feat(google genai): support sending labels with chat request

Signed-off-by: Gareth Evans <[email protected]>

Fix checkstyle

Signed-off-by: Soby Chacko <[email protected]>

Author: garethjevans

models/spring-ai-google-genai/src/main/java/org/springframework/ai/google/genai/GoogleGenAiChatModel.java

@@ -479,6 +479,8 @@ Prompt buildRequestPrompt(Prompt prompt) {
 					runtimeOptions.getGoogleSearchRetrieval(), this.defaultOptions.getGoogleSearchRetrieval()));
 			requestOptions.setSafetySettings(ModelOptionsUtils.mergeOption(runtimeOptions.getSafetySettings(),
 					this.defaultOptions.getSafetySettings()));
+			requestOptions
+				.setLabels(ModelOptionsUtils.mergeOption(runtimeOptions.getLabels(), this.defaultOptions.getLabels()));
 		}
 		else {
 			requestOptions.setInternalToolExecutionEnabled(this.defaultOptions.getInternalToolExecutionEnabled());
@@ -488,6 +490,7 @@ Prompt buildRequestPrompt(Prompt prompt) {
 
 			requestOptions.setGoogleSearchRetrieval(this.defaultOptions.getGoogleSearchRetrieval());
 			requestOptions.setSafetySettings(this.defaultOptions.getSafetySettings());
+			requestOptions.setLabels(this.defaultOptions.getLabels());
 		}
 
 		ToolCallingChatOptions.validateToolCallbacks(requestOptions.getToolCallbacks());
@@ -680,6 +683,9 @@ GeminiRequest createGeminiRequest(Prompt prompt) {
 			configBuilder
 				.thinkingConfig(ThinkingConfig.builder().thinkingBudget(requestOptions.getThinkingBudget()).build());
 		}
+		if (requestOptions.getLabels() != null && !requestOptions.getLabels().isEmpty()) {
+			configBuilder.labels(requestOptions.getLabels());
+		}
 
 		// Add safety settings
 		if (!CollectionUtils.isEmpty(requestOptions.getSafetySettings())) {

models/spring-ai-google-genai/src/main/java/org/springframework/ai/google/genai/GoogleGenAiChatOptions.java

@@ -144,6 +144,9 @@ public class GoogleGenAiChatOptions implements ToolCallingChatOptions {
 
 	@JsonIgnore
 	private List<GoogleGenAiSafetySetting> safetySettings = new ArrayList<>();
+
+	@JsonIgnore
+	private Map<String, String> labels = new HashMap<>();
 	// @formatter:on
 
 	public static Builder builder() {
@@ -170,6 +173,7 @@ public static GoogleGenAiChatOptions fromOptions(GoogleGenAiChatOptions fromOpti
 		options.setInternalToolExecutionEnabled(fromOptions.getInternalToolExecutionEnabled());
 		options.setToolContext(fromOptions.getToolContext());
 		options.setThinkingBudget(fromOptions.getThinkingBudget());
+		options.setLabels(fromOptions.getLabels());
 		return options;
 	}
 
@@ -332,6 +336,15 @@ public void setSafetySettings(List<GoogleGenAiSafetySetting> safetySettings) {
 		this.safetySettings = safetySettings;
 	}
 
+	public Map<String, String> getLabels() {
+		return this.labels;
+	}
+
+	public void setLabels(Map<String, String> labels) {
+		Assert.notNull(labels, "labels must not be null");
+		this.labels = labels;
+	}
+
 	@Override
 	public Map<String, Object> getToolContext() {
 		return this.toolContext;
@@ -363,15 +376,15 @@ public boolean equals(Object o) {
 				&& Objects.equals(this.toolNames, that.toolNames)
 				&& Objects.equals(this.safetySettings, that.safetySettings)
 				&& Objects.equals(this.internalToolExecutionEnabled, that.internalToolExecutionEnabled)
-				&& Objects.equals(this.toolContext, that.toolContext);
+				&& Objects.equals(this.toolContext, that.toolContext) && Objects.equals(this.labels, that.labels);
 	}
 
 	@Override
 	public int hashCode() {
 		return Objects.hash(this.stopSequences, this.temperature, this.topP, this.topK, this.candidateCount,
 				this.frequencyPenalty, this.presencePenalty, this.thinkingBudget, this.maxOutputTokens, this.model,
 				this.responseMimeType, this.toolCallbacks, this.toolNames, this.googleSearchRetrieval,
-				this.safetySettings, this.internalToolExecutionEnabled, this.toolContext);
+				this.safetySettings, this.internalToolExecutionEnabled, this.toolContext, this.labels);
 	}
 
 	@Override
@@ -382,7 +395,8 @@ public String toString() {
 				+ ", candidateCount=" + this.candidateCount + ", maxOutputTokens=" + this.maxOutputTokens + ", model='"
 				+ this.model + '\'' + ", responseMimeType='" + this.responseMimeType + '\'' + ", toolCallbacks="
 				+ this.toolCallbacks + ", toolNames=" + this.toolNames + ", googleSearchRetrieval="
-				+ this.googleSearchRetrieval + ", safetySettings=" + this.safetySettings + '}';
+				+ this.googleSearchRetrieval + ", safetySettings=" + this.safetySettings + ", labels=" + this.labels
+				+ '}';
 	}
 
 	@Override
@@ -510,6 +524,12 @@ public Builder thinkingBudget(Integer thinkingBudget) {
 			return this;
 		}
 
+		public Builder labels(Map<String, String> labels) {
+			Assert.notNull(labels, "labels must not be null");
+			this.options.labels = labels;
+			return this;
+		}
+
 		public GoogleGenAiChatOptions build() {
 			return this.options;
 		}

models/spring-ai-google-genai/src/test/java/org/springframework/ai/google/genai/GoogleGenAiChatOptionsTest.java

@@ -16,6 +16,8 @@
 
 package org.springframework.ai.google.genai;
 
+import java.util.Map;
+
 import org.junit.jupiter.api.Test;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -104,6 +106,29 @@ public void testEqualsAndHashCodeWithThinkingBudget() {
 		assertThat(options1.hashCode()).isNotEqualTo(options3.hashCode());
 	}
 
+	@Test
+	public void testEqualsAndHashCodeWithLabels() {
+		GoogleGenAiChatOptions options1 = GoogleGenAiChatOptions.builder()
+			.model("test-model")
+			.labels(Map.of("org", "my-org"))
+			.build();
+
+		GoogleGenAiChatOptions options2 = GoogleGenAiChatOptions.builder()
+			.model("test-model")
+			.labels(Map.of("org", "my-org"))
+			.build();
+
+		GoogleGenAiChatOptions options3 = GoogleGenAiChatOptions.builder()
+			.model("test-model")
+			.labels(Map.of("org", "other-org"))
+			.build();
+
+		assertThat(options1).isEqualTo(options2);
+		assertThat(options1.hashCode()).isEqualTo(options2.hashCode());
+		assertThat(options1).isNotEqualTo(options3);
+		assertThat(options1.hashCode()).isNotEqualTo(options3.hashCode());
+	}
+
 	@Test
 	public void testToStringWithThinkingBudget() {
 		GoogleGenAiChatOptions options = GoogleGenAiChatOptions.builder()
@@ -116,4 +141,16 @@ public void testToStringWithThinkingBudget() {
 		assertThat(toString).contains("test-model");
 	}
 
+	@Test
+	public void testToStringWithLabels() {
+		GoogleGenAiChatOptions options = GoogleGenAiChatOptions.builder()
+			.model("test-model")
+			.labels(Map.of("org", "my-org"))
+			.build();
+
+		String toString = options.toString();
+		assertThat(toString).contains("labels={org=my-org}");
+		assertThat(toString).contains("test-model");
+	}
+
 }