feat(http-client-java): expose required-fields-as-ctor-args option to tspconfig

.chronus/changes/expose-required-fields-as-ctor-args-2026-7-24-10-11-0.md

@@ -0,0 +1,13 @@
+---
+changeKind: feature
+packages:
+  - "@typespec/http-client-java"
+---
+
+Expose the `required-fields-as-ctor-args` emitter option in `tspconfig.yaml`. It controls whether required model properties are generated as constructor arguments. The default remains `true`.
+
+```yaml
+options:
+  "@typespec/http-client-java":
+    required-fields-as-ctor-args: false
+```

packages/http-client-java/emitter/src/code-model-builder.ts

@@ -203,6 +203,7 @@ export interface EmitterOptionsDev {
   "enable-subclient"?: boolean;
 
   // not recommended to set
+  "required-fields-as-ctor-args"?: boolean;
   "group-etag-headers"?: boolean;
   "enable-sync-stack"?: boolean;
   "stream-style-serialization"?: boolean;

packages/http-client-java/generator/http-client-generator/src/main/java/com/microsoft/typespec/http/client/generator/TypeSpecPlugin.java

@@ -224,6 +224,9 @@ public TypeSpecPlugin(EmitterOptions options, boolean sdkIntegration) {
         if (options.getPartialUpdate() != null) {
             SETTINGS_MAP.put("partial-update", options.getPartialUpdate());
         }
+        if (options.getRequiredFieldsAsConstructorArgs() != null) {
+            SETTINGS_MAP.put("required-fields-as-ctor-args", options.getRequiredFieldsAsConstructorArgs());
+        }
         if (!CoreUtils.isNullOrEmpty(options.getServiceVersions())) {
             SETTINGS_MAP.put("service-versions", options.getServiceVersions());
         }

packages/http-client-java/generator/http-client-generator/src/main/java/com/microsoft/typespec/http/client/generator/model/EmitterOptions.java

@@ -28,6 +28,7 @@ public class EmitterOptions implements JsonSerializable<EmitterOptions> {
     private Boolean enableSyncStack = true;
     private Boolean streamStyleSerialization = true;
     private Boolean partialUpdate;
+    private Boolean requiredFieldsAsConstructorArgs;
     private String customTypes;
     private String customTypeSubpackage;
     private String customizationClass;
@@ -85,6 +86,10 @@ public Boolean getPartialUpdate() {
         return partialUpdate;
     }
 
+    public Boolean getRequiredFieldsAsConstructorArgs() {
+        return requiredFieldsAsConstructorArgs;
+    }
+
     public Boolean getGenerateTests() {
         return generateTests;
     }
@@ -237,6 +242,8 @@ public static EmitterOptions fromJson(JsonReader jsonReader) throws IOException
                 options.streamStyleSerialization = reader.getNullable(EmitterOptions::getBoolean);
             } else if ("partial-update".equals(fieldName)) {
                 options.partialUpdate = reader.getNullable(EmitterOptions::getBoolean);
+            } else if ("required-fields-as-ctor-args".equals(fieldName)) {
+                options.requiredFieldsAsConstructorArgs = reader.getNullable(EmitterOptions::getBoolean);
             } else if ("custom-types".equals(fieldName)) {
                 options.customTypes = emptyToNull(reader.getString());
             } else if ("custom-types-subpackage".equals(fieldName)) {