[java][doc] Fix Makdown examples: wrong collection type used to initialize Sets (#23160)

* Fix markdown example generation: Arrays.asList() was used to instanciate Sets without checking 'uniqueItems'

* Update generated samples

Author: robinmarechal

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

@@ -1769,8 +1769,16 @@ public void setParameterExampleValue(CodegenParameter p) {
                     innerExample = p.items.defaultValue;
                 }
                 example = "Arrays.asList(" + innerExample + ")";
+                if (p.uniqueItems) {
+                    example = "new LinkedHashSet<>(" + example + ")";
+                }
             } else {
-                example = "Arrays.asList()";
+                if (p.uniqueItems) {
+                    example = "new LinkedHashSet<>()";
+                }
+                else {
+                    example = "Arrays.asList()";
+                }
             }
         } else if (Boolean.TRUE.equals(p.isMap)) {
             example = "new HashMap()";

samples/client/petstore/java-helidon-client/v3/se/docs/PetApi.md

@@ -261,7 +261,7 @@ public class Example {
         petstore_auth.setAccessToken("YOUR ACCESS TOKEN");
 
         PetApi apiInstance = new PetApi(defaultClient);
-        Set<String> tags = Arrays.asList(); // Set<String> | Tags to filter by
+        Set<String> tags = new LinkedHashSet<>(); // Set<String> | Tags to filter by
         try {
             Set<Pet> result = apiInstance.findPetsByTags(tags);
             System.out.println(result);

samples/client/petstore/java-helidon-client/v4/se/docs/PetApi.md

@@ -261,7 +261,7 @@ public class Example {
         petstore_auth.setAccessToken("YOUR ACCESS TOKEN");
 
         PetApi apiInstance = new PetApi(defaultClient);
-        Set<String> tags = Arrays.asList(); // Set<String> | Tags to filter by
+        Set<String> tags = new LinkedHashSet<>(); // Set<String> | Tags to filter by
         try {
             Set<Pet> result = apiInstance.findPetsByTags(tags);
             System.out.println(result);

samples/client/petstore/java/apache-httpclient/docs/PetApi.md

@@ -261,7 +261,7 @@ public class Example {
         petstore_auth.setAccessToken("YOUR ACCESS TOKEN");
 
         PetApi apiInstance = new PetApi(defaultClient);
-        Set<String> tags = Arrays.asList(); // Set<String> | Tags to filter by
+        Set<String> tags = new LinkedHashSet<>(); // Set<String> | Tags to filter by
         try {
             Set<Pet> result = apiInstance.findPetsByTags(tags);
             System.out.println(result);

samples/client/petstore/java/google-api-client/docs/PetApi.md

@@ -257,7 +257,7 @@ public class Example {
         petstore_auth.setAccessToken("YOUR ACCESS TOKEN");
 
         PetApi apiInstance = new PetApi(defaultClient);
-        Set<String> tags = Arrays.asList(); // Set<String> | Tags to filter by
+        Set<String> tags = new LinkedHashSet<>(); // Set<String> | Tags to filter by
         try {
             Set<Pet> result = apiInstance.findPetsByTags(tags);
             System.out.println(result);

samples/client/petstore/java/jersey2-java8-localdatetime/docs/PetApi.md

@@ -254,7 +254,7 @@ public class Example {
         petstore_auth.setAccessToken("YOUR ACCESS TOKEN");
 
         PetApi apiInstance = new PetApi(defaultClient);
-        Set<String> tags = Arrays.asList(); // Set<String> | Tags to filter by
+        Set<String> tags = new LinkedHashSet<>(); // Set<String> | Tags to filter by
         try {
             Set<Pet> result = apiInstance.findPetsByTags(tags);
             System.out.println(result);

samples/client/petstore/java/jersey2-java8/docs/PetApi.md

@@ -254,7 +254,7 @@ public class Example {
         petstore_auth.setAccessToken("YOUR ACCESS TOKEN");
 
         PetApi apiInstance = new PetApi(defaultClient);
-        Set<String> tags = Arrays.asList(); // Set<String> | Tags to filter by
+        Set<String> tags = new LinkedHashSet<>(); // Set<String> | Tags to filter by
         try {
             Set<Pet> result = apiInstance.findPetsByTags(tags);
             System.out.println(result);

samples/client/petstore/java/microprofile-rest-client-3.0-jackson/docs/PetApi.md

@@ -263,7 +263,7 @@ public class Example {
         petstore_auth.setAccessToken("YOUR ACCESS TOKEN");
 
         PetApi apiInstance = new PetApi(defaultClient);
-        Set<String> tags = Arrays.asList(); // Set<String> | Tags to filter by
+        Set<String> tags = new LinkedHashSet<>(); // Set<String> | Tags to filter by
         try {
             Set<Pet> result = apiInstance.findPetsByTags(tags);
             System.out.println(result);

samples/client/petstore/java/microprofile-rest-client-3.0/docs/PetApi.md

@@ -263,7 +263,7 @@ public class Example {
         petstore_auth.setAccessToken("YOUR ACCESS TOKEN");
 
         PetApi apiInstance = new PetApi(defaultClient);
-        Set<String> tags = Arrays.asList(); // Set<String> | Tags to filter by
+        Set<String> tags = new LinkedHashSet<>(); // Set<String> | Tags to filter by
         try {
             Set<Pet> result = apiInstance.findPetsByTags(tags);
             System.out.println(result);

samples/client/petstore/java/microprofile-rest-client/docs/PetApi.md

@@ -263,7 +263,7 @@ public class Example {
         petstore_auth.setAccessToken("YOUR ACCESS TOKEN");
 
         PetApi apiInstance = new PetApi(defaultClient);
-        Set<String> tags = Arrays.asList(); // Set<String> | Tags to filter by
+        Set<String> tags = new LinkedHashSet<>(); // Set<String> | Tags to filter by
         try {
             Set<Pet> result = apiInstance.findPetsByTags(tags);
             System.out.println(result);