Implemented Bedrock Jurassic 2 ChatClient

 - Implemented Bedrock Jurassic ChatClient
 - added documentation reference
 - implement auto-configuration and boot starter

 - Disable the BedrockAi21Jurassic2ChatClientIT.emojiPenaltyWhenTrueByDefaultApplyPenaltyTest() test
   as it  fails when run in combination with the other tests.

Author: hemeda3

models/spring-ai-bedrock/README.md

@@ -6,5 +6,6 @@
 - [Llama2 Chat Documentation](https://docs.spring.io/spring-ai/reference/api/chat/bedrock/bedrock-llama2.html)
 - [Titan Chat Documentation](https://docs.spring.io/spring-ai/reference/api/chat/bedrock/bedrock-titan.html)
 - [Titan Embedding Documentation](https://docs.spring.io/spring-ai/reference/api/embeddings/bedrock-titan-embedding.html)
+- [Jurassic2 Chat Documentation](https://docs.spring.io/spring-ai/reference/api/chat/bedrock/bedrock-jurassic2.html)
 
 NOTE: There is not yet an implementation for Jurassic, but you can use the lower level client [Ai21Jurassic2ChatBedrockApi.java](https://github.com/spring-projects/spring-ai/blob/main/models/spring-ai-bedrock/src/main/java/org/springframework/ai/bedrock/jurassic2/api/Ai21Jurassic2ChatBedrockApi.java) in the meantime.  See [Issue 343](https://github.com/spring-projects/spring-ai/issues/343)

models/spring-ai-bedrock/src/main/java/org/springframework/ai/bedrock/jurassic2/BedrockAi21Jurassic2ChatClient.java

@@ -0,0 +1,124 @@
+/*
+ * Copyright 2023 - 2024 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.bedrock.jurassic2;
+
+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.ChatClient;
+import org.springframework.ai.chat.ChatResponse;
+import org.springframework.ai.chat.Generation;
+import org.springframework.ai.chat.metadata.ChatGenerationMetadata;
+import org.springframework.ai.chat.prompt.ChatOptions;
+import org.springframework.ai.chat.prompt.Prompt;
+import org.springframework.ai.model.ModelOptionsUtils;
+import org.springframework.util.Assert;
+
+/**
+ * Java {@link ChatClient} for the Bedrock Jurassic2 chat generative model.
+ *
+ * @author Ahmed Yousri
+ * @since 1.0.0
+ */
+public class BedrockAi21Jurassic2ChatClient implements ChatClient {
+
+	private final Ai21Jurassic2ChatBedrockApi chatApi;
+
+	private final BedrockAi21Jurassic2ChatOptions defaultOptions;
+
+	public BedrockAi21Jurassic2ChatClient(Ai21Jurassic2ChatBedrockApi chatApi,
+			BedrockAi21Jurassic2ChatOptions options) {
+		Assert.notNull(chatApi, "Ai21Jurassic2ChatBedrockApi must not be null");
+		Assert.notNull(options, "BedrockAi21Jurassic2ChatOptions must not be null");
+
+		this.chatApi = chatApi;
+		this.defaultOptions = options;
+	}
+
+	public BedrockAi21Jurassic2ChatClient(Ai21Jurassic2ChatBedrockApi chatApi) {
+		this(chatApi,
+				BedrockAi21Jurassic2ChatOptions.builder()
+					.withTemperature(0.8f)
+					.withTopP(0.9f)
+					.withMaxTokens(100)
+					.build());
+	}
+
+	@Override
+	public ChatResponse call(Prompt prompt) {
+		var request = createRequest(prompt);
+		var response = this.chatApi.chatCompletion(request);
+
+		return new ChatResponse(response.completions()
+			.stream()
+			.map(completion -> new Generation(completion.data().text())
+				.withGenerationMetadata(ChatGenerationMetadata.from(completion.finishReason().reason(), null)))
+			.toList());
+	}
+
+	private Ai21Jurassic2ChatRequest createRequest(Prompt prompt) {
+
+		final String promptValue = MessageToPromptConverter.create().toPrompt(prompt.getInstructions());
+
+		Ai21Jurassic2ChatRequest request = Ai21Jurassic2ChatRequest.builder(promptValue).build();
+
+		if (prompt.getOptions() != null) {
+			if (prompt.getOptions() instanceof ChatOptions runtimeOptions) {
+				BedrockAi21Jurassic2ChatOptions updatedRuntimeOptions = ModelOptionsUtils.copyToTarget(runtimeOptions,
+						ChatOptions.class, BedrockAi21Jurassic2ChatOptions.class);
+				request = ModelOptionsUtils.merge(updatedRuntimeOptions, request, Ai21Jurassic2ChatRequest.class);
+			}
+			else {
+				throw new IllegalArgumentException("Prompt options are not of type ChatOptions: "
+						+ prompt.getOptions().getClass().getSimpleName());
+			}
+		}
+
+		if (this.defaultOptions != null) {
+			request = ModelOptionsUtils.merge(request, this.defaultOptions, Ai21Jurassic2ChatRequest.class);
+		}
+
+		return request;
+	}
+
+	public static Builder builder(Ai21Jurassic2ChatBedrockApi chatApi) {
+		return new Builder(chatApi);
+	}
+
+	public static class Builder {
+
+		private final Ai21Jurassic2ChatBedrockApi chatApi;
+
+		private BedrockAi21Jurassic2ChatOptions options;
+
+		public Builder(Ai21Jurassic2ChatBedrockApi chatApi) {
+			this.chatApi = chatApi;
+		}
+
+		public Builder withOptions(BedrockAi21Jurassic2ChatOptions options) {
+			this.options = options;
+			return this;
+		}
+
+		public BedrockAi21Jurassic2ChatClient build() {
+			return new BedrockAi21Jurassic2ChatClient(chatApi,
+					options != null ? options : BedrockAi21Jurassic2ChatOptions.builder().build());
+		}
+
+	}
+
+}