[Java][Spring] default value for list parameter

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractJavaCodegen.java

@@ -17,6 +17,8 @@
 
 package org.openapitools.codegen.languages;
 
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.node.ArrayNode;
 import com.google.common.base.Strings;
 import com.google.common.collect.Sets;
 import io.swagger.v3.oas.models.OpenAPI;
@@ -45,7 +47,9 @@
 import java.util.*;
 import java.util.concurrent.ConcurrentSkipListSet;
 import java.util.regex.Pattern;
+import java.util.stream.Collectors;
 import java.util.stream.Stream;
+import java.util.stream.StreamSupport;
 
 import static org.openapitools.codegen.utils.StringUtils.*;
 
@@ -1004,6 +1008,17 @@ public String toDefaultParameterValue(final Schema<?> schema) {
             LocalDate localDate = date.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
             return localDate.toString();
         }
+        if (ModelUtils.isArraySchema(schema)) {
+            if (defaultValue instanceof ArrayNode) {
+                ArrayNode array = (ArrayNode) defaultValue;
+                return StreamSupport.stream(array.spliterator(), false)
+                    .map(JsonNode::toString)
+                    // remove wrapper quotes
+                    .map(item -> StringUtils.removeStart(item, "\""))
+                    .map(item -> StringUtils.removeEnd(item, "\""))
+                    .collect(Collectors.joining(","));
+            }
+        }
         // escape quotes
         return defaultValue.toString().replace("\"", "\\\"");
     }

modules/openapi-generator/src/main/resources/JavaSpring/cookieParams.mustache

@@ -1 +1 @@
-{{#isCookieParam}}{{#useBeanValidation}}{{>beanValidationQueryParams}}{{/useBeanValidation}}{{>paramDoc}} @CookieValue(name="{{baseName}}"{{^isContainer}}{{#defaultValue}}, defaultValue = "{{{.}}}"{{/defaultValue}}{{/isContainer}}){{>dateTimeParam}} {{>optionalDataType}} {{paramName}}{{/isCookieParam}}
+{{#isCookieParam}}{{#useBeanValidation}}{{>beanValidationQueryParams}}{{/useBeanValidation}}{{>paramDoc}} @CookieValue(name="{{baseName}}"{{#defaultValue}}, defaultValue = "{{{.}}}"{{/defaultValue}}){{>dateTimeParam}} {{>optionalDataType}} {{paramName}}{{/isCookieParam}}

modules/openapi-generator/src/main/resources/JavaSpring/headerParams.mustache

@@ -1 +1 @@
-{{#isHeaderParam}}{{>paramDoc}} @RequestHeader(value = "{{baseName}}", required = {{#required}}true{{/required}}{{^required}}false{{/required}}{{^isContainer}}{{#defaultValue}}, defaultValue = "{{{.}}}"{{/defaultValue}}{{/isContainer}}){{>dateTimeParam}} {{>optionalDataType}} {{paramName}}{{/isHeaderParam}}
+{{#isHeaderParam}}{{>paramDoc}} @RequestHeader(value = "{{baseName}}", required = {{#required}}true{{/required}}{{^required}}false{{/required}}{{#defaultValue}}, defaultValue = "{{{.}}}"{{/defaultValue}}){{>dateTimeParam}} {{>optionalDataType}} {{paramName}}{{/isHeaderParam}}

modules/openapi-generator/src/main/resources/JavaSpring/paramDoc.mustache

@@ -1 +1 @@
-{{#swagger2AnnotationLibrary}}@Parameter(name = "{{{baseName}}}", description = "{{{description}}}"{{#required}}, required = true{{/required}}){{/swagger2AnnotationLibrary}}{{#swagger1AnnotationLibrary}}@ApiParam(value = "{{{description}}}"{{#required}}, required = true{{/required}}{{#allowableValues}}, {{> allowableValues }}{{/allowableValues}}{{^isContainer}}{{#defaultValue}}, defaultValue = "{{{.}}}"{{/defaultValue}}{{/isContainer}}){{/swagger1AnnotationLibrary}}
+{{#swagger2AnnotationLibrary}}@Parameter(name = "{{{baseName}}}", description = "{{{description}}}"{{#required}}, required = true{{/required}}){{/swagger2AnnotationLibrary}}{{#swagger1AnnotationLibrary}}@ApiParam(value = "{{{description}}}"{{#required}}, required = true{{/required}}{{#allowableValues}}, {{> allowableValues }}{{/allowableValues}}{{#defaultValue}}, defaultValue = "{{{.}}}"{{/defaultValue}}){{/swagger1AnnotationLibrary}}

modules/openapi-generator/src/main/resources/JavaSpring/queryParams.mustache

@@ -1 +1 @@
-{{#isQueryParam}}{{#useBeanValidation}}{{>beanValidationQueryParams}}{{/useBeanValidation}}{{>paramDoc}}{{#useBeanValidation}} @Valid{{/useBeanValidation}}{{^isModel}} @RequestParam(value = {{#isMap}}""{{/isMap}}{{^isMap}}"{{baseName}}"{{/isMap}}{{#required}}, required = true{{/required}}{{^required}}, required = false{{/required}}{{^isContainer}}{{#defaultValue}}, defaultValue = "{{{.}}}"{{/defaultValue}}{{/isContainer}}){{/isModel}}{{>dateTimeParam}} {{>optionalDataType}} {{paramName}}{{/isQueryParam}}
+{{#isQueryParam}}{{#useBeanValidation}}{{>beanValidationQueryParams}}{{/useBeanValidation}}{{>paramDoc}}{{#useBeanValidation}} @Valid{{/useBeanValidation}}{{^isModel}} @RequestParam(value = {{#isMap}}""{{/isMap}}{{^isMap}}"{{baseName}}"{{/isMap}}{{#required}}, required = true{{/required}}{{^required}}, required = false{{/required}}{{#defaultValue}}, defaultValue = "{{{.}}}"{{/defaultValue}}){{/isModel}}{{>dateTimeParam}} {{>optionalDataType}} {{paramName}}{{/isQueryParam}}

modules/openapi-generator/src/test/java/org/openapitools/codegen/java/spring/SpringCodegenTest.java

@@ -1274,4 +1274,52 @@ public void testResponseWithArray_issue11897() throws Exception {
             .toFileAssert()
             .assertMethod("getWithMapOfStrings").hasReturnType("ResponseEntity<Map<String, String>>");
     }
+
+    @Test
+    public void shouldSetDefaultValueForMultipleArrayItems() throws IOException {
+        File output = Files.createTempDirectory("test").toFile().getCanonicalFile();
+        output.deleteOnExit();
+
+        OpenAPI openAPI = new OpenAPIParser()
+            .readLocation("src/test/resources/bugs/issue_11957.yaml", null, new ParseOptions()).getOpenAPI();
+        SpringCodegen codegen = new SpringCodegen();
+        codegen.setLibrary(SPRING_BOOT);
+        codegen.setOutputDir(output.getAbsolutePath());
+        codegen.additionalProperties().put(AbstractJavaCodegen.FULL_JAVA_UTIL, "true");
+        codegen.additionalProperties().put(SpringCodegen.USE_TAGS, "true");
+        codegen.additionalProperties().put(SpringCodegen.INTERFACE_ONLY, "true");
+        codegen.additionalProperties().put(SpringCodegen.SKIP_DEFAULT_INTERFACE, "true");
+        codegen.additionalProperties().put(SpringCodegen.PERFORM_BEANVALIDATION, "true");
+        codegen.additionalProperties().put(SpringCodegen.SPRING_CONTROLLER, "true");
+        codegen.additionalProperties().put(CodegenConstants.SERIALIZATION_LIBRARY, "jackson");
+
+        ClientOptInput input = new ClientOptInput()
+            .openAPI(openAPI)
+            .config(codegen);
+
+        DefaultGenerator generator = new DefaultGenerator();
+        Map<String, File> files = generator.opts(input).generate().stream()
+            .collect(Collectors.toMap(File::getName, Function.identity()));
+
+        JavaFileAssert.assertThat(files.get("SearchApi.java"))
+            .assertMethod("defaultList")
+                .hasParameter("orderBy")
+                .assertParameterAnnotations()
+                .containsWithNameAndAttributes("RequestParam", ImmutableMap.of("defaultValue", "\"updatedAt:DESC,createdAt:DESC\""))
+            .toParameter().toMethod().toFileAssert()
+            .assertMethod("defaultSet")
+                .hasParameter("orderBy")
+                .assertParameterAnnotations()
+                .containsWithNameAndAttributes("RequestParam", ImmutableMap.of("defaultValue", "\"updatedAt:DESC,createdAt:DESC\""))
+            .toParameter().toMethod().toFileAssert()
+            .assertMethod("emptyDefaultList")
+                .hasParameter("orderBy")
+                .assertParameterAnnotations()
+                .containsWithNameAndAttributes("RequestParam", ImmutableMap.of("defaultValue", "\"\""))
+            .toParameter().toMethod().toFileAssert()
+            .assertMethod("emptyDefaultSet")
+                .hasParameter("orderBy")
+                .assertParameterAnnotations()
+                .containsWithNameAndAttributes("RequestParam", ImmutableMap.of("defaultValue", "\"\""));
+    }
 }

modules/openapi-generator/src/test/resources/bugs/issue_11957.yaml

@@ -0,0 +1,109 @@
+openapi: '3.0.2'
+info:
+  title: Search API
+  version: '1.0'
+servers:
+- url: http://localhost:8080/api/v1
+tags:
+- name: "search"
+paths:
+  /default-list:
+    get:
+      tags:
+      - search
+      operationId: defaultList
+      parameters:
+      - in: query
+        name: p
+        schema:
+          type: integer
+          default: 0
+          minimum: 0
+      - in: query
+        name: orderBy
+        schema:
+          type: array
+          default: ["updatedAt:DESC", "createdAt:DESC"]
+          items:
+            type: string
+            enum: [ "createdAt:ASC", "createdAt:DESC",
+                    "updatedAt:ASC", "updatedAt:DESC" ]
+      responses:
+        204:
+          description: "Custom response"
+  /empty-default-list:
+    get:
+      tags:
+        - search
+      operationId: emptyDefaultList
+      parameters:
+        - in: query
+          name: p
+          description: Page
+          schema:
+            type: integer
+            default: 0
+            minimum: 0
+        - in: query
+          name: orderBy
+          schema:
+            type: array
+            default: [ ]
+            items:
+              type: string
+              enum: [ "createdAt:ASC", "createdAt:DESC",
+                      "updatedAt:ASC", "updatedAt:DESC" ]
+      responses:
+        204:
+          description: "Custom response"
+  /default-set:
+    get:
+      tags:
+        - search
+      operationId: defaultSet
+      parameters:
+        - in: query
+          name: p
+          schema:
+            type: integer
+            default: 0
+            minimum: 0
+        - in: query
+          name: orderBy
+          schema:
+            type: array
+            default: [ "updatedAt:DESC", "createdAt:DESC" ]
+            uniqueItems: true
+            items:
+              type: string
+              enum: [ "createdAt:ASC", "createdAt:DESC",
+                      "updatedAt:ASC", "updatedAt:DESC" ]
+      responses:
+        204:
+          description: "Custom response"
+  /empty-default-set:
+    get:
+      tags:
+        - search
+      operationId: emptyDefaultSet
+      parameters:
+        - in: query
+          name: p
+          description: Page
+          schema:
+            type: integer
+            default: 0
+            minimum: 0
+        - in: query
+          name: orderBy
+          schema:
+            type: array
+            default: [ ]
+            uniqueItems: true
+            items:
+              type: string
+              enum: [ "createdAt:ASC", "createdAt:DESC",
+                      "updatedAt:ASC", "updatedAt:DESC" ]
+      responses:
+        204:
+          description: "Custom response"

samples/server/petstore/springboot-beanvalidation-no-nullable/src/main/java/org/openapitools/api/FakeApi.java

@@ -395,7 +395,7 @@ default ResponseEntity<Void> testEnumParameters(
         @ApiParam(value = "Query parameter enum test (string)", allowableValues = "_abc, -efg, (xyz)", defaultValue = "-efg") @Valid @RequestParam(value = "enum_query_string", required = false, defaultValue = "-efg") String enumQueryString,
         @ApiParam(value = "Query parameter enum test (double)", allowableValues = "1, -2") @Valid @RequestParam(value = "enum_query_integer", required = false) Integer enumQueryInteger,
         @ApiParam(value = "Query parameter enum test (double)", allowableValues = "1.1, -1.2") @Valid @RequestParam(value = "enum_query_double", required = false) Double enumQueryDouble,
-        @ApiParam(value = "Form parameter enum test (string array)", allowableValues = ">, $") @Valid @RequestParam(value = "enum_form_string_array", required = false) List<String> enumFormStringArray,
+        @ApiParam(value = "Form parameter enum test (string array)", allowableValues = ">, $", defaultValue = "$") @Valid @RequestParam(value = "enum_form_string_array", required = false) List<String> enumFormStringArray,
         @ApiParam(value = "Form parameter enum test (string)", allowableValues = "_abc, -efg, (xyz)", defaultValue = "-efg") @Valid @RequestParam(value = "enum_form_string", required = false) String enumFormString
     ) {
         return new ResponseEntity<>(HttpStatus.NOT_IMPLEMENTED);

samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/FakeApi.java

@@ -395,7 +395,7 @@ default ResponseEntity<Void> testEnumParameters(
         @ApiParam(value = "Query parameter enum test (string)", allowableValues = "_abc, -efg, (xyz)", defaultValue = "-efg") @Valid @RequestParam(value = "enum_query_string", required = false, defaultValue = "-efg") String enumQueryString,
         @ApiParam(value = "Query parameter enum test (double)", allowableValues = "1, -2") @Valid @RequestParam(value = "enum_query_integer", required = false) Integer enumQueryInteger,
         @ApiParam(value = "Query parameter enum test (double)", allowableValues = "1.1, -1.2") @Valid @RequestParam(value = "enum_query_double", required = false) Double enumQueryDouble,
-        @ApiParam(value = "Form parameter enum test (string array)", allowableValues = ">, $") @Valid @RequestParam(value = "enum_form_string_array", required = false) List<String> enumFormStringArray,
+        @ApiParam(value = "Form parameter enum test (string array)", allowableValues = ">, $", defaultValue = "$") @Valid @RequestParam(value = "enum_form_string_array", required = false) List<String> enumFormStringArray,
         @ApiParam(value = "Form parameter enum test (string)", allowableValues = "_abc, -efg, (xyz)", defaultValue = "-efg") @Valid @RequestParam(value = "enum_form_string", required = false) String enumFormString
     ) {
         return new ResponseEntity<>(HttpStatus.NOT_IMPLEMENTED);

samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/FakeApi.java

@@ -364,7 +364,7 @@ default ResponseEntity<Void> testEnumParameters(
         @ApiParam(value = "Query parameter enum test (string)", allowableValues = "_abc, -efg, (xyz)", defaultValue = "-efg") @Valid @RequestParam(value = "enum_query_string", required = false, defaultValue = "-efg") String enumQueryString,
         @ApiParam(value = "Query parameter enum test (double)", allowableValues = "1, -2") @Valid @RequestParam(value = "enum_query_integer", required = false) Integer enumQueryInteger,
         @ApiParam(value = "Query parameter enum test (double)", allowableValues = "1.1, -1.2") @Valid @RequestParam(value = "enum_query_double", required = false) Double enumQueryDouble,
-        @ApiParam(value = "Form parameter enum test (string array)", allowableValues = ">, $") @Valid @RequestParam(value = "enum_form_string_array", required = false) List<String> enumFormStringArray,
+        @ApiParam(value = "Form parameter enum test (string array)", allowableValues = ">, $", defaultValue = "$") @Valid @RequestParam(value = "enum_form_string_array", required = false) List<String> enumFormStringArray,
         @ApiParam(value = "Form parameter enum test (string)", allowableValues = "_abc, -efg, (xyz)", defaultValue = "-efg") @Valid @RequestParam(value = "enum_form_string", required = false) String enumFormString
     ) {
         return getDelegate().testEnumParameters(enumHeaderStringArray, enumHeaderString, enumQueryStringArray, enumQueryString, enumQueryInteger, enumQueryDouble, enumFormStringArray, enumFormString);

samples/server/petstore/springboot-delegate/src/main/java/org/openapitools/api/FakeApi.java

@@ -364,7 +364,7 @@ default ResponseEntity<Void> testEnumParameters(
         @ApiParam(value = "Query parameter enum test (string)", allowableValues = "_abc, -efg, (xyz)", defaultValue = "-efg") @Valid @RequestParam(value = "enum_query_string", required = false, defaultValue = "-efg") String enumQueryString,
         @ApiParam(value = "Query parameter enum test (double)", allowableValues = "1, -2") @Valid @RequestParam(value = "enum_query_integer", required = false) Integer enumQueryInteger,
         @ApiParam(value = "Query parameter enum test (double)", allowableValues = "1.1, -1.2") @Valid @RequestParam(value = "enum_query_double", required = false) Double enumQueryDouble,
-        @ApiParam(value = "Form parameter enum test (string array)", allowableValues = ">, $") @Valid @RequestParam(value = "enum_form_string_array", required = false) List<String> enumFormStringArray,
+        @ApiParam(value = "Form parameter enum test (string array)", allowableValues = ">, $", defaultValue = "$") @Valid @RequestParam(value = "enum_form_string_array", required = false) List<String> enumFormStringArray,
         @ApiParam(value = "Form parameter enum test (string)", allowableValues = "_abc, -efg, (xyz)", defaultValue = "-efg") @Valid @RequestParam(value = "enum_form_string", required = false) String enumFormString
     ) {
         return getDelegate().testEnumParameters(enumHeaderStringArray, enumHeaderString, enumQueryStringArray, enumQueryString, enumQueryInteger, enumQueryDouble, enumFormStringArray, enumFormString);

samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/FakeApi.java

@@ -395,7 +395,7 @@ default ResponseEntity<Void> testEnumParameters(
         @ApiParam(value = "Query parameter enum test (string)", allowableValues = "_abc, -efg, (xyz)", defaultValue = "-efg") @Valid @RequestParam(value = "enum_query_string", required = false, defaultValue = "-efg") String enumQueryString,
         @ApiParam(value = "Query parameter enum test (double)", allowableValues = "1, -2") @Valid @RequestParam(value = "enum_query_integer", required = false) Integer enumQueryInteger,
         @ApiParam(value = "Query parameter enum test (double)", allowableValues = "1.1, -1.2") @Valid @RequestParam(value = "enum_query_double", required = false) Double enumQueryDouble,
-        @ApiParam(value = "Form parameter enum test (string array)", allowableValues = ">, $") @Valid @RequestParam(value = "enum_form_string_array", required = false) List<String> enumFormStringArray,
+        @ApiParam(value = "Form parameter enum test (string array)", allowableValues = ">, $", defaultValue = "$") @Valid @RequestParam(value = "enum_form_string_array", required = false) List<String> enumFormStringArray,
         @ApiParam(value = "Form parameter enum test (string)", allowableValues = "_abc, -efg, (xyz)", defaultValue = "-efg") @Valid @RequestParam(value = "enum_form_string", required = false) String enumFormString
     ) {
         return new ResponseEntity<>(HttpStatus.NOT_IMPLEMENTED);

samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/FakeApi.java

@@ -378,7 +378,7 @@ default Mono<ResponseEntity<Void>> testEnumParameters(
         @ApiParam(value = "Query parameter enum test (string)", allowableValues = "_abc, -efg, (xyz)", defaultValue = "-efg") @Valid @RequestParam(value = "enum_query_string", required = false, defaultValue = "-efg") String enumQueryString,
         @ApiParam(value = "Query parameter enum test (double)", allowableValues = "1, -2") @Valid @RequestParam(value = "enum_query_integer", required = false) Integer enumQueryInteger,
         @ApiParam(value = "Query parameter enum test (double)", allowableValues = "1.1, -1.2") @Valid @RequestParam(value = "enum_query_double", required = false) Double enumQueryDouble,
-        @ApiParam(value = "Form parameter enum test (string array)", allowableValues = ">, $") @Valid @RequestParam(value = "enum_form_string_array", required = false) List<String> enumFormStringArray,
+        @ApiParam(value = "Form parameter enum test (string array)", allowableValues = ">, $", defaultValue = "$") @Valid @RequestParam(value = "enum_form_string_array", required = false) List<String> enumFormStringArray,
         @ApiParam(value = "Form parameter enum test (string)", allowableValues = "_abc, -efg, (xyz)", defaultValue = "-efg") @Valid @RequestParam(value = "enum_form_string", required = false) String enumFormString,
         @ApiIgnore final ServerWebExchange exchange
     ) {