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io.swagger.codegen.v3.generators.kotlin.AbstractKotlinCodegen Maven / Gradle / Ivy
package io.swagger.codegen.v3.generators.kotlin;
import com.github.jknack.handlebars.helper.ConditionalHelpers;
import io.swagger.codegen.v3.CliOption;
import io.swagger.codegen.v3.CodegenConstants;
import io.swagger.codegen.v3.CodegenModel;
import io.swagger.codegen.v3.CodegenProperty;
import io.swagger.codegen.v3.generators.DefaultCodegenConfig;
import io.swagger.v3.oas.models.media.ArraySchema;
import io.swagger.v3.oas.models.media.MapSchema;
import io.swagger.v3.oas.models.media.ObjectSchema;
import io.swagger.v3.oas.models.media.Schema;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.github.jknack.handlebars.helper.StringHelpers;
import com.github.jknack.handlebars.Handlebars;
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/";
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",
"kotlin.ByteArray",
"kotlin.CharArray",
"kotlin.ShortArray",
"kotlin.IntArray",
"kotlin.LongArray",
"kotlin.FloatArray",
"kotlin.DoubleArray",
"kotlin.BooleanArray"
));
// 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",
"actual",
"annotation",
"as",
"break",
"case",
"catch",
"class",
"companion",
"const",
"constructor",
"continue",
"crossinline",
"data",
"delegate",
"do",
"else",
"enum",
"expect",
"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",
"kotlin.ByteArray",
"kotlin.CharArray",
"kotlin.ShortArray",
"kotlin.IntArray",
"kotlin.LongArray",
"kotlin.FloatArray",
"kotlin.DoubleArray",
"kotlin.BooleanArray"
));
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.LocalDate");
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.LocalDate");
typeMapping.put("DateTime", "java.time.LocalDateTime");
typeMapping.put("ByteArray", "kotlin.ByteArray");
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");
specialCharReplacements.put(":", "Colon");
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);
}
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("/*", "/_*");
}
protected void updateCodegenModelEnumVars(CodegenModel codegenModel) {
super.updateCodegenModelEnumVars(codegenModel);
for (CodegenProperty var : codegenModel.allVars) {
updateCodegenPropertyEnum(var);
}
}
/**
* 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 && hasSchemaProperties(propertySchema)) {
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));
} else if (propertySchema instanceof MapSchema && hasTrueAdditionalProperties(propertySchema)) {
Schema inner = new ObjectSchema();
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.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);
}
modified = modified.toUpperCase();
if (isReservedWord(modified)) {
return escapeReservedWord(modified);
}
return modified;
}
@Override
public String toEnumValue(String value, String datatype) {
if (isPrimivite(datatype)) {
return value;
}
return super.toEnumValue(value, datatype);
}
@Override
public boolean isPrimivite(String datatype) {
return "kotlin.Byte".equalsIgnoreCase(datatype)
|| "kotlin.Short".equalsIgnoreCase(datatype)
|| "kotlin.Int".equalsIgnoreCase(datatype)
|| "kotlin.Long".equalsIgnoreCase(datatype)
|| "kotlin.Float".equalsIgnoreCase(datatype)
|| "kotlin.Double".equalsIgnoreCase(datatype)
|| "kotlin.Boolean".equalsIgnoreCase(datatype);
}
@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);
modifiedName = titleCase(modifiedName);
if (modifiedName.equalsIgnoreCase("Companion")) {
modifiedName = "_" + modifiedName;
}
return modifiedName;
}
@Override
public String toVarName(String name) {
return super.toVarName(sanitizeKotlinSpecificNames(name));
}
@Override
public String toEnumName(CodegenProperty property) {
return StringUtils.capitalize(property.name);
}
@Override
public void addHandlebarHelpers(Handlebars handlebars) {
super.addHandlebarHelpers(handlebars);
handlebars.registerHelpers(StringHelpers.class);
handlebars.registerHelpers(ConditionalHelpers.class);
}
/**
* Provides a strongly typed declaration for simple arrays of some type and arrays of arrays of some type.
*
* @param arraySchema
* @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 DefaultCodegenConfig#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;
}
}
