Fixing miscellaneous checkstyle errors

Enabling checkstyle by default in the project build

Signed-off-by: Soby Chacko <soby.chacko@broadcom.com>

Author: sobychacko

advisors/spring-ai-advisors-vector-store/src/main/java/org/springframework/ai/chat/client/advisor/vectorstore/QuestionAnswerAdvisor.java

@@ -21,14 +21,14 @@
 import java.util.Map;
 import java.util.stream.Collectors;
 
+import reactor.core.scheduler.Scheduler;
+import reactor.core.scheduler.Schedulers;
+
 import org.springframework.ai.chat.client.ChatClientRequest;
 import org.springframework.ai.chat.client.ChatClientResponse;
 import org.springframework.ai.chat.client.advisor.api.AdvisorChain;
 import org.springframework.ai.chat.client.advisor.api.BaseAdvisor;
 import org.springframework.ai.chat.messages.UserMessage;
-import reactor.core.scheduler.Scheduler;
-import reactor.core.scheduler.Schedulers;
-
 import org.springframework.ai.chat.model.ChatResponse;
 import org.springframework.ai.chat.prompt.PromptTemplate;
 import org.springframework.ai.document.Document;

advisors/spring-ai-advisors-vector-store/src/main/java/org/springframework/ai/chat/client/advisor/vectorstore/VectorStoreChatMemoryAdvisor.java

@@ -21,7 +21,6 @@
 import java.util.List;
 import java.util.Map;
 
-import org.springframework.util.Assert;
 import reactor.core.scheduler.Scheduler;
 
 import org.springframework.ai.chat.client.ChatClientRequest;
@@ -38,6 +37,7 @@
 import org.springframework.ai.chat.prompt.PromptTemplate;
 import org.springframework.ai.document.Document;
 import org.springframework.ai.vectorstore.VectorStore;
+import org.springframework.util.Assert;
 
 /**
  * Memory is retrieved from a VectorStore added into the prompt's system text.
@@ -50,7 +50,7 @@
  * @author Mark Pollack
  * @since 1.0.0
  */
-public class VectorStoreChatMemoryAdvisor implements BaseChatMemoryAdvisor {
+public final class VectorStoreChatMemoryAdvisor implements BaseChatMemoryAdvisor {
 
 	public static final String TOP_K = "chat_memory_vector_store_top_k";
 
@@ -104,7 +104,7 @@ public static Builder builder(VectorStore chatMemory) {
 
 	@Override
 	public int getOrder() {
-		return order;
+		return this.order;
 	}
 
 	@Override

advisors/spring-ai-advisors-vector-store/src/test/java/org/springframework/ai/chat/client/advisor/vectorstore/VectorStoreChatMemoryAdvisorTests.java

@@ -1,7 +1,24 @@
+/*
+ * Copyright 2025-2025 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package org.springframework.ai.chat.client.advisor.vectorstore;
 
 import org.junit.jupiter.api.Test;
 import org.mockito.Mockito;
+
 import org.springframework.ai.vectorstore.VectorStore;
 
 import static org.assertj.core.api.Assertions.assertThatThrownBy;

auto-configurations/mcp/spring-ai-autoconfigure-mcp-client/src/main/java/org/springframework/ai/mcp/client/autoconfigure/properties/McpClientCommonProperties.java

@@ -109,33 +109,6 @@ public enum ClientType {
 	 */
 	private Toolcallback toolcallback = new Toolcallback();
 
-	/**
-	 * Represents a callback configuration for tools.
-	 * <p>
-	 * This record is used to encapsulate the configuration for enabling or disabling tool
-	 * callbacks in the MCP client.
-	 *
-	 * @param enabled A boolean flag indicating whether the tool callback is enabled. If
-	 * true, the tool callback is active; otherwise, it is disabled.
-	 */
-	public static class Toolcallback {
-
-		/**
-		 * A boolean flag indicating whether the tool callback is enabled. If true, the
-		 * tool callback is active; otherwise, it is disabled.
-		 */
-		private boolean enabled = true;
-
-		public void setEnabled(boolean enabled) {
-			this.enabled = enabled;
-		}
-
-		public boolean isEnabled() {
-			return this.enabled;
-		}
-
-	}
-
 	public boolean isEnabled() {
 		return this.enabled;
 	}
@@ -193,11 +166,38 @@ public void setRootChangeNotification(boolean rootChangeNotification) {
 	}
 
 	public Toolcallback getToolcallback() {
-		return toolcallback;
+		return this.toolcallback;
 	}
 
 	public void setToolcallback(Toolcallback toolcallback) {
 		this.toolcallback = toolcallback;
 	}
 
+	/**
+	 * Represents a callback configuration for tools.
+	 * <p>
+	 * This record is used to encapsulate the configuration for enabling or disabling tool
+	 * callbacks in the MCP client.
+	 *
+	 * @param enabled A boolean flag indicating whether the tool callback is enabled. If
+	 * true, the tool callback is active; otherwise, it is disabled.
+	 */
+	public static class Toolcallback {
+
+		/**
+		 * A boolean flag indicating whether the tool callback is enabled. If true, the
+		 * tool callback is active; otherwise, it is disabled.
+		 */
+		private boolean enabled = true;
+
+		public void setEnabled(boolean enabled) {
+			this.enabled = enabled;
+		}
+
+		public boolean isEnabled() {
+			return this.enabled;
+		}
+
+	}
+
 }

auto-configurations/mcp/spring-ai-autoconfigure-mcp-client/src/test/java/org/springframework/ai/mcp/client/autoconfigure/properties/McpClientCommonPropertiesTests.java

@@ -16,13 +16,14 @@
 
 package org.springframework.ai.mcp.client.autoconfigure.properties;
 
+import java.time.Duration;
+
 import org.junit.jupiter.api.Test;
+
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.context.annotation.Configuration;
 
-import java.time.Duration;
-
 import static org.assertj.core.api.Assertions.assertThat;
 
 /**

auto-configurations/mcp/spring-ai-autoconfigure-mcp-client/src/test/java/org/springframework/ai/mcp/client/autoconfigure/properties/McpSseClientPropertiesTests.java

@@ -16,13 +16,14 @@
 
 package org.springframework.ai.mcp.client.autoconfigure.properties;
 
+import java.util.Map;
+
 import org.junit.jupiter.api.Test;
+
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.context.annotation.Configuration;
 
-import java.util.Map;
-
 import static org.assertj.core.api.Assertions.assertThat;
 
 /**

auto-configurations/mcp/spring-ai-autoconfigure-mcp-server/src/main/java/org/springframework/ai/mcp/server/autoconfigure/McpServerAutoConfiguration.java

@@ -351,4 +351,4 @@ public McpAsyncServer mcpAsyncServer(McpServerTransportProvider transportProvide
 		return serverBuilder.build();
 	}
 
-}
+}

auto-configurations/mcp/spring-ai-autoconfigure-mcp-server/src/test/java/org/springframework/ai/mcp/server/autoconfigure/McpWebFluxServerAutoConfigurationTests.java

@@ -13,20 +13,21 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.springframework.ai.mcp.server.autoconfigure;
 
-import static org.assertj.core.api.Assertions.assertThat;
+package org.springframework.ai.mcp.server.autoconfigure;
 
+import com.fasterxml.jackson.databind.ObjectMapper;
+import io.modelcontextprotocol.server.transport.WebFluxSseServerTransportProvider;
 import org.junit.jupiter.api.Test;
+
 import org.springframework.boot.autoconfigure.AutoConfigurations;
 import org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.web.reactive.function.server.RouterFunction;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
-import io.modelcontextprotocol.server.transport.WebFluxSseServerTransportProvider;
+import static org.assertj.core.api.Assertions.assertThat;
 
 class McpWebFluxServerAutoConfigurationTests {
 
@@ -36,7 +37,7 @@ class McpWebFluxServerAutoConfigurationTests {
 
 	@Test
 	void shouldConfigureWebFluxTransportWithCustomObjectMapper() {
-		this.contextRunner.run((context) -> {
+		this.contextRunner.run(context -> {
 			assertThat(context).hasSingleBean(WebFluxSseServerTransportProvider.class);
 			assertThat(context).hasSingleBean(RouterFunction.class);
 			assertThat(context).hasSingleBean(McpServerProperties.class);
@@ -48,13 +49,15 @@ void shouldConfigureWebFluxTransportWithCustomObjectMapper() {
 				.isEnabled(com.fasterxml.jackson.databind.DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES)).isFalse();
 
 			// Test with a JSON payload containing unknown fields
+			// CHECKSTYLE:OFF
 			String jsonWithUnknownField = """
 					{
 					    "tools": ["tool1", "tool2"],
 					    "name": "test",
 					    "unknownField": "value"
 					}
 					""";
+			// CHECKSTYLE:ON
 
 			// This should not throw an exception
 			TestMessage message = objectMapper.readValue(jsonWithUnknownField, TestMessage.class);
@@ -75,7 +78,7 @@ static class TestMessage {
 		private String name;
 
 		public String getName() {
-			return name;
+			return this.name;
 		}
 
 		public void setName(String name) {

auto-configurations/models/chat/client/spring-ai-autoconfigure-model-chat-client/src/main/java/org/springframework/ai/model/chat/client/autoconfigure/ChatClientAutoConfiguration.java

@@ -20,6 +20,7 @@
 import io.micrometer.tracing.Tracer;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+
 import org.springframework.ai.chat.client.ChatClient;
 import org.springframework.ai.chat.client.ChatClientCustomizer;
 import org.springframework.ai.chat.client.observation.ChatClientObservationContext;
@@ -30,7 +31,11 @@
 import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.boot.autoconfigure.AutoConfiguration;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
-import org.springframework.boot.autoconfigure.condition.*;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;

auto-configurations/models/chat/client/spring-ai-autoconfigure-model-chat-client/src/test/java/org/springframework/ai/model/chat/client/autoconfigure/ChatClientObservationAutoConfigurationTests.java

@@ -19,6 +19,7 @@
 import io.micrometer.tracing.Tracer;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
+
 import org.springframework.ai.chat.client.observation.ChatClientObservationContext;
 import org.springframework.ai.chat.client.observation.ChatClientPromptContentObservationHandler;
 import org.springframework.ai.observation.TracingAwareLoggingObservationHandler;