fix(generator): OpenAPI generator issues with Petstore example

element-template-generator/congen-cli/README.md

@@ -48,12 +48,21 @@ Note that `congen` will pass all parameters specified after the command name to
 For example, the OpenAPI generator accepts the path or URL of the OpenAPI specification as the first parameter,
 followed by an optional list of operation IDs to include in the generated template.
 
-The following command will ask the generator to include only the `findPetsById` and `addPet` operations.
+The following command will ask the generator to include only the `placeOrder` operation.
 
 ```shell
-congen generate openapi-outbound https://petstore3.swagger.io/api/v3/openapi.json findPetsById addPet
+congen generate openapi-outbound https://petstore3.swagger.io/api/v3/openapi.json placeOrder
 ```
 
+Note that not all operations in the OpenAPI specification can be converted to a template. The generator will
+ignore operations that cannot be converted. To see the list of operations that can be converted, use the `scan` command.
+
+```shell
+congen scan openapi-outbound https://petstore3.swagger.io/api/v3/openapi.json
+```
+
+```shell
+
 The command below will generate the template with the custom element template ID.
 
 ```shell

element-template-generator/congen-cli/src/main/java/io/camunda/connector/generator/cli/command/Generate.java

@@ -70,7 +70,12 @@ public Integer call() {
       return GENERATION_FAILED.getCode();
     }
     try {
-      var resultString = mapper.writerWithDefaultPrettyPrinter().writeValueAsString(templates);
+      String resultString;
+      if (templates.size() == 1) {
+        resultString = mapper.writeValueAsString(templates.getFirst());
+      } else {
+        resultString = mapper.writerWithDefaultPrettyPrinter().writeValueAsString(templates);
+      }
       System.out.println(resultString);
       return SUCCESS.getCode();
     } catch (JsonProcessingException e) {

element-template-generator/http-dsl/src/main/java/io/camunda/connector/generator/dsl/http/PropertyUtil.java

@@ -67,7 +67,7 @@ static PropertyBuilder authDiscriminatorPropertyPrefab(
         .label("Authentication")
         .optional(false)
         .binding(new ZeebeInput("authentication.type"))
-        .value(choices.get(0).value());
+        .value(choices.getFirst().value());
   }
 
   static PropertyGroup operationDiscriminatorPropertyGroup(Collection<HttpOperation> operations) {
@@ -327,7 +327,7 @@ private static Property transformProperty(
 
     // shade property id with operation id as there may be duplicates in different operations
     builder
-        .id(operationId + "_" + property.id())
+        .id(operationId + "_" + property.target().name().toLowerCase() + "_" + property.id())
         .label(TemplatePropertiesUtil.transformIdIntoLabel(property.id()))
         .description(property.description())
         .optional(!property.required())
@@ -356,7 +356,7 @@ static PropertyGroup requestBodyPropertyGroup(Collection<HttpOperation> operatio
               .map(p -> transformProperty(operation.id(), p, "requestBody"))
               .toList();
 
-      Property bodyAggregationProperty = null;
+      Property bodyAggregationProperty;
       if (bodyProperties.isEmpty()) {
         bodyAggregationProperty =
             StringProperty.builder()

element-template-generator/openapi-parser/src/main/java/io/camunda/connector/generator/openapi/util/OperationUtil.java

@@ -112,7 +112,6 @@ public static List<OperationParseResult> extractOperations(
                   });
               return operations.stream();
             })
-        .filter(OperationParseResult::supported)
         .filter(
             operation ->
                 includeOperations == null
@@ -138,7 +137,7 @@ private static OperationParseResult extractOperation(
       var authenticationOverride = parseAuthentication(operation.getSecurity(), components);
 
       var body = BodyUtil.parseBody(operation.getRequestBody(), components, options);
-      HttpFeelBuilder bodyFeelExpression = null;
+      HttpFeelBuilder bodyFeelExpression;
 
       if (body instanceof BodyParseResult.Raw raw) {
         bodyFeelExpression = HttpFeelBuilder.preFormatted("=" + raw.rawBody());