorChar);
}
@Override
public String apiFileFolder() {
return outputFolder + File.separator + sourceFolder + File.separator + apiPackage().replace('.', File.separatorChar);
}
@Override
public String escapeQuotationMark(String input) {
// remove " to avoid code injection
return input.replace("\"", "");
}
@Override
public String escapeReservedWord(String name) {
// TODO: Allow enum escaping as an option (e.g. backticks vs append/prepend underscore vs match model property escaping).
return String.format("`%s`", name);
}
@Override
public String escapeUnsafeCharacters(String input) {
return input.replace("*/", "*_/").replace("/*", "/_*");
}
public CodegenConstants.ENUM_PROPERTY_NAMING_TYPE getEnumPropertyNaming() {
return this.enumPropertyNaming;
}
/**
* Sets the naming convention for Kotlin enum properties
*
* @param enumPropertyNamingType The string representation of the naming convention, as defined by {@link CodegenConstants.ENUM_PROPERTY_NAMING_TYPE}
*/
public void setEnumPropertyNaming(final String enumPropertyNamingType) {
try {
this.enumPropertyNaming = CodegenConstants.ENUM_PROPERTY_NAMING_TYPE.valueOf(enumPropertyNamingType);
} catch (IllegalArgumentException ex) {
StringBuilder sb = new StringBuilder(enumPropertyNamingType + " is an invalid enum property naming option. Please choose from:");
for (CodegenConstants.ENUM_PROPERTY_NAMING_TYPE t : CodegenConstants.ENUM_PROPERTY_NAMING_TYPE.values()) {
sb.append("\n ").append(t.name());
}
throw new RuntimeException(sb.toString());
}
}
/**
* Output the type declaration of the property
*
* @param propertySchema Swagger Property object
* @return a string presentation of the property type
*/
@Override
public String getTypeDeclaration(Schema propertySchema) {
if (propertySchema instanceof ArraySchema) {
return getArrayTypeDeclaration((ArraySchema) propertySchema);
} else if (propertySchema instanceof MapSchema || propertySchema.getAdditionalProperties() != null) {
Schema inner = (Schema) propertySchema.getAdditionalProperties();
if (inner == null) {
LOGGER.warn(propertySchema.getName() + "(map property) does not have a proper inner type defined");
// TODO maybe better defaulting to StringProperty than returning null
return null;
}
// Maps will be keyed only by primitive Kotlin string
return String.format("%s", getSchemaType(propertySchema), getTypeDeclaration(inner));
}
return super.getTypeDeclaration(propertySchema);
}
@Override
public String getAlias(String name) {
if (typeAliases != null && typeAliases.containsKey(name)) {
return typeAliases.get(name);
}
return name;
}
@Override
public String getSchemaType(Schema schema) {
String schemaType = super.getSchemaType(schema);
// don't apply renaming on types from the typeMapping
if (typeMapping.containsKey(schemaType)) {
return toModelName(typeMapping.get(schemaType));
}
if (null == schemaType) {
if (schema.getName() != null) {
LOGGER.warn("No Type defined for Property " + schema.getName());
return toModelName(schema.getName());
} else {
return toModelName("kotlin.Any");
}
}
return toModelName(schemaType);
}
@Override
public String modelDocFileFolder() {
return (outputFolder + "/" + modelDocPath).replace('/', File.separatorChar);
}
@Override
public String modelFileFolder() {
return outputFolder + File.separator + sourceFolder + File.separator + modelPackage().replace('.', File.separatorChar);
}
@Override
public Map postProcessModels(Map objs) {
return postProcessModelsEnum(super.postProcessModels(objs));
}
@Override
public void processOpts() {
super.processOpts();
if (additionalProperties.containsKey(CodegenConstants.ENUM_PROPERTY_NAMING)) {
setEnumPropertyNaming((String) additionalProperties.get(CodegenConstants.ENUM_PROPERTY_NAMING));
}
if (additionalProperties.containsKey(CodegenConstants.SOURCE_FOLDER)) {
this.setSourceFolder((String) additionalProperties.get(CodegenConstants.SOURCE_FOLDER));
} else {
additionalProperties.put(CodegenConstants.SOURCE_FOLDER, sourceFolder);
}
if (additionalProperties.containsKey(CodegenConstants.PACKAGE_NAME)) {
this.setPackageName((String) additionalProperties.get(CodegenConstants.PACKAGE_NAME));
if (!additionalProperties.containsKey(CodegenConstants.MODEL_PACKAGE))
this.setModelPackage(packageName + ".models");
if (!additionalProperties.containsKey(CodegenConstants.API_PACKAGE))
this.setApiPackage(packageName + ".apis");
} else {
additionalProperties.put(CodegenConstants.PACKAGE_NAME, packageName);
}
if (additionalProperties.containsKey(CodegenConstants.ARTIFACT_ID)) {
this.setArtifactId((String) additionalProperties.get(CodegenConstants.ARTIFACT_ID));
} else {
additionalProperties.put(CodegenConstants.ARTIFACT_ID, artifactId);
}
if (additionalProperties.containsKey(CodegenConstants.GROUP_ID)) {
this.setGroupId((String) additionalProperties.get(CodegenConstants.GROUP_ID));
} else {
additionalProperties.put(CodegenConstants.GROUP_ID, groupId);
}
if (additionalProperties.containsKey(CodegenConstants.ARTIFACT_VERSION)) {
this.setArtifactVersion((String) additionalProperties.get(CodegenConstants.ARTIFACT_VERSION));
} else {
additionalProperties.put(CodegenConstants.ARTIFACT_VERSION, artifactVersion);
}
if (additionalProperties.containsKey(CodegenConstants.INVOKER_PACKAGE)) {
LOGGER.warn(CodegenConstants.INVOKER_PACKAGE + " with " + this.getName() + " generator is ignored. Use " + CodegenConstants.PACKAGE_NAME + ".");
}
additionalProperties.put(CodegenConstants.API_PACKAGE, apiPackage());
additionalProperties.put(CodegenConstants.MODEL_PACKAGE, modelPackage());
additionalProperties.put("apiDocPath", apiDocPath);
additionalProperties.put("modelDocPath", modelDocPath);
}
public void setArtifactId(String artifactId) {
this.artifactId = artifactId;
}
public void setArtifactVersion(String artifactVersion) {
this.artifactVersion = artifactVersion;
}
public void setGroupId(String groupId) {
this.groupId = groupId;
}
public void setPackageName(String packageName) {
this.packageName = packageName;
}
public void setSourceFolder(String sourceFolder) {
this.sourceFolder = sourceFolder;
}
/**
* Return the sanitized variable name for enum
*
* @param value enum variable name
* @param datatype data type
* @return the sanitized variable name for enum
*/
@Override
public String toEnumVarName(String value, String datatype) {
String modified;
if (value.length() == 0) {
modified = "EMPTY";
} else {
modified = value;
modified = sanitizeKotlinSpecificNames(modified);
}
switch (getEnumPropertyNaming()) {
case original:
// NOTE: This is provided as a last-case allowance, but will still result in reserved words being escaped.
modified = value;
break;
case camelCase:
// NOTE: Removes hyphens and underscores
modified = camelize(modified, true);
break;
case PascalCase:
// NOTE: Removes hyphens and underscores
String result = camelize(modified);
modified = titleCase(result);
break;
case snake_case:
// NOTE: Removes hyphens
modified = underscore(modified);
break;
case UPPERCASE:
modified = modified.toUpperCase();
break;
}
if (reservedWords.contains(modified)) {
return escapeReservedWord(modified);
}
return modified;
}
@Override
public String toInstantiationType(Schema p) {
if (p instanceof ArraySchema) {
return getArrayTypeDeclaration((ArraySchema) p);
}
return super.toInstantiationType(p);
}
/**
* Return the fully-qualified "Model" name for import
*
* @param name the name of the "Model"
* @return the fully-qualified "Model" name for import
*/
@Override
public String toModelImport(String name) {
// toModelImport is called while processing operations, but DefaultCodegen doesn't
// define imports correctly with fully qualified primitives and models as defined in this generator.
if (needToImport(name)) {
return super.toModelImport(name);
}
return name;
}
/**
* Output the proper model name (capitalized).
* In case the name belongs to the TypeSystem it won't be renamed.
*
* @param name the name of the model
* @return capitalized model name
*/
@Override
public String toModelName(final String name) {
// Allow for explicitly configured kotlin.* and java.* types
if (name.startsWith("kotlin.") || name.startsWith("java.")) {
return name;
}
// If importMapping contains name, assume this is a legitimate model name.
if (importMapping.containsKey(name)) {
return importMapping.get(name);
}
String modifiedName = name.replaceAll("\\.", "");
modifiedName = sanitizeKotlinSpecificNames(modifiedName);
if (reservedWords.contains(modifiedName)) {
modifiedName = escapeReservedWord(modifiedName);
}
return titleCase(modifiedName);
}
@Override
public String toVarName(String name) {
return super.toVarName(sanitizeKotlinSpecificNames(name));
}
/**
* Provides a strongly typed declaration for simple arrays of some type and arrays of arrays of some type.
*
* @param arr
* @return
*/
private String getArrayTypeDeclaration(ArraySchema arraySchema) {
// TODO: collection type here should be fully qualified namespace to avoid model conflicts
// This supports arrays of arrays.
String arrayType = typeMapping.get("array");
StringBuilder instantiationType = new StringBuilder(arrayType);
Schema items = arraySchema.getItems();
String nestedType = getTypeDeclaration(items);
// TODO: We may want to differentiate here between generics and primitive arrays.
instantiationType.append("<").append(nestedType).append(">");
return instantiationType.toString();
}
/**
* Sanitize against Kotlin specific naming conventions, which may differ from those required by {@link DefaultCodegen#sanitizeName}.
*
* @param name string to be sanitize
* @return sanitized string
*/
private String sanitizeKotlinSpecificNames(final String name) {
String word = removeNonNameElementToCamelCase(name);
for (Map.Entry specialCharacters : specialCharReplacements.entrySet()) {
// Underscore is the only special character we'll allow
if (!specialCharacters.getKey().equals("_")) {
word = word.replaceAll("\\Q" + specialCharacters.getKey() + "\\E", specialCharacters.getValue());
}
}
// Fallback, replace unknowns with underscore.
word = word.replaceAll("\\W+", "_");
if (word.matches("\\d.*")) {
word = "_" + word;
}
// _, __, and ___ are reserved in Kotlin. Treat all names with only underscores consistently, regardless of count.
if (word.matches("^_*$")) {
word = word.replaceAll("\\Q_\\E", "Underscore");
}
return word;
}
private String titleCase(final String input) {
return input.substring(0, 1).toUpperCase() + input.substring(1);
}
@Override
protected boolean isReservedWord(String word) {
// We want case-sensitive escaping, to avoid unnecessary backtick-escaping.
return reservedWords.contains(word);
}
/**
* Check the type to see if it needs import the library/module/package
*
* @param type name of the type
* @return true if the library/module/package of the corresponding type needs to be imported
*/
@Override
protected boolean needToImport(String type) {
// provides extra protection against improperly trying to import language primitives and java types
boolean imports =
!type.startsWith("kotlin.") &&
!type.startsWith("java.") &&
!defaultIncludes.contains(type) &&
!languageSpecificPrimitives.contains(type) &&
!instantiationLibraryFunction.contains(type);
return imports;
}
}
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