feat: Add PersonGeneration to ImageConfig for Vertex Gempix

PiperOrigin-RevId: 845492961

Author: matthew29tang

src/main/java/com/google/genai/Batches.java

@@ -1400,6 +1400,11 @@ ObjectNode imageConfigToMldev(JsonNode fromObject, ObjectNode parentObject) {
           Common.getValueByPath(fromObject, new String[] {"imageSize"}));
     }
 
+    if (!Common.isZero(Common.getValueByPath(fromObject, new String[] {"personGeneration"}))) {
+      throw new IllegalArgumentException(
+          "personGeneration parameter is not supported in Gemini API.");
+    }
+
     if (!Common.isZero(Common.getValueByPath(fromObject, new String[] {"outputMimeType"}))) {
       throw new IllegalArgumentException(
           "outputMimeType parameter is not supported in Gemini API.");

src/main/java/com/google/genai/Models.java

@@ -3111,6 +3111,11 @@ ObjectNode imageConfigToMldev(JsonNode fromObject, ObjectNode parentObject) {
           Common.getValueByPath(fromObject, new String[] {"imageSize"}));
     }
 
+    if (!Common.isZero(Common.getValueByPath(fromObject, new String[] {"personGeneration"}))) {
+      throw new IllegalArgumentException(
+          "personGeneration parameter is not supported in Gemini API.");
+    }
+
     if (!Common.isZero(Common.getValueByPath(fromObject, new String[] {"outputMimeType"}))) {
       throw new IllegalArgumentException(
           "outputMimeType parameter is not supported in Gemini API.");
@@ -3142,6 +3147,13 @@ ObjectNode imageConfigToVertex(JsonNode fromObject, ObjectNode parentObject) {
           Common.getValueByPath(fromObject, new String[] {"imageSize"}));
     }
 
+    if (Common.getValueByPath(fromObject, new String[] {"personGeneration"}) != null) {
+      Common.setValueByPath(
+          toObject,
+          new String[] {"personGeneration"},
+          Common.getValueByPath(fromObject, new String[] {"personGeneration"}));
+    }
+
     if (Common.getValueByPath(fromObject, new String[] {"outputMimeType"}) != null) {
       Common.setValueByPath(
           toObject,

src/main/java/com/google/genai/types/ImageConfig.java

@@ -44,6 +44,12 @@ public abstract class ImageConfig extends JsonSerializable {
   @JsonProperty("imageSize")
   public abstract Optional<String> imageSize();
 
+  /**
+   * Controls the generation of people. Supported values are: ALLOW_ALL, ALLOW_ADULT, ALLOW_NONE.
+   */
+  @JsonProperty("personGeneration")
+  public abstract Optional<String> personGeneration();
+
   /** MIME type of the generated image. This field is not supported in Gemini API. */
   @JsonProperty("outputMimeType")
   public abstract Optional<String> outputMimeType();
@@ -111,6 +117,25 @@ public Builder clearImageSize() {
       return imageSize(Optional.empty());
     }
 
+    /**
+     * Setter for personGeneration.
+     *
+     * <p>personGeneration: Controls the generation of people. Supported values are: ALLOW_ALL,
+     * ALLOW_ADULT, ALLOW_NONE.
+     */
+    @JsonProperty("personGeneration")
+    public abstract Builder personGeneration(String personGeneration);
+
+    @ExcludeFromGeneratedCoverageReport
+    abstract Builder personGeneration(Optional<String> personGeneration);
+
+    /** Clears the value of personGeneration field. */
+    @ExcludeFromGeneratedCoverageReport
+    @CanIgnoreReturnValue
+    public Builder clearPersonGeneration() {
+      return personGeneration(Optional.empty());
+    }
+
     /**
      * Setter for outputMimeType.
      *