GH-1599 Remove deprecations prior to M2

 - Remove deprecated types,methods and references
   - Remove usage of "Generation(String text)" and replace with "Generation(AssistantMessage)"
   - Remove MiniMaxApi,MootShotApi,OpenAiApi,ZhiPuAiApi ChatCompletionFinishReason's FUNCTION_CALL
   - Remove OllamaApi's deprecated types
   - Remove deprecated constructors from PostgresMlEmbeddingModel
   - Remove deprecated constructor from Media
   - Remove tokenNames usage from antlr4 FiltersLexer and FiltersParser
   - Remove deprecated methods from CassandraVectorStoreProperties
   - Remove deprecated constructor and static config class from QdrantVectorStore
   - Minor cleanups on removing deprecated models and versions

Resolves #1599

Author: ilayaperumalg

models/spring-ai-bedrock/src/main/java/org/springframework/ai/bedrock/anthropic/BedrockAnthropicChatModel.java

@@ -24,6 +24,7 @@
 import org.springframework.ai.bedrock.anthropic.api.AnthropicChatBedrockApi;
 import org.springframework.ai.bedrock.anthropic.api.AnthropicChatBedrockApi.AnthropicChatRequest;
 import org.springframework.ai.bedrock.anthropic.api.AnthropicChatBedrockApi.AnthropicChatResponse;
+import org.springframework.ai.chat.messages.AssistantMessage;
 import org.springframework.ai.chat.metadata.ChatGenerationMetadata;
 import org.springframework.ai.chat.model.ChatModel;
 import org.springframework.ai.chat.model.ChatResponse;
@@ -68,7 +69,7 @@ public ChatResponse call(Prompt prompt) {
 
 		AnthropicChatResponse response = this.anthropicChatApi.chatCompletion(request);
 
-		return new ChatResponse(List.of(new Generation(response.completion())));
+		return new ChatResponse(List.of(new Generation(new AssistantMessage(response.completion()))));
 	}
 
 	@Override
@@ -80,12 +81,13 @@ public Flux<ChatResponse> stream(Prompt prompt) {
 
 		return fluxResponse.map(response -> {
 			String stopReason = response.stopReason() != null ? response.stopReason() : null;
-			var generation = new Generation(response.completion());
+			ChatGenerationMetadata chatGenerationMetadata = null;
 			if (response.amazonBedrockInvocationMetrics() != null) {
-				generation = generation.withGenerationMetadata(
-						ChatGenerationMetadata.from(stopReason, response.amazonBedrockInvocationMetrics()));
+				chatGenerationMetadata = ChatGenerationMetadata.from(stopReason,
+						response.amazonBedrockInvocationMetrics());
 			}
-			return new ChatResponse(List.of(generation));
+			return new ChatResponse(
+					List.of(new Generation(new AssistantMessage(response.completion()), chatGenerationMetadata)));
 		});
 	}
 

models/spring-ai-bedrock/src/main/java/org/springframework/ai/bedrock/anthropic3/BedrockAnthropic3ChatModel.java

@@ -114,16 +114,13 @@ public Flux<ChatResponse> stream(Prompt prompt) {
 				inputTokens.set(response.message().usage().inputTokens());
 			}
 			String content = response.type() == StreamingType.CONTENT_BLOCK_DELTA ? response.delta().text() : "";
-
-			var generation = new Generation(content);
-
+			ChatGenerationMetadata chatGenerationMetadata = null;
 			if (response.type() == StreamingType.MESSAGE_DELTA) {
-				generation = generation.withGenerationMetadata(ChatGenerationMetadata
-					.from(response.delta().stopReason(), new Anthropic3ChatBedrockApi.AnthropicUsage(inputTokens.get(),
-							response.usage().outputTokens())));
+				chatGenerationMetadata = ChatGenerationMetadata.from(response.delta().stopReason(),
+						new Anthropic3ChatBedrockApi.AnthropicUsage(inputTokens.get(),
+								response.usage().outputTokens()));
 			}
-
-			return new ChatResponse(List.of(generation));
+			return new ChatResponse(List.of(new Generation(new AssistantMessage(content), chatGenerationMetadata)));
 		});
 	}
 

models/spring-ai-bedrock/src/main/java/org/springframework/ai/bedrock/cohere/BedrockCohereChatModel.java

@@ -25,6 +25,7 @@
 import org.springframework.ai.bedrock.cohere.api.CohereChatBedrockApi;
 import org.springframework.ai.bedrock.cohere.api.CohereChatBedrockApi.CohereChatRequest;
 import org.springframework.ai.bedrock.cohere.api.CohereChatBedrockApi.CohereChatResponse;
+import org.springframework.ai.chat.messages.AssistantMessage;
 import org.springframework.ai.chat.metadata.ChatGenerationMetadata;
 import org.springframework.ai.chat.metadata.Usage;
 import org.springframework.ai.chat.model.ChatModel;
@@ -61,7 +62,10 @@ public BedrockCohereChatModel(CohereChatBedrockApi chatApi, BedrockCohereChatOpt
 	@Override
 	public ChatResponse call(Prompt prompt) {
 		CohereChatResponse response = this.chatApi.chatCompletion(this.createRequest(prompt, false));
-		List<Generation> generations = response.generations().stream().map(g -> new Generation(g.text())).toList();
+		List<Generation> generations = response.generations()
+			.stream()
+			.map(g -> new Generation(new AssistantMessage(g.text())))
+			.toList();
 
 		return new ChatResponse(generations);
 	}
@@ -73,9 +77,9 @@ public Flux<ChatResponse> stream(Prompt prompt) {
 				String finishReason = g.finishReason().name();
 				Usage usage = BedrockUsage.from(g.amazonBedrockInvocationMetrics());
 				return new ChatResponse(List
-					.of(new Generation("").withGenerationMetadata(ChatGenerationMetadata.from(finishReason, usage))));
+					.of(new Generation(new AssistantMessage(""), ChatGenerationMetadata.from(finishReason, usage))));
 			}
-			return new ChatResponse(List.of(new Generation(g.text())));
+			return new ChatResponse(List.of(new Generation(new AssistantMessage(g.text()))));
 		});
 	}
 

models/spring-ai-bedrock/src/main/java/org/springframework/ai/bedrock/jurassic2/BedrockAi21Jurassic2ChatModel.java

@@ -19,6 +19,7 @@
 import org.springframework.ai.bedrock.MessageToPromptConverter;
 import org.springframework.ai.bedrock.jurassic2.api.Ai21Jurassic2ChatBedrockApi;
 import org.springframework.ai.bedrock.jurassic2.api.Ai21Jurassic2ChatBedrockApi.Ai21Jurassic2ChatRequest;
+import org.springframework.ai.chat.messages.AssistantMessage;
 import org.springframework.ai.chat.metadata.ChatGenerationMetadata;
 import org.springframework.ai.chat.model.ChatModel;
 import org.springframework.ai.chat.model.ChatResponse;
@@ -68,8 +69,8 @@ public ChatResponse call(Prompt prompt) {
 
 		return new ChatResponse(response.completions()
 			.stream()
-			.map(completion -> new Generation(completion.data().text())
-				.withGenerationMetadata(ChatGenerationMetadata.from(completion.finishReason().reason(), null)))
+			.map(completion -> new Generation(new AssistantMessage(completion.data().text()),
+					ChatGenerationMetadata.from(completion.finishReason().reason(), null)))
 			.toList());
 	}
 

models/spring-ai-bedrock/src/main/java/org/springframework/ai/bedrock/llama/BedrockLlamaChatModel.java

@@ -24,6 +24,7 @@
 import org.springframework.ai.bedrock.llama.api.LlamaChatBedrockApi;
 import org.springframework.ai.bedrock.llama.api.LlamaChatBedrockApi.LlamaChatRequest;
 import org.springframework.ai.bedrock.llama.api.LlamaChatBedrockApi.LlamaChatResponse;
+import org.springframework.ai.chat.messages.AssistantMessage;
 import org.springframework.ai.chat.metadata.ChatGenerationMetadata;
 import org.springframework.ai.chat.metadata.Usage;
 import org.springframework.ai.chat.model.ChatModel;
@@ -68,7 +69,7 @@ public ChatResponse call(Prompt prompt) {
 
 		LlamaChatResponse response = this.chatApi.chatCompletion(request);
 
-		return new ChatResponse(List.of(new Generation(response.generation()).withGenerationMetadata(
+		return new ChatResponse(List.of(new Generation(new AssistantMessage(response.generation()),
 				ChatGenerationMetadata.from(response.stopReason().name(), extractUsage(response)))));
 	}
 
@@ -81,8 +82,8 @@ public Flux<ChatResponse> stream(Prompt prompt) {
 
 		return fluxResponse.map(response -> {
 			String stopReason = response.stopReason() != null ? response.stopReason().name() : null;
-			return new ChatResponse(List.of(new Generation(response.generation())
-				.withGenerationMetadata(ChatGenerationMetadata.from(stopReason, extractUsage(response)))));
+			return new ChatResponse(List.of(new Generation(new AssistantMessage(response.generation()),
+					ChatGenerationMetadata.from(stopReason, extractUsage(response)))));
 		});
 	}
 

models/spring-ai-bedrock/src/main/java/org/springframework/ai/bedrock/titan/BedrockTitanChatModel.java

@@ -25,6 +25,7 @@
 import org.springframework.ai.bedrock.titan.api.TitanChatBedrockApi.TitanChatRequest;
 import org.springframework.ai.bedrock.titan.api.TitanChatBedrockApi.TitanChatResponse;
 import org.springframework.ai.bedrock.titan.api.TitanChatBedrockApi.TitanChatResponseChunk;
+import org.springframework.ai.chat.messages.AssistantMessage;
 import org.springframework.ai.chat.metadata.ChatGenerationMetadata;
 import org.springframework.ai.chat.metadata.Usage;
 import org.springframework.ai.chat.model.ChatModel;
@@ -62,7 +63,7 @@ public ChatResponse call(Prompt prompt) {
 		TitanChatResponse response = this.chatApi.chatCompletion(this.createRequest(prompt));
 		List<Generation> generations = response.results()
 			.stream()
-			.map(result -> new Generation(result.outputText()))
+			.map(result -> new Generation(new AssistantMessage(result.outputText())))
 			.toList();
 
 		return new ChatResponse(generations);
@@ -71,21 +72,18 @@ public ChatResponse call(Prompt prompt) {
 	@Override
 	public Flux<ChatResponse> stream(Prompt prompt) {
 		return this.chatApi.chatCompletionStream(this.createRequest(prompt)).map(chunk -> {
-
-			Generation generation = new Generation(chunk.outputText());
-
+			ChatGenerationMetadata chatGenerationMetadata = null;
 			if (chunk.amazonBedrockInvocationMetrics() != null) {
 				String completionReason = chunk.completionReason().name();
-				generation = generation.withGenerationMetadata(
-						ChatGenerationMetadata.from(completionReason, chunk.amazonBedrockInvocationMetrics()));
+				chatGenerationMetadata = ChatGenerationMetadata.from(completionReason,
+						chunk.amazonBedrockInvocationMetrics());
 			}
 			else if (chunk.inputTextTokenCount() != null && chunk.totalOutputTextTokenCount() != null) {
 				String completionReason = chunk.completionReason().name();
-				generation = generation
-					.withGenerationMetadata(ChatGenerationMetadata.from(completionReason, extractUsage(chunk)));
-
+				chatGenerationMetadata = ChatGenerationMetadata.from(completionReason, extractUsage(chunk));
 			}
-			return new ChatResponse(List.of(generation));
+			return new ChatResponse(
+					List.of(new Generation(new AssistantMessage(chunk.outputText()), chatGenerationMetadata)));
 		});
 	}
 

models/spring-ai-huggingface/src/main/java/org/springframework/ai/huggingface/HuggingfaceChatModel.java

@@ -23,6 +23,8 @@
 import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.ObjectMapper;
 
+import org.springframework.ai.chat.messages.AssistantMessage;
+import org.springframework.ai.chat.metadata.ChatGenerationMetadata;
 import org.springframework.ai.chat.model.ChatModel;
 import org.springframework.ai.chat.model.ChatResponse;
 import org.springframework.ai.chat.model.Generation;
@@ -103,7 +105,7 @@ public ChatResponse call(Prompt prompt) {
 				new TypeReference<Map<String, Object>>() {
 
 				});
-		Generation generation = new Generation(generatedText, detailsMap);
+		Generation generation = new Generation(new AssistantMessage(generatedText, detailsMap));
 		generations.add(generation);
 		return new ChatResponse(generations);
 	}

models/spring-ai-minimax/src/main/java/org/springframework/ai/minimax/api/MiniMaxApi.java

@@ -224,10 +224,7 @@ public enum ChatModel implements ChatModelDescription {
 		ABAB_6_5_T_Chat("abab6.5t-chat"),
 		ABAB_6_5_G_Chat("abab6.5g-chat"),
 		ABAB_5_5_Chat("abab5.5-chat"),
-		ABAB_5_5_S_Chat("abab5.5s-chat"),
-
-		@Deprecated(since = "1.0.0-M2", forRemoval = true) // Replaced by ABAB_6_5_S_Chat
-		ABAB_6_Chat("abab6-chat");
+		ABAB_5_5_S_Chat("abab5.5s-chat");
 
 		public final String  value;
 
@@ -269,11 +266,6 @@ public enum ChatCompletionFinishReason {
 		 */
 		@JsonProperty("tool_calls")
 		TOOL_CALLS,
-		/**
-		 * (deprecated) The model called a function.
-		 */
-		@JsonProperty("function_call")
-		FUNCTION_CALL,
 		/**
 		 * Only for compatibility with Mistral AI API.
 		 */

models/spring-ai-moonshot/src/main/java/org/springframework/ai/moonshot/api/MoonshotApi.java

@@ -195,11 +195,6 @@ public enum ChatCompletionFinishReason {
 		 */
 		@JsonProperty("tool_calls")
 		TOOL_CALLS,
-		/**
-		 * (deprecated) The model called a function.
-		 */
-		@JsonProperty("function_call")
-		FUNCTION_CALL,
 		/**
 		 * Only for compatibility with Mistral AI API.
 		 */