feat: Add enableEnhancedCivicAnswers feature in GenerateContentConfig

PiperOrigin-RevId: 836720742

Author: jaycee-li

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

@@ -1250,6 +1250,13 @@ ObjectNode generateContentConfigToMldev(
               toObject));
     }
 
+    if (Common.getValueByPath(fromObject, new String[] {"enableEnhancedCivicAnswers"}) != null) {
+      Common.setValueByPath(
+          toObject,
+          new String[] {"enableEnhancedCivicAnswers"},
+          Common.getValueByPath(fromObject, new String[] {"enableEnhancedCivicAnswers"}));
+    }
+
     return toObject;
   }
 

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

@@ -1372,6 +1372,13 @@ ObjectNode generateContentConfigToMldev(
               toObject));
     }
 
+    if (Common.getValueByPath(fromObject, new String[] {"enableEnhancedCivicAnswers"}) != null) {
+      Common.setValueByPath(
+          toObject,
+          new String[] {"enableEnhancedCivicAnswers"},
+          Common.getValueByPath(fromObject, new String[] {"enableEnhancedCivicAnswers"}));
+    }
+
     return toObject;
   }
 
@@ -1591,6 +1598,12 @@ ObjectNode generateContentConfigToVertex(
               toObject));
     }
 
+    if (!Common.isZero(
+        Common.getValueByPath(fromObject, new String[] {"enableEnhancedCivicAnswers"}))) {
+      throw new IllegalArgumentException(
+          "enableEnhancedCivicAnswers parameter is not supported in Vertex AI.");
+    }
+
     return toObject;
   }
 

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

@@ -223,6 +223,13 @@ public abstract class GenerateContentConfig extends JsonSerializable {
   @JsonProperty("imageConfig")
   public abstract Optional<ImageConfig> imageConfig();
 
+  /**
+   * Enables enhanced civic answers. It may not be available for all models. This field is not
+   * supported in Vertex AI.
+   */
+  @JsonProperty("enableEnhancedCivicAnswers")
+  public abstract Optional<Boolean> enableEnhancedCivicAnswers();
+
   /** Instantiates a builder for GenerateContentConfig. */
   @ExcludeFromGeneratedCoverageReport
   public static Builder builder() {
@@ -1032,6 +1039,25 @@ public Builder clearImageConfig() {
       return imageConfig(Optional.empty());
     }
 
+    /**
+     * Setter for enableEnhancedCivicAnswers.
+     *
+     * <p>enableEnhancedCivicAnswers: Enables enhanced civic answers. It may not be available for
+     * all models. This field is not supported in Vertex AI.
+     */
+    @JsonProperty("enableEnhancedCivicAnswers")
+    public abstract Builder enableEnhancedCivicAnswers(boolean enableEnhancedCivicAnswers);
+
+    @ExcludeFromGeneratedCoverageReport
+    abstract Builder enableEnhancedCivicAnswers(Optional<Boolean> enableEnhancedCivicAnswers);
+
+    /** Clears the value of enableEnhancedCivicAnswers field. */
+    @ExcludeFromGeneratedCoverageReport
+    @CanIgnoreReturnValue
+    public Builder clearEnableEnhancedCivicAnswers() {
+      return enableEnhancedCivicAnswers(Optional.empty());
+    }
+
     public abstract GenerateContentConfig build();
   }