[maven-release-plugin] prepare for next development iteration

Update README to include gradle project set up options

README.md

@@ -67,10 +67,29 @@ In your Maven project, add this dependency:
 <dependency>
     <groupId>io.github.amithkoujalgi</groupId>
     <artifactId>ollama4j</artifactId>
-    <version>1.0.57</version>
+    <version>1.0.70</version>
 </dependency>
 ```
 
+or
+
+In your Gradle project, add the dependency using the Kotlin DSL or the Groovy DSL:
+
+```kotlin
+dependencies {
+
+    val ollama4jVersion = "1.0.70"
+
+    implementation("io.github.amithkoujalgi:ollama4j:$ollama4jVersion")
+}
+ ```
+
+```groovy
+dependencies {
+    implementation("io.github.amithkoujalgi:ollama4j:1.0.70")
+}
+```
+
 Latest release:
 
 ![Maven Central](https://img.shields.io/maven-central/v/io.github.amithkoujalgi/ollama4j)
@@ -110,6 +129,16 @@ make it
 Releases (newer artifact versions) are done automatically on pushing the code to the `main` branch through GitHub
 Actions CI workflow.
 
+#### Who's using Ollama4j?
+
+- `Datafaker`: a library to generate fake data
+    - https://github.com/datafaker-net/datafaker-experimental/tree/main/ollama-api
+- `Vaadin Web UI`: UI-Tester for Interactions with Ollama via ollama4j
+    - https://github.com/TEAMPB/ollama4j-vaadin-ui
+- `ollama-translator`: Minecraft 1.20.6 spigot plugin allows to easily break language barriers by using ollama on the
+  server to translate all messages into a specfic target language.
+    - https://github.com/liebki/ollama-translator
+
 #### Traction
 
 [![Star History Chart](https://api.star-history.com/svg?repos=amithkoujalgi/ollama4j&type=Date)](https://star-history.com/#amithkoujalgi/ollama4j&Date)
@@ -150,4 +179,4 @@ project.
 
 ### References
 
-- [Ollama REST APIs](https://github.com/jmorganca/ollama/blob/main/docs/api.md)
+- [Ollama REST APIs](https://github.com/jmorganca/ollama/blob/main/docs/api.md)

docs/docs/apis-generate/chat.md

@@ -112,7 +112,7 @@ You will get a response similar to:
 
 ## Use a simple Console Output Stream Handler
 
-```
+```java
 import io.github.amithkoujalgi.ollama4j.core.impl.ConsoleOutputStreamHandler;
 
 public class Main {

pom.xml

@@ -4,7 +4,7 @@
 
     <groupId>io.github.amithkoujalgi</groupId>
     <artifactId>ollama4j</artifactId>
-    <version>1.0.65</version>
+    <version>1.0.73-SNAPSHOT</version>
 
     <name>Ollama4j</name>
     <description>Java library for interacting with Ollama API.</description>
@@ -39,7 +39,7 @@
         <connection>scm:git:git@github.com:amithkoujalgi/ollama4j.git</connection>
         <developerConnection>scm:git:https://github.com/amithkoujalgi/ollama4j.git</developerConnection>
         <url>https://github.com/amithkoujalgi/ollama4j</url>
-        <tag>v1.0.65</tag>
+        <tag>v1.0.16</tag>
     </scm>
 
     <build>
@@ -149,7 +149,12 @@
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
-            <version>2.15.3</version>
+            <version>2.17.1</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.datatype</groupId>
+            <artifactId>jackson-datatype-jsr310</artifactId>
+            <version>2.17.1</version>
         </dependency>
         <dependency>
             <groupId>ch.qos.logback</groupId>

src/main/java/io/github/amithkoujalgi/ollama4j/core/models/Model.java

@@ -1,5 +1,8 @@
 package io.github.amithkoujalgi.ollama4j.core.models;
 
+import java.time.LocalDateTime;
+import java.time.OffsetDateTime;
+
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import io.github.amithkoujalgi.ollama4j.core.utils.Utils;
@@ -11,7 +14,9 @@ public class Model {
   private String name;
   private String model;
   @JsonProperty("modified_at")
-  private String modifiedAt;
+  private OffsetDateTime modifiedAt;
+  @JsonProperty("expires_at")
+  private OffsetDateTime expiresAt;
   private String digest;
   private long size;
   @JsonProperty("details")

src/main/java/io/github/amithkoujalgi/ollama4j/core/models/chat/OllamaChatResponseModel.java

@@ -1,14 +1,15 @@
 package io.github.amithkoujalgi.ollama4j.core.models.chat;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Data;
 
 import java.util.List;
-import lombok.Data;
 
 @Data
 public class OllamaChatResponseModel {
     private String model;
     private @JsonProperty("created_at") String createdAt;
+    private @JsonProperty("done_reason") String doneReason;
     private OllamaChatMessage message;
     private boolean done;
     private String error;

src/main/java/io/github/amithkoujalgi/ollama4j/core/models/request/OllamaChatEndpointCaller.java

@@ -1,12 +1,6 @@
 package io.github.amithkoujalgi.ollama4j.core.models.request;
 
-import java.io.IOException;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import com.fasterxml.jackson.core.JsonProcessingException;
-
 import io.github.amithkoujalgi.ollama4j.core.OllamaStreamHandler;
 import io.github.amithkoujalgi.ollama4j.core.exceptions.OllamaBaseException;
 import io.github.amithkoujalgi.ollama4j.core.models.BasicAuth;
@@ -15,11 +9,15 @@ import io.github.amithkoujalgi.ollama4j.core.models.chat.OllamaChatResponseModel
 import io.github.amithkoujalgi.ollama4j.core.models.chat.OllamaChatStreamObserver;
 import io.github.amithkoujalgi.ollama4j.core.utils.OllamaRequestBody;
 import io.github.amithkoujalgi.ollama4j.core.utils.Utils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
 
 /**
  * Specialization class for requests
  */
-public class OllamaChatEndpointCaller extends OllamaEndpointCaller{
+public class OllamaChatEndpointCaller extends OllamaEndpointCaller {
 
     private static final Logger LOG = LoggerFactory.getLogger(OllamaChatEndpointCaller.class);
 
@@ -39,14 +37,14 @@ public class OllamaChatEndpointCaller extends OllamaEndpointCaller{
         try {
             OllamaChatResponseModel ollamaResponseModel = Utils.getObjectMapper().readValue(line, OllamaChatResponseModel.class);
             responseBuffer.append(ollamaResponseModel.getMessage().getContent());
-            if(streamObserver != null) {
+            if (streamObserver != null) {
                 streamObserver.notify(ollamaResponseModel);
             }
             return ollamaResponseModel.isDone();
         } catch (JsonProcessingException e) {
-            LOG.error("Error parsing the Ollama chat response!",e);
+            LOG.error("Error parsing the Ollama chat response!", e);
             return true;
-        }         
+        }
     }
 
     public OllamaResult call(OllamaRequestBody body, OllamaStreamHandler streamHandler)
@@ -54,7 +52,4 @@ public class OllamaChatEndpointCaller extends OllamaEndpointCaller{
         streamObserver = new OllamaChatStreamObserver(streamHandler);
         return super.callSync(body);
     }
-
-    
- 
 }

src/main/java/io/github/amithkoujalgi/ollama4j/core/models/request/OllamaEndpointCaller.java

@@ -1,5 +1,15 @@
 package io.github.amithkoujalgi.ollama4j.core.models.request;
 
+import io.github.amithkoujalgi.ollama4j.core.OllamaAPI;
+import io.github.amithkoujalgi.ollama4j.core.exceptions.OllamaBaseException;
+import io.github.amithkoujalgi.ollama4j.core.models.BasicAuth;
+import io.github.amithkoujalgi.ollama4j.core.models.OllamaErrorResponseModel;
+import io.github.amithkoujalgi.ollama4j.core.models.OllamaResult;
+import io.github.amithkoujalgi.ollama4j.core.utils.OllamaRequestBody;
+import io.github.amithkoujalgi.ollama4j.core.utils.Utils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStream;
@@ -12,22 +22,11 @@ import java.nio.charset.StandardCharsets;
 import java.time.Duration;
 import java.util.Base64;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import io.github.amithkoujalgi.ollama4j.core.OllamaAPI;
-import io.github.amithkoujalgi.ollama4j.core.exceptions.OllamaBaseException;
-import io.github.amithkoujalgi.ollama4j.core.models.BasicAuth;
-import io.github.amithkoujalgi.ollama4j.core.models.OllamaErrorResponseModel;
-import io.github.amithkoujalgi.ollama4j.core.models.OllamaResult;
-import io.github.amithkoujalgi.ollama4j.core.utils.OllamaRequestBody;
-import io.github.amithkoujalgi.ollama4j.core.utils.Utils;
-
 /**
  * Abstract helperclass to call the ollama api server.
  */
 public abstract class OllamaEndpointCaller {
-    
+
     private static final Logger LOG = LoggerFactory.getLogger(OllamaAPI.class);
 
     private String host;
@@ -49,107 +48,105 @@ public abstract class OllamaEndpointCaller {
 
     /**
      * Calls the api server on the given host and endpoint suffix asynchronously, aka waiting for the response.
-     * 
+     *
      * @param body POST body payload
      * @return result answer given by the assistant
-     * @throws OllamaBaseException any response code than 200 has been returned
-     * @throws IOException in case the responseStream can not be read
+     * @throws OllamaBaseException  any response code than 200 has been returned
+     * @throws IOException          in case the responseStream can not be read
      * @throws InterruptedException in case the server is not reachable or network issues happen
      */
-    public OllamaResult callSync(OllamaRequestBody body)  throws OllamaBaseException, IOException, InterruptedException{
-
+    public OllamaResult callSync(OllamaRequestBody body) throws OllamaBaseException, IOException, InterruptedException {
         // Create Request
-    long startTime = System.currentTimeMillis();
-    HttpClient httpClient = HttpClient.newHttpClient();
-    URI uri = URI.create(this.host + getEndpointSuffix());
-    HttpRequest.Builder requestBuilder =
-        getRequestBuilderDefault(uri)
-            .POST(
-                body.getBodyPublisher());
-    HttpRequest request = requestBuilder.build();
-    if (this.verbose) LOG.info("Asking model: " + body.toString());
-    HttpResponse<InputStream> response =
-        httpClient.send(request, HttpResponse.BodyHandlers.ofInputStream());
-    
-        
+        long startTime = System.currentTimeMillis();
+        HttpClient httpClient = HttpClient.newHttpClient();
+        URI uri = URI.create(this.host + getEndpointSuffix());
+        HttpRequest.Builder requestBuilder =
+                getRequestBuilderDefault(uri)
+                        .POST(
+                                body.getBodyPublisher());
+        HttpRequest request = requestBuilder.build();
+        if (this.verbose) LOG.info("Asking model: " + body.toString());
+        HttpResponse<InputStream> response =
+                httpClient.send(request, HttpResponse.BodyHandlers.ofInputStream());
+
         int statusCode = response.statusCode();
-    InputStream responseBodyStream = response.body();
-    StringBuilder responseBuffer = new StringBuilder();
-    try (BufferedReader reader =
-        new BufferedReader(new InputStreamReader(responseBodyStream, StandardCharsets.UTF_8))) {
-      String line;
-      while ((line = reader.readLine()) != null) {
-        if (statusCode == 404) {
-            LOG.warn("Status code: 404 (Not Found)");
-          OllamaErrorResponseModel ollamaResponseModel =
-              Utils.getObjectMapper().readValue(line, OllamaErrorResponseModel.class);
-          responseBuffer.append(ollamaResponseModel.getError());
-        } else if (statusCode == 401) {
-            LOG.warn("Status code: 401 (Unauthorized)");
-          OllamaErrorResponseModel ollamaResponseModel =
-              Utils.getObjectMapper()
-                  .readValue("{\"error\":\"Unauthorized\"}", OllamaErrorResponseModel.class);
-          responseBuffer.append(ollamaResponseModel.getError());
-        } else if (statusCode == 400) {
-          LOG.warn("Status code: 400 (Bad Request)");
-          OllamaErrorResponseModel ollamaResponseModel = Utils.getObjectMapper().readValue(line,
-              OllamaErrorResponseModel.class);
-          responseBuffer.append(ollamaResponseModel.getError());
-        } else {
-          boolean finished = parseResponseAndAddToBuffer(line,responseBuffer);
-            if (finished) {
-              break;
+        InputStream responseBodyStream = response.body();
+        StringBuilder responseBuffer = new StringBuilder();
+        try (BufferedReader reader =
+                     new BufferedReader(new InputStreamReader(responseBodyStream, StandardCharsets.UTF_8))) {
+            String line;
+            while ((line = reader.readLine()) != null) {
+                if (statusCode == 404) {
+                    LOG.warn("Status code: 404 (Not Found)");
+                    OllamaErrorResponseModel ollamaResponseModel =
+                            Utils.getObjectMapper().readValue(line, OllamaErrorResponseModel.class);
+                    responseBuffer.append(ollamaResponseModel.getError());
+                } else if (statusCode == 401) {
+                    LOG.warn("Status code: 401 (Unauthorized)");
+                    OllamaErrorResponseModel ollamaResponseModel =
+                            Utils.getObjectMapper()
+                                    .readValue("{\"error\":\"Unauthorized\"}", OllamaErrorResponseModel.class);
+                    responseBuffer.append(ollamaResponseModel.getError());
+                } else if (statusCode == 400) {
+                    LOG.warn("Status code: 400 (Bad Request)");
+                    OllamaErrorResponseModel ollamaResponseModel = Utils.getObjectMapper().readValue(line,
+                            OllamaErrorResponseModel.class);
+                    responseBuffer.append(ollamaResponseModel.getError());
+                } else {
+                    boolean finished = parseResponseAndAddToBuffer(line, responseBuffer);
+                    if (finished) {
+                        break;
+                    }
+                }
             }
         }
-      }
-    }
 
-    if (statusCode != 200) {
-        LOG.error("Status code " + statusCode);
-      throw new OllamaBaseException(responseBuffer.toString());
-    } else {
-      long endTime = System.currentTimeMillis();
-      OllamaResult ollamaResult =
-          new OllamaResult(responseBuffer.toString().trim(), endTime - startTime, statusCode);
-      if (verbose) LOG.info("Model response: " + ollamaResult);
-      return ollamaResult;
+        if (statusCode != 200) {
+            LOG.error("Status code " + statusCode);
+            throw new OllamaBaseException(responseBuffer.toString());
+        } else {
+            long endTime = System.currentTimeMillis();
+            OllamaResult ollamaResult =
+                    new OllamaResult(responseBuffer.toString().trim(), endTime - startTime, statusCode);
+            if (verbose) LOG.info("Model response: " + ollamaResult);
+            return ollamaResult;
+        }
     }
-  }
 
     /**
-   * Get default request builder.
-   *
-   * @param uri URI to get a HttpRequest.Builder
-   * @return HttpRequest.Builder
-   */
-  private HttpRequest.Builder getRequestBuilderDefault(URI uri) {
-    HttpRequest.Builder requestBuilder =
-        HttpRequest.newBuilder(uri)
-            .header("Content-Type", "application/json")
-            .timeout(Duration.ofSeconds(this.requestTimeoutSeconds));
-    if (isBasicAuthCredentialsSet()) {
-      requestBuilder.header("Authorization", getBasicAuthHeaderValue());
+     * Get default request builder.
+     *
+     * @param uri URI to get a HttpRequest.Builder
+     * @return HttpRequest.Builder
+     */
+    private HttpRequest.Builder getRequestBuilderDefault(URI uri) {
+        HttpRequest.Builder requestBuilder =
+                HttpRequest.newBuilder(uri)
+                        .header("Content-Type", "application/json")
+                        .timeout(Duration.ofSeconds(this.requestTimeoutSeconds));
+        if (isBasicAuthCredentialsSet()) {
+            requestBuilder.header("Authorization", getBasicAuthHeaderValue());
+        }
+        return requestBuilder;
     }
-    return requestBuilder;
-  }
 
-  /**
-   * Get basic authentication header value.
-   *
-   * @return basic authentication header value (encoded credentials)
-   */
-  private String getBasicAuthHeaderValue() {
-    String credentialsToEncode = this.basicAuth.getUsername() + ":" + this.basicAuth.getPassword();
-    return "Basic " + Base64.getEncoder().encodeToString(credentialsToEncode.getBytes());
-  }
+    /**
+     * Get basic authentication header value.
+     *
+     * @return basic authentication header value (encoded credentials)
+     */
+    private String getBasicAuthHeaderValue() {
+        String credentialsToEncode = this.basicAuth.getUsername() + ":" + this.basicAuth.getPassword();
+        return "Basic " + Base64.getEncoder().encodeToString(credentialsToEncode.getBytes());
+    }
+
+    /**
+     * Check if Basic Auth credentials set.
+     *
+     * @return true when Basic Auth credentials set
+     */
+    private boolean isBasicAuthCredentialsSet() {
+        return this.basicAuth != null;
+    }
 
-  /**
-   * Check if Basic Auth credentials set.
-   *
-   * @return true when Basic Auth credentials set
-   */
-  private boolean isBasicAuthCredentialsSet() {
-    return this.basicAuth != null;
-  }
-    
 }

src/main/java/io/github/amithkoujalgi/ollama4j/core/utils/Utils.java

@@ -8,10 +8,18 @@ import java.net.URISyntaxException;
 import java.net.URL;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
 
 public class Utils {
+
+  private static ObjectMapper objectMapper;
+
   public static ObjectMapper getObjectMapper() {
-    return new ObjectMapper();
+    if(objectMapper == null) {
+      objectMapper = new ObjectMapper();
+      objectMapper.registerModule(new JavaTimeModule());
+    }
+    return objectMapper;
   }
 
   public static byte[] loadImageBytesFromUrl(String imageUrl)

src/test/java/io/github/amithkoujalgi/ollama4j/unittests/jackson/AbstractSerializationTest.java

@@ -6,30 +6,30 @@ import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import io.github.amithkoujalgi.ollama4j.core.utils.Utils;
 
-public abstract class AbstractRequestSerializationTest<T> {
+public abstract class AbstractSerializationTest<T> {
 
     protected ObjectMapper mapper = Utils.getObjectMapper();
 
-    protected String serializeRequest(T req) {
+    protected String serialize(T obj) {
         try {
-            return mapper.writeValueAsString(req);
+            return mapper.writeValueAsString(obj);
         } catch (JsonProcessingException e) {
             fail("Could not serialize request!", e);
             return null;
         }
     }
 
-    protected T deserializeRequest(String jsonRequest, Class<T> requestClass) {
+    protected T deserialize(String jsonObject, Class<T> deserializationClass) {
         try {
-            return mapper.readValue(jsonRequest, requestClass);
+            return mapper.readValue(jsonObject, deserializationClass);
         } catch (JsonProcessingException e) {
-            fail("Could not deserialize jsonRequest!", e);
+            fail("Could not deserialize jsonObject!", e);
             return null;
         }
     }
 
-    protected void assertEqualsAfterUnmarshalling(T unmarshalledRequest,
+    protected void assertEqualsAfterUnmarshalling(T unmarshalledObject,
         T req) {
-        assertEquals(req, unmarshalledRequest);
+        assertEquals(req, unmarshalledObject);
     }
 }

src/test/java/io/github/amithkoujalgi/ollama4j/unittests/jackson/TestChatRequestSerialization.java

@@ -14,7 +14,7 @@ import io.github.amithkoujalgi.ollama4j.core.models.chat.OllamaChatRequestBuilde
 import io.github.amithkoujalgi.ollama4j.core.models.chat.OllamaChatRequestModel;
 import io.github.amithkoujalgi.ollama4j.core.utils.OptionsBuilder;
 
-public class TestChatRequestSerialization extends AbstractRequestSerializationTest<OllamaChatRequestModel>{
+public class TestChatRequestSerialization extends AbstractSerializationTest<OllamaChatRequestModel> {
 
     private OllamaChatRequestBuilder builder;
 
@@ -26,8 +26,8 @@ public class TestChatRequestSerialization extends AbstractRequestSerializationTe
     @Test
     public void testRequestOnlyMandatoryFields() {
         OllamaChatRequestModel req = builder.withMessage(OllamaChatMessageRole.USER, "Some prompt").build();
-        String jsonRequest = serializeRequest(req);
-        assertEqualsAfterUnmarshalling(deserializeRequest(jsonRequest,OllamaChatRequestModel.class), req);
+        String jsonRequest = serialize(req);
+        assertEqualsAfterUnmarshalling(deserialize(jsonRequest,OllamaChatRequestModel.class), req);
     }
 
     @Test
@@ -35,16 +35,16 @@ public class TestChatRequestSerialization extends AbstractRequestSerializationTe
         OllamaChatRequestModel req = builder.withMessage(OllamaChatMessageRole.SYSTEM, "System prompt")
         .withMessage(OllamaChatMessageRole.USER, "Some prompt")
         .build();
-        String jsonRequest = serializeRequest(req);
-        assertEqualsAfterUnmarshalling(deserializeRequest(jsonRequest,OllamaChatRequestModel.class), req);
+        String jsonRequest = serialize(req);
+        assertEqualsAfterUnmarshalling(deserialize(jsonRequest,OllamaChatRequestModel.class), req);
     }
 
     @Test
     public void testRequestWithMessageAndImage() {
         OllamaChatRequestModel req = builder.withMessage(OllamaChatMessageRole.USER, "Some prompt",
                 List.of(new File("src/test/resources/dog-on-a-boat.jpg"))).build();
-        String jsonRequest = serializeRequest(req);
-        assertEqualsAfterUnmarshalling(deserializeRequest(jsonRequest,OllamaChatRequestModel.class), req);
+        String jsonRequest = serialize(req);
+        assertEqualsAfterUnmarshalling(deserialize(jsonRequest,OllamaChatRequestModel.class), req);
     }
 
     @Test
@@ -61,8 +61,8 @@ public class TestChatRequestSerialization extends AbstractRequestSerializationTe
             .withOptions(b.setTopP(1).build())
             .build();
 
-        String jsonRequest = serializeRequest(req);
-        OllamaChatRequestModel deserializeRequest = deserializeRequest(jsonRequest, OllamaChatRequestModel.class);
+        String jsonRequest = serialize(req);
+        OllamaChatRequestModel deserializeRequest = deserialize(jsonRequest, OllamaChatRequestModel.class);
         assertEqualsAfterUnmarshalling(deserializeRequest, req);
         assertEquals(1, deserializeRequest.getOptions().get("mirostat"));
         assertEquals(1.0, deserializeRequest.getOptions().get("temperature"));
@@ -79,7 +79,7 @@ public class TestChatRequestSerialization extends AbstractRequestSerializationTe
         OllamaChatRequestModel req = builder.withMessage(OllamaChatMessageRole.USER, "Some prompt")
                 .withGetJsonResponse().build();
 
-        String jsonRequest = serializeRequest(req);
+        String jsonRequest = serialize(req);
         // no jackson deserialization as format property is not boolean ==> omit as deserialization
         // of request is never used in real code anyways
         JSONObject jsonObject = new JSONObject(jsonRequest);
@@ -91,15 +91,15 @@ public class TestChatRequestSerialization extends AbstractRequestSerializationTe
     public void testWithTemplate() {
         OllamaChatRequestModel req = builder.withTemplate("System Template")
             .build();
-        String jsonRequest = serializeRequest(req);
-        assertEqualsAfterUnmarshalling(deserializeRequest(jsonRequest, OllamaChatRequestModel.class), req);
+        String jsonRequest = serialize(req);
+        assertEqualsAfterUnmarshalling(deserialize(jsonRequest, OllamaChatRequestModel.class), req);
     }
 
     @Test
     public void testWithStreaming() {
         OllamaChatRequestModel req = builder.withStreaming().build();
-        String jsonRequest = serializeRequest(req);
-        assertEquals(deserializeRequest(jsonRequest, OllamaChatRequestModel.class).isStream(), true);
+        String jsonRequest = serialize(req);
+        assertEquals(deserialize(jsonRequest, OllamaChatRequestModel.class).isStream(), true);
     }
 
     @Test
@@ -107,7 +107,7 @@ public class TestChatRequestSerialization extends AbstractRequestSerializationTe
         String expectedKeepAlive = "5m";
         OllamaChatRequestModel req = builder.withKeepAlive(expectedKeepAlive)
             .build();
-        String jsonRequest = serializeRequest(req);
-        assertEquals(deserializeRequest(jsonRequest, OllamaChatRequestModel.class).getKeepAlive(), expectedKeepAlive);
+        String jsonRequest = serialize(req);
+        assertEquals(deserialize(jsonRequest, OllamaChatRequestModel.class).getKeepAlive(), expectedKeepAlive);
     }
 }

src/test/java/io/github/amithkoujalgi/ollama4j/unittests/jackson/TestEmbeddingsRequestSerialization.java

@@ -7,7 +7,7 @@ import io.github.amithkoujalgi.ollama4j.core.models.embeddings.OllamaEmbeddingsR
 import io.github.amithkoujalgi.ollama4j.core.models.embeddings.OllamaEmbeddingsRequestBuilder;
 import io.github.amithkoujalgi.ollama4j.core.utils.OptionsBuilder;
 
-public class TestEmbeddingsRequestSerialization extends AbstractRequestSerializationTest<OllamaEmbeddingsRequestModel>{
+public class TestEmbeddingsRequestSerialization extends AbstractSerializationTest<OllamaEmbeddingsRequestModel> {
 
         private OllamaEmbeddingsRequestBuilder builder;
 
@@ -19,8 +19,8 @@ public class TestEmbeddingsRequestSerialization extends AbstractRequestSerializa
             @Test
     public void testRequestOnlyMandatoryFields() {
         OllamaEmbeddingsRequestModel req = builder.build();
-        String jsonRequest = serializeRequest(req);
-        assertEqualsAfterUnmarshalling(deserializeRequest(jsonRequest,OllamaEmbeddingsRequestModel.class), req);
+        String jsonRequest = serialize(req);
+        assertEqualsAfterUnmarshalling(deserialize(jsonRequest,OllamaEmbeddingsRequestModel.class), req);
     }
 
         @Test
@@ -29,8 +29,8 @@ public class TestEmbeddingsRequestSerialization extends AbstractRequestSerializa
             OllamaEmbeddingsRequestModel req = builder
                     .withOptions(b.setMirostat(1).build()).build();
 
-            String jsonRequest = serializeRequest(req);
-            OllamaEmbeddingsRequestModel deserializeRequest = deserializeRequest(jsonRequest,OllamaEmbeddingsRequestModel.class);
+            String jsonRequest = serialize(req);
+            OllamaEmbeddingsRequestModel deserializeRequest = deserialize(jsonRequest,OllamaEmbeddingsRequestModel.class);
             assertEqualsAfterUnmarshalling(deserializeRequest, req);
             assertEquals(1, deserializeRequest.getOptions().get("mirostat"));
         }

src/test/java/io/github/amithkoujalgi/ollama4j/unittests/jackson/TestGenerateRequestSerialization.java

@@ -11,7 +11,7 @@ import io.github.amithkoujalgi.ollama4j.core.models.generate.OllamaGenerateReque
 import io.github.amithkoujalgi.ollama4j.core.models.generate.OllamaGenerateRequestModel;
 import io.github.amithkoujalgi.ollama4j.core.utils.OptionsBuilder;
 
-public class TestGenerateRequestSerialization extends AbstractRequestSerializationTest<OllamaGenerateRequestModel>{
+public class TestGenerateRequestSerialization extends AbstractSerializationTest<OllamaGenerateRequestModel> {
 
     private OllamaGenerateRequestBuilder builder;
 
@@ -24,8 +24,8 @@ public class TestGenerateRequestSerialization extends AbstractRequestSerializati
     public void testRequestOnlyMandatoryFields() {
         OllamaGenerateRequestModel req = builder.withPrompt("Some prompt").build();
 
-        String jsonRequest = serializeRequest(req);
-        assertEqualsAfterUnmarshalling(deserializeRequest(jsonRequest, OllamaGenerateRequestModel.class), req);
+        String jsonRequest = serialize(req);
+        assertEqualsAfterUnmarshalling(deserialize(jsonRequest, OllamaGenerateRequestModel.class), req);
     }
 
     @Test
@@ -34,8 +34,8 @@ public class TestGenerateRequestSerialization extends AbstractRequestSerializati
         OllamaGenerateRequestModel req =
                 builder.withPrompt("Some prompt").withOptions(b.setMirostat(1).build()).build();
 
-        String jsonRequest = serializeRequest(req);
-        OllamaGenerateRequestModel deserializeRequest = deserializeRequest(jsonRequest, OllamaGenerateRequestModel.class);
+        String jsonRequest = serialize(req);
+        OllamaGenerateRequestModel deserializeRequest = deserialize(jsonRequest, OllamaGenerateRequestModel.class);
         assertEqualsAfterUnmarshalling(deserializeRequest, req);
         assertEquals(1, deserializeRequest.getOptions().get("mirostat"));
     }
@@ -45,7 +45,7 @@ public class TestGenerateRequestSerialization extends AbstractRequestSerializati
         OllamaGenerateRequestModel req =
                 builder.withPrompt("Some prompt").withGetJsonResponse().build();
 
-        String jsonRequest = serializeRequest(req);
+        String jsonRequest = serialize(req);
         // no jackson deserialization as format property is not boolean ==> omit as deserialization
         // of request is never used in real code anyways
         JSONObject jsonObject = new JSONObject(jsonRequest);

src/test/java/io/github/amithkoujalgi/ollama4j/unittests/jackson/TestModelRequestSerialization.java

@@ -0,0 +1,42 @@
+package io.github.amithkoujalgi.ollama4j.unittests.jackson;
+
+import io.github.amithkoujalgi.ollama4j.core.models.Model;
+import org.junit.jupiter.api.Test;
+
+public class TestModelRequestSerialization extends AbstractSerializationTest<Model> {
+
+    @Test
+    public void testDeserializationOfModelResponseWithOffsetTime(){
+        String serializedTestStringWithOffsetTime = "{\n"
+                + "\"name\": \"codellama:13b\",\n"
+                + "\"modified_at\": \"2023-11-04T14:56:49.277302595-07:00\",\n"
+                + "\"size\": 7365960935,\n"
+                + "\"digest\": \"9f438cb9cd581fc025612d27f7c1a6669ff83a8bb0ed86c94fcf4c5440555697\",\n"
+                + "\"details\": {\n"
+                + "\"format\": \"gguf\",\n"
+                + "\"family\": \"llama\",\n"
+                + "\"families\": null,\n"
+                + "\"parameter_size\": \"13B\",\n"
+                + "\"quantization_level\": \"Q4_0\"\n"
+                + "}}";
+        deserialize(serializedTestStringWithOffsetTime,Model.class);
+    }
+
+    @Test
+    public void testDeserializationOfModelResponseWithZuluTime(){
+        String serializedTestStringWithZuluTimezone = "{\n"
+                + "\"name\": \"codellama:13b\",\n"
+                + "\"modified_at\": \"2023-11-04T14:56:49.277302595Z\",\n"
+                + "\"size\": 7365960935,\n"
+                + "\"digest\": \"9f438cb9cd581fc025612d27f7c1a6669ff83a8bb0ed86c94fcf4c5440555697\",\n"
+                + "\"details\": {\n"
+                + "\"format\": \"gguf\",\n"
+                + "\"family\": \"llama\",\n"
+                + "\"families\": null,\n"
+                + "\"parameter_size\": \"13B\",\n"
+                + "\"quantization_level\": \"Q4_0\"\n"
+                + "}}";
+        deserialize(serializedTestStringWithZuluTimezone,Model.class);
+    }
+
+}