[kotlin-spring] fix BigDecimal default value failed to compile (#17956)

Author: irasychan

.github/workflows/samples-kotlin-server.yaml

@@ -27,6 +27,7 @@ jobs:
         sample:
           # server
           - samples/server/petstore/kotlin-springboot
+          - samples/server/petstore/kotlin-springboot-bigdecimal-default
           - samples/server/petstore/kotlin-springboot-delegate
           - samples/server/petstore/kotlin-springboot-modelMutable
           - samples/server/petstore/kotlin-springboot-reactive

bin/configs/kotlin-spring-boot-bigdecimal-default.yaml

@@ -0,0 +1,5 @@
+generatorName: kotlin-spring
+outputDir: samples/server/petstore/kotlin-springboot-bigdecimal-default
+library: spring-boot
+inputSpec: modules/openapi-generator/src/test/resources/3_0/issue_14584_bigdecimal_default.yaml
+templateDir: modules/openapi-generator/src/main/resources/kotlin-spring

modules/openapi-generator/src/main/resources/kotlin-spring/dataClassOptVar.mustache

@@ -2,4 +2,4 @@
     @Schema({{#example}}example = "{{#lambdaRemoveLineBreak}}{{#lambdaEscapeInNormalString}}{{{.}}}{{/lambdaEscapeInNormalString}}{{/lambdaRemoveLineBreak}}", {{/example}}{{#isReadOnly}}readOnly = {{{isReadOnly}}}, {{/isReadOnly}}description = "{{{description}}}"){{/swagger2AnnotationLibrary}}{{#swagger1AnnotationLibrary}}
     @ApiModelProperty({{#example}}example = "{{#lambdaRemoveLineBreak}}{{#lambdaEscapeInNormalString}}{{{.}}}{{/lambdaEscapeInNormalString}}{{/lambdaRemoveLineBreak}}", {{/example}}{{#isReadOnly}}readOnly = {{{isReadOnly}}}, {{/isReadOnly}}value = "{{{description}}}"){{/swagger1AnnotationLibrary}}{{#deprecated}}
     @Deprecated(message = ""){{/deprecated}}
-    @get:JsonProperty("{{{baseName}}}"){{#isInherited}} override{{/isInherited}} {{>modelMutable}} {{{name}}}: {{#isEnum}}{{#isArray}}{{baseType}}<{{/isArray}}{{classname}}.{{{nameInCamelCase}}}{{#isArray}}>{{/isArray}}{{/isEnum}}{{^isEnum}}{{{dataType}}}{{/isEnum}}? = {{{defaultValue}}}{{^defaultValue}}null{{/defaultValue}}
+    @get:JsonProperty("{{{baseName}}}"){{#isInherited}} override{{/isInherited}} {{>modelMutable}} {{{name}}}: {{#isEnum}}{{#isArray}}{{baseType}}<{{/isArray}}{{classname}}.{{{nameInCamelCase}}}{{#isArray}}>{{/isArray}}{{/isEnum}}{{^isEnum}}{{{dataType}}}{{/isEnum}}? = {{^defaultValue}}null{{/defaultValue}}{{#defaultValue}}{{^isNumber}}{{{defaultValue}}}{{/isNumber}}{{#isNumber}}{{{dataType}}}("{{{defaultValue}}}"){{/isNumber}}{{/defaultValue}}

modules/openapi-generator/src/main/resources/kotlin-spring/dataClassReqVar.mustache

@@ -1,4 +1,4 @@
 {{#useBeanValidation}}{{>beanValidation}}{{>beanValidationModel}}{{/useBeanValidation}}{{#swagger2AnnotationLibrary}}
     @Schema({{#example}}example = "{{#lambdaRemoveLineBreak}}{{#lambdaEscapeInNormalString}}{{{.}}}{{/lambdaEscapeInNormalString}}{{/lambdaRemoveLineBreak}}", {{/example}}required = true, {{#isReadOnly}}readOnly = {{{isReadOnly}}}, {{/isReadOnly}}description = "{{{description}}}"){{/swagger2AnnotationLibrary}}{{#swagger1AnnotationLibrary}}
     @ApiModelProperty({{#example}}example = "{{#lambdaRemoveLineBreak}}{{#lambdaEscapeInNormalString}}{{{.}}}{{/lambdaEscapeInNormalString}}{{/lambdaRemoveLineBreak}}", {{/example}}required = true, {{#isReadOnly}}readOnly = {{{isReadOnly}}}, {{/isReadOnly}}value = "{{{description}}}"){{/swagger1AnnotationLibrary}}
-    @get:JsonProperty("{{{baseName}}}", required = true){{#isInherited}} override{{/isInherited}} {{>modelMutable}} {{{name}}}: {{#isEnum}}{{#isArray}}{{baseType}}<{{/isArray}}{{classname}}.{{{nameInCamelCase}}}{{#isArray}}>{{/isArray}}{{/isEnum}}{{^isEnum}}{{{dataType}}}{{/isEnum}}{{#isNullable}}?{{/isNullable}}{{#defaultValue}} = {{{.}}}{{/defaultValue}}
+    @get:JsonProperty("{{{baseName}}}", required = true){{#isInherited}} override{{/isInherited}} {{>modelMutable}} {{{name}}}: {{#isEnum}}{{#isArray}}{{baseType}}<{{/isArray}}{{classname}}.{{{nameInCamelCase}}}{{#isArray}}>{{/isArray}}{{/isEnum}}{{^isEnum}}{{{dataType}}}{{/isEnum}}{{#isNullable}}?{{/isNullable}}{{#defaultValue}} = {{^isNumber}}{{{defaultValue}}}{{/isNumber}}{{#isNumber}}{{{dataType}}}("{{{defaultValue}}}"){{/isNumber}}{{/defaultValue}}

modules/openapi-generator/src/test/resources/3_0/issue_14584_bigdecimal_default.yaml

@@ -0,0 +1,47 @@
+openapi: 3.0.0
+info:
+  version: 1.0.0
+  title: Demo
+paths:
+  '/test':
+    post:
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/Apa"
+        required: true
+      responses:
+        200:
+          description: Successful operation
+
+components:
+  schemas:
+    Apa:
+      type: object
+      required:
+        - bepa
+        - cepa
+      properties:
+        bepa:
+          type: number
+          format: long
+          default: 0
+        cepa:
+          type: number
+          default: 6.28318
+        depa:
+          type: number
+          default: 71
+        epa:
+          type: number
+          nullable: false
+          default: -71
+        fepa:
+          type: number
+          nullable: true
+          deprecated: true
+          default: 100
+        gepa:
+          type: number
+          nullable: true

samples/server/petstore/kotlin-springboot-bigdecimal-default/.openapi-generator-ignore

@@ -0,0 +1,23 @@
+# OpenAPI Generator Ignore
+# Generated by openapi-generator https://github.com/openapitools/openapi-generator
+
+# Use this file to prevent files from being overwritten by the generator.
+# The patterns follow closely to .gitignore or .dockerignore.
+
+# As an example, the C# client generator defines ApiClient.cs.
+# You can make changes and tell OpenAPI Generator to ignore just this file by uncommenting the following line:
+#ApiClient.cs
+
+# You can match any string of characters against a directory, file or extension with a single asterisk (*):
+#foo/*/qux
+# The above matches foo/bar/qux and foo/baz/qux, but not foo/bar/baz/qux
+
+# You can recursively match patterns against a directory, file or extension with a double asterisk (**):
+#foo/**/qux
+# This matches foo/bar/qux, foo/baz/qux, and foo/bar/baz/qux
+
+# You can also negate patterns with an exclamation (!).
+# For example, you can ignore all files in a docs folder with the file extension .md:
+#docs/*.md
+# Then explicitly reverse the ignore rule for a single file:
+#!docs/README.md

samples/server/petstore/kotlin-springboot-bigdecimal-default/.openapi-generator/FILES

@@ -0,0 +1,13 @@
+README.md
+build.gradle.kts
+pom.xml
+settings.gradle
+src/main/kotlin/org/openapitools/Application.kt
+src/main/kotlin/org/openapitools/HomeController.kt
+src/main/kotlin/org/openapitools/SpringDocConfiguration.kt
+src/main/kotlin/org/openapitools/api/ApiUtil.kt
+src/main/kotlin/org/openapitools/api/Exceptions.kt
+src/main/kotlin/org/openapitools/api/TestApiController.kt
+src/main/kotlin/org/openapitools/model/Apa.kt
+src/main/resources/application.yaml
+src/main/resources/openapi.yaml

samples/server/petstore/kotlin-springboot-bigdecimal-default/.openapi-generator/VERSION

@@ -0,0 +1 @@
+7.4.0-SNAPSHOT

samples/server/petstore/kotlin-springboot-bigdecimal-default/README.md

@@ -0,0 +1,21 @@
+# demo
+
+This Kotlin based [Spring Boot](https://spring.io/projects/spring-boot) application has been generated using the [OpenAPI Generator](https://github.com/OpenAPITools/openapi-generator).
+
+## Getting Started
+
+This document assumes you have either maven or gradle available, either via the wrapper or otherwise. This does not come with a gradle / maven wrapper checked in.
+
+By default a [`pom.xml`](pom.xml) file will be generated. If you specified `gradleBuildFile=true` when generating this project, a `build.gradle.kts` will also be generated. Note this uses [Gradle Kotlin DSL](https://github.com/gradle/kotlin-dsl).
+
+To build the project using maven, run:
+```bash
+mvn package && java -jar target/openapi-spring-1.0.0.jar
+```
+
+To build the project using gradle, run:
+```bash
+gradle build && java -jar build/libs/openapi-spring-1.0.0.jar
+```
+
+If all builds successfully, the server should run on [http://localhost:8080/](http://localhost:8080/)

samples/server/petstore/kotlin-springboot-bigdecimal-default/build.gradle.kts

@@ -0,0 +1,50 @@
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+    dependencies {
+        classpath("org.springframework.boot:spring-boot-gradle-plugin:2.6.7")
+    }
+}
+
+group = "org.openapitools"
+version = "1.0.0"
+
+repositories {
+    mavenCentral()
+}
+
+tasks.withType<KotlinCompile> {
+    kotlinOptions.jvmTarget = "1.8"
+}
+
+plugins {
+    val kotlinVersion = "1.6.21"
+    id("org.jetbrains.kotlin.jvm") version kotlinVersion
+    id("org.jetbrains.kotlin.plugin.jpa") version kotlinVersion
+    id("org.jetbrains.kotlin.plugin.spring") version kotlinVersion
+    id("org.springframework.boot") version "2.6.7"
+    id("io.spring.dependency-management") version "1.0.11.RELEASE"
+}
+
+dependencies {
+    compile("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
+    compile("org.jetbrains.kotlin:kotlin-reflect")
+    compile("org.springframework.boot:spring-boot-starter-web")
+    compile("org.springdoc:springdoc-openapi-ui:1.6.8")
+
+    compile("com.google.code.findbugs:jsr305:3.0.2")
+    compile("com.fasterxml.jackson.dataformat:jackson-dataformat-yaml")
+    compile("com.fasterxml.jackson.dataformat:jackson-dataformat-xml")
+    compile("com.fasterxml.jackson.datatype:jackson-datatype-jsr310")
+    compile("com.fasterxml.jackson.module:jackson-module-kotlin")
+    compile("jakarta.validation:jakarta.validation-api")
+    compile("jakarta.annotation:jakarta.annotation-api:2.1.0")
+
+    testCompile("org.jetbrains.kotlin:kotlin-test-junit5")
+    testCompile("org.springframework.boot:spring-boot-starter-test") {
+        exclude(module = "junit")
+    }
+}